Commit 23b2b493 authored by Matthias Clasen's avatar Matthias Clasen
Browse files

x11: Implement drag cancel animation

Showing the drag cancel animation can be done in the X11
drag context implementation now that we hold the drag
window there, and have the start coordinates.

Since we can't control if and when the application destroys
the drag widget, we take a snapshot of the window contents
and display that during the animation. This should be good
enough for all practical purposes.
parent c590b833
......@@ -193,6 +193,8 @@ static GdkWindow * gdk_x11_drag_context_get_drag_window (GdkDragContext *context
static void gdk_x11_drag_context_set_hotspot (GdkDragContext *context,
gint hot_x,
gint hot_y);
static void gdk_x11_drag_context_drop_done (GdkDragContext *context,
gboolean success);
static void
gdk_x11_drag_context_class_init (GdkX11DragContextClass *klass)
......@@ -213,6 +215,7 @@ gdk_x11_drag_context_class_init (GdkX11DragContextClass *klass)
context_class->get_selection = gdk_x11_drag_context_get_selection;
context_class->get_drag_window = gdk_x11_drag_context_get_drag_window;
context_class->set_hotspot = gdk_x11_drag_context_set_hotspot;
context_class->drop_done = gdk_x11_drag_context_drop_done;
static void
......@@ -2486,3 +2489,94 @@ gdk_x11_drag_context_set_hotspot (GdkDragContext *context,
x11_context->hot_x = hot_x;
x11_context->hot_y = hot_y;
static double
ease_out_cubic (double t)
double p = t - 1;
return p * p * p + 1;
#define ANIM_TIME 500000 /* half a second */
typedef struct _GdkDragAnim GdkDragAnim;
struct _GdkDragAnim {
GdkX11DragContext *context;
GdkFrameClock *frame_clock;
gint64 start_time;
static void
gdk_drag_anim_destroy (GdkDragAnim *anim)
g_object_unref (anim->context);
g_slice_free (GdkDragAnim, anim);
static gboolean
gdk_drag_anim_timeout (gpointer data)
GdkDragAnim *anim = data;
GdkX11DragContext *context = anim->context;
GdkFrameClock *frame_clock = anim->frame_clock;
gint64 current_time;
double f;
double t;
if (!frame_clock)
current_time = gdk_frame_clock_get_frame_time (frame_clock);
f = (current_time - anim->start_time) / (double) ANIM_TIME;
if (f >= 1.0)
t = ease_out_cubic (f);
gdk_window_show (context->drag_window);
gdk_window_move (context->drag_window,
context->last_x + (context->start_x - context->last_x) * t,
context->last_y + (context->start_y - context->last_y) * t);
gdk_window_set_opacity (context->drag_window, 1.0 - f);
static void
gdk_x11_drag_context_drop_done (GdkDragContext *context,
gboolean success)
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkDragAnim *anim;
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
if (success)
pixbuf = gdk_pixbuf_get_from_window (x11_context->drag_window,
0, 0,
gdk_window_get_width (x11_context->drag_window),
gdk_window_get_height (x11_context->drag_window));
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 0, x11_context->drag_window);
pattern = cairo_pattern_create_for_surface (surface);
gdk_window_set_background_pattern (x11_context->drag_window, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
g_object_unref (pixbuf);
anim = g_slice_new0 (GdkDragAnim);
anim->context = g_object_ref (x11_context);
anim->frame_clock = gdk_window_get_frame_clock (x11_context->drag_window);
anim->start_time = gdk_frame_clock_get_frame_time (anim->frame_clock);
gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 17,
gdk_drag_anim_timeout, anim,
(GDestroyNotify) gdk_drag_anim_destroy);
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