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demo: Add a dnd special-case for textures

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If the DND/clipboard machinery knows a texture is a texture, it will try
to serialize it. Paintables can't be serialized, so it wouldn't try.
This commit is contained in:
Benjamin Otte 2021-08-19 02:15:59 +02:00
parent 1596fdeba3
commit 7bc1c9a562
1 changed files with 10 additions and 2 deletions
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12
demos/gtk-demo/demoimage.c
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@ -100,7 +100,11 @@ prepare_drag (GtkDragSource *source,
DemoImage *demo = DEMO_IMAGE (widget);
GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
return gdk_content_provider_new_typed (GDK_TYPE_PAINTABLE, paintable);
/* Textures can be serialized, paintables can't, so special case the textures */
if (GDK_IS_TEXTURE (paintable))
return gdk_content_provider_new_typed (GDK_TYPE_TEXTURE, paintable);
else
return gdk_content_provider_new_typed (GDK_TYPE_PAINTABLE, paintable);
}
static gboolean
@ -129,7 +133,11 @@ copy_image (GtkWidget *widget,
GdkPaintable *paintable = get_image_paintable (GTK_IMAGE (demo->image));
GValue value = G_VALUE_INIT;
g_value_init (&value, GDK_TYPE_PAINTABLE);
/* Textures can be serialized, paintables can't, so special case the textures */
if (GDK_IS_TEXTURE (paintable))
g_value_init (&value, GDK_TYPE_TEXTURE);
else
g_value_init (&value, GDK_TYPE_PAINTABLE);
g_value_set_object (&value, paintable);
gdk_clipboard_set_value (clipboard, &value);
g_value_unset (&value);