/*

 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#ifndef RenderSlider_h

#define RenderSlider_h

#include "RenderBlock.h"

namespace WebCore {

    class HTMLInputElement;

    class MouseEvent;

    class SliderThumbElement;

    class RenderSlider : public RenderBlock {

    public:

        RenderSlider(HTMLInputElement*);

        virtual ~RenderSlider();

        void forwardEvent(Event*);

        bool inDragMode() const;

        IntRect thumbRect();

    private:

        virtual const char* renderName() const { return "RenderSlider"; }

        virtual bool isSlider() const { return true; }

        virtual int baselinePosition(bool, bool) const;

        virtual void calcPrefWidths();

        virtual void layout();

        virtual void updateFromElement();

        bool mouseEventIsInThumb(MouseEvent*);

        FloatPoint mouseEventOffsetToThumb(MouseEvent*);

        void setValueForPosition(int position);

        void setPositionFromValue();

        int positionForOffset(const IntPoint&);

        int currentPosition();

        virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);

        virtual bool requiresForcedStyleRecalcPropagation() const { return true; }

        PassRefPtr<RenderStyle> createThumbStyle(const RenderStyle* parentStyle);

        int trackSize();

        RefPtr<SliderThumbElement> m_thumb;

        friend class SliderThumbElement;

    };

    inline RenderSlider* toRenderSlider(RenderObject* object)

    {

        ASSERT(!object || object->isSlider());

        return static_cast<RenderSlider*>(object);

    }

    // This will catch anyone doing an unnecessary cast.

    void toRenderSlider(const RenderSlider*);

} // namespace WebCore

#endif // RenderSlider_h