Status Panel Touch Feedback

ash/system/tray/tray_popup_item_container.h

+// Copyright (c) 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_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_
+#define ASH_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_
+
+#include "ui/views/view.h"
+
+namespace ash {
+
+// A view which can optionally change the background color when a mouse is
+// hovering or a user is interacting via touch.
+class TrayPopupItemContainer : public views::View {
+ public:
+  TrayPopupItemContainer(views::View* view,
+                         bool change_background,
+                         bool draw_border);
+
+  virtual ~TrayPopupItemContainer();
+
+  bool active() {
+    return active_;
+  }
+
+ private:
+  // Sets whether the active background is to be used, and triggers a paint.
+  void SetActive(bool active);
+
+  // views::View:
+  virtual void ChildVisibilityChanged(views::View* child) override;
+  virtual void ChildPreferredSizeChanged(views::View* child) override;
+  virtual void OnMouseEntered(const ui::MouseEvent& event) override;
+  virtual void OnMouseExited(const ui::MouseEvent& event) override;
+  virtual void OnGestureEvent(ui::GestureEvent* event) override;
+  virtual void OnPaintBackground(gfx::Canvas* canvas) override;
+
+  // True if either a mouse is hovering over this view, or if a user has touched
+  // down.
+  bool active_;
+
+  // True if mouse hover and touch feedback can alter the background color of
+  // the container.
+  bool change_background_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayPopupItemContainer);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_TRAY_TRAY_POPUP_ITEM_CONTAINER_H_