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31 #ifndef FramelessScrollView_h
32 #define FramelessScrollView_h
34 #include "platform/PlatformExport.h"
35 #include "platform/scroll/ScrollView.h"
39 class FramelessScrollViewClient;
40 class PlatformGestureEvent;
41 class PlatformKeyboardEvent;
42 class PlatformMouseEvent;
43 class PlatformTouchEvent;
44 class PlatformWheelEvent;
46 // A FramelessScrollView is a ScrollView that can be used to render custom
47 // content, which does not have an associated LocalFrame.
49 // NOTE: It may be better to just develop a custom subclass of Widget that
50 // can have scroll bars for this instead of trying to reuse ScrollView.
52 class PLATFORM_EXPORT FramelessScrollView : public ScrollView {
54 FramelessScrollView() : m_client(0) { }
55 virtual ~FramelessScrollView();
57 FramelessScrollViewClient* client() const { return m_client; }
58 void setClient(FramelessScrollViewClient* client) { m_client = client; }
60 // Event handlers that subclasses must implement.
61 virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0;
62 virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0;
63 virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0;
64 virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0;
65 virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0;
66 virtual bool handleTouchEvent(const PlatformTouchEvent&) = 0;
67 virtual bool handleGestureEvent(const PlatformGestureEvent&) = 0;
69 // ScrollableArea public methods:
70 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE;
71 virtual bool isActive() const OVERRIDE;
72 virtual bool scrollbarsCanBeActive() const OVERRIDE;
73 virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
75 // Widget public methods:
76 virtual void invalidateRect(const IntRect&) OVERRIDE;
78 // ScrollView public methods:
79 virtual HostWindow* hostWindow() const OVERRIDE;
80 virtual IntRect windowClipRect(IncludeScrollbarsInRect = ExcludeScrollbars) const OVERRIDE;
83 // ScrollView protected methods:
84 virtual void paintContents(GraphicsContext*, const IntRect&) OVERRIDE;
85 virtual void contentsResized() OVERRIDE;
86 virtual void scrollbarExistenceDidChange() OVERRIDE;
89 FramelessScrollViewClient* m_client;