Add gdk_frame_clock_begin/end_updating()

Add an API to start or stop continually updating the frame clock.
This is a slight convenience for applcations and avoids the problem
of getting one more frame run after an animation stops, but the
primary motivation for this is because it looks like we might have
to use timeBeginPeriod()/timeEndPeriod() on Windows to get reasonably
accurate timing, and for that we'll need to know if there is an
animation running.

https://bugzilla.gnome.org/show_bug.cgi?id=693934

1 files changed, 5 insertions, 0 deletions

diff --git a/gdk/gdkframeclock.h b/gdk/gdkframeclock.h
index f6529795af..a82d5cf594 100644
--- a/gdk/gdkframeclock.h
+++ b/gdk/gdkframeclock.h
@@ -82,6 +82,11 @@ GDK_AVAILABLE_IN_3_8
 void               gdk_frame_clock_request_phase (GdkFrameClock      *frame_clock,
                                                   GdkFrameClockPhase  phase);
 
+GDK_AVAILABLE_IN_3_8
+void               gdk_frame_clock_begin_updating (GdkFrameClock      *frame_clock);
+GDK_AVAILABLE_IN_3_8
+void               gdk_frame_clock_end_updating   (GdkFrameClock      *frame_clock);
+
 /* Frame history */
 GDK_AVAILABLE_IN_3_8
 gint64           gdk_frame_clock_get_frame_counter (GdkFrameClock *frame_clock);