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/base/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() OVERRIDE; 32 virtual void Layout() OVERRIDE; 33 virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE; 34 35 private: 36 ui::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
