Adding four bezel gestures

ash/wm/system_gesture_event_filter.h

Index: ash/wm/system_gesture_event_filter.h
diff --git a/ash/wm/system_gesture_event_filter.h b/ash/wm/system_gesture_event_filter.h
index fe58711d7e1b350812e4f8072f267b70f8da20aa..ac5af44beb376d239b6a5dccd0f05658191db44f 100644
--- a/ash/wm/system_gesture_event_filter.h
+++ b/ash/wm/system_gesture_event_filter.h
@@ -18,6 +18,20 @@ class Window;
 namespace ash {
 namespace internal {
 
+typedef enum {

[sky, 2012/05/11 17:00:01]

use C++ style, eg enum BezelStart ... Also, the values should be UPPER_CASE.

[Mr4D (OOO till 08-26), 2012/05/11 18:09:59]

Done.

+  bezel_start_unset = 0,
+  bezel_start_top,
+  bezel_start_left,
+  bezel_start_right,
+  bezel_start_bottom
+} BezelStart;
+
+typedef enum {
+  scroll_orientation_unset = 0,
+  scroll_orientation_horizontal,
+  scroll_orientation_vertical
+} ScrollOrientation;
+
 // An event filter which handles system level gesture events.
 class SystemGestureEventFilter : public aura::EventFilter {
  public:
@@ -36,6 +50,34 @@ class SystemGestureEventFilter : public aura::EventFilter {
       aura::GestureEvent* event) OVERRIDE;
 
  private:
+  // The percentage of the screen to the left and right which belongs to
+  // device gestures.
+  const int kOverlapPercent;

[sky, 2012/05/11 17:00:01]

overlap_percent_

[Mr4D (OOO till 08-26), 2012/05/11 18:09:59]

Done.

+
+  // Which bezel corner are we on.
+  BezelStart start_location_;
+
+  // Which orientation are we moving.
+  ScrollOrientation orientation_;
+
+  // A device swipe gesture is in progress.
+  bool is_scrubbing_;
+
+  // The touch id of the device swipe gesture.
+  int touch_id_;
+
+  // Handle events meant for volume / brightness. Returns true when no further
+  // events from this gesture should be sent.
+  bool HandleDeviceControl(aura::GestureEvent* event);

[sky, 2012/05/11 17:00:01]

methods before fields.

[Mr4D (OOO till 08-26), 2012/05/11 18:09:59]

Done.

+
+  // Handle events meant for showing the launcher. Returns true when no further
+  // events from this gesture should be sent.
+  bool HandleLauncherControl(aura::GestureEvent* event);
+
+  // Handle events meant to switch through applications. Returns true when no
+  // further events from this gesture should be sent.
+  bool HandleApplicationControl(aura::GestureEvent* event);
+
   DISALLOW_COPY_AND_ASSIGN(SystemGestureEventFilter);
 };