Implemented swipe to close in overview mode.

ash/wm/overview/window_selector_item.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
 #include "base/compiler_specific.h"
@@ skipping 55 matching lines @@
   // label is read.
   void SendFocusAlert() const;
 
   // Sets if the item is dimmed in the overview. Changing the value will also
   // change the visibility of the transform windows.
   void SetDimmed(bool dimmed);
   bool dimmed() const { return dimmed_; }
 
   const gfx::Rect& target_bounds() const { return target_bounds_; }
 
+  // Called when a touch scroll begin event occurs on this selector item.
+  void OnScrollBegin();
+
+  // Called when a touch scroll update event occurs on this selector item.
+  void OnScrollUpdate(int delta_x);
+
+  // Called when a touch scroll end event occurs on this selector item. This may
+  // cause the window to be closed.
+  void OnScrollEnd(int delta_x);
+
+  // Called when a touch fling event occurs on this selector item. This may
+  // cause the window to be closed.
+  void OnFling(int delta_x, float velocity_x);
+
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // aura::WindowObserver:
   void OnWindowDestroying(aura::Window* window) override;
   void OnWindowTitleChanged(aura::Window* window) override;
 
  private:
   friend class WindowSelectorTest;
 
@@ skipping 13 matching lines @@
   // Creates the window label.
   void CreateWindowLabel(const base::string16& title);
 
   // Updates the close button's bounds. Any change in bounds will be animated
   // from the current bounds to the new bounds as per the |animation_type|.
   void UpdateCloseButtonLayout(OverviewAnimationType animation_type);
 
   // Updates the close buttons accessibility name.
   void UpdateCloseButtonAccessibilityName();
 
+  // Animates the |transform_window_| back to it's original overview mode
+  // position.
+  void ResetScrolledWindow();
+
+  // Returns the minimum distance at which a scroll gesture will cause this
+  // selector item to be closed.
+  int GetMinimumCloseDistance() const;
+
   // True if the item is being shown in the overview, false if it's being
   // filtered.
   bool dimmed_;
 
   // The root window this item is being displayed on.
   aura::Window* root_window_;
 
   // The contained Window's wrapper.
   ScopedTransformOverviewWindow transform_window_;
 
@@ skipping 17 matching lines @@
   // An easy to access close button for the window in this item. Owned by the
   // close_button_widget_.
   views::ImageButton* close_button_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_