forked from AuroraMiddleware/gtk
6e0960197f
Just to have some code that uses subsurfaces inside a widget tree, and not like a 'pseudo-toplevel'.
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
#include <gtk/gtk.h>
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static void da_realize (GtkWidget *widget);
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static void da_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean da_draw (GtkWidget *widget,
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cairo_t *cr);
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typedef GtkDrawingArea DArea;
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typedef GtkDrawingAreaClass DAreaClass;
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G_DEFINE_TYPE (DArea, da, GTK_TYPE_WIDGET)
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static void
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da_class_init (DAreaClass *class)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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widget_class->realize = da_realize;
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widget_class->size_allocate = da_size_allocate;
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widget_class->draw = da_draw;
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}
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static void
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da_init (DArea *darea)
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{
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gtk_widget_set_has_window (GTK_WIDGET (darea), TRUE);
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}
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GtkWidget*
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da_new (void)
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{
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return g_object_new (da_get_type (), NULL);
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}
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static void
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da_realize (GtkWidget *widget)
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{
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GtkAllocation allocation;
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GdkWindow *window;
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GdkWindowAttr attributes;
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gint attributes_mask;
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gtk_widget_set_realized (widget, TRUE);
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gtk_widget_get_allocation (widget, &allocation);
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attributes.window_type = GDK_WINDOW_SUBSURFACE;
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attributes.x = allocation.x;
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attributes.y = allocation.y;
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attributes.width = allocation.width;
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attributes.height = allocation.height;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
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window = gdk_window_new (gtk_widget_get_parent_window (widget),
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&attributes, attributes_mask);
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gtk_widget_register_window (widget, window);
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gtk_widget_set_window (widget, window);
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}
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static void
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da_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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gtk_widget_set_allocation (widget, allocation);
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if (gtk_widget_get_realized (widget))
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gdk_window_move_resize (gtk_widget_get_window (widget),
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allocation->x, allocation->y,
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allocation->width, allocation->height);
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}
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static gboolean
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da_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
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cairo_paint (cr);
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return TRUE;
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *window, *label, *box, *widget;
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gtk_init (NULL, NULL);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_container_add (GTK_CONTAINER (window), box);
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label = gtk_label_new ("Test test");
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gtk_container_add (GTK_CONTAINER (box), label);
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widget = da_new ();
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gtk_widget_set_size_request (widget, 100, 100);
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gtk_container_add (GTK_CONTAINER (box), widget);
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gtk_widget_show_all (window);
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gtk_main ();
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return 0;
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}
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