28f011eb05
Quite a few applications use GTK_WINDOW_POPUP to create various temporary windows and place then on screen. That works fine on X11 but on Wayland there is no global coordinate system for regular surfaces. If the application is using a gdk temp window and set a parent with gtk_window_transient_for(), the gdk wayland backend has all it needs to create a subsurface that can be placed at will by the application. Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=759738
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#include <gtk/gtk.h>
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static gboolean
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draw_popup (GtkWidget *widget,
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cairo_t *cr,
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gpointer data)
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{
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cairo_set_source_rgb (cr, 1, 0, 0);
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cairo_paint (cr);
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return FALSE;
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}
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static gboolean
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place_popup (GtkWidget *parent,
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GdkEvent *event,
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GtkWidget *popup)
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{
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GdkEventMotion *ev_motion = (GdkEventMotion *) event;
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gint width, height;
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gtk_window_get_size (GTK_WINDOW (popup), &width, &height);
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gtk_window_move (GTK_WINDOW (popup),
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(int) ev_motion->x_root - width / 2,
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(int) ev_motion->y_root - height / 2);
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return FALSE;
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}
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static gboolean
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on_map_event (GtkWidget *parent,
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GdkEvent *event,
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gpointer data)
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{
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GtkWidget *popup;
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popup = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_widget_set_size_request (GTK_WIDGET (popup), 20, 20);
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gtk_widget_set_app_paintable (GTK_WIDGET (popup), TRUE);
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gtk_window_set_transient_for (GTK_WINDOW (popup), GTK_WINDOW (parent));
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g_signal_connect (popup, "draw", G_CALLBACK (draw_popup), NULL);
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g_signal_connect (parent, "motion-notify-event", G_CALLBACK (place_popup), popup);
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gtk_widget_show (popup);
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return FALSE;
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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;
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gtk_init (&argc, &argv);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_widget_set_events (window, GDK_POINTER_MOTION_MASK);
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g_signal_connect (window, "destroy", gtk_main_quit, NULL);
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g_signal_connect (window, "map-event", G_CALLBACK (on_map_event), NULL);
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gtk_widget_show (window);
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gtk_main ();
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return 0;
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}
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