1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
6#define CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
7#pragma once
8
9#include <vector>
10
11#include "base/basictypes.h"
12#include "ui/base/animation/animation_delegate.h"
13#include "ui/base/animation/slide_animation.h"
14#include "views/view.h"
15
16class PanelScrollerHeader;
17
18class PanelScroller : public views::View, public ui::AnimationDelegate {
19 public:
20  PanelScroller();
21  ~PanelScroller();
22
23  static PanelScroller* CreateWindow();
24
25  // Overridden from View:
26  virtual void ViewHierarchyChanged(bool is_add,
27                                    views::View* parent,
28                                    views::View* child) OVERRIDE;
29  virtual gfx::Size GetPreferredSize() OVERRIDE;
30  virtual void Layout() OVERRIDE;
31  virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE;
32  virtual bool OnMouseDragged(const views::MouseEvent& event) OVERRIDE;
33
34  // Called when a panel header is clicked with the affected container. This
35  // function will make sure the panel is fully visible.
36  void HeaderClicked(PanelScrollerHeader* source);
37
38 private:
39  struct Panel;
40
41  // ui::AnimationDelegate overrides.
42  virtual void AnimationProgressed(const ui::Animation* animation);
43
44  // Scrolls to the panel at the given index. It will be moved to the top.
45  void ScrollToPanel(int index);
46
47  // All panels in this scroller.
48  std::vector<Panel*> panels_;
49
50  // Height in pixels of the headers above each panel.
51  int divider_height_;
52
53  bool needs_layout_;
54
55  // The current scroll position.
56  int scroll_pos_;
57
58  ui::SlideAnimation animation_;
59
60  // When animating a scroll, these indicate the beginning and ending of the
61  // scroll. The scroll_pos_ always indicates the current one.
62  int animated_scroll_begin_;
63  int animated_scroll_end_;
64
65  DISALLOW_COPY_AND_ASSIGN(PanelScroller);
66};
67
68#endif  // CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
69
70