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https://gitlab.gnome.org/GNOME/gtk.git
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68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <gtk/gtk.h>
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static void
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draw_popup (GtkDrawingArea *da,
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cairo_t *cr,
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int width,
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int height,
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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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}
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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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gint width, height;
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gdouble x, y;
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gtk_window_get_size (GTK_WINDOW (popup), &width, &height);
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gdk_event_get_root_coords (event, &x, &y);
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gtk_window_move (GTK_WINDOW (popup),
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(int) x - width / 2,
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(int) y - height / 2);
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return FALSE;
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}
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static gboolean
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on_map (GtkWidget *parent)
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{
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GtkWidget *popup, *da;
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popup = gtk_window_new (GTK_WINDOW_POPUP);
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da = gtk_drawing_area_new ();
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gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_popup, NULL, NULL);
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gtk_container_add (GTK_CONTAINER (popup), da);
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gtk_widget_set_size_request (GTK_WIDGET (popup), 20, 20);
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gtk_window_set_transient_for (GTK_WINDOW (popup), GTK_WINDOW (parent));
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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 ();
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (window, "destroy", gtk_main_quit, NULL);
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g_signal_connect (window, "map", G_CALLBACK (on_map), 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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