/* "Borrowed" from: */ /* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include #include #include "ghbcompat.h" #include #include #include "ghbcompositor.h" enum { PROP_0, }; enum { CHILD_PROP_0, CHILD_PROP_Z_POS, CHILD_PROP_OPACITY }; #define GHB_COMPOSITOR_GET_PRIVATE(obj) G_TYPE_INSTANCE_GET_PRIVATE((obj), GHB_TYPE_COMPOSITOR, GhbCompositorPrivate) static void ghb_compositor_finalize (GObject *object); static void ghb_compositor_realize (GtkWidget *widget); static void ghb_compositor_unrealize (GtkWidget *widget); static void ghb_compositor_size_request (GtkWidget *widget, GtkRequisition *requisition); static void ghb_compositor_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static gboolean ghb_compositor_expose (GtkWidget *widget, GdkEventExpose *event); static void ghb_compositor_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void ghb_compositor_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void ghb_compositor_add (GtkContainer *container, GtkWidget *widget); static void ghb_compositor_remove (GtkContainer *container, GtkWidget *widget); static void ghb_compositor_forall (GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer data); static GType ghb_compositor_child_type (GtkContainer *container); static void ghb_compositor_set_child_property (GtkContainer *container, GtkWidget *child, guint prop_id, const GValue *value, GParamSpec *pspec); static void ghb_compositor_get_child_property (GtkContainer *container, GtkWidget *child, guint prop_id, GValue *value, GParamSpec *pspec); G_DEFINE_TYPE (GhbCompositor, ghb_compositor, GTK_TYPE_BIN) static void ghb_compositor_class_init (GhbCompositorClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class); gobject_class->finalize = ghb_compositor_finalize; gobject_class->set_property = ghb_compositor_set_property; gobject_class->get_property = ghb_compositor_get_property; widget_class->size_request = ghb_compositor_size_request; widget_class->size_allocate = ghb_compositor_size_allocate; widget_class->realize = ghb_compositor_realize; widget_class->unrealize = ghb_compositor_unrealize; widget_class->expose_event = ghb_compositor_expose; container_class->add = ghb_compositor_add; container_class->remove = ghb_compositor_remove; container_class->forall = ghb_compositor_forall; container_class->child_type = ghb_compositor_child_type; container_class->set_child_property = ghb_compositor_set_child_property; container_class->get_child_property = ghb_compositor_get_child_property; gtk_container_class_install_child_property (container_class, CHILD_PROP_Z_POS, g_param_spec_uint ("z-pos", "Position in Z-List", "Sets the blending order of the child.", 0, 65535, 0, GTK_PARAM_READWRITE)); gtk_container_class_install_child_property (container_class, CHILD_PROP_OPACITY, g_param_spec_double ("opacity", "Opacity", "Sets the opacity of the child.", 0.0, 1.0, 1.0, GTK_PARAM_READWRITE)); } static GType ghb_compositor_child_type(GtkContainer *container) { return GTK_TYPE_WIDGET; } static void ghb_compositor_get_property ( GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GhbCompositor *compositor; compositor = GHB_COMPOSITOR (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void ghb_compositor_set_property ( GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GhbCompositor *compositor; compositor = GHB_COMPOSITOR (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gint zsort(gconstpointer a, gconstpointer b) { GhbCompositorChild *cca, *ccb; cca = (GhbCompositorChild*)a; ccb = (GhbCompositorChild*)b; return (cca->z_pos - ccb->z_pos); } static void ghb_compositor_set_child_property( GtkContainer *container, GtkWidget *child, guint prop_id, const GValue *value, GParamSpec *pspec) { GhbCompositor *compositor; GhbCompositorChild *cc; GList *link; compositor = GHB_COMPOSITOR(container); for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; if (cc->widget == child) break; } if (link == NULL) { GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID(container, prop_id, pspec); return; } switch (prop_id) { case CHILD_PROP_Z_POS: { cc->z_pos = g_value_get_uint(value); compositor->children = g_list_sort(compositor->children, zsort); } break; case CHILD_PROP_OPACITY: { cc->opacity = g_value_get_double(value); } break; default: GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID(container, prop_id, pspec); break; } if (gtk_widget_get_visible (child) && gtk_widget_get_visible (GTK_WIDGET(compositor))) { gtk_widget_queue_resize (child); } } static void ghb_compositor_get_child_property( GtkContainer *container, GtkWidget *child, guint prop_id, GValue *value, GParamSpec *pspec) { GhbCompositor *compositor; GhbCompositorChild *cc; GList *link; compositor = GHB_COMPOSITOR(container); for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; if (cc->widget == child) break; } if (link == NULL) { GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID(container, prop_id, pspec); return; } switch (prop_id) { case CHILD_PROP_Z_POS: { g_value_set_uint(value, cc->z_pos); } break; case CHILD_PROP_OPACITY: { g_value_set_double(value, cc->opacity); } break; default: GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID(container, prop_id, pspec); break; } } static void ghb_compositor_init (GhbCompositor *compositor) { GTK_WIDGET_UNSET_FLAGS (compositor, GTK_NO_WINDOW); } GtkWidget* ghb_compositor_new (void) { return GTK_WIDGET(g_object_new (GHB_TYPE_COMPOSITOR, NULL)); } #if 0 static void showtype(const gchar *msg, GtkWidget *widget) { GType type; gchar *str; type = G_OBJECT_TYPE(widget); if (type == GTK_TYPE_DRAWING_AREA) str = "drawing area"; else if (type == GTK_TYPE_ALIGNMENT) str = "alignment"; else if (type == GTK_TYPE_EVENT_BOX) str = "event box"; else if (type == GTK_TYPE_EVENT_BOX) str = "event box"; else str = "unknown"; g_message("%s: %s", msg, str); } #endif static GList* find_drawables(GList *drawables, GtkWidget *widget) { if (!GTK_WIDGET_NO_WINDOW(widget)) { drawables = g_list_append(drawables, widget); return drawables; } if (GTK_IS_CONTAINER(widget)) { GList *children, *link; children = gtk_container_get_children(GTK_CONTAINER(widget)); // Look for a child with a window for (link = children; link != NULL; link = link->next) { if (!GTK_WIDGET_NO_WINDOW(GTK_WIDGET(link->data))) { drawables = g_list_append(drawables, link->data); } else { drawables = find_drawables(drawables, GTK_WIDGET(link->data)); } } } return drawables; } /** * ghb_compositor_zlist_insert: * @compositor: a #GhbCompositor * @child: widgets to insert * @z_pos: position * @opacity: global opacity for this widget * * Insert in the given position of the zlist in the compositor. * All children in the zlist must have associated GdkDrawable's * This means they must be GtkDrawingArea or GtkEventBox * **/ void ghb_compositor_zlist_insert ( GhbCompositor *compositor, GtkWidget *child, gint z_pos, gdouble opacity) { GhbCompositorChild *cc; GdkDisplay *display; g_return_if_fail (GHB_IS_COMPOSITOR (compositor)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == NULL); gtk_widget_set_parent(child, GTK_WIDGET(compositor)); display = gtk_widget_get_display (GTK_WIDGET(compositor)); cc = g_new(GhbCompositorChild, 1); cc->widget = child; cc->z_pos = z_pos; cc->opacity = opacity; cc->drawables = NULL; compositor->children = g_list_insert_sorted( compositor->children, cc, zsort); if (gdk_display_supports_composite(display)) { GList *link; cc->drawables = find_drawables(NULL, cc->widget); for (link = cc->drawables; link != NULL; link = link->next) { gtk_widget_realize(GTK_WIDGET(link->data)); gdk_window_set_composited(gtk_widget_get_window(GTK_WIDGET(link->data)), TRUE); } } } static void ghb_compositor_add(GtkContainer *container, GtkWidget *child) { GhbCompositor *compositor = GHB_COMPOSITOR(container); GhbCompositorChild *cc; gint z_pos = 0; GList *last = g_list_last(compositor->children); if (last != NULL) { cc = (GhbCompositorChild*)last->data; z_pos = cc->z_pos + 1; } ghb_compositor_zlist_insert(compositor, child, z_pos, 1.0); } static void ghb_compositor_remove(GtkContainer *container, GtkWidget *child) { GhbCompositor *compositor = GHB_COMPOSITOR(container); GhbCompositorChild *cc; GList *link; for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; if (cc->widget == child) { gboolean was_visible = gtk_widget_get_visible( child ); gtk_widget_unparent(child); compositor->children = g_list_remove(compositor->children, child); g_free(child); if (was_visible && gtk_widget_get_visible (GTK_WIDGET(container))) gtk_widget_queue_resize(GTK_WIDGET(container)); break; } } } static void ghb_compositor_forall( GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer data) { GhbCompositor *compositor = GHB_COMPOSITOR (container); GhbCompositorChild *cc; GList *link; for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; (*callback)(cc->widget, data); } } static void ghb_compositor_finalize (GObject *object) { GhbCompositor *compositor = GHB_COMPOSITOR (object); GhbCompositorChild *cc; GList *link; for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; g_list_free(cc->drawables); g_free(cc); } g_list_free(compositor->children); G_OBJECT_CLASS (ghb_compositor_parent_class)->finalize (object); } static void ghb_compositor_realize (GtkWidget *widget) { GdkWindowAttr attributes; gint attributes_mask; gint border_width; gboolean visible_window; GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); border_width = GTK_CONTAINER (widget)->border_width; attributes.x = widget->allocation.x + border_width; attributes.y = widget->allocation.y + border_width; attributes.width = widget->allocation.width - 2*border_width; attributes.height = widget->allocation.height - 2*border_width; attributes.window_type = GDK_WINDOW_CHILD; attributes.event_mask = gtk_widget_get_events (widget) | GDK_BUTTON_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_EXPOSURE_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK; visible_window = !GTK_WIDGET_NO_WINDOW (widget); GdkWindow *window; if (visible_window) { attributes.visual = gtk_widget_get_visual (widget); attributes.colormap = gtk_widget_get_colormap (widget); attributes.wclass = GDK_INPUT_OUTPUT; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; window = gdk_window_new(gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gtk_widget_set_window(widget, window); gdk_window_set_user_data(window, widget); } else { window = gtk_widget_get_parent_window (widget); gtk_widget_set_window(widget, window); g_object_ref (window); } widget->style = gtk_style_attach (widget->style, window); if (visible_window) gtk_style_set_background(widget->style, window, GTK_STATE_NORMAL); } static void ghb_compositor_unrealize (GtkWidget *widget) { GTK_WIDGET_CLASS (ghb_compositor_parent_class)->unrealize (widget); } static void ghb_compositor_size_request( GtkWidget *widget, GtkRequisition *requisition) { GhbCompositor *compositor = GHB_COMPOSITOR (widget); GList *link; GhbCompositorChild *cc; gint width = 0, height = 0; GtkRequisition child_requisition; for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; if (gtk_widget_get_visible(cc->widget)) { gtk_widget_size_request(cc->widget, NULL); gtk_widget_get_child_requisition(cc->widget, &child_requisition); width = MAX(child_requisition.width, width); height = MAX(child_requisition.height, height); } } requisition->width = width + GTK_CONTAINER (widget)->border_width * 2; requisition->height = height + GTK_CONTAINER (widget)->border_width * 2; } static void ghb_compositor_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GhbCompositor *compositor; GtkAllocation child_allocation; GhbCompositorChild *cc; GList *link; widget->allocation = *allocation; compositor = GHB_COMPOSITOR (widget); if (GTK_WIDGET_NO_WINDOW (widget)) { child_allocation.x = allocation->x + GTK_CONTAINER(widget)->border_width; child_allocation.y = allocation->y + GTK_CONTAINER(widget)->border_width; } else { child_allocation.x = 0; child_allocation.y = 0; } child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0); child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0); if (GTK_WIDGET_REALIZED (widget)) { if (!GTK_WIDGET_NO_WINDOW (widget)) { gdk_window_move_resize (gtk_widget_get_window(widget), allocation->x + GTK_CONTAINER (widget)->border_width, allocation->y + GTK_CONTAINER (widget)->border_width, child_allocation.width, child_allocation.height); } } for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; if (GTK_WIDGET_REALIZED (cc->widget)) gtk_widget_size_allocate (cc->widget, &child_allocation); } } static void ghb_compositor_blend (GtkWidget *widget, GdkEventExpose *event) { GhbCompositor *compositor = GHB_COMPOSITOR (widget); GList *link, *draw; GdkRegion *region; GtkWidget *child; cairo_t *cr; GhbCompositorChild *cc; if (compositor->children == NULL) return; /* create a cairo context to draw to the window */ cr = gdk_cairo_create (gtk_widget_get_window(widget)); for (link = compositor->children; link != NULL; link = link->next) { cc = (GhbCompositorChild*)link->data; for (draw = cc->drawables; draw != NULL; draw = draw->next) { /* get our child */ child = GTK_WIDGET(draw->data); if (!gtk_widget_get_visible(cc->widget) || !gtk_widget_get_visible(child)) continue; /* the source data is the (composited) event box */ gdk_cairo_set_source_pixmap (cr, gtk_widget_get_window(child), child->allocation.x, child->allocation.y); /* draw no more than our expose event intersects our child */ region = gdk_region_rectangle (&child->allocation); gdk_region_intersect (region, event->region); gdk_cairo_region (cr, region); cairo_clip (cr); /* composite, with an opacity */ cairo_set_operator (cr, CAIRO_OPERATOR_OVER); cairo_paint_with_alpha (cr, cc->opacity); cairo_reset_clip(cr); } } /* we're done */ cairo_destroy (cr); } static gboolean ghb_compositor_expose (GtkWidget *widget, GdkEventExpose *event) { if (GTK_WIDGET_DRAWABLE (widget)) { if (!GTK_WIDGET_NO_WINDOW (widget)) ghb_compositor_blend (widget, event); GTK_WIDGET_CLASS( ghb_compositor_parent_class)->expose_event(widget, event); } return FALSE; }