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![Ernestas Kulik](/assets/img/avatar_default.png)
Shadowing variables is error-prone, since one might mean to refer to a variable that was declared earlier, but has the same name. Additionally, being more strict about variable scoping can help make the code more readable.
4154 lines
108 KiB
C
4154 lines
108 KiB
C
/*
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* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
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* All rights reserved.
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*
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* This file is part of the Gnome Library.
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*
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* The Gnome Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Gnome Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the Gnome Library; see the file COPYING.LIB. If not,
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* see <http://www.gnu.org/licenses/>.
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*/
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/*
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* @NOTATION@
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*/
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/*
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* EelCanvas widget - Tk-like canvas widget for Gnome
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*
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* EelCanvas is basically a port of the Tk toolkit's most excellent canvas widget. Tk is
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* copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
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*
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*
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* Authors: Federico Mena <federico@nuclecu.unam.mx>
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* Raph Levien <raph@gimp.org>
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*/
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/*
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* TO-DO list for the canvas:
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*
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* - Allow to specify whether EelCanvasImage sizes are in units or pixels (scale or don't scale).
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*
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* - GC put functions for items.
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*
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* - Widget item (finish it).
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*
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* - GList *eel_canvas_gimme_all_items_contained_in_this_area (EelCanvas *canvas, Rectangle area);
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*
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* - Retrofit all the primitive items with microtile support.
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*
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* - Curve support for line item.
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*
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* - Arc item (Havoc has it; to be integrated in EelCanvasEllipse).
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*
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* - Sane font handling API.
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*
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* - Get_arg methods for items:
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* - How to fetch the outline width and know whether it is in pixels or units?
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*/
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#include <config.h>
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#include <math.h>
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#include <string.h>
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#include <stdio.h>
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#include <gdk/gdkprivate.h>
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#include <gtk/gtk.h>
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#include <glib/gi18n-lib.h>
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#include <cairo-gobject.h>
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#include "eel-canvas.h"
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static void eel_canvas_request_update (EelCanvas *canvas);
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static void group_add (EelCanvasGroup *group,
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EelCanvasItem *item);
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static void group_remove (EelCanvasGroup *group,
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EelCanvasItem *item);
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static void redraw_and_repick_if_mapped (EelCanvasItem *item);
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/*** EelCanvasItem ***/
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/* Some convenience stuff */
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#define GCI_UPDATE_MASK (EEL_CANVAS_UPDATE_REQUESTED | EEL_CANVAS_UPDATE_DEEP)
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enum
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{
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ITEM_PROP_0,
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ITEM_PROP_VISIBLE
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};
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enum
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{
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ITEM_DESTROY,
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ITEM_EVENT,
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ITEM_LAST_SIGNAL
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};
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static void eel_canvas_item_class_init (EelCanvasItemClass *klass);
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static void eel_canvas_item_init (EelCanvasItem *item);
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static int emit_event (EelCanvas *canvas,
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GdkEvent *event);
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static guint item_signals[ITEM_LAST_SIGNAL];
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static GObjectClass *item_parent_class;
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static gpointer accessible_item_parent_class;
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static gpointer accessible_parent_class;
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/**
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* eel_canvas_item_get_type:
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*
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* Registers the &EelCanvasItem class if necessary, and returns the type ID
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* associated to it.
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*
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* Return value: The type ID of the &EelCanvasItem class.
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**/
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GType
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eel_canvas_item_get_type (void)
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{
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static GType canvas_item_type = 0;
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if (!canvas_item_type)
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{
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static const GTypeInfo canvas_item_info =
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{
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sizeof (EelCanvasItemClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) eel_canvas_item_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (EelCanvasItem),
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0, /* n_preallocs */
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(GInstanceInitFunc) eel_canvas_item_init
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};
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canvas_item_type = g_type_register_static (G_TYPE_INITIALLY_UNOWNED,
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"EelCanvasItem",
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&canvas_item_info,
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0);
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}
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return canvas_item_type;
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}
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/* Object initialization function for EelCanvasItem */
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static void
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eel_canvas_item_init (EelCanvasItem *item)
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{
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item->flags |= EEL_CANVAS_ITEM_VISIBLE;
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}
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/* Performs post-creation operations on a canvas item (adding it to its parent
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* group, etc.)
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*/
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static void
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item_post_create_setup (EelCanvasItem *item)
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{
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group_add (EEL_CANVAS_GROUP (item->parent), item);
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redraw_and_repick_if_mapped (item);
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}
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/**
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* eel_canvas_item_new:
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* @parent: The parent group for the new item.
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* @type: The object type of the item.
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* @first_arg_name: A list of object argument name/value pairs, NULL-terminated,
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* used to configure the item. For example, "fill_color", "black",
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* "width_units", 5.0, NULL.
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* @Varargs:
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*
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* Creates a new canvas item with @parent as its parent group. The item is
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* created at the top of its parent's stack, and starts up as visible. The item
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* is of the specified @type, for example, it can be
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* eel_canvas_rect_get_type(). The list of object arguments/value pairs is
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* used to configure the item.
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*
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* Return value: The newly-created item.
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**/
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EelCanvasItem *
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eel_canvas_item_new (EelCanvasGroup *parent,
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GType type,
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const gchar *first_arg_name,
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...)
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{
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EelCanvasItem *item;
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va_list args;
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g_return_val_if_fail (EEL_IS_CANVAS_GROUP (parent), NULL);
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g_return_val_if_fail (g_type_is_a (type, eel_canvas_item_get_type ()), NULL);
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item = EEL_CANVAS_ITEM (g_object_new (type, NULL));
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item->parent = EEL_CANVAS_ITEM (parent);
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item->canvas = item->parent->canvas;
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va_start (args, first_arg_name);
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g_object_set_valist (G_OBJECT (item), first_arg_name, args);
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va_end (args);
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item_post_create_setup (item);
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return item;
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}
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/* Set_property handler for canvas items */
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static void
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eel_canvas_item_set_property (GObject *gobject,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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EelCanvasItem *item;
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g_return_if_fail (EEL_IS_CANVAS_ITEM (gobject));
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item = EEL_CANVAS_ITEM (gobject);
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switch (param_id)
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{
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case ITEM_PROP_VISIBLE:
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{
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if (g_value_get_boolean (value))
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{
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eel_canvas_item_show (item);
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}
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else
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{
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eel_canvas_item_hide (item);
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}
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}
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break;
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default:
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{
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, param_id, pspec);
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}
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break;
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}
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}
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/* Get_property handler for canvas items */
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static void
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eel_canvas_item_get_property (GObject *gobject,
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guint param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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EelCanvasItem *item;
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g_return_if_fail (EEL_IS_CANVAS_ITEM (gobject));
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item = EEL_CANVAS_ITEM (gobject);
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switch (param_id)
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{
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case ITEM_PROP_VISIBLE:
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{
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g_value_set_boolean (value, item->flags & EEL_CANVAS_ITEM_VISIBLE);
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}
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break;
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default:
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{
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, param_id, pspec);
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}
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break;
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}
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}
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static void
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redraw_and_repick_if_mapped (EelCanvasItem *item)
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{
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if (item->flags & EEL_CANVAS_ITEM_MAPPED)
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{
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eel_canvas_item_request_redraw (item);
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item->canvas->need_repick = TRUE;
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}
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}
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/* Dispose handler for canvas items */
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static void
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eel_canvas_item_dispose (GObject *object)
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{
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EelCanvasItem *item;
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g_return_if_fail (EEL_IS_CANVAS_ITEM (object));
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item = EEL_CANVAS_ITEM (object);
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if (item->canvas)
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{
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eel_canvas_item_request_redraw (item);
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/* Make the canvas forget about us */
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if (item == item->canvas->current_item)
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{
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item->canvas->current_item = NULL;
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item->canvas->need_repick = TRUE;
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}
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if (item == item->canvas->new_current_item)
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{
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item->canvas->new_current_item = NULL;
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item->canvas->need_repick = TRUE;
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}
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eel_canvas_item_ungrab (item);
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if (item == item->canvas->focused_item)
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{
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item->canvas->focused_item = NULL;
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}
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/* Normal destroy stuff */
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if (item->flags & EEL_CANVAS_ITEM_MAPPED)
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{
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(*EEL_CANVAS_ITEM_GET_CLASS (item)->unmap)(item);
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}
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if (item->flags & EEL_CANVAS_ITEM_REALIZED)
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{
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(*EEL_CANVAS_ITEM_GET_CLASS (item)->unrealize)(item);
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}
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if (item->parent)
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{
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group_remove (EEL_CANVAS_GROUP (item->parent), item);
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}
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item->canvas = NULL;
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}
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g_object_set_data (object, "in-destruction", GINT_TO_POINTER (1));
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g_signal_emit (object, item_signals[ITEM_DESTROY], 0);
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g_object_set_data (object, "in-destruction", NULL);
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G_OBJECT_CLASS (item_parent_class)->dispose (object);
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}
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void
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eel_canvas_item_destroy (EelCanvasItem *item)
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{
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if (g_object_get_data (G_OBJECT (item), "in-destruction") == NULL)
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{
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g_object_run_dispose (G_OBJECT (item));
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}
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}
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/* Realize handler for canvas items */
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static void
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eel_canvas_item_realize (EelCanvasItem *item)
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{
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if (item->parent && !(item->parent->flags & EEL_CANVAS_ITEM_REALIZED))
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{
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(*EEL_CANVAS_ITEM_GET_CLASS (item->parent)->realize)(item->parent);
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}
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if (item->parent == NULL && !gtk_widget_get_realized (GTK_WIDGET (item->canvas)))
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{
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gtk_widget_realize (GTK_WIDGET (item->canvas));
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}
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item->flags |= EEL_CANVAS_ITEM_REALIZED;
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eel_canvas_item_request_update (item);
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}
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/* Unrealize handler for canvas items */
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static void
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eel_canvas_item_unrealize (EelCanvasItem *item)
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{
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if (item->flags & EEL_CANVAS_ITEM_MAPPED)
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{
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(*EEL_CANVAS_ITEM_GET_CLASS (item)->unmap)(item);
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}
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item->flags &= ~(EEL_CANVAS_ITEM_REALIZED);
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}
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/* Map handler for canvas items */
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static void
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eel_canvas_item_map (EelCanvasItem *item)
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{
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item->flags |= EEL_CANVAS_ITEM_MAPPED;
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}
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/* Unmap handler for canvas items */
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static void
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eel_canvas_item_unmap (EelCanvasItem *item)
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{
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item->flags &= ~(EEL_CANVAS_ITEM_MAPPED);
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}
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/* Update handler for canvas items */
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static void
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eel_canvas_item_update (EelCanvasItem *item,
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double i2w_dx,
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double i2w_dy,
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int flags)
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{
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item->flags &= ~(EEL_CANVAS_ITEM_NEED_UPDATE);
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item->flags &= ~(EEL_CANVAS_ITEM_NEED_DEEP_UPDATE);
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}
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/*
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* This routine invokes the update method of the item
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* Please notice, that we take parent to canvas pixel matrix as argument
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* unlike virtual method ::update, whose argument is item 2 canvas pixel
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* matrix
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*
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* I will try to force somewhat meaningful naming for affines (Lauris)
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* General naming rule is FROM2TO, where FROM and TO are abbreviations
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* So p2cpx is Parent2CanvasPixel and i2cpx is Item2CanvasPixel
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* I hope that this helps to keep track of what really happens
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*
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*/
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static void
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eel_canvas_item_invoke_update (EelCanvasItem *item,
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double i2w_dx,
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double i2w_dy,
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int flags)
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{
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int child_flags;
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child_flags = flags;
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/* apply object flags to child flags */
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child_flags &= ~EEL_CANVAS_UPDATE_REQUESTED;
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if (item->flags & EEL_CANVAS_ITEM_NEED_UPDATE)
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{
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child_flags |= EEL_CANVAS_UPDATE_REQUESTED;
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}
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if (item->flags & EEL_CANVAS_ITEM_NEED_DEEP_UPDATE)
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{
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child_flags |= EEL_CANVAS_UPDATE_DEEP;
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}
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if (child_flags & GCI_UPDATE_MASK)
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{
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if (EEL_CANVAS_ITEM_GET_CLASS (item)->update)
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{
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EEL_CANVAS_ITEM_GET_CLASS (item)->update (item, i2w_dx, i2w_dy, child_flags);
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}
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}
|
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/* If this fail you probably forgot to chain up to
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* EelCanvasItem::update from a derived class */
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g_return_if_fail (!(item->flags & EEL_CANVAS_ITEM_NEED_UPDATE));
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}
|
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|
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/*
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* This routine invokes the point method of the item.
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* The arguments x, y should be in the parent item local coordinates.
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*/
|
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static double
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eel_canvas_item_invoke_point (EelCanvasItem *item,
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double x,
|
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double y,
|
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int cx,
|
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int cy,
|
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EelCanvasItem **actual_item)
|
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{
|
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/* Calculate x & y in item local coordinates */
|
|
|
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if (EEL_CANVAS_ITEM_GET_CLASS (item)->point)
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{
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return EEL_CANVAS_ITEM_GET_CLASS (item)->point (item, x, y, cx, cy, actual_item);
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}
|
|
|
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return 1e18;
|
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}
|
|
|
|
/**
|
|
* eel_canvas_item_set:
|
|
* @item: A canvas item.
|
|
* @first_arg_name: The list of object argument name/value pairs used to configure the item.
|
|
* @Varargs:
|
|
*
|
|
* Configures a canvas item. The arguments in the item are set to the specified
|
|
* values, and the item is repainted as appropriate.
|
|
**/
|
|
void
|
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eel_canvas_item_set (EelCanvasItem *item,
|
|
const gchar *first_arg_name,
|
|
...)
|
|
{
|
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va_list args;
|
|
|
|
va_start (args, first_arg_name);
|
|
g_object_set_valist (G_OBJECT (item), first_arg_name, args);
|
|
va_end (args);
|
|
|
|
item->canvas->need_repick = TRUE;
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_move:
|
|
* @item: A canvas item.
|
|
* @dx: Horizontal offset.
|
|
* @dy: Vertical offset.
|
|
*
|
|
* Moves a canvas item by creating an affine transformation matrix for
|
|
* translation by using the specified values. This happens in item
|
|
* local coordinate system, so if you have nontrivial transform, it
|
|
* most probably does not do, what you want.
|
|
**/
|
|
void
|
|
eel_canvas_item_move (EelCanvasItem *item,
|
|
double dx,
|
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double dy)
|
|
{
|
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g_return_if_fail (item != NULL);
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (!EEL_CANVAS_ITEM_GET_CLASS (item)->translate)
|
|
{
|
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g_warning ("Item type %s does not implement translate method.\n",
|
|
g_type_name (G_OBJECT_TYPE (item)));
|
|
return;
|
|
}
|
|
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->translate)(item, dx, dy);
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_MAPPED)
|
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{
|
|
item->canvas->need_repick = TRUE;
|
|
}
|
|
|
|
if (!(item->flags & EEL_CANVAS_ITEM_NEED_DEEP_UPDATE))
|
|
{
|
|
item->flags |= EEL_CANVAS_ITEM_NEED_DEEP_UPDATE;
|
|
if (item->parent != NULL)
|
|
{
|
|
eel_canvas_item_request_update (item->parent);
|
|
}
|
|
else
|
|
{
|
|
eel_canvas_request_update (item->canvas);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
eel_canvas_queue_resize (EelCanvas *canvas)
|
|
{
|
|
if (gtk_widget_is_drawable (GTK_WIDGET (canvas)))
|
|
{
|
|
gtk_widget_queue_resize (GTK_WIDGET (canvas));
|
|
}
|
|
}
|
|
|
|
/* Convenience function to reorder items in a group's child list. This puts the
|
|
* specified link after the "before" link. Returns TRUE if the list was changed.
|
|
*/
|
|
static gboolean
|
|
put_item_after (GList *link,
|
|
GList *before)
|
|
{
|
|
EelCanvasGroup *parent;
|
|
|
|
if (link == before)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
parent = EEL_CANVAS_GROUP (EEL_CANVAS_ITEM (link->data)->parent);
|
|
|
|
if (before == NULL)
|
|
{
|
|
if (link == parent->item_list)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
link->prev->next = link->next;
|
|
|
|
if (link->next)
|
|
{
|
|
link->next->prev = link->prev;
|
|
}
|
|
else
|
|
{
|
|
parent->item_list_end = link->prev;
|
|
}
|
|
|
|
link->prev = before;
|
|
link->next = parent->item_list;
|
|
link->next->prev = link;
|
|
parent->item_list = link;
|
|
}
|
|
else
|
|
{
|
|
if ((link == parent->item_list_end) && (before == parent->item_list_end->prev))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if (link->next)
|
|
{
|
|
link->next->prev = link->prev;
|
|
}
|
|
|
|
if (link->prev)
|
|
{
|
|
link->prev->next = link->next;
|
|
}
|
|
else
|
|
{
|
|
parent->item_list = link->next;
|
|
parent->item_list->prev = NULL;
|
|
}
|
|
|
|
link->prev = before;
|
|
link->next = before->next;
|
|
|
|
link->prev->next = link;
|
|
|
|
if (link->next)
|
|
{
|
|
link->next->prev = link;
|
|
}
|
|
else
|
|
{
|
|
parent->item_list_end = link;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_raise:
|
|
* @item: A canvas item.
|
|
* @positions: Number of steps to raise the item.
|
|
*
|
|
* Raises the item in its parent's stack by the specified number of positions.
|
|
* If the number of positions is greater than the distance to the top of the
|
|
* stack, then the item is put at the top.
|
|
**/
|
|
void
|
|
eel_canvas_item_raise (EelCanvasItem *item,
|
|
int positions)
|
|
{
|
|
GList *link, *before;
|
|
EelCanvasGroup *parent;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
g_return_if_fail (positions >= 0);
|
|
|
|
if (!item->parent || positions == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
parent = EEL_CANVAS_GROUP (item->parent);
|
|
link = g_list_find (parent->item_list, item);
|
|
g_assert (link != NULL);
|
|
|
|
for (before = link; positions && before; positions--)
|
|
{
|
|
before = before->next;
|
|
}
|
|
|
|
if (!before)
|
|
{
|
|
before = parent->item_list_end;
|
|
}
|
|
|
|
if (put_item_after (link, before))
|
|
{
|
|
redraw_and_repick_if_mapped (item);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_lower:
|
|
* @item: A canvas item.
|
|
* @positions: Number of steps to lower the item.
|
|
*
|
|
* Lowers the item in its parent's stack by the specified number of positions.
|
|
* If the number of positions is greater than the distance to the bottom of the
|
|
* stack, then the item is put at the bottom.
|
|
**/
|
|
void
|
|
eel_canvas_item_lower (EelCanvasItem *item,
|
|
int positions)
|
|
{
|
|
GList *link, *before;
|
|
EelCanvasGroup *parent;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
g_return_if_fail (positions >= 1);
|
|
|
|
if (!item->parent || positions == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
parent = EEL_CANVAS_GROUP (item->parent);
|
|
link = g_list_find (parent->item_list, item);
|
|
g_assert (link != NULL);
|
|
|
|
if (link->prev)
|
|
{
|
|
for (before = link->prev; positions && before; positions--)
|
|
{
|
|
before = before->prev;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
before = NULL;
|
|
}
|
|
|
|
if (put_item_after (link, before))
|
|
{
|
|
redraw_and_repick_if_mapped (item);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_raise_to_top:
|
|
* @item: A canvas item.
|
|
*
|
|
* Raises an item to the top of its parent's stack.
|
|
**/
|
|
void
|
|
eel_canvas_item_raise_to_top (EelCanvasItem *item)
|
|
{
|
|
GList *link;
|
|
EelCanvasGroup *parent;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (!item->parent)
|
|
{
|
|
return;
|
|
}
|
|
|
|
parent = EEL_CANVAS_GROUP (item->parent);
|
|
link = g_list_find (parent->item_list, item);
|
|
g_assert (link != NULL);
|
|
|
|
if (put_item_after (link, parent->item_list_end))
|
|
{
|
|
redraw_and_repick_if_mapped (item);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_lower_to_bottom:
|
|
* @item: A canvas item.
|
|
*
|
|
* Lowers an item to the bottom of its parent's stack.
|
|
**/
|
|
void
|
|
eel_canvas_item_lower_to_bottom (EelCanvasItem *item)
|
|
{
|
|
GList *link;
|
|
EelCanvasGroup *parent;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (!item->parent)
|
|
{
|
|
return;
|
|
}
|
|
|
|
parent = EEL_CANVAS_GROUP (item->parent);
|
|
link = g_list_find (parent->item_list, item);
|
|
g_assert (link != NULL);
|
|
|
|
if (put_item_after (link, NULL))
|
|
{
|
|
redraw_and_repick_if_mapped (item);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_send_behind:
|
|
* @item: A canvas item.
|
|
* @behind_item: The canvas item to put item behind, or NULL
|
|
*
|
|
* Moves item to a in the position in the stacking order so that
|
|
* it is placed immediately below behind_item, or at the top if
|
|
* behind_item is NULL.
|
|
**/
|
|
void
|
|
eel_canvas_item_send_behind (EelCanvasItem *item,
|
|
EelCanvasItem *behind_item)
|
|
{
|
|
GList *item_list;
|
|
int item_position, behind_position;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (behind_item == NULL)
|
|
{
|
|
eel_canvas_item_raise_to_top (item);
|
|
return;
|
|
}
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (behind_item));
|
|
g_return_if_fail (item->parent == behind_item->parent);
|
|
|
|
item_list = EEL_CANVAS_GROUP (item->parent)->item_list;
|
|
|
|
item_position = g_list_index (item_list, item);
|
|
g_assert (item_position != -1);
|
|
behind_position = g_list_index (item_list, behind_item);
|
|
g_assert (behind_position != -1);
|
|
g_assert (item_position != behind_position);
|
|
|
|
if (item_position == behind_position - 1)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (item_position < behind_position)
|
|
{
|
|
eel_canvas_item_raise (item, (behind_position - 1) - item_position);
|
|
}
|
|
else
|
|
{
|
|
eel_canvas_item_lower (item, item_position - behind_position);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_show:
|
|
* @item: A canvas item.
|
|
*
|
|
* Shows a canvas item. If the item was already shown, then no action is taken.
|
|
**/
|
|
void
|
|
eel_canvas_item_show (EelCanvasItem *item)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (!(item->flags & EEL_CANVAS_ITEM_VISIBLE))
|
|
{
|
|
item->flags |= EEL_CANVAS_ITEM_VISIBLE;
|
|
|
|
if (!(item->flags & EEL_CANVAS_ITEM_REALIZED))
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->realize)(item);
|
|
}
|
|
|
|
if (item->parent != NULL)
|
|
{
|
|
if (!(item->flags & EEL_CANVAS_ITEM_MAPPED) &&
|
|
item->parent->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->map)(item);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!(item->flags & EEL_CANVAS_ITEM_MAPPED) &&
|
|
gtk_widget_get_mapped (GTK_WIDGET (item->canvas)))
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->map)(item);
|
|
}
|
|
}
|
|
|
|
redraw_and_repick_if_mapped (item);
|
|
eel_canvas_queue_resize (item->canvas);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_hide:
|
|
* @item: A canvas item.
|
|
*
|
|
* Hides a canvas item. If the item was already hidden, then no action is
|
|
* taken.
|
|
**/
|
|
void
|
|
eel_canvas_item_hide (EelCanvasItem *item)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_VISIBLE)
|
|
{
|
|
item->flags &= ~EEL_CANVAS_ITEM_VISIBLE;
|
|
|
|
redraw_and_repick_if_mapped (item);
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->unmap)(item);
|
|
}
|
|
|
|
eel_canvas_queue_resize (item->canvas);
|
|
|
|
/* No need to unrealize when we just want to hide */
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Prepare the window for grabbing, i.e. show it.
|
|
*/
|
|
static void
|
|
seat_grab_prepare_window (GdkSeat *seat,
|
|
GdkWindow *window,
|
|
gpointer user_data)
|
|
{
|
|
gdk_window_show (window);
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_grab:
|
|
* @item: A canvas item.
|
|
* @event_mask: Mask of events that will be sent to this item.
|
|
* @cursor: If non-NULL, the cursor that will be used while the grab is active.
|
|
* @event: The event, triggering the grab, if any.
|
|
*
|
|
* Specifies that all events that match the specified event mask should be sent
|
|
* to the specified item, and also grabs the seat by calling gdk_seat_grab().
|
|
* If @cursor is not NULL, then that cursor is used while the grab is active.
|
|
*
|
|
* Return value: If an item was already grabbed, it returns %GDK_GRAB_ALREADY_GRABBED. If
|
|
* the specified item was hidden by calling eel_canvas_item_hide(), then it
|
|
* returns %GDK_GRAB_NOT_VIEWABLE. Else, it returns the result of calling
|
|
* gdk_seat_grab().
|
|
**/
|
|
GdkGrabStatus
|
|
eel_canvas_item_grab (EelCanvasItem *item,
|
|
GdkEventMask event_mask,
|
|
GdkCursor *cursor,
|
|
const GdkEvent *event)
|
|
{
|
|
GdkGrabStatus retval;
|
|
GdkDisplay *display;
|
|
GdkSeat *seat;
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS_ITEM (item), GDK_GRAB_NOT_VIEWABLE);
|
|
g_return_val_if_fail (gtk_widget_get_mapped (GTK_WIDGET (item->canvas)),
|
|
GDK_GRAB_NOT_VIEWABLE);
|
|
|
|
if (item->canvas->grabbed_item)
|
|
{
|
|
return GDK_GRAB_ALREADY_GRABBED;
|
|
}
|
|
|
|
if (!(item->flags & EEL_CANVAS_ITEM_MAPPED))
|
|
{
|
|
return GDK_GRAB_NOT_VIEWABLE;
|
|
}
|
|
|
|
display = gtk_widget_get_display (GTK_WIDGET (item->canvas));
|
|
seat = gdk_display_get_default_seat (display);
|
|
|
|
retval = gdk_seat_grab (seat,
|
|
gtk_layout_get_bin_window (GTK_LAYOUT (item->canvas)),
|
|
GDK_SEAT_CAPABILITY_ALL_POINTING,
|
|
FALSE,
|
|
cursor,
|
|
event,
|
|
seat_grab_prepare_window,
|
|
NULL);
|
|
|
|
if (retval != GDK_GRAB_SUCCESS)
|
|
{
|
|
return retval;
|
|
}
|
|
|
|
item->canvas->grabbed_item = item;
|
|
item->canvas->grabbed_event_mask = event_mask;
|
|
item->canvas->current_item = item; /* So that events go to the grabbed item */
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_ungrab:
|
|
* @item: A canvas item that holds a grab.
|
|
*
|
|
* Ungrabs the item, which must have been grabbed in the canvas, and ungrabs the
|
|
* seat.
|
|
**/
|
|
void
|
|
eel_canvas_item_ungrab (EelCanvasItem *item)
|
|
{
|
|
GdkDisplay *display;
|
|
GdkSeat *seat;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
if (item->canvas->grabbed_item != item)
|
|
{
|
|
return;
|
|
}
|
|
|
|
display = gtk_widget_get_display (GTK_WIDGET (item->canvas));
|
|
seat = gdk_display_get_default_seat (display);
|
|
|
|
item->canvas->grabbed_item = NULL;
|
|
gdk_seat_ungrab (seat);
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_i2w:
|
|
* @item: A canvas item.
|
|
* @x: X coordinate to convert (input/output value).
|
|
* @y: Y coordinate to convert (input/output value).
|
|
*
|
|
* Converts a coordinate pair from item-relative coordinates to world
|
|
* coordinates.
|
|
**/
|
|
void
|
|
eel_canvas_item_i2w (EelCanvasItem *item,
|
|
double *x,
|
|
double *y)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
g_return_if_fail (x != NULL);
|
|
g_return_if_fail (y != NULL);
|
|
|
|
item = item->parent;
|
|
while (item)
|
|
{
|
|
if (EEL_IS_CANVAS_GROUP (item))
|
|
{
|
|
*x += EEL_CANVAS_GROUP (item)->xpos;
|
|
*y += EEL_CANVAS_GROUP (item)->ypos;
|
|
}
|
|
|
|
item = item->parent;
|
|
}
|
|
}
|
|
|
|
/* Returns whether the item is an inferior of or is equal to the parent. */
|
|
static int
|
|
is_descendant (EelCanvasItem *item,
|
|
EelCanvasItem *parent)
|
|
{
|
|
for (; item; item = item->parent)
|
|
{
|
|
if (item == parent)
|
|
{
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_grab_focus:
|
|
* @item: A canvas item.
|
|
*
|
|
* Makes the specified item take the keyboard focus, so all keyboard events will
|
|
* be sent to it. If the canvas widget itself did not have the focus, it grabs
|
|
* it as well.
|
|
**/
|
|
static void
|
|
eel_canvas_item_grab_focus (EelCanvasItem *item)
|
|
{
|
|
EelCanvasItem *focused_item;
|
|
GdkEvent ev;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
g_return_if_fail (gtk_widget_get_can_focus (GTK_WIDGET (item->canvas)));
|
|
|
|
focused_item = item->canvas->focused_item;
|
|
|
|
if (focused_item)
|
|
{
|
|
ev.focus_change.type = GDK_FOCUS_CHANGE;
|
|
ev.focus_change.window = gtk_layout_get_bin_window (GTK_LAYOUT (item->canvas));
|
|
ev.focus_change.send_event = FALSE;
|
|
ev.focus_change.in = FALSE;
|
|
|
|
emit_event (item->canvas, &ev);
|
|
}
|
|
|
|
item->canvas->focused_item = item;
|
|
gtk_widget_grab_focus (GTK_WIDGET (item->canvas));
|
|
|
|
if (focused_item)
|
|
{
|
|
ev.focus_change.type = GDK_FOCUS_CHANGE;
|
|
ev.focus_change.window = gtk_layout_get_bin_window (GTK_LAYOUT (item->canvas));
|
|
ev.focus_change.send_event = FALSE;
|
|
ev.focus_change.in = TRUE;
|
|
|
|
emit_event (item->canvas, &ev);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_get_bounds:
|
|
* @item: A canvas item.
|
|
* @x1: Leftmost edge of the bounding box (return value).
|
|
* @y1: Upper edge of the bounding box (return value).
|
|
* @x2: Rightmost edge of the bounding box (return value).
|
|
* @y2: Lower edge of the bounding box (return value).
|
|
*
|
|
* Queries the bounding box of a canvas item. The bounds are returned in the
|
|
* coordinate system of the item's parent.
|
|
**/
|
|
void
|
|
eel_canvas_item_get_bounds (EelCanvasItem *item,
|
|
double *x1,
|
|
double *y1,
|
|
double *x2,
|
|
double *y2)
|
|
{
|
|
double tx1, ty1, tx2, ty2;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
tx1 = ty1 = tx2 = ty2 = 0.0;
|
|
|
|
/* Get the item's bounds in its coordinate system */
|
|
|
|
if (EEL_CANVAS_ITEM_GET_CLASS (item)->bounds)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->bounds)(item, &tx1, &ty1, &tx2, &ty2);
|
|
}
|
|
|
|
/* Return the values */
|
|
|
|
if (x1)
|
|
{
|
|
*x1 = tx1;
|
|
}
|
|
|
|
if (y1)
|
|
{
|
|
*y1 = ty1;
|
|
}
|
|
|
|
if (x2)
|
|
{
|
|
*x2 = tx2;
|
|
}
|
|
|
|
if (y2)
|
|
{
|
|
*y2 = ty2;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_item_request_update
|
|
* @item: A canvas item.
|
|
*
|
|
* To be used only by item implementations. Requests that the canvas queue an
|
|
* update for the specified item.
|
|
**/
|
|
void
|
|
eel_canvas_item_request_update (EelCanvasItem *item)
|
|
{
|
|
if (NULL == item->canvas)
|
|
{
|
|
return;
|
|
}
|
|
|
|
g_return_if_fail (!item->canvas->doing_update);
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_NEED_UPDATE)
|
|
{
|
|
return;
|
|
}
|
|
|
|
item->flags |= EEL_CANVAS_ITEM_NEED_UPDATE;
|
|
|
|
if (item->parent != NULL)
|
|
{
|
|
/* Recurse up the tree */
|
|
eel_canvas_item_request_update (item->parent);
|
|
}
|
|
else
|
|
{
|
|
/* Have reached the top of the tree, make sure the update call gets scheduled. */
|
|
eel_canvas_request_update (item->canvas);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_item_request_update
|
|
* @item: A canvas item.
|
|
*
|
|
* Convenience function that informs a canvas that the specified item needs
|
|
* to be repainted. To be used by item implementations
|
|
**/
|
|
void
|
|
eel_canvas_item_request_redraw (EelCanvasItem *item)
|
|
{
|
|
if (item->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
eel_canvas_request_redraw (item->canvas,
|
|
item->x1, item->y1,
|
|
item->x2 + 1, item->y2 + 1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*** EelCanvasGroup ***/
|
|
|
|
|
|
enum
|
|
{
|
|
GROUP_PROP_0,
|
|
GROUP_PROP_X,
|
|
GROUP_PROP_Y
|
|
};
|
|
|
|
|
|
static void eel_canvas_group_class_init (EelCanvasGroupClass *klass);
|
|
static void eel_canvas_group_init (EelCanvasGroup *group);
|
|
static void eel_canvas_group_set_property (GObject *object,
|
|
guint param_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec);
|
|
static void eel_canvas_group_get_property (GObject *object,
|
|
guint param_id,
|
|
GValue *value,
|
|
GParamSpec *pspec);
|
|
|
|
static void eel_canvas_group_destroy (EelCanvasItem *object);
|
|
|
|
static void eel_canvas_group_update (EelCanvasItem *item,
|
|
double i2w_dx,
|
|
double i2w_dy,
|
|
int flags);
|
|
static void eel_canvas_group_unrealize (EelCanvasItem *item);
|
|
static void eel_canvas_group_map (EelCanvasItem *item);
|
|
static void eel_canvas_group_unmap (EelCanvasItem *item);
|
|
static void eel_canvas_group_draw (EelCanvasItem *item,
|
|
cairo_t *cr,
|
|
cairo_region_t *region);
|
|
static double eel_canvas_group_point (EelCanvasItem *item,
|
|
double x,
|
|
double y,
|
|
int cx,
|
|
int cy,
|
|
EelCanvasItem **actual_item);
|
|
static void eel_canvas_group_translate (EelCanvasItem *item,
|
|
double dx,
|
|
double dy);
|
|
static void eel_canvas_group_bounds (EelCanvasItem *item,
|
|
double *x1,
|
|
double *y1,
|
|
double *x2,
|
|
double *y2);
|
|
|
|
|
|
static EelCanvasItemClass *group_parent_class;
|
|
|
|
|
|
/**
|
|
* eel_canvas_group_get_type:
|
|
*
|
|
* Registers the &EelCanvasGroup class if necessary, and returns the type ID
|
|
* associated to it.
|
|
*
|
|
* Return value: The type ID of the &EelCanvasGroup class.
|
|
**/
|
|
GType
|
|
eel_canvas_group_get_type (void)
|
|
{
|
|
static GType group_type = 0;
|
|
|
|
if (!group_type)
|
|
{
|
|
static const GTypeInfo group_info =
|
|
{
|
|
sizeof (EelCanvasGroupClass),
|
|
(GBaseInitFunc) NULL,
|
|
(GBaseFinalizeFunc) NULL,
|
|
(GClassInitFunc) eel_canvas_group_class_init,
|
|
NULL, /* class_finalize */
|
|
NULL, /* class_data */
|
|
sizeof (EelCanvasGroup),
|
|
0, /* n_preallocs */
|
|
(GInstanceInitFunc) eel_canvas_group_init
|
|
};
|
|
|
|
group_type = g_type_register_static (eel_canvas_item_get_type (),
|
|
"EelCanvasGroup",
|
|
&group_info,
|
|
0);
|
|
}
|
|
|
|
return group_type;
|
|
}
|
|
|
|
/* Class initialization function for EelCanvasGroupClass */
|
|
static void
|
|
eel_canvas_group_class_init (EelCanvasGroupClass *klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
EelCanvasItemClass *item_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
item_class = (EelCanvasItemClass *) klass;
|
|
|
|
group_parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->set_property = eel_canvas_group_set_property;
|
|
gobject_class->get_property = eel_canvas_group_get_property;
|
|
|
|
g_object_class_install_property
|
|
(gobject_class, GROUP_PROP_X,
|
|
g_param_spec_double ("x",
|
|
_("X"),
|
|
_("X"),
|
|
-G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
|
|
G_PARAM_READWRITE));
|
|
g_object_class_install_property
|
|
(gobject_class, GROUP_PROP_Y,
|
|
g_param_spec_double ("y",
|
|
_("Y"),
|
|
_("Y"),
|
|
-G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
|
|
G_PARAM_READWRITE));
|
|
|
|
item_class->destroy = eel_canvas_group_destroy;
|
|
item_class->update = eel_canvas_group_update;
|
|
item_class->unrealize = eel_canvas_group_unrealize;
|
|
item_class->map = eel_canvas_group_map;
|
|
item_class->unmap = eel_canvas_group_unmap;
|
|
item_class->draw = eel_canvas_group_draw;
|
|
item_class->point = eel_canvas_group_point;
|
|
item_class->translate = eel_canvas_group_translate;
|
|
item_class->bounds = eel_canvas_group_bounds;
|
|
}
|
|
|
|
/* Object initialization function for EelCanvasGroup */
|
|
static void
|
|
eel_canvas_group_init (EelCanvasGroup *group)
|
|
{
|
|
group->xpos = 0.0;
|
|
group->ypos = 0.0;
|
|
}
|
|
|
|
/* Set_property handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_set_property (GObject *gobject,
|
|
guint param_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
EelCanvasItem *item;
|
|
EelCanvasGroup *group;
|
|
double old;
|
|
gboolean moved;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_GROUP (gobject));
|
|
|
|
item = EEL_CANVAS_ITEM (gobject);
|
|
group = EEL_CANVAS_GROUP (gobject);
|
|
|
|
moved = FALSE;
|
|
switch (param_id)
|
|
{
|
|
case GROUP_PROP_X:
|
|
{
|
|
old = group->xpos;
|
|
group->xpos = g_value_get_double (value);
|
|
if (old != group->xpos)
|
|
{
|
|
moved = TRUE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GROUP_PROP_Y:
|
|
{
|
|
old = group->ypos;
|
|
group->ypos = g_value_get_double (value);
|
|
if (old != group->ypos)
|
|
{
|
|
moved = TRUE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, param_id, pspec);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (moved)
|
|
{
|
|
item->flags |= EEL_CANVAS_ITEM_NEED_DEEP_UPDATE;
|
|
if (item->parent != NULL)
|
|
{
|
|
eel_canvas_item_request_update (item->parent);
|
|
}
|
|
else
|
|
{
|
|
eel_canvas_request_update (item->canvas);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Get_property handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_get_property (GObject *gobject,
|
|
guint param_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
EelCanvasGroup *group;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_GROUP (gobject));
|
|
|
|
group = EEL_CANVAS_GROUP (gobject);
|
|
|
|
switch (param_id)
|
|
{
|
|
case GROUP_PROP_X:
|
|
{
|
|
g_value_set_double (value, group->xpos);
|
|
}
|
|
break;
|
|
|
|
case GROUP_PROP_Y:
|
|
{
|
|
g_value_set_double (value, group->ypos);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, param_id, pspec);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Destroy handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_destroy (EelCanvasItem *object)
|
|
{
|
|
EelCanvasGroup *group;
|
|
EelCanvasItem *child;
|
|
GList *list;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_GROUP (object));
|
|
|
|
group = EEL_CANVAS_GROUP (object);
|
|
|
|
list = group->item_list;
|
|
while (list)
|
|
{
|
|
child = list->data;
|
|
list = list->next;
|
|
|
|
eel_canvas_item_destroy (child);
|
|
}
|
|
|
|
if (EEL_CANVAS_ITEM_CLASS (group_parent_class)->destroy)
|
|
{
|
|
(*EEL_CANVAS_ITEM_CLASS (group_parent_class)->destroy)(object);
|
|
}
|
|
}
|
|
|
|
/* Update handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_update (EelCanvasItem *item,
|
|
double i2w_dx,
|
|
double i2w_dy,
|
|
int flags)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *i;
|
|
double bbox_x0, bbox_y0, bbox_x1, bbox_y1;
|
|
gboolean first = TRUE;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
(*group_parent_class->update)(item, i2w_dx, i2w_dy, flags);
|
|
|
|
bbox_x0 = 0;
|
|
bbox_y0 = 0;
|
|
bbox_x1 = 0;
|
|
bbox_y1 = 0;
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
i = list->data;
|
|
|
|
eel_canvas_item_invoke_update (i, i2w_dx + group->xpos, i2w_dy + group->ypos, flags);
|
|
|
|
if (first)
|
|
{
|
|
first = FALSE;
|
|
bbox_x0 = i->x1;
|
|
bbox_y0 = i->y1;
|
|
bbox_x1 = i->x2;
|
|
bbox_y1 = i->y2;
|
|
}
|
|
else
|
|
{
|
|
bbox_x0 = MIN (bbox_x0, i->x1);
|
|
bbox_y0 = MIN (bbox_y0, i->y1);
|
|
bbox_x1 = MAX (bbox_x1, i->x2);
|
|
bbox_y1 = MAX (bbox_y1, i->y2);
|
|
}
|
|
}
|
|
item->x1 = bbox_x0;
|
|
item->y1 = bbox_y0;
|
|
item->x2 = bbox_x1;
|
|
item->y2 = bbox_y1;
|
|
}
|
|
|
|
/* Unrealize handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_unrealize (EelCanvasItem *item)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *i;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
/* Unmap group before children to avoid flash */
|
|
if (item->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->unmap)(item);
|
|
}
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
i = list->data;
|
|
|
|
if (i->flags & EEL_CANVAS_ITEM_REALIZED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (i)->unrealize)(i);
|
|
}
|
|
}
|
|
|
|
(*group_parent_class->unrealize)(item);
|
|
}
|
|
|
|
/* Map handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_map (EelCanvasItem *item)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *i;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
i = list->data;
|
|
|
|
if (i->flags & EEL_CANVAS_ITEM_VISIBLE &&
|
|
!(i->flags & EEL_CANVAS_ITEM_MAPPED))
|
|
{
|
|
if (!(i->flags & EEL_CANVAS_ITEM_REALIZED))
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (i)->realize)(i);
|
|
}
|
|
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (i)->map)(i);
|
|
}
|
|
}
|
|
|
|
(*group_parent_class->map)(item);
|
|
}
|
|
|
|
/* Unmap handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_unmap (EelCanvasItem *item)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *i;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
i = list->data;
|
|
|
|
if (i->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (i)->unmap)(i);
|
|
}
|
|
}
|
|
|
|
(*group_parent_class->unmap)(item);
|
|
}
|
|
|
|
/* Draw handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_draw (EelCanvasItem *item,
|
|
cairo_t *cr,
|
|
cairo_region_t *region)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *child = NULL;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
child = list->data;
|
|
|
|
if ((child->flags & EEL_CANVAS_ITEM_MAPPED) &&
|
|
(EEL_CANVAS_ITEM_GET_CLASS (child)->draw))
|
|
{
|
|
GdkRectangle child_rect;
|
|
|
|
child_rect.x = child->x1;
|
|
child_rect.y = child->y1;
|
|
child_rect.width = child->x2 - child->x1 + 1;
|
|
child_rect.height = child->y2 - child->y1 + 1;
|
|
|
|
if (cairo_region_contains_rectangle (region, &child_rect) != CAIRO_REGION_OVERLAP_OUT)
|
|
{
|
|
EEL_CANVAS_ITEM_GET_CLASS (child)->draw (child, cr, region);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Point handler for canvas groups */
|
|
static double
|
|
eel_canvas_group_point (EelCanvasItem *item,
|
|
double x,
|
|
double y,
|
|
int cx,
|
|
int cy,
|
|
EelCanvasItem **actual_item)
|
|
{
|
|
EelCanvasGroup *group;
|
|
GList *list;
|
|
EelCanvasItem *child, *point_item;
|
|
int x1, y1, x2, y2;
|
|
double gx, gy;
|
|
double dist, best;
|
|
int has_point;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
x1 = cx - item->canvas->close_enough;
|
|
y1 = cy - item->canvas->close_enough;
|
|
x2 = cx + item->canvas->close_enough;
|
|
y2 = cy + item->canvas->close_enough;
|
|
|
|
best = 0.0;
|
|
*actual_item = NULL;
|
|
|
|
gx = x - group->xpos;
|
|
gy = y - group->ypos;
|
|
|
|
dist = 0.0; /* keep gcc happy */
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
child = list->data;
|
|
|
|
if ((child->x1 > x2) || (child->y1 > y2) || (child->x2 < x1) || (child->y2 < y1))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
point_item = NULL; /* cater for incomplete item implementations */
|
|
|
|
if ((child->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
&& EEL_CANVAS_ITEM_GET_CLASS (child)->point)
|
|
{
|
|
dist = eel_canvas_item_invoke_point (child, gx, gy, cx, cy, &point_item);
|
|
has_point = TRUE;
|
|
}
|
|
else
|
|
{
|
|
has_point = FALSE;
|
|
}
|
|
|
|
if (has_point
|
|
&& point_item
|
|
&& ((int) (dist * item->canvas->pixels_per_unit + 0.5)
|
|
<= item->canvas->close_enough))
|
|
{
|
|
best = dist;
|
|
*actual_item = point_item;
|
|
}
|
|
}
|
|
|
|
return best;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_group_translate (EelCanvasItem *item,
|
|
double dx,
|
|
double dy)
|
|
{
|
|
EelCanvasGroup *group;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
group->xpos += dx;
|
|
group->ypos += dy;
|
|
}
|
|
|
|
/* Bounds handler for canvas groups */
|
|
static void
|
|
eel_canvas_group_bounds (EelCanvasItem *item,
|
|
double *x1,
|
|
double *y1,
|
|
double *x2,
|
|
double *y2)
|
|
{
|
|
EelCanvasGroup *group;
|
|
EelCanvasItem *child;
|
|
GList *list;
|
|
double tx1, ty1, tx2, ty2;
|
|
double minx, miny, maxx, maxy;
|
|
int set;
|
|
|
|
group = EEL_CANVAS_GROUP (item);
|
|
|
|
/* Get the bounds of the first visible item */
|
|
|
|
child = NULL; /* Unnecessary but eliminates a warning. */
|
|
|
|
set = FALSE;
|
|
|
|
for (list = group->item_list; list; list = list->next)
|
|
{
|
|
child = list->data;
|
|
|
|
if (child->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
set = TRUE;
|
|
eel_canvas_item_get_bounds (child, &minx, &miny, &maxx, &maxy);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If there were no visible items, return an empty bounding box */
|
|
|
|
if (!set)
|
|
{
|
|
*x1 = *y1 = *x2 = *y2 = 0.0;
|
|
return;
|
|
}
|
|
|
|
/* Now we can grow the bounds using the rest of the items */
|
|
|
|
list = list->next;
|
|
|
|
for (; list; list = list->next)
|
|
{
|
|
child = list->data;
|
|
|
|
if (!(child->flags & EEL_CANVAS_ITEM_MAPPED))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
eel_canvas_item_get_bounds (child, &tx1, &ty1, &tx2, &ty2);
|
|
|
|
if (tx1 < minx)
|
|
{
|
|
minx = tx1;
|
|
}
|
|
|
|
if (ty1 < miny)
|
|
{
|
|
miny = ty1;
|
|
}
|
|
|
|
if (tx2 > maxx)
|
|
{
|
|
maxx = tx2;
|
|
}
|
|
|
|
if (ty2 > maxy)
|
|
{
|
|
maxy = ty2;
|
|
}
|
|
}
|
|
|
|
/* Make the bounds be relative to our parent's coordinate system */
|
|
|
|
if (item->parent)
|
|
{
|
|
minx += group->xpos;
|
|
miny += group->ypos;
|
|
maxx += group->xpos;
|
|
maxy += group->ypos;
|
|
}
|
|
|
|
*x1 = minx;
|
|
*y1 = miny;
|
|
*x2 = maxx;
|
|
*y2 = maxy;
|
|
}
|
|
|
|
/* Adds an item to a group */
|
|
static void
|
|
group_add (EelCanvasGroup *group,
|
|
EelCanvasItem *item)
|
|
{
|
|
g_object_ref_sink (item);
|
|
|
|
if (!group->item_list)
|
|
{
|
|
group->item_list = g_list_append (group->item_list, item);
|
|
group->item_list_end = group->item_list;
|
|
}
|
|
else
|
|
{
|
|
group->item_list_end = g_list_append (group->item_list_end, item)->next;
|
|
}
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_VISIBLE &&
|
|
group->item.flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
if (!(item->flags & EEL_CANVAS_ITEM_REALIZED))
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->realize)(item);
|
|
}
|
|
|
|
if (!(item->flags & EEL_CANVAS_ITEM_MAPPED))
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->map)(item);
|
|
}
|
|
}
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_VISIBLE)
|
|
{
|
|
eel_canvas_queue_resize (EEL_CANVAS_ITEM (group)->canvas);
|
|
}
|
|
}
|
|
|
|
/* Removes an item from a group */
|
|
static void
|
|
group_remove (EelCanvasGroup *group,
|
|
EelCanvasItem *item)
|
|
{
|
|
GList *children;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS_GROUP (group));
|
|
g_return_if_fail (EEL_IS_CANVAS_ITEM (item));
|
|
|
|
for (children = group->item_list; children; children = children->next)
|
|
{
|
|
if (children->data == item)
|
|
{
|
|
if (item->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->unmap)(item);
|
|
}
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_REALIZED)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (item)->unrealize)(item);
|
|
}
|
|
|
|
if (item->flags & EEL_CANVAS_ITEM_VISIBLE)
|
|
{
|
|
eel_canvas_queue_resize (item->canvas);
|
|
}
|
|
|
|
/* Unparent the child */
|
|
|
|
item->parent = NULL;
|
|
/* item->canvas = NULL; */
|
|
g_object_unref (G_OBJECT (item));
|
|
|
|
/* Remove it from the list */
|
|
|
|
if (children == group->item_list_end)
|
|
{
|
|
group->item_list_end = children->prev;
|
|
}
|
|
|
|
group->item_list = g_list_remove_link (group->item_list, children);
|
|
g_list_free (children);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*** EelCanvas ***/
|
|
|
|
|
|
static void eel_canvas_class_init (EelCanvasClass *klass);
|
|
static void eel_canvas_init (EelCanvas *canvas);
|
|
static void eel_canvas_destroy (GtkWidget *object);
|
|
static void eel_canvas_map (GtkWidget *widget);
|
|
static void eel_canvas_unmap (GtkWidget *widget);
|
|
static void eel_canvas_realize (GtkWidget *widget);
|
|
static void eel_canvas_unrealize (GtkWidget *widget);
|
|
static void eel_canvas_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation);
|
|
static gint eel_canvas_button (GtkWidget *widget,
|
|
GdkEventButton *event);
|
|
static gint eel_canvas_motion (GtkWidget *widget,
|
|
GdkEventMotion *event);
|
|
static gint eel_canvas_draw (GtkWidget *widget,
|
|
cairo_t *cr);
|
|
static gint eel_canvas_key (GtkWidget *widget,
|
|
GdkEventKey *event);
|
|
static gint eel_canvas_crossing (GtkWidget *widget,
|
|
GdkEventCrossing *event);
|
|
static gint eel_canvas_focus_in (GtkWidget *widget,
|
|
GdkEventFocus *event);
|
|
static gint eel_canvas_focus_out (GtkWidget *widget,
|
|
GdkEventFocus *event);
|
|
static void eel_canvas_request_update_real (EelCanvas *canvas);
|
|
static GtkLayoutClass *canvas_parent_class;
|
|
|
|
/**
|
|
* eel_canvas_get_type:
|
|
*
|
|
* Registers the &EelCanvas class if necessary, and returns the type ID
|
|
* associated to it.
|
|
*
|
|
* Return value: The type ID of the &EelCanvas class.
|
|
**/
|
|
GType
|
|
eel_canvas_get_type (void)
|
|
{
|
|
static GType canvas_type = 0;
|
|
|
|
if (!canvas_type)
|
|
{
|
|
static const GTypeInfo canvas_info =
|
|
{
|
|
sizeof (EelCanvasClass),
|
|
(GBaseInitFunc) NULL,
|
|
(GBaseFinalizeFunc) NULL,
|
|
(GClassInitFunc) eel_canvas_class_init,
|
|
NULL, /* class_finalize */
|
|
NULL, /* class_data */
|
|
sizeof (EelCanvas),
|
|
0, /* n_preallocs */
|
|
(GInstanceInitFunc) eel_canvas_init
|
|
};
|
|
|
|
canvas_type = g_type_register_static (gtk_layout_get_type (),
|
|
"EelCanvas",
|
|
&canvas_info,
|
|
0);
|
|
}
|
|
|
|
return canvas_type;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
switch (prop_id)
|
|
{
|
|
default:
|
|
{
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
eel_canvas_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
switch (prop_id)
|
|
{
|
|
default:
|
|
{
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
eel_canvas_accessible_adjustment_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
AtkObject *atk_obj;
|
|
|
|
/* The scrollbars have changed */
|
|
atk_obj = ATK_OBJECT (data);
|
|
|
|
g_signal_emit_by_name (atk_obj, "visible-data-changed");
|
|
}
|
|
|
|
static void
|
|
eel_canvas_accessible_initialize (AtkObject *obj,
|
|
gpointer data)
|
|
{
|
|
EelCanvas *canvas = data;
|
|
|
|
if (ATK_OBJECT_CLASS (accessible_parent_class)->initialize != NULL)
|
|
{
|
|
ATK_OBJECT_CLASS (accessible_parent_class)->initialize (obj, data);
|
|
}
|
|
|
|
gtk_accessible_set_widget (GTK_ACCESSIBLE (obj), GTK_WIDGET (data));
|
|
g_signal_connect (gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas)),
|
|
"value-changed",
|
|
G_CALLBACK (eel_canvas_accessible_adjustment_changed),
|
|
obj);
|
|
g_signal_connect (gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas)),
|
|
"value-changed",
|
|
G_CALLBACK (eel_canvas_accessible_adjustment_changed),
|
|
obj);
|
|
|
|
obj->role = ATK_ROLE_LAYERED_PANE;
|
|
}
|
|
|
|
static gint
|
|
eel_canvas_accessible_get_n_children (AtkObject *obj)
|
|
{
|
|
GtkAccessible *accessible;
|
|
GtkWidget *widget;
|
|
EelCanvas *canvas;
|
|
EelCanvasGroup *root_group;
|
|
|
|
accessible = GTK_ACCESSIBLE (obj);
|
|
widget = gtk_accessible_get_widget (accessible);
|
|
|
|
if (widget == NULL)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS (widget), 0);
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
root_group = eel_canvas_root (canvas);
|
|
g_return_val_if_fail (root_group, 0);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static AtkObject *
|
|
eel_canvas_accessible_ref_child (AtkObject *obj,
|
|
gint i)
|
|
{
|
|
GtkAccessible *accessible;
|
|
GtkWidget *widget;
|
|
EelCanvas *canvas;
|
|
EelCanvasGroup *root_group;
|
|
AtkObject *atk_object;
|
|
|
|
/* Canvas only has one child, so return NULL if index is non zero */
|
|
if (i != 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
accessible = GTK_ACCESSIBLE (obj);
|
|
widget = gtk_accessible_get_widget (accessible);
|
|
|
|
if (widget == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
root_group = eel_canvas_root (canvas);
|
|
g_return_val_if_fail (root_group, NULL);
|
|
|
|
atk_object = atk_gobject_accessible_for_object (G_OBJECT (root_group));
|
|
|
|
return g_object_ref (atk_object);
|
|
}
|
|
|
|
static void
|
|
eel_canvas_accessible_class_init (EelCanvasAccessibleClass *klass)
|
|
{
|
|
AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
|
|
|
|
accessible_parent_class = g_type_class_peek_parent (klass);
|
|
|
|
atk_class->initialize = eel_canvas_accessible_initialize;
|
|
atk_class->get_n_children = eel_canvas_accessible_get_n_children;
|
|
atk_class->ref_child = eel_canvas_accessible_ref_child;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_accessible_init (EelCanvasAccessible *accessible)
|
|
{
|
|
}
|
|
|
|
G_DEFINE_TYPE (EelCanvasAccessible, eel_canvas_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE)
|
|
|
|
/* Class initialization function for EelCanvasClass */
|
|
static void
|
|
eel_canvas_class_init (EelCanvasClass *klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GtkWidgetClass *widget_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
widget_class = (GtkWidgetClass *) klass;
|
|
|
|
canvas_parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->set_property = eel_canvas_set_property;
|
|
gobject_class->get_property = eel_canvas_get_property;
|
|
|
|
widget_class->destroy = eel_canvas_destroy;
|
|
widget_class->map = eel_canvas_map;
|
|
widget_class->unmap = eel_canvas_unmap;
|
|
widget_class->realize = eel_canvas_realize;
|
|
widget_class->unrealize = eel_canvas_unrealize;
|
|
widget_class->size_allocate = eel_canvas_size_allocate;
|
|
widget_class->button_press_event = eel_canvas_button;
|
|
widget_class->button_release_event = eel_canvas_button;
|
|
widget_class->motion_notify_event = eel_canvas_motion;
|
|
widget_class->draw = eel_canvas_draw;
|
|
widget_class->key_press_event = eel_canvas_key;
|
|
widget_class->key_release_event = eel_canvas_key;
|
|
widget_class->enter_notify_event = eel_canvas_crossing;
|
|
widget_class->leave_notify_event = eel_canvas_crossing;
|
|
widget_class->focus_in_event = eel_canvas_focus_in;
|
|
widget_class->focus_out_event = eel_canvas_focus_out;
|
|
|
|
klass->request_update = eel_canvas_request_update_real;
|
|
|
|
gtk_widget_class_set_accessible_type (widget_class, eel_canvas_accessible_get_type ());
|
|
}
|
|
|
|
/* Callback used when the root item of a canvas is destroyed. The user should
|
|
* never ever do this, so we panic if this happens.
|
|
*/
|
|
static void
|
|
panic_root_destroyed (GtkWidget *object,
|
|
gpointer data)
|
|
{
|
|
g_error ("Eeeek, root item %p of canvas %p was destroyed!", object, data);
|
|
}
|
|
|
|
/* Object initialization function for EelCanvas */
|
|
static void
|
|
eel_canvas_init (EelCanvas *canvas)
|
|
{
|
|
guint width, height;
|
|
gtk_widget_set_can_focus (GTK_WIDGET (canvas), TRUE);
|
|
|
|
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (canvas), FALSE);
|
|
|
|
canvas->scroll_x1 = 0.0;
|
|
canvas->scroll_y1 = 0.0;
|
|
gtk_layout_get_size (GTK_LAYOUT (canvas),
|
|
&width, &height);
|
|
canvas->scroll_x2 = width;
|
|
canvas->scroll_y2 = height;
|
|
|
|
canvas->pixels_per_unit = 1.0;
|
|
|
|
canvas->pick_event.type = GDK_LEAVE_NOTIFY;
|
|
canvas->pick_event.crossing.x = 0;
|
|
canvas->pick_event.crossing.y = 0;
|
|
|
|
gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (canvas), NULL);
|
|
gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (canvas), NULL);
|
|
|
|
/* Create the root item as a special case */
|
|
|
|
canvas->root = EEL_CANVAS_ITEM (g_object_new (eel_canvas_group_get_type (), NULL));
|
|
canvas->root->canvas = canvas;
|
|
|
|
g_object_ref_sink (canvas->root);
|
|
|
|
canvas->root_destroy_id = g_signal_connect (G_OBJECT (canvas->root),
|
|
"destroy", G_CALLBACK (panic_root_destroyed), canvas);
|
|
|
|
canvas->need_repick = TRUE;
|
|
canvas->doing_update = FALSE;
|
|
}
|
|
|
|
/* Convenience function to remove the idle handler of a canvas */
|
|
static void
|
|
remove_idle (EelCanvas *canvas)
|
|
{
|
|
if (canvas->idle_id == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
g_source_remove (canvas->idle_id);
|
|
canvas->idle_id = 0;
|
|
}
|
|
|
|
/* Removes the transient state of the canvas (idle handler, grabs). */
|
|
static void
|
|
shutdown_transients (EelCanvas *canvas)
|
|
{
|
|
/* We turn off the need_redraw flag, since if the canvas is mapped again
|
|
* it will request a redraw anyways. We do not turn off the need_update
|
|
* flag, though, because updates are not queued when the canvas remaps
|
|
* itself.
|
|
*/
|
|
if (canvas->need_redraw)
|
|
{
|
|
canvas->need_redraw = FALSE;
|
|
}
|
|
|
|
if (canvas->grabbed_item)
|
|
{
|
|
eel_canvas_item_ungrab (canvas->grabbed_item);
|
|
}
|
|
|
|
remove_idle (canvas);
|
|
}
|
|
|
|
/* Destroy handler for EelCanvas */
|
|
static void
|
|
eel_canvas_destroy (GtkWidget *object)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (object));
|
|
|
|
/* remember, destroy can be run multiple times! */
|
|
|
|
canvas = EEL_CANVAS (object);
|
|
|
|
if (canvas->root_destroy_id)
|
|
{
|
|
g_signal_handler_disconnect (G_OBJECT (canvas->root), canvas->root_destroy_id);
|
|
canvas->root_destroy_id = 0;
|
|
}
|
|
if (canvas->root)
|
|
{
|
|
EelCanvasItem *root = canvas->root;
|
|
canvas->root = NULL;
|
|
eel_canvas_item_destroy (root);
|
|
g_object_unref (root);
|
|
}
|
|
|
|
shutdown_transients (canvas);
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->destroy)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->destroy)(object);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_new:
|
|
* @void:
|
|
*
|
|
* Creates a new empty canvas. If you wish to use the
|
|
* &EelCanvasImage item inside this canvas, then you must push the gdk_imlib
|
|
* visual and colormap before calling this function, and they can be popped
|
|
* afterwards.
|
|
*
|
|
* Return value: A newly-created canvas.
|
|
**/
|
|
GtkWidget *
|
|
eel_canvas_new (void)
|
|
{
|
|
return GTK_WIDGET (g_object_new (eel_canvas_get_type (), NULL));
|
|
}
|
|
|
|
/* Map handler for the canvas */
|
|
static void
|
|
eel_canvas_map (GtkWidget *widget)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (widget));
|
|
|
|
/* Normal widget mapping stuff */
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->map)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->map)(widget);
|
|
}
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
/* Map items */
|
|
|
|
if (canvas->root->flags & EEL_CANVAS_ITEM_VISIBLE &&
|
|
!(canvas->root->flags & EEL_CANVAS_ITEM_MAPPED) &&
|
|
EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->map)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->map)(canvas->root);
|
|
}
|
|
}
|
|
|
|
/* Unmap handler for the canvas */
|
|
static void
|
|
eel_canvas_unmap (GtkWidget *widget)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (widget));
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
shutdown_transients (canvas);
|
|
|
|
/* Unmap items */
|
|
|
|
if (EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->unmap)
|
|
{
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->unmap)(canvas->root);
|
|
}
|
|
|
|
/* Normal widget unmapping stuff */
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->unmap)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->unmap)(widget);
|
|
}
|
|
}
|
|
|
|
/* Realize handler for the canvas */
|
|
static void
|
|
eel_canvas_realize (GtkWidget *widget)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (widget));
|
|
|
|
/* Normal widget realization stuff */
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->realize)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->realize)(widget);
|
|
}
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
gdk_window_set_events (gtk_layout_get_bin_window (GTK_LAYOUT (canvas)),
|
|
(gdk_window_get_events (gtk_layout_get_bin_window (GTK_LAYOUT (canvas)))
|
|
| GDK_EXPOSURE_MASK
|
|
| GDK_BUTTON_PRESS_MASK
|
|
| GDK_BUTTON_RELEASE_MASK
|
|
| GDK_POINTER_MOTION_MASK
|
|
| GDK_KEY_PRESS_MASK
|
|
| GDK_KEY_RELEASE_MASK
|
|
| GDK_ENTER_NOTIFY_MASK
|
|
| GDK_LEAVE_NOTIFY_MASK
|
|
| GDK_FOCUS_CHANGE_MASK));
|
|
|
|
/* Create our own temporary pixmap gc and realize all the items */
|
|
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->realize)(canvas->root);
|
|
}
|
|
|
|
/* Unrealize handler for the canvas */
|
|
static void
|
|
eel_canvas_unrealize (GtkWidget *widget)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (widget));
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
shutdown_transients (canvas);
|
|
|
|
/* Unrealize items and parent widget */
|
|
|
|
(*EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->unrealize)(canvas->root);
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->unrealize)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->unrealize)(widget);
|
|
}
|
|
}
|
|
|
|
/* Handles scrolling of the canvas. Adjusts the scrolling and zooming offset to
|
|
* keep as much as possible of the canvas scrolling region in view.
|
|
*/
|
|
static void
|
|
scroll_to (EelCanvas *canvas,
|
|
int cx,
|
|
int cy)
|
|
{
|
|
int scroll_width, scroll_height;
|
|
int right_limit, bottom_limit;
|
|
int old_zoom_xofs, old_zoom_yofs;
|
|
int changed_x = FALSE, changed_y = FALSE;
|
|
int canvas_width, canvas_height;
|
|
GtkAllocation allocation;
|
|
GtkAdjustment *vadjustment, *hadjustment;
|
|
guint width, height;
|
|
|
|
gtk_widget_get_allocation (GTK_WIDGET (canvas), &allocation);
|
|
canvas_width = allocation.width;
|
|
canvas_height = allocation.height;
|
|
|
|
scroll_width = floor ((canvas->scroll_x2 - canvas->scroll_x1) * canvas->pixels_per_unit + 0.5);
|
|
scroll_height = floor ((canvas->scroll_y2 - canvas->scroll_y1) * canvas->pixels_per_unit + 0.5);
|
|
|
|
right_limit = scroll_width - canvas_width;
|
|
bottom_limit = scroll_height - canvas_height;
|
|
|
|
old_zoom_xofs = canvas->zoom_xofs;
|
|
old_zoom_yofs = canvas->zoom_yofs;
|
|
|
|
if (right_limit < 0)
|
|
{
|
|
cx = 0;
|
|
if (canvas->center_scroll_region)
|
|
{
|
|
canvas->zoom_xofs = (canvas_width - scroll_width) / 2;
|
|
scroll_width = canvas_width;
|
|
}
|
|
else
|
|
{
|
|
canvas->zoom_xofs = 0;
|
|
}
|
|
}
|
|
else if (cx < 0)
|
|
{
|
|
cx = 0;
|
|
canvas->zoom_xofs = 0;
|
|
}
|
|
else if (cx > right_limit)
|
|
{
|
|
cx = right_limit;
|
|
canvas->zoom_xofs = 0;
|
|
}
|
|
else
|
|
{
|
|
canvas->zoom_xofs = 0;
|
|
}
|
|
|
|
if (bottom_limit < 0)
|
|
{
|
|
cy = 0;
|
|
if (canvas->center_scroll_region)
|
|
{
|
|
canvas->zoom_yofs = (canvas_height - scroll_height) / 2;
|
|
scroll_height = canvas_height;
|
|
}
|
|
else
|
|
{
|
|
canvas->zoom_yofs = 0;
|
|
}
|
|
}
|
|
else if (cy < 0)
|
|
{
|
|
cy = 0;
|
|
canvas->zoom_yofs = 0;
|
|
}
|
|
else if (cy > bottom_limit)
|
|
{
|
|
cy = bottom_limit;
|
|
canvas->zoom_yofs = 0;
|
|
}
|
|
else
|
|
{
|
|
canvas->zoom_yofs = 0;
|
|
}
|
|
|
|
if ((canvas->zoom_xofs != old_zoom_xofs) || (canvas->zoom_yofs != old_zoom_yofs))
|
|
{
|
|
/* This can only occur, if either canvas size or widget size changes */
|
|
/* So I think we can request full redraw here */
|
|
/* More stuff - we have to mark root as needing fresh affine (Lauris) */
|
|
if (!(canvas->root->flags & EEL_CANVAS_ITEM_NEED_DEEP_UPDATE))
|
|
{
|
|
canvas->root->flags |= EEL_CANVAS_ITEM_NEED_DEEP_UPDATE;
|
|
eel_canvas_request_update (canvas);
|
|
}
|
|
gtk_widget_queue_draw (GTK_WIDGET (canvas));
|
|
}
|
|
|
|
hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
|
|
vadjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
|
|
|
|
if (((int) gtk_adjustment_get_value (hadjustment)) != cx)
|
|
{
|
|
gtk_adjustment_set_value (hadjustment, cx);
|
|
changed_x = TRUE;
|
|
}
|
|
|
|
if (((int) gtk_adjustment_get_value (vadjustment)) != cy)
|
|
{
|
|
gtk_adjustment_set_value (vadjustment, cy);
|
|
changed_y = TRUE;
|
|
}
|
|
|
|
gtk_layout_get_size (&canvas->layout, &width, &height);
|
|
if ((scroll_width != (int) width) || (scroll_height != (int) height))
|
|
{
|
|
gtk_layout_set_size (GTK_LAYOUT (canvas), scroll_width, scroll_height);
|
|
}
|
|
|
|
/* Signal GtkLayout that it should do a redraw. */
|
|
if (changed_x)
|
|
{
|
|
g_signal_emit_by_name (hadjustment, "value-changed");
|
|
}
|
|
if (changed_y)
|
|
{
|
|
g_signal_emit_by_name (vadjustment, "value-changed");
|
|
}
|
|
}
|
|
|
|
/* Size allocation handler for the canvas */
|
|
static void
|
|
eel_canvas_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
EelCanvas *canvas;
|
|
GtkAdjustment *vadjustment, *hadjustment;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (widget));
|
|
g_return_if_fail (allocation != NULL);
|
|
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->size_allocate)
|
|
{
|
|
(*GTK_WIDGET_CLASS (canvas_parent_class)->size_allocate)(widget, allocation);
|
|
}
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
/* Recenter the view, if appropriate */
|
|
|
|
hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
|
|
vadjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
|
|
|
|
gtk_adjustment_set_page_size (hadjustment, allocation->width);
|
|
gtk_adjustment_set_page_increment (hadjustment, allocation->width / 2);
|
|
|
|
gtk_adjustment_set_page_size (vadjustment, allocation->height);
|
|
gtk_adjustment_set_page_increment (vadjustment, allocation->height / 2);
|
|
|
|
scroll_to (canvas,
|
|
gtk_adjustment_get_value (hadjustment),
|
|
gtk_adjustment_get_value (vadjustment));
|
|
|
|
g_signal_emit_by_name (hadjustment, "changed");
|
|
g_signal_emit_by_name (vadjustment, "changed");
|
|
}
|
|
|
|
/* Emits an event for an item in the canvas, be it the current item, grabbed
|
|
* item, or focused item, as appropriate.
|
|
*/
|
|
|
|
static int
|
|
emit_event (EelCanvas *canvas,
|
|
GdkEvent *event)
|
|
{
|
|
GdkEvent ev;
|
|
gint finished;
|
|
EelCanvasItem *item;
|
|
EelCanvasItem *parent;
|
|
guint mask;
|
|
|
|
/* Could be an old pick event */
|
|
if (!gtk_widget_get_realized (GTK_WIDGET (canvas)))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* Perform checks for grabbed items */
|
|
|
|
if (canvas->grabbed_item &&
|
|
!is_descendant (canvas->current_item, canvas->grabbed_item))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if (canvas->grabbed_item)
|
|
{
|
|
switch (event->type)
|
|
{
|
|
case GDK_ENTER_NOTIFY:
|
|
{
|
|
mask = GDK_ENTER_NOTIFY_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_LEAVE_NOTIFY:
|
|
{
|
|
mask = GDK_LEAVE_NOTIFY_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_MOTION_NOTIFY:
|
|
{
|
|
mask = GDK_POINTER_MOTION_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_BUTTON_PRESS:
|
|
case GDK_2BUTTON_PRESS:
|
|
case GDK_3BUTTON_PRESS:
|
|
{
|
|
mask = GDK_BUTTON_PRESS_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_BUTTON_RELEASE:
|
|
{
|
|
mask = GDK_BUTTON_RELEASE_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_KEY_PRESS:
|
|
{
|
|
mask = GDK_KEY_PRESS_MASK;
|
|
}
|
|
break;
|
|
|
|
case GDK_KEY_RELEASE:
|
|
{
|
|
mask = GDK_KEY_RELEASE_MASK;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
mask = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!(mask & canvas->grabbed_event_mask))
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Convert to world coordinates -- we have two cases because of diferent
|
|
* offsets of the fields in the event structures.
|
|
*/
|
|
|
|
ev = *event;
|
|
|
|
switch (ev.type)
|
|
{
|
|
case GDK_ENTER_NOTIFY:
|
|
case GDK_LEAVE_NOTIFY:
|
|
{
|
|
eel_canvas_window_to_world (canvas,
|
|
ev.crossing.x, ev.crossing.y,
|
|
&ev.crossing.x, &ev.crossing.y);
|
|
}
|
|
break;
|
|
|
|
case GDK_MOTION_NOTIFY:
|
|
case GDK_BUTTON_PRESS:
|
|
case GDK_2BUTTON_PRESS:
|
|
case GDK_3BUTTON_PRESS:
|
|
case GDK_BUTTON_RELEASE:
|
|
{
|
|
eel_canvas_window_to_world (canvas,
|
|
ev.motion.x, ev.motion.y,
|
|
&ev.motion.x, &ev.motion.y);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Choose where we send the event */
|
|
|
|
item = canvas->current_item;
|
|
|
|
if (canvas->focused_item
|
|
&& ((event->type == GDK_KEY_PRESS) ||
|
|
(event->type == GDK_KEY_RELEASE) ||
|
|
(event->type == GDK_FOCUS_CHANGE)))
|
|
{
|
|
item = canvas->focused_item;
|
|
}
|
|
|
|
/* The event is propagated up the hierarchy (for if someone connected to
|
|
* a group instead of a leaf event), and emission is stopped if a
|
|
* handler returns TRUE, just like for GtkWidget events.
|
|
*/
|
|
|
|
finished = FALSE;
|
|
|
|
while (item && !finished)
|
|
{
|
|
g_object_ref (item);
|
|
|
|
g_signal_emit (
|
|
G_OBJECT (item), item_signals[ITEM_EVENT], 0,
|
|
&ev, &finished);
|
|
|
|
parent = item->parent;
|
|
g_object_unref (item);
|
|
|
|
item = parent;
|
|
}
|
|
|
|
return finished;
|
|
}
|
|
|
|
/* Re-picks the current item in the canvas, based on the event's coordinates.
|
|
* Also emits enter/leave events for items as appropriate.
|
|
*/
|
|
static int
|
|
pick_current_item (EelCanvas *canvas,
|
|
GdkEvent *event)
|
|
{
|
|
int button_down;
|
|
double x, y;
|
|
int cx, cy;
|
|
int retval;
|
|
|
|
retval = FALSE;
|
|
|
|
/* If a button is down, we'll perform enter and leave events on the
|
|
* current item, but not enter on any other item. This is more or less
|
|
* like X pointer grabbing for canvas items.
|
|
*/
|
|
button_down = canvas->state & (GDK_BUTTON1_MASK
|
|
| GDK_BUTTON2_MASK
|
|
| GDK_BUTTON3_MASK
|
|
| GDK_BUTTON4_MASK
|
|
| GDK_BUTTON5_MASK);
|
|
if (!button_down)
|
|
{
|
|
canvas->left_grabbed_item = FALSE;
|
|
}
|
|
|
|
/* Save the event in the canvas. This is used to synthesize enter and
|
|
* leave events in case the current item changes. It is also used to
|
|
* re-pick the current item if the current one gets deleted. Also,
|
|
* synthesize an enter event.
|
|
*/
|
|
if (event != &canvas->pick_event)
|
|
{
|
|
if ((event->type == GDK_MOTION_NOTIFY) || (event->type == GDK_BUTTON_RELEASE))
|
|
{
|
|
/* these fields have the same offsets in both types of events */
|
|
|
|
canvas->pick_event.crossing.type = GDK_ENTER_NOTIFY;
|
|
canvas->pick_event.crossing.window = event->motion.window;
|
|
canvas->pick_event.crossing.send_event = event->motion.send_event;
|
|
canvas->pick_event.crossing.subwindow = NULL;
|
|
canvas->pick_event.crossing.x = event->motion.x;
|
|
canvas->pick_event.crossing.y = event->motion.y;
|
|
canvas->pick_event.crossing.mode = GDK_CROSSING_NORMAL;
|
|
canvas->pick_event.crossing.detail = GDK_NOTIFY_NONLINEAR;
|
|
canvas->pick_event.crossing.focus = FALSE;
|
|
canvas->pick_event.crossing.state = event->motion.state;
|
|
|
|
/* these fields don't have the same offsets in both types of events */
|
|
|
|
if (event->type == GDK_MOTION_NOTIFY)
|
|
{
|
|
canvas->pick_event.crossing.x_root = event->motion.x_root;
|
|
canvas->pick_event.crossing.y_root = event->motion.y_root;
|
|
}
|
|
else
|
|
{
|
|
canvas->pick_event.crossing.x_root = event->button.x_root;
|
|
canvas->pick_event.crossing.y_root = event->button.y_root;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
canvas->pick_event = *event;
|
|
}
|
|
}
|
|
|
|
/* Don't do anything else if this is a recursive call */
|
|
|
|
if (canvas->in_repick)
|
|
{
|
|
return retval;
|
|
}
|
|
|
|
/* LeaveNotify means that there is no current item, so we don't look for one */
|
|
|
|
if (canvas->pick_event.type != GDK_LEAVE_NOTIFY)
|
|
{
|
|
/* these fields don't have the same offsets in both types of events */
|
|
|
|
if (canvas->pick_event.type == GDK_ENTER_NOTIFY)
|
|
{
|
|
x = canvas->pick_event.crossing.x;
|
|
y = canvas->pick_event.crossing.y;
|
|
}
|
|
else
|
|
{
|
|
x = canvas->pick_event.motion.x;
|
|
y = canvas->pick_event.motion.y;
|
|
}
|
|
|
|
/* canvas pixel coords */
|
|
|
|
cx = (int) (x + 0.5);
|
|
cy = (int) (y + 0.5);
|
|
|
|
/* world coords */
|
|
eel_canvas_c2w (canvas, cx, cy, &x, &y);
|
|
|
|
/* find the closest item */
|
|
if (canvas->root->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
eel_canvas_item_invoke_point (canvas->root, x, y, cx, cy,
|
|
&canvas->new_current_item);
|
|
}
|
|
else
|
|
{
|
|
canvas->new_current_item = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
canvas->new_current_item = NULL;
|
|
}
|
|
|
|
if ((canvas->new_current_item == canvas->current_item) && !canvas->left_grabbed_item)
|
|
{
|
|
return retval; /* current item did not change */
|
|
}
|
|
/* Synthesize events for old and new current items */
|
|
|
|
if ((canvas->new_current_item != canvas->current_item)
|
|
&& (canvas->current_item != NULL)
|
|
&& !canvas->left_grabbed_item)
|
|
{
|
|
GdkEvent new_event;
|
|
|
|
new_event = canvas->pick_event;
|
|
new_event.type = GDK_LEAVE_NOTIFY;
|
|
|
|
new_event.crossing.detail = GDK_NOTIFY_ANCESTOR;
|
|
new_event.crossing.subwindow = NULL;
|
|
canvas->in_repick = TRUE;
|
|
retval = emit_event (canvas, &new_event);
|
|
canvas->in_repick = FALSE;
|
|
}
|
|
|
|
/* new_current_item may have been set to NULL during the call to emit_event() above */
|
|
|
|
if ((canvas->new_current_item != canvas->current_item) && button_down)
|
|
{
|
|
canvas->current_item = canvas->new_current_item;
|
|
canvas->left_grabbed_item = TRUE;
|
|
return retval;
|
|
}
|
|
|
|
/* Handle the rest of cases */
|
|
|
|
canvas->left_grabbed_item = FALSE;
|
|
canvas->current_item = canvas->new_current_item;
|
|
|
|
if (canvas->current_item != NULL)
|
|
{
|
|
GdkEvent new_event;
|
|
|
|
new_event = canvas->pick_event;
|
|
new_event.type = GDK_ENTER_NOTIFY;
|
|
new_event.crossing.detail = GDK_NOTIFY_ANCESTOR;
|
|
new_event.crossing.subwindow = NULL;
|
|
retval = emit_event (canvas, &new_event);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Button event handler for the canvas */
|
|
static gint
|
|
eel_canvas_button (GtkWidget *widget,
|
|
GdkEventButton *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
int mask;
|
|
int retval;
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS (widget), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
retval = FALSE;
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
/* Don't handle extra mouse button events */
|
|
if (event->button > 5)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* dispatch normally regardless of the event's window if an item has
|
|
* has a pointer grab in effect
|
|
*/
|
|
if (!canvas->grabbed_item && event->window != gtk_layout_get_bin_window (GTK_LAYOUT (canvas)))
|
|
{
|
|
return retval;
|
|
}
|
|
|
|
switch (event->button)
|
|
{
|
|
case 1:
|
|
{
|
|
mask = GDK_BUTTON1_MASK;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
{
|
|
mask = GDK_BUTTON2_MASK;
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
{
|
|
mask = GDK_BUTTON3_MASK;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
{
|
|
mask = GDK_BUTTON4_MASK;
|
|
}
|
|
break;
|
|
|
|
case 5:
|
|
{
|
|
mask = GDK_BUTTON5_MASK;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
mask = 0;
|
|
}
|
|
|
|
switch (event->type)
|
|
{
|
|
case GDK_BUTTON_PRESS:
|
|
case GDK_2BUTTON_PRESS:
|
|
case GDK_3BUTTON_PRESS:
|
|
{
|
|
/* Pick the current item as if the button were not pressed, and
|
|
* then process the event.
|
|
*/
|
|
event->state ^= mask;
|
|
canvas->state = event->state;
|
|
pick_current_item (canvas, (GdkEvent *) event);
|
|
event->state ^= mask;
|
|
canvas->state = event->state;
|
|
retval = emit_event (canvas, (GdkEvent *) event);
|
|
}
|
|
break;
|
|
|
|
case GDK_BUTTON_RELEASE:
|
|
{
|
|
/* Process the event as if the button were pressed, then repick
|
|
* after the button has been released
|
|
*/
|
|
canvas->state = event->state;
|
|
retval = emit_event (canvas, (GdkEvent *) event);
|
|
event->state ^= mask;
|
|
canvas->state = event->state;
|
|
pick_current_item (canvas, (GdkEvent *) event);
|
|
event->state ^= mask;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Motion event handler for the canvas */
|
|
static gint
|
|
eel_canvas_motion (GtkWidget *widget,
|
|
GdkEventMotion *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS (widget), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
if (event->window != gtk_layout_get_bin_window (GTK_LAYOUT (canvas)))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
canvas->state = event->state;
|
|
pick_current_item (canvas, (GdkEvent *) event);
|
|
return emit_event (canvas, (GdkEvent *) event);
|
|
}
|
|
|
|
/* Key event handler for the canvas */
|
|
static gint
|
|
eel_canvas_key (GtkWidget *widget,
|
|
GdkEventKey *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS (widget), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
if (emit_event (canvas, (GdkEvent *) event))
|
|
{
|
|
return TRUE;
|
|
}
|
|
if (event->type == GDK_KEY_RELEASE)
|
|
{
|
|
return GTK_WIDGET_CLASS (canvas_parent_class)->key_release_event (widget, event);
|
|
}
|
|
else
|
|
{
|
|
return GTK_WIDGET_CLASS (canvas_parent_class)->key_press_event (widget, event);
|
|
}
|
|
}
|
|
|
|
|
|
/* Crossing event handler for the canvas */
|
|
static gint
|
|
eel_canvas_crossing (GtkWidget *widget,
|
|
GdkEventCrossing *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
g_return_val_if_fail (EEL_IS_CANVAS (widget), FALSE);
|
|
g_return_val_if_fail (event != NULL, FALSE);
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
if (event->window != gtk_layout_get_bin_window (GTK_LAYOUT (canvas)))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
canvas->state = event->state;
|
|
return pick_current_item (canvas, (GdkEvent *) event);
|
|
}
|
|
|
|
/* Focus in handler for the canvas */
|
|
static gint
|
|
eel_canvas_focus_in (GtkWidget *widget,
|
|
GdkEventFocus *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
if (canvas->focused_item)
|
|
{
|
|
return emit_event (canvas, (GdkEvent *) event);
|
|
}
|
|
else
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Focus out handler for the canvas */
|
|
static gint
|
|
eel_canvas_focus_out (GtkWidget *widget,
|
|
GdkEventFocus *event)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
canvas = EEL_CANVAS (widget);
|
|
|
|
if (canvas->focused_item)
|
|
{
|
|
return emit_event (canvas, (GdkEvent *) event);
|
|
}
|
|
else
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
static cairo_region_t *
|
|
eel_cairo_get_clip_region (cairo_t *cr)
|
|
{
|
|
cairo_rectangle_list_t *list;
|
|
cairo_region_t *region;
|
|
int i;
|
|
|
|
list = cairo_copy_clip_rectangle_list (cr);
|
|
if (list->status == CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)
|
|
{
|
|
cairo_rectangle_int_t clip_rect;
|
|
|
|
cairo_rectangle_list_destroy (list);
|
|
|
|
if (!gdk_cairo_get_clip_rectangle (cr, &clip_rect))
|
|
{
|
|
return NULL;
|
|
}
|
|
return cairo_region_create_rectangle (&clip_rect);
|
|
}
|
|
|
|
|
|
region = cairo_region_create ();
|
|
for (i = list->num_rectangles - 1; i >= 0; --i)
|
|
{
|
|
cairo_rectangle_t *rect = &list->rectangles[i];
|
|
cairo_rectangle_int_t clip_rect;
|
|
|
|
clip_rect.x = floor (rect->x);
|
|
clip_rect.y = floor (rect->y);
|
|
clip_rect.width = ceil (rect->x + rect->width) - clip_rect.x;
|
|
clip_rect.height = ceil (rect->y + rect->height) - clip_rect.y;
|
|
|
|
if (cairo_region_union_rectangle (region, &clip_rect) != CAIRO_STATUS_SUCCESS)
|
|
{
|
|
cairo_region_destroy (region);
|
|
region = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
cairo_rectangle_list_destroy (list);
|
|
return region;
|
|
}
|
|
|
|
/* Expose handler for the canvas */
|
|
static gboolean
|
|
eel_canvas_draw (GtkWidget *widget,
|
|
cairo_t *cr)
|
|
{
|
|
EelCanvas *canvas = EEL_CANVAS (widget);
|
|
GdkWindow *bin_window;
|
|
cairo_region_t *region;
|
|
|
|
if (!gdk_cairo_get_clip_rectangle (cr, NULL))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (widget));
|
|
|
|
if (!gtk_cairo_should_draw_window (cr, bin_window))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
cairo_save (cr);
|
|
|
|
gtk_cairo_transform_to_window (cr, widget, bin_window);
|
|
|
|
region = eel_cairo_get_clip_region (cr);
|
|
if (region == NULL)
|
|
{
|
|
cairo_restore (cr);
|
|
return FALSE;
|
|
}
|
|
|
|
#ifdef VERBOSE
|
|
g_print ("Draw\n");
|
|
#endif
|
|
/* If there are any outstanding items that need updating, do them now */
|
|
if (canvas->idle_id)
|
|
{
|
|
g_source_remove (canvas->idle_id);
|
|
canvas->idle_id = 0;
|
|
}
|
|
if (canvas->need_update)
|
|
{
|
|
g_return_val_if_fail (!canvas->doing_update, FALSE);
|
|
|
|
canvas->doing_update = TRUE;
|
|
eel_canvas_item_invoke_update (canvas->root, 0, 0, 0);
|
|
|
|
g_return_val_if_fail (canvas->doing_update, FALSE);
|
|
|
|
canvas->doing_update = FALSE;
|
|
|
|
canvas->need_update = FALSE;
|
|
}
|
|
|
|
if (canvas->root->flags & EEL_CANVAS_ITEM_MAPPED)
|
|
{
|
|
EEL_CANVAS_ITEM_GET_CLASS (canvas->root)->draw (canvas->root, cr, region);
|
|
}
|
|
|
|
cairo_restore (cr);
|
|
|
|
/* Chain up to get exposes on child widgets */
|
|
if (GTK_WIDGET_CLASS (canvas_parent_class)->draw)
|
|
{
|
|
GTK_WIDGET_CLASS (canvas_parent_class)->draw (widget, cr);
|
|
}
|
|
|
|
cairo_region_destroy (region);
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
do_update (EelCanvas *canvas)
|
|
{
|
|
/* Cause the update if necessary */
|
|
|
|
update_again:
|
|
if (canvas->need_update)
|
|
{
|
|
g_return_if_fail (!canvas->doing_update);
|
|
|
|
canvas->doing_update = TRUE;
|
|
eel_canvas_item_invoke_update (canvas->root, 0, 0, 0);
|
|
|
|
g_return_if_fail (canvas->doing_update);
|
|
|
|
canvas->doing_update = FALSE;
|
|
|
|
canvas->need_update = FALSE;
|
|
}
|
|
|
|
/* Pick new current item */
|
|
|
|
while (canvas->need_repick)
|
|
{
|
|
canvas->need_repick = FALSE;
|
|
pick_current_item (canvas, &canvas->pick_event);
|
|
}
|
|
|
|
/* it is possible that during picking we emitted an event in which
|
|
* the user then called some function which then requested update
|
|
* of something. Without this we'd be left in a state where
|
|
* need_update would have been left TRUE and the canvas would have
|
|
* been left unpainted. */
|
|
if (canvas->need_update)
|
|
{
|
|
goto update_again;
|
|
}
|
|
}
|
|
|
|
/* Idle handler for the canvas. It deals with pending updates and redraws. */
|
|
static gint
|
|
idle_handler (gpointer data)
|
|
{
|
|
EelCanvas *canvas;
|
|
|
|
canvas = EEL_CANVAS (data);
|
|
do_update (canvas);
|
|
|
|
/* Reset idle id */
|
|
canvas->idle_id = 0;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Convenience function to add an idle handler to a canvas */
|
|
static void
|
|
add_idle (EelCanvas *canvas)
|
|
{
|
|
if (!canvas->idle_id)
|
|
{
|
|
/* We let the update idle handler have higher priority
|
|
* than the redraw idle handler so the canvas state
|
|
* will be updated during the expose event. canvas in
|
|
* expose_event.
|
|
*/
|
|
canvas->idle_id = g_idle_add_full (GDK_PRIORITY_REDRAW - 20,
|
|
idle_handler, canvas, NULL);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_root:
|
|
* @canvas: A canvas.
|
|
*
|
|
* Queries the root group of a canvas.
|
|
*
|
|
* Return value: The root group of the specified canvas.
|
|
**/
|
|
EelCanvasGroup *
|
|
eel_canvas_root (EelCanvas *canvas)
|
|
{
|
|
g_return_val_if_fail (EEL_IS_CANVAS (canvas), NULL);
|
|
|
|
return EEL_CANVAS_GROUP (canvas->root);
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_set_scroll_region:
|
|
* @canvas: A canvas.
|
|
* @x1: Leftmost limit of the scrolling region.
|
|
* @y1: Upper limit of the scrolling region.
|
|
* @x2: Rightmost limit of the scrolling region.
|
|
* @y2: Lower limit of the scrolling region.
|
|
*
|
|
* Sets the scrolling region of a canvas to the specified rectangle. The canvas
|
|
* will then be able to scroll only within this region. The view of the canvas
|
|
* is adjusted as appropriate to display as much of the new region as possible.
|
|
**/
|
|
void
|
|
eel_canvas_set_scroll_region (EelCanvas *canvas,
|
|
double x1,
|
|
double y1,
|
|
double x2,
|
|
double y2)
|
|
{
|
|
double wxofs, wyofs;
|
|
int xofs, yofs;
|
|
GtkAdjustment *vadjustment, *hadjustment;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
if ((canvas->scroll_x1 == x1) && (canvas->scroll_y1 == y1) &&
|
|
(canvas->scroll_x2 == x2) && (canvas->scroll_y2 == y2))
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Set the new scrolling region. If possible, do not move the visible contents of the
|
|
* canvas.
|
|
*/
|
|
hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
|
|
vadjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
|
|
|
|
eel_canvas_c2w (canvas,
|
|
gtk_adjustment_get_value (hadjustment) + canvas->zoom_xofs,
|
|
gtk_adjustment_get_value (vadjustment) + canvas->zoom_yofs,
|
|
/*canvas->zoom_xofs,
|
|
* canvas->zoom_yofs,*/
|
|
&wxofs, &wyofs);
|
|
|
|
canvas->scroll_x1 = x1;
|
|
canvas->scroll_y1 = y1;
|
|
canvas->scroll_x2 = x2;
|
|
canvas->scroll_y2 = y2;
|
|
|
|
eel_canvas_w2c (canvas, wxofs, wyofs, &xofs, &yofs);
|
|
|
|
scroll_to (canvas, xofs, yofs);
|
|
|
|
canvas->need_repick = TRUE;
|
|
|
|
if (!(canvas->root->flags & EEL_CANVAS_ITEM_NEED_DEEP_UPDATE))
|
|
{
|
|
canvas->root->flags |= EEL_CANVAS_ITEM_NEED_DEEP_UPDATE;
|
|
eel_canvas_request_update (canvas);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_get_scroll_region:
|
|
* @canvas: A canvas.
|
|
* @x1: Leftmost limit of the scrolling region (return value).
|
|
* @y1: Upper limit of the scrolling region (return value).
|
|
* @x2: Rightmost limit of the scrolling region (return value).
|
|
* @y2: Lower limit of the scrolling region (return value).
|
|
*
|
|
* Queries the scrolling region of a canvas.
|
|
**/
|
|
void
|
|
eel_canvas_get_scroll_region (EelCanvas *canvas,
|
|
double *x1,
|
|
double *y1,
|
|
double *x2,
|
|
double *y2)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
if (x1)
|
|
{
|
|
*x1 = canvas->scroll_x1;
|
|
}
|
|
|
|
if (y1)
|
|
{
|
|
*y1 = canvas->scroll_y1;
|
|
}
|
|
|
|
if (x2)
|
|
{
|
|
*x2 = canvas->scroll_x2;
|
|
}
|
|
|
|
if (y2)
|
|
{
|
|
*y2 = canvas->scroll_y2;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_set_pixels_per_unit:
|
|
* @canvas: A canvas.
|
|
* @n: The number of pixels that correspond to one canvas unit.
|
|
*
|
|
* Sets the zooming factor of a canvas by specifying the number of pixels that
|
|
* correspond to one canvas unit.
|
|
**/
|
|
void
|
|
eel_canvas_set_pixels_per_unit (EelCanvas *canvas,
|
|
double n)
|
|
{
|
|
GtkWidget *widget;
|
|
double cx, cy;
|
|
int x1, y1;
|
|
int center_x, center_y;
|
|
GdkWindow *window;
|
|
GdkWindowAttr attributes;
|
|
gint attributes_mask;
|
|
GtkAllocation allocation;
|
|
GtkAdjustment *vadjustment, *hadjustment;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
g_return_if_fail (n > EEL_CANVAS_EPSILON);
|
|
|
|
widget = GTK_WIDGET (canvas);
|
|
|
|
gtk_widget_get_allocation (widget, &allocation);
|
|
center_x = allocation.width / 2;
|
|
center_y = allocation.height / 2;
|
|
|
|
/* Find the coordinates of the screen center in units. */
|
|
hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
|
|
vadjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
|
|
cx = (gtk_adjustment_get_value (hadjustment) + center_x) / canvas->pixels_per_unit + canvas->scroll_x1 + canvas->zoom_xofs;
|
|
cy = (gtk_adjustment_get_value (vadjustment) + center_y) / canvas->pixels_per_unit + canvas->scroll_y1 + canvas->zoom_yofs;
|
|
|
|
/* Now calculate the new offset of the upper left corner. (round not truncate) */
|
|
x1 = ((cx - canvas->scroll_x1) * n) - center_x + .5;
|
|
y1 = ((cy - canvas->scroll_y1) * n) - center_y + .5;
|
|
|
|
canvas->pixels_per_unit = n;
|
|
|
|
if (!(canvas->root->flags & EEL_CANVAS_ITEM_NEED_DEEP_UPDATE))
|
|
{
|
|
canvas->root->flags |= EEL_CANVAS_ITEM_NEED_DEEP_UPDATE;
|
|
eel_canvas_request_update (canvas);
|
|
}
|
|
|
|
/* Map a background None window over the bin_window to avoid
|
|
* scrolling the window scroll causing exposes.
|
|
*/
|
|
window = NULL;
|
|
if (gtk_widget_get_mapped (widget))
|
|
{
|
|
attributes.window_type = GDK_WINDOW_CHILD;
|
|
gtk_widget_get_allocation (widget, &allocation);
|
|
attributes.x = allocation.x;
|
|
attributes.y = allocation.y;
|
|
attributes.width = allocation.width;
|
|
attributes.height = allocation.height;
|
|
attributes.wclass = GDK_INPUT_OUTPUT;
|
|
attributes.visual = gtk_widget_get_visual (widget);
|
|
attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
|
|
|
|
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
|
|
|
|
window = gdk_window_new (gtk_widget_get_parent_window (widget),
|
|
&attributes, attributes_mask);
|
|
gdk_window_set_user_data (window, widget);
|
|
|
|
gdk_window_show (window);
|
|
}
|
|
|
|
scroll_to (canvas, x1, y1);
|
|
|
|
/* If we created a an overlapping background None window, remove it how.
|
|
*
|
|
* TODO: We would like to temporarily set the bin_window background to
|
|
* None to avoid clearing the bin_window to the background, but gdk doesn't
|
|
* expose enought to let us do this, so we get a flash-effect here. At least
|
|
* it looks better than scroll + expose.
|
|
*/
|
|
if (window != NULL)
|
|
{
|
|
gdk_window_hide (window);
|
|
gdk_window_set_user_data (window, NULL);
|
|
gdk_window_destroy (window);
|
|
}
|
|
|
|
canvas->need_repick = TRUE;
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_get_scroll_offsets:
|
|
* @canvas: A canvas.
|
|
* @cx: Horizontal scrolling offset (return value).
|
|
* @cy: Vertical scrolling offset (return value).
|
|
*
|
|
* Queries the scrolling offsets of a canvas. The values are returned in canvas
|
|
* pixel units.
|
|
**/
|
|
void
|
|
eel_canvas_get_scroll_offsets (EelCanvas *canvas,
|
|
int *cx,
|
|
int *cy)
|
|
{
|
|
GtkAdjustment *vadjustment, *hadjustment;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
|
|
vadjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
|
|
|
|
if (cx)
|
|
{
|
|
*cx = gtk_adjustment_get_value (hadjustment);
|
|
}
|
|
|
|
if (cy)
|
|
{
|
|
*cy = gtk_adjustment_get_value (vadjustment);
|
|
}
|
|
}
|
|
|
|
/* Queues an update of the canvas */
|
|
static void
|
|
eel_canvas_request_update (EelCanvas *canvas)
|
|
{
|
|
EEL_CANVAS_GET_CLASS (canvas)->request_update (canvas);
|
|
}
|
|
|
|
static void
|
|
eel_canvas_request_update_real (EelCanvas *canvas)
|
|
{
|
|
canvas->need_update = TRUE;
|
|
add_idle (canvas);
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_request_redraw:
|
|
* @canvas: A canvas.
|
|
* @x1: Leftmost coordinate of the rectangle to be redrawn.
|
|
* @y1: Upper coordinate of the rectangle to be redrawn.
|
|
* @x2: Rightmost coordinate of the rectangle to be redrawn, plus 1.
|
|
* @y2: Lower coordinate of the rectangle to be redrawn, plus 1.
|
|
*
|
|
* Convenience function that informs a canvas that the specified rectangle needs
|
|
* to be repainted. The rectangle includes @x1 and @y1, but not @x2 and @y2.
|
|
* To be used only by item implementations.
|
|
**/
|
|
void
|
|
eel_canvas_request_redraw (EelCanvas *canvas,
|
|
int x1,
|
|
int y1,
|
|
int x2,
|
|
int y2)
|
|
{
|
|
GdkRectangle bbox;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
if (!gtk_widget_is_drawable (GTK_WIDGET (canvas))
|
|
|| (x1 >= x2) || (y1 >= y2))
|
|
{
|
|
return;
|
|
}
|
|
|
|
bbox.x = x1;
|
|
bbox.y = y1;
|
|
bbox.width = x2 - x1;
|
|
bbox.height = y2 - y1;
|
|
|
|
gdk_window_invalidate_rect (gtk_layout_get_bin_window (GTK_LAYOUT (canvas)),
|
|
&bbox, FALSE);
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_w2c:
|
|
* @canvas: A canvas.
|
|
* @wx: World X coordinate.
|
|
* @wy: World Y coordinate.
|
|
* @cx: X pixel coordinate (return value).
|
|
* @cy: Y pixel coordinate (return value).
|
|
*
|
|
* Converts world coordinates into canvas pixel coordinates.
|
|
**/
|
|
void
|
|
eel_canvas_w2c (EelCanvas *canvas,
|
|
double wx,
|
|
double wy,
|
|
int *cx,
|
|
int *cy)
|
|
{
|
|
double zoom;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
zoom = canvas->pixels_per_unit;
|
|
|
|
if (cx)
|
|
{
|
|
*cx = floor ((wx - canvas->scroll_x1) * zoom + canvas->zoom_xofs + 0.5);
|
|
}
|
|
if (cy)
|
|
{
|
|
*cy = floor ((wy - canvas->scroll_y1) * zoom + canvas->zoom_yofs + 0.5);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* eel_canvas_w2c:
|
|
* @canvas: A canvas.
|
|
* @world: rectangle in world coordinates.
|
|
* @canvas: rectangle in canvase coordinates.
|
|
*
|
|
* Converts rectangles in world coordinates into canvas pixel coordinates.
|
|
**/
|
|
void
|
|
eel_canvas_w2c_rect_d (EelCanvas *canvas,
|
|
double *x1,
|
|
double *y1,
|
|
double *x2,
|
|
double *y2)
|
|
{
|
|
eel_canvas_w2c_d (canvas,
|
|
*x1, *y1,
|
|
x1, y1);
|
|
eel_canvas_w2c_d (canvas,
|
|
*x2, *y2,
|
|
x2, y2);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* eel_canvas_w2c_d:
|
|
* @canvas: A canvas.
|
|
* @wx: World X coordinate.
|
|
* @wy: World Y coordinate.
|
|
* @cx: X pixel coordinate (return value).
|
|
* @cy: Y pixel coordinate (return value).
|
|
*
|
|
* Converts world coordinates into canvas pixel coordinates. This version
|
|
* produces coordinates in floating point coordinates, for greater precision.
|
|
**/
|
|
void
|
|
eel_canvas_w2c_d (EelCanvas *canvas,
|
|
double wx,
|
|
double wy,
|
|
double *cx,
|
|
double *cy)
|
|
{
|
|
double zoom;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
zoom = canvas->pixels_per_unit;
|
|
|
|
if (cx)
|
|
{
|
|
*cx = (wx - canvas->scroll_x1) * zoom + canvas->zoom_xofs;
|
|
}
|
|
if (cy)
|
|
{
|
|
*cy = (wy - canvas->scroll_y1) * zoom + canvas->zoom_yofs;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_c2w:
|
|
* @canvas: A canvas.
|
|
* @cx: Canvas pixel X coordinate.
|
|
* @cy: Canvas pixel Y coordinate.
|
|
* @wx: X world coordinate (return value).
|
|
* @wy: Y world coordinate (return value).
|
|
*
|
|
* Converts canvas pixel coordinates to world coordinates.
|
|
**/
|
|
void
|
|
eel_canvas_c2w (EelCanvas *canvas,
|
|
int cx,
|
|
int cy,
|
|
double *wx,
|
|
double *wy)
|
|
{
|
|
double zoom;
|
|
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
zoom = canvas->pixels_per_unit;
|
|
|
|
if (wx)
|
|
{
|
|
*wx = (cx - canvas->zoom_xofs) / zoom + canvas->scroll_x1;
|
|
}
|
|
if (wy)
|
|
{
|
|
*wy = (cy - canvas->zoom_yofs) / zoom + canvas->scroll_y1;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_window_to_world:
|
|
* @canvas: A canvas.
|
|
* @winx: Window-relative X coordinate.
|
|
* @winy: Window-relative Y coordinate.
|
|
* @worldx: X world coordinate (return value).
|
|
* @worldy: Y world coordinate (return value).
|
|
*
|
|
* Converts window-relative coordinates into world coordinates. You can use
|
|
* this when you need to convert mouse coordinates into world coordinates, for
|
|
* example.
|
|
* Window coordinates are really the same as canvas coordinates now, but this
|
|
* function is here for backwards compatibility reasons.
|
|
**/
|
|
void
|
|
eel_canvas_window_to_world (EelCanvas *canvas,
|
|
double winx,
|
|
double winy,
|
|
double *worldx,
|
|
double *worldy)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
if (worldx)
|
|
{
|
|
*worldx = canvas->scroll_x1 + ((winx - canvas->zoom_xofs)
|
|
/ canvas->pixels_per_unit);
|
|
}
|
|
|
|
if (worldy)
|
|
{
|
|
*worldy = canvas->scroll_y1 + ((winy - canvas->zoom_yofs)
|
|
/ canvas->pixels_per_unit);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_canvas_world_to_window:
|
|
* @canvas: A canvas.
|
|
* @worldx: World X coordinate.
|
|
* @worldy: World Y coordinate.
|
|
* @winx: X window-relative coordinate.
|
|
* @winy: Y window-relative coordinate.
|
|
*
|
|
* Converts world coordinates into window-relative coordinates.
|
|
* Window coordinates are really the same as canvas coordinates now, but this
|
|
* function is here for backwards compatibility reasons.
|
|
**/
|
|
void
|
|
eel_canvas_world_to_window (EelCanvas *canvas,
|
|
double worldx,
|
|
double worldy,
|
|
double *winx,
|
|
double *winy)
|
|
{
|
|
g_return_if_fail (EEL_IS_CANVAS (canvas));
|
|
|
|
if (winx)
|
|
{
|
|
*winx = (canvas->pixels_per_unit) * (worldx - canvas->scroll_x1) + canvas->zoom_xofs;
|
|
}
|
|
|
|
if (winy)
|
|
{
|
|
*winy = (canvas->pixels_per_unit) * (worldy - canvas->scroll_y1) + canvas->zoom_yofs;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
boolean_handled_accumulator (GSignalInvocationHint *ihint,
|
|
GValue *return_accu,
|
|
const GValue *handler_return,
|
|
gpointer dummy)
|
|
{
|
|
gboolean continue_emission;
|
|
gboolean signal_handled;
|
|
|
|
signal_handled = g_value_get_boolean (handler_return);
|
|
g_value_set_boolean (return_accu, signal_handled);
|
|
continue_emission = !signal_handled;
|
|
|
|
return continue_emission;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_get_item_extents (EelCanvasItem *item,
|
|
GdkRectangle *rect)
|
|
{
|
|
double bx1, bx2, by1, by2;
|
|
gint scroll_x, scroll_y;
|
|
gint x1, x2, y1, y2;
|
|
|
|
eel_canvas_item_get_bounds (item, &bx1, &by1, &bx2, &by2);
|
|
eel_canvas_w2c_rect_d (item->canvas, &bx1, &by1, &bx2, &by2);
|
|
eel_canvas_get_scroll_offsets (item->canvas, &scroll_x, &scroll_y);
|
|
x1 = floor (bx1 + .5);
|
|
y1 = floor (by1 + .5);
|
|
x2 = floor (bx2 + .5);
|
|
y2 = floor (by2 + .5);
|
|
rect->x = x1 - scroll_x;
|
|
rect->y = y1 - scroll_y;
|
|
rect->width = x2 - x1;
|
|
rect->height = y2 - y1;
|
|
}
|
|
|
|
static gboolean
|
|
eel_canvas_item_accessible_is_item_in_window (EelCanvasItem *item,
|
|
GdkRectangle *rect)
|
|
{
|
|
GtkWidget *widget;
|
|
gboolean retval;
|
|
|
|
widget = GTK_WIDGET (item->canvas);
|
|
if (gtk_widget_get_window (widget))
|
|
{
|
|
int window_width, window_height;
|
|
|
|
gdk_window_get_geometry (gtk_widget_get_window (widget), NULL, NULL,
|
|
&window_width, &window_height);
|
|
/*
|
|
* Check whether rectangles intersect
|
|
*/
|
|
if (rect->x + rect->width < 0 ||
|
|
rect->y + rect->height < 0 ||
|
|
rect->x > window_width ||
|
|
rect->y > window_height)
|
|
{
|
|
retval = FALSE;
|
|
}
|
|
else
|
|
{
|
|
retval = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
retval = FALSE;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void
|
|
eel_canvas_item_accessible_get_extents (AtkComponent *component,
|
|
gint *x,
|
|
gint *y,
|
|
gint *width,
|
|
gint *height,
|
|
AtkCoordType coord_type)
|
|
{
|
|
AtkGObjectAccessible *atk_gobj;
|
|
GObject *obj;
|
|
EelCanvasItem *item;
|
|
gint window_x, window_y;
|
|
gint toplevel_x, toplevel_y;
|
|
GdkRectangle rect;
|
|
GdkWindow *window;
|
|
GtkWidget *canvas;
|
|
|
|
atk_gobj = ATK_GOBJECT_ACCESSIBLE (component);
|
|
obj = atk_gobject_accessible_get_object (atk_gobj);
|
|
|
|
if (obj == NULL)
|
|
{
|
|
/* item is defunct */
|
|
return;
|
|
}
|
|
|
|
/* Get the CanvasItem */
|
|
item = EEL_CANVAS_ITEM (obj);
|
|
|
|
/* If this item has no parent canvas, something's broken */
|
|
g_return_if_fail (GTK_IS_WIDGET (item->canvas));
|
|
|
|
eel_canvas_item_accessible_get_item_extents (item, &rect);
|
|
*width = rect.width;
|
|
*height = rect.height;
|
|
if (!eel_canvas_item_accessible_is_item_in_window (item, &rect))
|
|
{
|
|
*x = G_MININT;
|
|
*y = G_MININT;
|
|
return;
|
|
}
|
|
|
|
canvas = GTK_WIDGET (item->canvas);
|
|
window = gtk_widget_get_parent_window (canvas);
|
|
gdk_window_get_origin (window, &window_x, &window_y);
|
|
*x = rect.x + window_x;
|
|
*y = rect.y + window_y;
|
|
if (coord_type == ATK_XY_WINDOW)
|
|
{
|
|
window = gdk_window_get_toplevel (gtk_widget_get_window (canvas));
|
|
gdk_window_get_origin (window, &toplevel_x, &toplevel_y);
|
|
*x -= toplevel_x;
|
|
*y -= toplevel_y;
|
|
}
|
|
return;
|
|
}
|
|
|
|
static gint
|
|
eel_canvas_item_accessible_get_mdi_zorder (AtkComponent *component)
|
|
{
|
|
AtkGObjectAccessible *atk_gobj;
|
|
GObject *g_obj;
|
|
EelCanvasItem *item;
|
|
|
|
atk_gobj = ATK_GOBJECT_ACCESSIBLE (component);
|
|
g_obj = atk_gobject_accessible_get_object (atk_gobj);
|
|
if (g_obj == NULL)
|
|
{
|
|
/* Object is defunct */
|
|
return -1;
|
|
}
|
|
|
|
item = EEL_CANVAS_ITEM (g_obj);
|
|
if (item->parent)
|
|
{
|
|
return g_list_index (EEL_CANVAS_GROUP (item->parent)->item_list, item);
|
|
}
|
|
else
|
|
{
|
|
g_return_val_if_fail (item->canvas->root == item, -1);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
eel_canvas_item_accessible_grab_focus (AtkComponent *component)
|
|
{
|
|
AtkGObjectAccessible *atk_gobj;
|
|
GObject *obj;
|
|
EelCanvasItem *item;
|
|
GtkWidget *toplevel;
|
|
|
|
atk_gobj = ATK_GOBJECT_ACCESSIBLE (component);
|
|
obj = atk_gobject_accessible_get_object (atk_gobj);
|
|
|
|
item = EEL_CANVAS_ITEM (obj);
|
|
if (item == NULL)
|
|
{
|
|
/* item is defunct */
|
|
return FALSE;
|
|
}
|
|
|
|
eel_canvas_item_grab_focus (item);
|
|
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (item->canvas));
|
|
if (gtk_widget_is_toplevel (toplevel))
|
|
{
|
|
gtk_window_present (GTK_WINDOW (toplevel));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_component_interface_init (AtkComponentIface *iface)
|
|
{
|
|
g_return_if_fail (iface != NULL);
|
|
|
|
iface->get_extents = eel_canvas_item_accessible_get_extents;
|
|
iface->get_mdi_zorder = eel_canvas_item_accessible_get_mdi_zorder;
|
|
iface->grab_focus = eel_canvas_item_accessible_grab_focus;
|
|
}
|
|
|
|
static gboolean
|
|
eel_canvas_item_accessible_is_item_on_screen (EelCanvasItem *item)
|
|
{
|
|
GdkRectangle rect;
|
|
|
|
eel_canvas_item_accessible_get_item_extents (item, &rect);
|
|
return eel_canvas_item_accessible_is_item_in_window (item, &rect);
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_initialize (AtkObject *obj,
|
|
gpointer data)
|
|
{
|
|
if (ATK_OBJECT_CLASS (accessible_item_parent_class)->initialize != NULL)
|
|
{
|
|
ATK_OBJECT_CLASS (accessible_item_parent_class)->initialize (obj, data);
|
|
}
|
|
g_object_set_data (G_OBJECT (obj), "atk-component-layer",
|
|
GINT_TO_POINTER (ATK_LAYER_MDI));
|
|
}
|
|
|
|
static AtkStateSet *
|
|
eel_canvas_item_accessible_ref_state_set (AtkObject *accessible)
|
|
{
|
|
AtkGObjectAccessible *atk_gobj;
|
|
GObject *obj;
|
|
EelCanvasItem *item;
|
|
AtkStateSet *state_set;
|
|
|
|
state_set = ATK_OBJECT_CLASS (accessible_item_parent_class)->ref_state_set (accessible);
|
|
atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
|
|
obj = atk_gobject_accessible_get_object (atk_gobj);
|
|
|
|
item = EEL_CANVAS_ITEM (obj);
|
|
if (item == NULL)
|
|
{
|
|
atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
|
|
}
|
|
else
|
|
{
|
|
if (item->flags & EEL_CANVAS_ITEM_VISIBLE)
|
|
{
|
|
atk_state_set_add_state (state_set, ATK_STATE_VISIBLE);
|
|
|
|
if (eel_canvas_item_accessible_is_item_on_screen (item))
|
|
{
|
|
atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
|
|
}
|
|
}
|
|
if (gtk_widget_get_can_focus (GTK_WIDGET (item->canvas)))
|
|
{
|
|
atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
|
|
|
|
if (item->canvas->focused_item == item)
|
|
{
|
|
atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
|
|
}
|
|
}
|
|
}
|
|
|
|
return state_set;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_class_init (EelCanvasItemAccessibleClass *klass)
|
|
{
|
|
AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
|
|
|
|
accessible_item_parent_class = g_type_class_peek_parent (klass);
|
|
|
|
atk_class->initialize = eel_canvas_item_accessible_initialize;
|
|
atk_class->ref_state_set = eel_canvas_item_accessible_ref_state_set;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_init (EelCanvasItemAccessible *self)
|
|
{
|
|
}
|
|
|
|
G_DEFINE_TYPE_WITH_CODE (EelCanvasItemAccessible,
|
|
eel_canvas_item_accessible,
|
|
ATK_TYPE_GOBJECT_ACCESSIBLE,
|
|
G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT,
|
|
eel_canvas_item_accessible_component_interface_init));
|
|
|
|
static GType eel_canvas_item_accessible_factory_get_type (void);
|
|
|
|
typedef AtkObjectFactory EelCanvasItemAccessibleFactory;
|
|
typedef AtkObjectFactoryClass EelCanvasItemAccessibleFactoryClass;
|
|
G_DEFINE_TYPE (EelCanvasItemAccessibleFactory, eel_canvas_item_accessible_factory,
|
|
ATK_TYPE_OBJECT_FACTORY)
|
|
|
|
static GType
|
|
eel_canvas_item_accessible_factory_get_accessible_type (void)
|
|
{
|
|
return eel_canvas_item_accessible_get_type ();
|
|
}
|
|
|
|
static AtkObject *
|
|
eel_canvas_item_accessible_factory_create_accessible (GObject *for_object)
|
|
{
|
|
AtkObject *accessible;
|
|
|
|
accessible = g_object_new (eel_canvas_item_accessible_get_type (), NULL);
|
|
atk_object_initialize (accessible, for_object);
|
|
return accessible;
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_factory_init (EelCanvasItemAccessibleFactory *self)
|
|
{
|
|
}
|
|
|
|
static void
|
|
eel_canvas_item_accessible_factory_class_init (AtkObjectFactoryClass *klass)
|
|
{
|
|
klass->create_accessible = eel_canvas_item_accessible_factory_create_accessible;
|
|
klass->get_accessible_type = eel_canvas_item_accessible_factory_get_accessible_type;
|
|
}
|
|
|
|
/* Class initialization function for EelCanvasItemClass */
|
|
static void
|
|
eel_canvas_item_class_init (EelCanvasItemClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = (GObjectClass *) klass;
|
|
|
|
item_parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->set_property = eel_canvas_item_set_property;
|
|
gobject_class->get_property = eel_canvas_item_get_property;
|
|
gobject_class->dispose = eel_canvas_item_dispose;
|
|
|
|
g_object_class_install_property
|
|
(gobject_class, ITEM_PROP_VISIBLE,
|
|
g_param_spec_boolean ("visible", NULL, NULL,
|
|
TRUE,
|
|
G_PARAM_READWRITE));
|
|
|
|
item_signals[ITEM_EVENT] =
|
|
g_signal_new ("event",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (EelCanvasItemClass, event),
|
|
boolean_handled_accumulator, NULL,
|
|
g_cclosure_marshal_generic,
|
|
G_TYPE_BOOLEAN, 1,
|
|
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
|
|
|
|
item_signals[ITEM_DESTROY] =
|
|
g_signal_new ("destroy",
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
|
|
G_STRUCT_OFFSET (EelCanvasItemClass, destroy),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID,
|
|
G_TYPE_NONE, 0);
|
|
|
|
klass->realize = eel_canvas_item_realize;
|
|
klass->unrealize = eel_canvas_item_unrealize;
|
|
klass->map = eel_canvas_item_map;
|
|
klass->unmap = eel_canvas_item_unmap;
|
|
klass->update = eel_canvas_item_update;
|
|
|
|
atk_registry_set_factory_type (atk_get_default_registry (),
|
|
EEL_TYPE_CANVAS_ITEM,
|
|
eel_canvas_item_accessible_factory_get_type ());
|
|
}
|