1// Copyright (c) 2012 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 UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
6#define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
7
8#include <string>
9
10#include "base/compiler_specific.h"
11#include "base/gtest_prod_util.h"
12#include "ui/views/controls/scrollbar/scroll_bar.h"
13#include "ui/views/view.h"
14
15namespace ui {
16class NativeTheme;
17}
18
19namespace views {
20
21class NativeScrollBarWrapper;
22
23// The NativeScrollBar class is a scrollbar that uses platform's
24// native control.
25class VIEWS_EXPORT NativeScrollBar : public ScrollBar {
26 public:
27  // The scroll-bar's class name.
28  static const char kViewClassName[];
29
30  // Create new scrollbar, either horizontal or vertical.
31  explicit NativeScrollBar(bool is_horiz);
32  virtual ~NativeScrollBar();
33
34  // Return the system sizes.
35  static int GetHorizontalScrollBarHeight(const ui::NativeTheme* theme);
36  static int GetVerticalScrollBarWidth(const ui::NativeTheme* theme);
37
38 private:
39  friend class NativeScrollBarTest;
40  FRIEND_TEST_ALL_PREFIXES(NativeScrollBarTest, Scrolling);
41
42  // Overridden from View.
43  virtual gfx::Size GetPreferredSize() const OVERRIDE;
44  virtual void Layout() OVERRIDE;
45  virtual void ViewHierarchyChanged(
46      const ViewHierarchyChangedDetails& details) OVERRIDE;
47  virtual const char* GetClassName() const OVERRIDE;
48
49  // Overrideen from View for keyboard UI purpose.
50  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
51  virtual bool OnMouseWheel(const ui::MouseWheelEvent& e) OVERRIDE;
52
53  // Overridden from ui::EventHandler.
54  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
55
56  // Overridden from ScrollBar.
57  virtual void Update(int viewport_size,
58                      int content_size,
59                      int current_pos) OVERRIDE;
60  virtual int GetPosition() const OVERRIDE;
61  virtual int GetLayoutSize() const OVERRIDE;
62
63  // init border
64  NativeScrollBarWrapper* native_wrapper_;
65
66  DISALLOW_COPY_AND_ASSIGN(NativeScrollBar);
67};
68
69}  // namespace views
70
71#endif  // UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
72