From 3d354c9434dbbc0bd0c7c671823e968f046fc6ba Mon Sep 17 00:00:00 2001 From: Michael Natterer Date: Sun, 18 Oct 2009 21:57:34 +0200 Subject: [PATCH] Add new widget GimpOverlayBox which is a GtkContainer subclass 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). --- app/widgets/Makefile.am | 4 + app/widgets/gimpoverlaybox.c | 466 ++++++++++++++++++++++++++++++++ app/widgets/gimpoverlaybox.h | 72 +++++ app/widgets/gimpoverlaychild.c | 474 +++++++++++++++++++++++++++++++++ app/widgets/gimpoverlaychild.h | 77 ++++++ app/widgets/widgets-types.h | 1 + 6 files changed, 1094 insertions(+) create mode 100644 app/widgets/gimpoverlaybox.c create mode 100644 app/widgets/gimpoverlaybox.h create mode 100644 app/widgets/gimpoverlaychild.c create mode 100644 app/widgets/gimpoverlaychild.h diff --git a/app/widgets/Makefile.am b/app/widgets/Makefile.am index e126c85b83..b1926e223f 100644 --- a/app/widgets/Makefile.am +++ b/app/widgets/Makefile.am @@ -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 \ diff --git a/app/widgets/gimpoverlaybox.c b/app/widgets/gimpoverlaybox.c new file mode 100644 index 0000000000..8848e06eb8 --- /dev/null +++ b/app/widgets/gimpoverlaybox.c @@ -0,0 +1,466 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * GimpOverlayBox + * Copyright (C) 2009 Michael Natterer + * + * 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 . + */ + +#include "config.h" + +#undef GSEAL_ENABLE + +#include + +#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); +} diff --git a/app/widgets/gimpoverlaybox.h b/app/widgets/gimpoverlaybox.h new file mode 100644 index 0000000000..dbdc44b5e6 --- /dev/null +++ b/app/widgets/gimpoverlaybox.h @@ -0,0 +1,72 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * GimpOverlayBox + * Copyright (C) 2009 Michael Natterer + * + * 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 . + */ + +#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__ */ diff --git a/app/widgets/gimpoverlaychild.c b/app/widgets/gimpoverlaychild.c new file mode 100644 index 0000000000..a198fe2587 --- /dev/null +++ b/app/widgets/gimpoverlaychild.c @@ -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 + * + * 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 + +#include + +#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); +} diff --git a/app/widgets/gimpoverlaychild.h b/app/widgets/gimpoverlaychild.h new file mode 100644 index 0000000000..9182927221 --- /dev/null +++ b/app/widgets/gimpoverlaychild.h @@ -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 + * + * 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__ */ diff --git a/app/widgets/widgets-types.h b/app/widgets/widgets-types.h index 50adcae002..997fb427d9 100644 --- a/app/widgets/widgets-types.h +++ b/app/widgets/widgets-types.h @@ -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;