1 /* 2 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef RenderSlider_h 22 #define RenderSlider_h 23 24 #include "RenderBlock.h" 25 26 namespace WebCore { 27 28 class HTMLInputElement; 29 class MouseEvent; 30 class SliderThumbElement; 31 32 class RenderSlider : public RenderBlock { 33 public: 34 RenderSlider(HTMLInputElement*); 35 virtual ~RenderSlider(); 36 37 void forwardEvent(Event*); 38 bool inDragMode() const; 39 IntRect thumbRect(); 40 41 private: 42 virtual const char* renderName() const { return "RenderSlider"; } 43 virtual bool isSlider() const { return true; } 44 45 virtual int baselinePosition(bool, bool) const; 46 virtual void calcPrefWidths(); 47 virtual void layout(); 48 virtual void updateFromElement(); 49 50 bool mouseEventIsInThumb(MouseEvent*); 51 FloatPoint mouseEventOffsetToThumb(MouseEvent*); 52 53 void setValueForPosition(int position); 54 void setPositionFromValue(); 55 int positionForOffset(const IntPoint&); 56 57 int currentPosition(); 58 59 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 60 61 PassRefPtr<RenderStyle> createThumbStyle(const RenderStyle* parentStyle); 62 63 int trackSize(); 64 65 RefPtr<SliderThumbElement> m_thumb; 66 67 friend class SliderThumbElement; 68 }; 69 70 inline RenderSlider* toRenderSlider(RenderObject* object) 71 { 72 ASSERT(!object || object->isSlider()); 73 return static_cast<RenderSlider*>(object); 74 } 75 76 // This will catch anyone doing an unnecessary cast. 77 void toRenderSlider(const RenderSlider*); 78 79 } // namespace WebCore 80 81 #endif // RenderSlider_h 82