[gtk/dnd-gestures-2: 109/175] gtk-demo: Use gtk_widget_add_controller for drag source

[Matthias Clasen <matthiasc src gnome org>]

commit 5ead639afbba16cda3d4e16639b5f0b32054800e
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 7 01:06:39 2020 -0500

    gtk-demo: Use gtk_widget_add_controller for drag source

 demos/gtk-demo/clipboard.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/clipboard.c b/demos/gtk-demo/clipboard.c
index 3da096060e..303ff313f6 100644
--- a/demos/gtk-demo/clipboard.c
+++ b/demos/gtk-demo/clipboard.c
@@ -344,9 +344,9 @@ do_clipboard (GtkWidget *do_widget)
 
       /* make image a drag source */
       source = gtk_drag_source_new ();
-      gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
       g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
       g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
+      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (source));
 
       /* accept drops on image */
       formats = gdk_content_formats_new (NULL, 0);
@@ -378,7 +378,7 @@ do_clipboard (GtkWidget *do_widget)
       source = gtk_drag_source_new ();
       g_signal_connect (source, "prepare", G_CALLBACK (prepare_drag), NULL);
       g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), image);
-      gtk_drag_source_attach (source, image, GDK_BUTTON1_MASK);
+      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (source));
 
       /* accept drops on image */
       formats = gdk_content_formats_new (NULL, 0);