AppLauncher Touch Feedback

ash/shelf/app_list_button.h

 // Copyright 2014 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_SHELF_APP_LIST_BUTTON_H_
 #define ASH_SHELF_APP_LIST_BUTTON_H_
 
 #include "ui/views/controls/button/image_button.h"
 
 namespace ash {
 class ShelfButtonHost;
 class ShelfWidget;
 
 // Button used for the AppList icon on the shelf.
 class AppListButton : public views::ImageButton {
  public:
   // Bounds size (inset) required for the app icon image (in pixels).
   static const int kImageBoundsSize;
 
   AppListButton(views::ButtonListener* listener,
                 ShelfButtonHost* host,
                 ShelfWidget* shelf_widget);
   virtual ~AppListButton();
 
+  bool draw_background_as_active() {
+    return draw_background_as_active_;
+  }
+
  protected:
   // views::ImageButton overrides:
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
 
   // ui::EventHandler overrides:
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
+  // Toggles the active state for painting the background and schedules a paint.
+  void SetDrawBackgroundAsActive(bool draw_background_as_active);
+
+  // True if the background should render as active, regardless of the state of
+  // the application list.
+  bool draw_background_as_active_;
+
+  // True if touch view feedback command line flag has been enabled. When
+  // enabled touch gestures will toggle rendering the background as active.
+  bool touch_feedback_enabled_;
+
   ShelfButtonHost* host_;
   // Reference to the shelf widget containing this button, owned by the
   // root window controller.
   ShelfWidget* shelf_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListButton);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_APP_LIST_BUTTON_H_