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 "core/platform/ScrollView.h" 35 36 namespace WebCore { 37 38 class FramelessScrollViewClient; 39 class PlatformGestureEvent; 40 class PlatformKeyboardEvent; 41 class PlatformMouseEvent; 42 class PlatformTouchEvent; 43 class PlatformWheelEvent; 44 45 // A FramelessScrollView is a ScrollView that can be used to render custom 46 // content, which does not have an associated Frame. 47 // 48 // NOTE: It may be better to just develop a custom subclass of Widget that 49 // can have scroll bars for this instead of trying to reuse ScrollView. 50 // 51 class FramelessScrollView : public ScrollView { 52 public: 53 FramelessScrollView() : m_client(0) {} 54 ~FramelessScrollView(); 55 56 FramelessScrollViewClient* client() const { return m_client; } 57 void setClient(FramelessScrollViewClient* client) { m_client = client; } 58 59 // Event handlers that subclasses must implement. 60 virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0; 61 virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0; 62 virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0; 63 virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0; 64 virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0; 65 virtual bool handleTouchEvent(const PlatformTouchEvent&) = 0; 66 virtual bool handleGestureEvent(const PlatformGestureEvent&) = 0; 67 68 // ScrollableArea public methods: 69 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE; 70 virtual bool isActive() const OVERRIDE; 71 virtual ScrollableArea* enclosingScrollableArea() const OVERRIDE; 72 virtual bool scrollbarsCanBeActive() const OVERRIDE; 73 virtual IntRect scrollableAreaBoundingBox() const OVERRIDE; 74 75 // Widget public methods: 76 virtual void invalidateRect(const IntRect&); 77 78 // ScrollView public methods: 79 virtual HostWindow* hostWindow() const; 80 virtual IntRect windowClipRect(bool clipToContents = true) const; 81 82 protected: 83 // ScrollView protected methods: 84 virtual void paintContents(GraphicsContext*, const IntRect&); 85 virtual void contentsResized(); 86 virtual void visibleContentsResized(); 87 88 private: 89 FramelessScrollViewClient* m_client; 90 }; 91 92 } // namespace WebCore 93 94 #endif 95
