Adding split view divider widget.

athena/wm/bezel_controller.cc

Index: athena/wm/bezel_controller.cc
diff --git a/athena/wm/bezel_controller.cc b/athena/wm/bezel_controller.cc
index a4e815602e7b32ecee1667e88caf0962f71199d6..81f275f1159ac9bd65fde4f2ed9454835c1d32c3 100644
--- a/athena/wm/bezel_controller.cc
+++ b/athena/wm/bezel_controller.cc
@@ -46,6 +46,22 @@ float GetDistance(const gfx::PointF& location,
              : point_in_screen.x() - GetDisplay(window).bounds().width();
 }
 
+// Returns the bezel corresponding to the |location| in |window| or BEZEL_NONE
+// if the location is outside of the bezel area.
+// Only implemented for LEFT and RIGHT bezels ATM.
+BezelController::Bezel GetBezel(const gfx::PointF& location,
+                                aura::Window* window) {
+  int screen_width = GetDisplay(window).bounds().width();
+  gfx::Point point_in_screen(gfx::ToRoundedPoint(location));
+  wm::ConvertPointToScreen(window, &point_in_screen);
+  if (point_in_screen.x() < kBezelWidth)
+    return BezelController::BEZEL_LEFT;
+  else if (point_in_screen.x() > screen_width - kBezelWidth)
+    return BezelController::BEZEL_RIGHT;
+  else
+    return BezelController::BEZEL_NONE;
+}
+
 }  // namespace
 
 BezelController::BezelController(aura::Window* container)
@@ -79,18 +95,6 @@ void BezelController::SetState(BezelController::State state,
   }
 }
 
-// Only implemented for LEFT and RIGHT bezels ATM.
-BezelController::Bezel BezelController::GetBezel(const gfx::PointF& location) {
-  int screen_width = GetDisplay(container_).bounds().width();
-  if (location.x() < kBezelWidth) {
-    return BEZEL_LEFT;
-  } else if (location.x() > screen_width - kBezelWidth) {
-    return BEZEL_RIGHT;
-  } else {
-    return BEZEL_NONE;
-  }
-}
-
 void BezelController::OnGestureEvent(ui::GestureEvent* event) {
   // TODO(mfomitchev): Currently we aren't retargetting or consuming any of the
   // touch events. This means that content can prevent the generation of gesture
@@ -105,15 +109,23 @@ void BezelController::OnGestureEvent(ui::GestureEvent* event) {
   if (!ShouldProcessGesture(type))
     return;
 
+  const ui::GestureEventDetails& event_details = event->details();
+  int num_touch_points = event_details.touch_points();
+  if (num_touch_points == 1 && type == ui::ET_GESTURE_BEGIN) {
+    // Reset the state if needed.
+    // Normally, the state would be reset when ET_GESTURE_END is dispatched,
+    // however ET_GESTURE_END may not be dispatched if the gesture target is
+    // hidden or deleted before the gesture ends.
+    SetState(NONE);
+  }
+
   if (scroll_target_ && event->target() != scroll_target_)
     return;
 
   const gfx::PointF& event_location = event->location_f();
-  const ui::GestureEventDetails& event_details = event->details();
-  int num_touch_points = event_details.touch_points();
   float scroll_delta = kScrollDeltaNone;
+  aura::Window* target_window = static_cast<aura::Window*>(event->target());
   if (scroll_bezel_ != BEZEL_NONE) {
-    aura::Window* target_window = static_cast<aura::Window*>(event->target());
     scroll_delta = GetDistance(event_location, target_window, scroll_bezel_);
   }
 
@@ -122,7 +134,8 @@ void BezelController::OnGestureEvent(ui::GestureEvent* event) {
       SetState(IGNORE_CURRENT_SCROLL);
       return;
     }
-    BezelController::Bezel event_bezel = GetBezel(event->location_f());
+    BezelController::Bezel event_bezel =
+        GetBezel(event->location_f(), target_window);
     switch (state_) {
       case NONE:
         scroll_bezel_ = event_bezel;