Home | History | Annotate | Download | only in rendering 
      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