• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // Copyright 2013 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_OVERLAY_SCROLL_BAR_H_
6 #define UI_VIEWS_CONTROLS_SCROLLBAR_OVERLAY_SCROLL_BAR_H_
7 
8 #include "ui/gfx/animation/slide_animation.h"
9 #include "ui/views/controls/scrollbar/base_scroll_bar.h"
10 
11 namespace views {
12 
13 // The transparent scrollbar which overlays its contents.
14 class VIEWS_EXPORT OverlayScrollBar : public BaseScrollBar {
15  public:
16   explicit OverlayScrollBar(bool horizontal);
17   virtual ~OverlayScrollBar();
18 
19  protected:
20   // BaseScrollBar overrides:
21   virtual gfx::Rect GetTrackBounds() const OVERRIDE;
22   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
23 
24   // ScrollBar overrides:
25   virtual int GetLayoutSize() const OVERRIDE;
26   virtual int GetContentOverlapSize() const OVERRIDE;
27   virtual void OnMouseEnteredScrollView(const ui::MouseEvent& event) OVERRIDE;
28   virtual void OnMouseExitedScrollView(const ui::MouseEvent& event) OVERRIDE;
29 
30   // View overrides:
31   virtual gfx::Size GetPreferredSize() const OVERRIDE;
32   virtual void Layout() OVERRIDE;
33   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
34 
35  private:
36   gfx::SlideAnimation animation_;
37   DISALLOW_COPY_AND_ASSIGN(OverlayScrollBar);
38 };
39 
40 }  // namespace views
41 
42 #endif  // UI_VIEWS_CONTROLS_SCROLLBAR_OVERLAY_SCROLL_BAR_H_
43