a69285da08
When we have pending motion events, instead of delivering them directly, request the new FLUSH_EVENTS phase of the frame clock. This allows us to compress repeated motion events sent to the same window. In the FLUSH_EVENTS phase, which occur at priority GDK_PRIORITY_EVENTS + 1, we deliver any pending motion events then turn off event delivery until the end of the next frame. Turning off event delivery means that we'll reliably paint the compressed motion events even if more have arrived. Add a motion-compression test case which demonstrates behavior when an application takes too long handle motion events. It is unusable without this patch but behaves fine with the patch. https://bugzilla.gnome.org/show_bug.cgi?id=685460
122 lines
5.0 KiB
C
122 lines
5.0 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2010. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
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#error "Only <gdk/gdk.h> can be included directly."
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#endif
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#ifndef __GDK_FRAME_CLOCK_H__
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#define __GDK_FRAME_CLOCK_H__
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#include <glib-object.h>
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G_BEGIN_DECLS
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typedef struct _GdkFrameClock GdkFrameClock;
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typedef struct _GdkFrameClockInterface GdkFrameClockInterface;
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typedef struct _GdkFrameClockTarget GdkFrameClockTarget;
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typedef struct _GdkFrameClockTargetInterface GdkFrameClockTargetInterface;
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#define GDK_TYPE_FRAME_CLOCK_TARGET (gdk_frame_clock_target_get_type ())
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#define GDK_FRAME_CLOCK_TARGET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_FRAME_CLOCK_TARGET, GdkFrameClockTarget))
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#define GDK_IS_FRAME_CLOCK_TARGET(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_FRAME_CLOCK_TARGET))
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#define GDK_FRAME_CLOCK_TARGET_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GDK_TYPE_FRAME_CLOCK_TARGET, GdkFrameClockTargetInterface))
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struct _GdkFrameClockTargetInterface
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{
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GTypeInterface base_iface;
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void (*set_clock) (GdkFrameClockTarget *target,
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GdkFrameClock *clock);
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};
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GType gdk_frame_clock_target_get_type (void) G_GNUC_CONST;
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void gdk_frame_clock_target_set_clock (GdkFrameClockTarget *target,
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GdkFrameClock *clock);
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#define GDK_TYPE_FRAME_CLOCK (gdk_frame_clock_get_type ())
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#define GDK_FRAME_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_FRAME_CLOCK, GdkFrameClock))
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#define GDK_IS_FRAME_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_FRAME_CLOCK))
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#define GDK_FRAME_CLOCK_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GDK_TYPE_FRAME_CLOCK, GdkFrameClockInterface))
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typedef enum {
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GDK_FRAME_CLOCK_PHASE_NONE = 0,
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GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS = 1 << 0,
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GDK_FRAME_CLOCK_PHASE_BEFORE_PAINT = 1 << 1,
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GDK_FRAME_CLOCK_PHASE_UPDATE = 1 << 2,
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GDK_FRAME_CLOCK_PHASE_LAYOUT = 1 << 3,
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GDK_FRAME_CLOCK_PHASE_PAINT = 1 << 4,
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GDK_FRAME_CLOCK_PHASE_AFTER_PAINT = 1 << 5,
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GDK_FRAME_CLOCK_PHASE_RESUME_EVENTS = 1 << 6
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} GdkFrameClockPhase;
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struct _GdkFrameClockInterface
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{
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GTypeInterface base_iface;
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guint64 (* get_frame_time) (GdkFrameClock *clock);
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void (* request_phase) (GdkFrameClock *clock,
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GdkFrameClockPhase phase);
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GdkFrameClockPhase (* get_requested) (GdkFrameClock *clock);
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void (* freeze) (GdkFrameClock *clock);
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void (* thaw) (GdkFrameClock *clock);
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/* signals */
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/* void (* frame_requested) (GdkFrameClock *clock); */
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/* void (* flush_events) (GdkFrameClock *clock); */
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/* void (* before_paint) (GdkFrameClock *clock); */
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/* void (* update) (GdkFrameClock *clock); */
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/* void (* layout) (GdkFrameClock *clock); */
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/* void (* paint) (GdkFrameClock *clock); */
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/* void (* after_paint) (GdkFrameClock *clock); */
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/* void (* resume_events) (GdkFrameClock *clock); */
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};
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GType gdk_frame_clock_get_type (void) G_GNUC_CONST;
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guint64 gdk_frame_clock_get_frame_time (GdkFrameClock *clock);
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void gdk_frame_clock_request_phase (GdkFrameClock *clock,
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GdkFrameClockPhase phase);
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GdkFrameClockPhase gdk_frame_clock_get_requested (GdkFrameClock *clock);
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void gdk_frame_clock_freeze (GdkFrameClock *clock);
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void gdk_frame_clock_thaw (GdkFrameClock *clock);
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/* Convenience API */
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void gdk_frame_clock_get_frame_time_val (GdkFrameClock *clock,
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GTimeVal *timeval);
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/* Signal emitters (used in frame clock implementations) */
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void gdk_frame_clock_frame_requested (GdkFrameClock *clock);
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G_END_DECLS
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#endif /* __GDK_FRAME_CLOCK_H__ */
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