1 /* 2 * Copyright (c) 2008, 2009, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef FramelessScrollView_h 32 #define FramelessScrollView_h 33 34 #include "ScrollView.h" 35 36 namespace WebCore { 37 38 class FramelessScrollViewClient; 39 class PlatformKeyboardEvent; 40 class PlatformMouseEvent; 41 class PlatformWheelEvent; 42 43 // A FramelessScrollView is a ScrollView that can be used to render custom 44 // content, which does not have an associated Frame. 45 // 46 // NOTE: It may be better to just develop a custom subclass of Widget that 47 // can have scroll bars for this instead of trying to reuse ScrollView. 48 // 49 class FramelessScrollView : public ScrollView { 50 public: 51 FramelessScrollView() : m_client(0) {} 52 ~FramelessScrollView(); 53 54 FramelessScrollViewClient* client() const { return m_client; } 55 void setClient(FramelessScrollViewClient* client) { m_client = client; } 56 57 // Event handlers that subclasses must implement. 58 virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0; 59 virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0; 60 virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0; 61 virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0; 62 virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0; 63 64 // ScrollbarClient public methods: 65 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&); 66 virtual bool isActive() const; 67 68 // Widget public methods: 69 virtual void invalidateRect(const IntRect&); 70 71 // ScrollView public methods: 72 virtual HostWindow* hostWindow() const; 73 virtual IntRect windowClipRect(bool clipToContents = true) const; 74 75 protected: 76 // ScrollView protected methods: 77 virtual void paintContents(GraphicsContext*, const IntRect& damageRect); 78 virtual void contentsResized(); 79 virtual void visibleContentsResized(); 80 81 private: 82 FramelessScrollViewClient* m_client; 83 }; 84 85 } // namespace WebCore 86 87 #endif 88
