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 15 matching lines @@
 }
 
 namespace ash {
 
 // This class represents an item in overview mode.
 class ASH_EXPORT WindowSelectorItem : public views::ButtonListener,
                                       public aura::WindowObserver {
  public:
   class OverviewLabelButton : public views::LabelButton {
    public:
-    OverviewLabelButton(views::ButtonListener* listener,
+    OverviewLabelButton(WindowSelectorItem* selector_item,
                         const base::string16& text);
 
     ~OverviewLabelButton() override;
 
     void set_top_padding(int top_padding) { top_padding_ = top_padding; }
 
+    // views::LabelButton:
+    void OnGestureEvent(ui::GestureEvent* event) override;
+
    protected:
     // views::LabelButton:
     gfx::Rect GetChildAreaBounds() override;
 
    private:
+    // The WindowSelectorItem that the touch gestures are delegated to.
+    // Not owned.
+    WindowSelectorItem* selector_item_;
+
     // Padding on top of the button.
     int top_padding_;
 
     DISALLOW_COPY_AND_ASSIGN(OverviewLabelButton);
   };
 
   explicit WindowSelectorItem(aura::Window* window);
   ~WindowSelectorItem() override;
 
   aura::Window* GetWindow();
@@ skipping 29 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_; }
 
+  // Handles the gestures on the Window
+  void OnGestureEvent(ui::GestureEvent* event);
+
   // 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 11 matching lines @@
   // View for the label under the window.
   OverviewLabelButton* window_label_button_view_;
 
   // The close buttons widget container.
   views::Widget close_button_widget_;
 
   // An easy to access close button for the window in this item. Owned by the
   // close_button_widget_.
   views::ImageButton* close_button_;
 
+  // The original X location for a scroll begin event. |original_x_| is in the
+  // local coordinate space of |window_label_button_view_|.
+  float scroll_x_origin_;
+
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_