1 /* 2 * Copyright (C) 2008 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef ScrollbarClient_h 27 #define ScrollbarClient_h 28 29 #include "IntRect.h" 30 #include "Scrollbar.h" 31 #include <wtf/Vector.h> 32 33 namespace WebCore { 34 35 class ScrollbarClient { 36 public: ~ScrollbarClient()37 virtual ~ScrollbarClient() {} 38 virtual void valueChanged(Scrollbar*) = 0; 39 40 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) = 0; 41 42 virtual bool isActive() const = 0; 43 44 virtual bool scrollbarCornerPresent() const = 0; 45 getTickmarks(Vector<IntRect> &)46 virtual void getTickmarks(Vector<IntRect>&) const { } 47 48 // Convert points and rects between the scrollbar and its containing view. 49 // The client needs to implement these in order to be aware of layout effects 50 // like CSS transforms. convertFromScrollbarToContainingView(const Scrollbar * scrollbar,const IntRect & scrollbarRect)51 virtual IntRect convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntRect& scrollbarRect) const 52 { 53 return scrollbar->Widget::convertToContainingView(scrollbarRect); 54 } 55 convertFromContainingViewToScrollbar(const Scrollbar * scrollbar,const IntRect & parentRect)56 virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntRect& parentRect) const 57 { 58 return scrollbar->Widget::convertFromContainingView(parentRect); 59 } 60 convertFromScrollbarToContainingView(const Scrollbar * scrollbar,const IntPoint & scrollbarPoint)61 virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntPoint& scrollbarPoint) const 62 { 63 return scrollbar->Widget::convertToContainingView(scrollbarPoint); 64 } 65 convertFromContainingViewToScrollbar(const Scrollbar * scrollbar,const IntPoint & parentPoint)66 virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntPoint& parentPoint) const 67 { 68 return scrollbar->Widget::convertFromContainingView(parentPoint); 69 } 70 }; 71 72 } 73 #endif 74