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Add new widget GimpOverlayBox which is a GtkContainer subclass

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It keeps around its children as offscreen widgets and renders them
using a (potantially) arbitrary cairo_matrix_t (the actual API allows
for arbitrary alignment wihin the container and rotating).
This commit is contained in:
Michael Natterer 2009-10-18 21:57:34 +02:00
parent 4822ca0d6d
commit 3d354c9434
6 changed files with 1094 additions and 0 deletions
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4
app/widgets/Makefile.am
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@ -217,6 +217,10 @@ libappwidgets_a_sources = \
gimpmessagedialog.h \
gimpnavigationview.c \
gimpnavigationview.h \
gimpoverlaybox.c \
gimpoverlaybox.h \
gimpoverlaychild.c \
gimpoverlaychild.h \
gimppaletteeditor.c \
gimppaletteeditor.h \
gimppaletteselect.c \

466
app/widgets/gimpoverlaybox.c Normal file
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@ -0,0 +1,466 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpOverlayBox
* Copyright (C) 2009 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#undef GSEAL_ENABLE
#include <gtk/gtk.h>
#include "widgets-types.h"
#include "gimpoverlaybox.h"
#include "gimpoverlaychild.h"
/* local function prototypes */
static void gimp_overlay_box_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_overlay_box_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_overlay_box_realize (GtkWidget *widget);
static void gimp_overlay_box_unrealize (GtkWidget *widget);
static void gimp_overlay_box_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gimp_overlay_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gimp_overlay_box_expose (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gimp_overlay_box_damage (GtkWidget *widget,
GdkEventExpose *event);
static void gimp_overlay_box_add (GtkContainer *container,
GtkWidget *widget);
static void gimp_overlay_box_remove (GtkContainer *container,
GtkWidget *widget);
static void gimp_overlay_box_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static GType gimp_overlay_box_child_type (GtkContainer *container);
static GdkWindow * gimp_overlay_box_pick_embedded_child (GdkWindow *window,
gdouble x,
gdouble y,
GimpOverlayBox *box);
G_DEFINE_TYPE (GimpOverlayBox, gimp_overlay_box, GTK_TYPE_CONTAINER)
#define parent_class gimp_overlay_box_parent_class
static void
gimp_overlay_box_class_init (GimpOverlayBoxClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
object_class->set_property = gimp_overlay_box_set_property;
object_class->get_property = gimp_overlay_box_get_property;
widget_class->realize = gimp_overlay_box_realize;
widget_class->unrealize = gimp_overlay_box_unrealize;
widget_class->size_request = gimp_overlay_box_size_request;
widget_class->size_allocate = gimp_overlay_box_size_allocate;
widget_class->expose_event = gimp_overlay_box_expose;
g_signal_override_class_handler ("damage-event",
GIMP_TYPE_OVERLAY_BOX,
G_CALLBACK (gimp_overlay_box_damage));
container_class->add = gimp_overlay_box_add;
container_class->remove = gimp_overlay_box_remove;
container_class->forall = gimp_overlay_box_forall;
container_class->child_type = gimp_overlay_box_child_type;
}
static void
gimp_overlay_box_init (GimpOverlayBox *box)
{
}
static void
gimp_overlay_box_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_overlay_box_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_overlay_box_realize (GtkWidget *widget)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GtkAllocation allocation;
GdkWindowAttr attributes;
gint attributes_mask;
GList *list;
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
gtk_widget_get_allocation (widget, &allocation);
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
gtk_widget_set_window (widget,
gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask));
gdk_window_set_user_data (gtk_widget_get_window (widget), widget);
g_signal_connect (gtk_widget_get_window (widget), "pick-embedded-child",
G_CALLBACK (gimp_overlay_box_pick_embedded_child),
widget);
widget->style = gtk_style_attach (gtk_widget_get_style (widget),
gtk_widget_get_window (widget));
gtk_style_set_background (gtk_widget_get_style (widget),
gtk_widget_get_window (widget),
GTK_STATE_NORMAL);
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_realize (box, list->data);
}
static void
gimp_overlay_box_unrealize (GtkWidget *widget)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GList *list;
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_unrealize (box, list->data);
GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
}
static void
gimp_overlay_box_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GList *list;
gint border_width;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
requisition->width = 1 + 2 * border_width;
requisition->height = 1 + 2 * border_width;
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_size_request (box, list->data);
}
static void
gimp_overlay_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GList *list;
gtk_widget_set_allocation (widget, allocation);
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x,
allocation->y,
allocation->width,
allocation->height);
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_size_allocate (box, list->data);
}
static gboolean
gimp_overlay_box_expose (GtkWidget *widget,
GdkEventExpose *event)
{
if (gtk_widget_is_drawable (widget))
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GList *list;
for (list = box->children; list; list = g_list_next (list))
{
if (gimp_overlay_child_expose (box, list->data, event))
return TRUE;
}
}
return FALSE;
}
static gboolean
gimp_overlay_box_damage (GtkWidget *widget,
GdkEventExpose *event)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
GList *list;
for (list = box->children; list; list = g_list_next (list))
{
if (gimp_overlay_child_damage (box, list->data, event))
return TRUE;
}
return FALSE;
}
static void
gimp_overlay_box_add (GtkContainer *container,
GtkWidget *widget)
{
gimp_overlay_box_add_child (GIMP_OVERLAY_BOX (container), widget, 0.5, 0.5);
}
static void
gimp_overlay_box_remove (GtkContainer *container,
GtkWidget *widget)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (container);
GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
if (child)
{
if (gtk_widget_get_visible (widget))
gimp_overlay_child_invalidate (box, child);
box->children = g_list_remove (box->children, child);
gimp_overlay_child_free (box, child);
}
}
static void
gimp_overlay_box_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GimpOverlayBox *box = GIMP_OVERLAY_BOX (container);
GList *list;
list = box->children;
while (list)
{
GimpOverlayChild *child = list->data;
list = list->next;
(* callback) (child->widget, callback_data);
}
}
static GType
gimp_overlay_box_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static GdkWindow *
gimp_overlay_box_pick_embedded_child (GdkWindow *parent,
gdouble parent_x,
gdouble parent_y,
GimpOverlayBox *box)
{
GList *list;
for (list = box->children; list; list = g_list_next (list))
{
GimpOverlayChild *child = list->data;
if (gimp_overlay_child_pick (box, child, parent_x, parent_y))
return child->window;
}
return NULL;
}
/* public functions */
/**
* gimp_overlay_box_new:
*
* Creates a new #GimpOverlayBox widget.
*
* Return value: a new #GimpOverlayBox widget
**/
GtkWidget *
gimp_overlay_box_new (void)
{
return g_object_new (GIMP_TYPE_OVERLAY_BOX, NULL);
}
void
gimp_overlay_box_add_child (GimpOverlayBox *box,
GtkWidget *widget,
gdouble xalign,
gdouble yalign)
{
GimpOverlayChild *child;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (GTK_IS_WIDGET (widget));
child = gimp_overlay_child_new (box, widget, xalign, yalign, 0.0, 0.7);
box->children = g_list_append (box->children, child);
}
void
gimp_overlay_box_set_child_packing (GimpOverlayBox *box,
GtkWidget *widget,
gdouble xalign,
gdouble yalign)
{
GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
if (child)
{
xalign = CLAMP (xalign, 0.0, 1.0);
yalign = CLAMP (yalign, 0.0, 1.0);
if (child->xalign != xalign ||
child->yalign != yalign)
{
gimp_overlay_child_invalidate (box, child);
child->xalign = xalign;
child->yalign = yalign;
gtk_widget_queue_resize (widget);
}
}
}
void
gimp_overlay_box_set_child_angle (GimpOverlayBox *box,
GtkWidget *widget,
gdouble angle)
{
GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
if (child)
{
if (child->angle != angle)
{
gimp_overlay_child_invalidate (box, child);
child->angle = angle;
gtk_widget_queue_draw (widget);
}
}
}
void
gimp_overlay_box_set_child_opacity (GimpOverlayBox *box,
GtkWidget *widget,
gdouble opacity)
{
GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
if (child)
{
opacity = CLAMP (opacity, 0.0, 1.0);
if (child->opacity != opacity)
{
child->opacity = opacity;
gtk_widget_queue_draw (widget);
}
}
}
/**
* gimp_overlay_box_scroll:
* @box: the #GimpOverlayBox widget to scroll.
* @offset_x: the x scroll amount.
* @offset_y: the y scroll amount.
*
* Scrolls the box using gdk_window_scroll() and makes sure the result
* is displayed immediately by calling gdk_window_process_updates().
**/
void
gimp_overlay_box_scroll (GimpOverlayBox *box,
gint offset_x,
gint offset_y)
{
GtkWidget *widget;
GdkWindow *window;
GList *list;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
widget = GTK_WIDGET (box);
window = gtk_widget_get_window (widget);
/* Undraw all overlays */
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_invalidate (box, list->data);
gdk_window_scroll (window, offset_x, offset_y);
/* Re-draw all overlays */
for (list = box->children; list; list = g_list_next (list))
gimp_overlay_child_invalidate (box, list->data);
/* Make sure expose events are processed before scrolling again */
gdk_window_process_updates (window, FALSE);
}

72
app/widgets/gimpoverlaybox.h Normal file
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@ -0,0 +1,72 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpOverlayBox
* Copyright (C) 2009 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GIMP_OVERLAY_BOX_H__
#define __GIMP_OVERLAY_BOX_H__
#define GIMP_TYPE_OVERLAY_BOX (gimp_overlay_box_get_type ())
#define GIMP_OVERLAY_BOX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OVERLAY_BOX, GimpOverlayBox))
#define GIMP_OVERLAY_BOX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_OVERLAY_BOX, GimpOverlayBoxClass))
#define GIMP_IS_OVERLAY_BOX(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OVERLAY_BOX))
#define GIMP_IS_OVERLAY_BOX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_OVERLAY_BOX))
#define GIMP_OVERLAY_BOX_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_OVERLAY_BOX, GimpOverlayBoxClass))
typedef struct _GimpOverlayBoxClass GimpOverlayBoxClass;
struct _GimpOverlayBox
{
GtkContainer parent_instance;
GList *children;
};
struct _GimpOverlayBoxClass
{
GtkContainerClass parent_class;
};
GType gimp_overlay_box_get_type (void) G_GNUC_CONST;
GtkWidget * gimp_overlay_box_new (void);
void gimp_overlay_box_add_child (GimpOverlayBox *canvas,
GtkWidget *child,
gdouble xalign,
gdouble yalign);
void gimp_overlay_box_set_child_packing (GimpOverlayBox *canvas,
GtkWidget *child,
gdouble xalign,
gdouble yalign);
void gimp_overlay_box_set_child_angle (GimpOverlayBox *canvas,
GtkWidget *child,
gdouble angle);
void gimp_overlay_box_set_child_opacity (GimpOverlayBox *canvas,
GtkWidget *child,
gdouble opacity);
void gimp_overlay_box_scroll (GimpOverlayBox *canvas,
gint offset_x,
gint offset_y);
#endif /* __GIMP_OVERLAY_BOX_H__ */

474
app/widgets/gimpoverlaychild.c Normal file
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@ -0,0 +1,474 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoverlaychild.c
* Copyright (C) 2009 Michael Natterer <mitch@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#undef GSEAL_ENABLE
#include <gtk/gtk.h>
#include <libgimpmath/gimpmath.h>
#include "widgets-types.h"
#include "gimpoverlaybox.h"
#include "gimpoverlaychild.h"
/* local function prototypes */
static void gimp_overlay_child_transform_bounds (GimpOverlayChild *child,
GdkRectangle *bounds_child,
GdkRectangle *bounds_box);
static void gimp_overlay_child_from_embedder (GdkWindow *child_window,
gdouble box_x,
gdouble box_y,
gdouble *child_x,
gdouble *child_y,
GimpOverlayChild *child);
static void gimp_overlay_child_to_embedder (GdkWindow *child_window,
gdouble child_x,
gdouble child_y,
gdouble *box_x,
gdouble *box_y,
GimpOverlayChild *child);
/* public functions */
GimpOverlayChild *
gimp_overlay_child_new (GimpOverlayBox *box,
GtkWidget *widget,
gdouble xalign,
gdouble yalign,
gdouble angle,
gdouble opacity)
{
GimpOverlayChild *child;
g_return_val_if_fail (GIMP_IS_OVERLAY_BOX (box), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
child = g_slice_new0 (GimpOverlayChild);
child->widget = widget;
child->xalign = CLAMP (xalign, 0.0, 1.0);
child->yalign = CLAMP (yalign, 0.0, 1.0);
child->angle = angle;
child->opacity = CLAMP (opacity, 0.0, 1.0);
cairo_matrix_init_identity (&child->matrix);
if (GTK_WIDGET_REALIZED (box))
gimp_overlay_child_realize (box, child);
gtk_widget_set_parent (widget, GTK_WIDGET (box));
return child;
}
void
gimp_overlay_child_free (GimpOverlayBox *box,
GimpOverlayChild *child)
{
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
gtk_widget_unparent (child->widget);
if (GTK_WIDGET_REALIZED (box))
gimp_overlay_child_unrealize (box, child);
g_slice_free (GimpOverlayChild, child);
}
GimpOverlayChild *
gimp_overlay_child_find (GimpOverlayBox *box,
GtkWidget *widget)
{
GList *list;
g_return_val_if_fail (GIMP_IS_OVERLAY_BOX (box), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (box),
NULL);
for (list = box->children; list; list = g_list_next (list))
{
GimpOverlayChild *child = list->data;
if (child->widget == widget)
return child;
}
return NULL;
}
void
gimp_overlay_child_realize (GimpOverlayBox *box,
GimpOverlayChild *child)
{
GtkWidget *widget;
GtkAllocation child_allocation;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
widget = GTK_WIDGET (box);
gtk_widget_get_allocation (child->widget, &child_allocation);
if (gtk_widget_get_visible (child->widget))
{
attributes.width = child_allocation.width;
attributes.height = child_allocation.height;
}
else
{
attributes.width = 1;
attributes.height = 1;
}
attributes.x = child_allocation.x;
attributes.y = child_allocation.y;
attributes.window_type = GDK_WINDOW_OFFSCREEN;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
child->window = gdk_window_new (gtk_widget_get_root_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (child->window, widget);
gtk_widget_set_parent_window (child->widget, child->window);
gdk_offscreen_window_set_embedder (child->window,
gtk_widget_get_window (widget));
g_signal_connect (child->window, "from-embedder",
G_CALLBACK (gimp_overlay_child_from_embedder),
child);
g_signal_connect (child->window, "to-embedder",
G_CALLBACK (gimp_overlay_child_to_embedder),
child);
gtk_style_set_background (gtk_widget_get_style (widget),
child->window, GTK_STATE_NORMAL);
gdk_window_show (child->window);
}
void
gimp_overlay_child_unrealize (GimpOverlayBox *box,
GimpOverlayChild *child)
{
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
gdk_window_set_user_data (child->window, NULL);
gdk_window_destroy (child->window);
child->window = NULL;
}
void
gimp_overlay_child_size_request (GimpOverlayBox *box,
GimpOverlayChild *child)
{
GtkRequisition child_requisition;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
gtk_widget_size_request (child->widget, &child_requisition);
}
void
gimp_overlay_child_size_allocate (GimpOverlayBox *box,
GimpOverlayChild *child)
{
GtkWidget *widget;
GtkAllocation allocation;
gint border;
GtkRequisition child_requisition;
GtkAllocation child_allocation;
GdkRectangle bounds;
gint available_width;
gint available_height;
gint x;
gint y;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
widget = GTK_WIDGET (box);
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_get_child_requisition (child->widget, &child_requisition);
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.width = child_requisition.width;
child_allocation.height = child_requisition.height;
gtk_widget_size_allocate (child->widget, &child_allocation);
gtk_widget_get_allocation (child->widget, &child_allocation);
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (child->window,
child_allocation.x,
child_allocation.y,
child_allocation.width,
child_allocation.height);
cairo_matrix_init_identity (&child->matrix);
/* local transform */
cairo_matrix_rotate (&child->matrix, child->angle);
gimp_overlay_child_transform_bounds (child, &child_allocation, &bounds);
border = gtk_container_get_border_width (GTK_CONTAINER (box));
available_width = allocation.width - 2 * border;
available_height = allocation.height - 2 * border;
x = border;
y = border;
if (available_width > bounds.width)
x += child->xalign * (available_width - bounds.width) - bounds.x;
if (available_height > bounds.height)
y += child->yalign * (available_height - bounds.height) - bounds.y;
cairo_matrix_init_translate (&child->matrix, x, y);
/* local transform */
cairo_matrix_rotate (&child->matrix, child->angle);
}
gboolean
gimp_overlay_child_expose (GimpOverlayBox *box,
GimpOverlayChild *child,
GdkEventExpose *event)
{
GtkWidget *widget;
g_return_val_if_fail (GIMP_IS_OVERLAY_BOX (box), FALSE);
g_return_val_if_fail (child != NULL, FALSE);
g_return_val_if_fail (event != NULL, FALSE);
widget = GTK_WIDGET (box);
if (event->window == gtk_widget_get_window (widget))
{
GtkAllocation child_allocation;
GdkRectangle bounds;
gtk_widget_get_allocation (child->widget, &child_allocation);
gimp_overlay_child_transform_bounds (child, &child_allocation, &bounds);
if (gtk_widget_get_visible (child->widget) &&
gdk_rectangle_intersect (&event->area, &bounds, NULL))
{
GdkPixmap *pixmap = gdk_offscreen_window_get_pixmap (child->window);
cairo_t *cr = gdk_cairo_create (gtk_widget_get_window (widget));
cairo_transform (cr, &child->matrix);
gdk_cairo_set_source_pixmap (cr, pixmap, 0, 0);
cairo_paint_with_alpha (cr, child->opacity);
cairo_destroy (cr);
}
}
else if (event->window == child->window)
{
gtk_paint_flat_box (gtk_widget_get_style (widget),
event->window,
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
&event->area, widget, NULL,
0, 0, -1, -1);
gtk_container_propagate_expose (GTK_CONTAINER (widget),
child->widget,
event);
return TRUE;
}
return FALSE;
}
gboolean
gimp_overlay_child_damage (GimpOverlayBox *box,
GimpOverlayChild *child,
GdkEventExpose *event)
{
GtkWidget *widget;
g_return_val_if_fail (GIMP_IS_OVERLAY_BOX (box), FALSE);
g_return_val_if_fail (child != NULL, FALSE);
g_return_val_if_fail (event != NULL, FALSE);
widget = GTK_WIDGET (box);
if (event->window == child->window)
{
GdkRectangle bounds;
gimp_overlay_child_transform_bounds (child, &event->area, &bounds);
gdk_window_invalidate_rect (gtk_widget_get_window (widget),
&bounds, FALSE);
return TRUE;
}
return FALSE;
}
void
gimp_overlay_child_invalidate (GimpOverlayBox *box,
GimpOverlayChild *child)
{
GdkWindow *window;
g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
g_return_if_fail (child != NULL);
window = gtk_widget_get_window (GTK_WIDGET (box));
if (window && gtk_widget_get_visible (child->widget))
{
GtkAllocation child_allocation;
GdkRectangle bounds;
gtk_widget_get_allocation (child->widget, &child_allocation);
gimp_overlay_child_transform_bounds (child, &child_allocation,
&bounds);
gdk_window_invalidate_rect (window, &bounds, FALSE);
}
}
gboolean
gimp_overlay_child_pick (GimpOverlayBox *box,
GimpOverlayChild *child,
gdouble box_x,
gdouble box_y)
{
GtkAllocation child_allocation;
gdouble child_x;
gdouble child_y;
g_return_val_if_fail (GIMP_IS_OVERLAY_BOX (box), FALSE);
g_return_val_if_fail (child != NULL, FALSE);
gimp_overlay_child_from_embedder (child->window,
box_x, box_y,
&child_x, &child_y,
child);
gtk_widget_get_allocation (child->widget, &child_allocation);
if (child_x >= 0 &&
child_x < child_allocation.width &&
child_y >= 0 &&
child_y < child_allocation.height)
{
return TRUE;
}
return FALSE;
}
/* private functions */
static void
gimp_overlay_child_transform_bounds (GimpOverlayChild *child,
GdkRectangle *bounds_child,
GdkRectangle *bounds_box)
{
gdouble x1, x2, x3, x4;
gdouble y1, y2, y3, y4;
x1 = bounds_child->x;
y1 = bounds_child->y;
x2 = bounds_child->x + bounds_child->width;
y2 = bounds_child->y;
x3 = bounds_child->x;
y3 = bounds_child->y + bounds_child->height;
x4 = bounds_child->x + bounds_child->width;
y4 = bounds_child->y + bounds_child->height;
cairo_matrix_transform_point (&child->matrix, &x1, &y1);
cairo_matrix_transform_point (&child->matrix, &x2, &y2);
cairo_matrix_transform_point (&child->matrix, &x3, &y3);
cairo_matrix_transform_point (&child->matrix, &x4, &y4);
#define MIN4(a,b,c,d) MIN(MIN((a),(b)),MIN((c),(d)))
#define MAX4(a,b,c,d) MAX(MAX((a),(b)),MAX((c),(d)))
bounds_box->x = (gint) floor (MIN4 (x1, x2, x3, x4));
bounds_box->y = (gint) floor (MIN4 (y1, y2, y3, y4));
bounds_box->width = (gint) ceil (MAX4 (x1, x2, x3, x4)) - bounds_box->x;
bounds_box->height = (gint) ceil (MAX4 (y1, y2, y3, y4)) - bounds_box->y;
}
static void
gimp_overlay_child_from_embedder (GdkWindow *child_window,
gdouble box_x,
gdouble box_y,
gdouble *child_x,
gdouble *child_y,
GimpOverlayChild *child)
{
cairo_matrix_t inverse = child->matrix;
*child_x = box_x;
*child_y = box_y;
cairo_matrix_invert (&inverse);
cairo_matrix_transform_point (&inverse, child_x, child_y);
}
static void
gimp_overlay_child_to_embedder (GdkWindow *child_window,
gdouble child_x,
gdouble child_y,
gdouble *box_x,
gdouble *box_y,
GimpOverlayChild *child)
{
*box_x = child_x;
*box_y = child_y;
cairo_matrix_transform_point (&child->matrix, box_x, box_y);
}

77
app/widgets/gimpoverlaychild.h Normal file
View file

@ -0,0 +1,77 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoverlaychild.h
* Copyright (C) 2009 Michael Natterer <mitch@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __GIMP_OVERLAY_CHILD_H__
#define __GIMP_OVERLAY_CHILD_H__
typedef struct _GimpOverlayChild GimpOverlayChild;
struct _GimpOverlayChild
{
GtkWidget *widget;
GdkWindow *window;
gdouble xalign;
gdouble yalign;
gdouble angle;
gdouble opacity;
/* updated in size_allocate */
cairo_matrix_t matrix;
};
GimpOverlayChild * gimp_overlay_child_new (GimpOverlayBox *box,
GtkWidget *widget,
gdouble xalign,
gdouble yalign,
gdouble angle,
gdouble opacity);
void gimp_overlay_child_free (GimpOverlayBox *box,
GimpOverlayChild *child);
GimpOverlayChild * gimp_overlay_child_find (GimpOverlayBox *box,
GtkWidget *widget);
void gimp_overlay_child_realize (GimpOverlayBox *box,
GimpOverlayChild *child);
void gimp_overlay_child_unrealize (GimpOverlayBox *box,
GimpOverlayChild *child);
void gimp_overlay_child_size_request (GimpOverlayBox *box,
GimpOverlayChild *child);
void gimp_overlay_child_size_allocate (GimpOverlayBox *box,
GimpOverlayChild *child);
gboolean gimp_overlay_child_expose (GimpOverlayBox *box,
GimpOverlayChild *child,
GdkEventExpose *event);
gboolean gimp_overlay_child_damage (GimpOverlayBox *box,
GimpOverlayChild *child,
GdkEventExpose *event);
void gimp_overlay_child_invalidate (GimpOverlayBox *box,
GimpOverlayChild *child);
gboolean gimp_overlay_child_pick (GimpOverlayBox *box,
GimpOverlayChild *child,
gdouble box_x,
gdouble box_y);
#endif /* __GIMP_OVERLAY_CHILD_H__ */

1
app/widgets/widgets-types.h
View file

@ -176,6 +176,7 @@ typedef struct _GimpImageProfileView GimpImageProfileView;
typedef struct _GimpLanguageStore GimpLanguageStore;
typedef struct _GimpLanguageEntry GimpLanguageEntry;
typedef struct _GimpMessageBox GimpMessageBox;
typedef struct _GimpOverlayBox GimpOverlayBox;
typedef struct _GimpProgressBox GimpProgressBox;
typedef struct _GimpScaleButton GimpScaleButton;
typedef struct _GimpSettingsBox GimpSettingsBox;