// Copyright (c) 2010 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 VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
#define VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
#pragma once

#include "views/view.h"

namespace views {

class SubmenuView;

// MenuScrollViewContainer contains the SubmenuView (through a MenuScrollView)
// and two scroll buttons. The scroll buttons are only visible and enabled if
// the preferred height of the SubmenuView is bigger than our bounds.
class MenuScrollViewContainer : public View {
 public:
  explicit MenuScrollViewContainer(SubmenuView* content_view);

  // Returns the buttons for scrolling up/down.
  View* scroll_down_button() const { return scroll_down_button_; }
  View* scroll_up_button() const { return scroll_up_button_; }

  // View overrides.
  virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
  virtual void Layout() OVERRIDE;
  virtual gfx::Size GetPreferredSize() OVERRIDE;
  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;

 protected:
  // View override.
  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;

 private:
  class MenuScrollView;

  // The scroll buttons.
  View* scroll_up_button_;
  View* scroll_down_button_;

  // The scroll view.
  MenuScrollView* scroll_view_;

  // The content view.
  SubmenuView* content_view_;

  DISALLOW_COPY_AND_ASSIGN(MenuScrollViewContainer);
};

}  // namespace views

#endif  // VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_