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 "ash/wm/overview/transparent_activate_window_button.h"
 #include "ash/wm/overview/transparent_activate_window_button_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/image_button.h"
 
 namespace aura {
 class Window;
-}
+}  // namespace aura
 
 namespace views {
 class Label;
 class Widget;
-}
+}  // namespace views
 
 namespace ash {
 
 // This class represents an item in overview mode. An item can have one or more
 // windows, of which only one can be activated by keyboard (i.e. alt+tab) but
 // any can be selected with a pointer (touch or mouse).
 class ASH_EXPORT WindowSelectorItem
     : public views::ButtonListener,
       public aura::WindowObserver,
       public TransparentActivateWindowButtonDelegate {
@@ skipping 58 matching lines @@
 
   const gfx::Rect& target_bounds() const { return target_bounds_; }
 
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // aura::WindowObserver:
   void OnWindowTitleChanged(aura::Window* window) override;
 
   // ash::TransparentActivateWindowButtonDelegate:
+  void Scroll(int delta_x) override;
+  void CancelScroll() override;
   void Select() override;
+  void Close() override;
 
  private:
   friend class WindowSelectorTest;
 
   typedef ScopedVector<ScopedTransformOverviewWindow> TransformWindows;
 
   // Sets the bounds of this selector's items to |target_bounds| in
   // |root_window|. The bounds change will be animated as specified
   // by |animation_type|.
   void SetItemBounds(aura::Window* root_window,
                      const gfx::Rect& target_bounds,
                      OverviewAnimationType animation_type);
 
   // Changes the opacity of all the windows the item owns.
   void SetOpacity(float opacity);
 
   // Updates the window label's bounds to |target_bounds|. Will create a new
   // window label and fade it in if it doesn't exist. The bounds change is
   // animated as specified by the |animation_type|.
   void UpdateWindowLabels(const gfx::Rect& target_bounds,
                           OverviewAnimationType animation_type);
 
   // Initializes window_label_.
   void CreateWindowLabel(const base::string16& title);
 
+  // Set the minimum distance, in pixels, for which a scroll gesture will cause
+  // a window to be closed when the scroll distance exceeds |distance|.
+  void SetCloseWindowDistanceMinimum(int distance);
+
   // Updates the bounds and accessibility names for all the transparent
   // overlays.
   void UpdateSelectorButtons();
 
   // 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();
@@ skipping 37 matching lines @@
 
   // List of all Windows added to this and their associated helper classes.
   TransformWindows transform_windows_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_