WebCore/accessibility/AccessibilitySlider.h

/*
 * Copyright (C) 2009 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef AccessibilitySlider_h
#define AccessibilitySlider_h

#include "AccessibilityRenderObject.h"

namespace WebCore {

    class HTMLInputElement;

    class AccessibilitySlider : public AccessibilityRenderObject {
        
    public:
        static PassRefPtr<AccessibilitySlider> create(RenderObject*);
        virtual ~AccessibilitySlider() { }

        virtual AccessibilityRole roleValue() const { return SliderRole; }
        virtual bool accessibilityIsIgnored() const { return false; }

        virtual bool isSlider() const { return true; }

        virtual const AccessibilityChildrenVector& children();
        virtual void addChildren();

        virtual bool canSetValueAttribute() const { return true; };
        const AtomicString& getAttribute(const QualifiedName& attribute) const;

        virtual void setValue(const String&);
        virtual float valueForRange() const;
        virtual float maxValueForRange() const;
        virtual float minValueForRange() const;
        virtual AccessibilityOrientation orientation() const;

        virtual void increment();
        virtual void decrement();

    private:
        AccessibilitySlider(RenderObject*);
        void changeValue(float /*percentChange*/);
        HTMLInputElement* element() const;
    };

    class AccessibilitySliderThumb : public AccessibilityObject {
        
    public:
        static PassRefPtr<AccessibilitySliderThumb> create();
        virtual ~AccessibilitySliderThumb() { }

        virtual AccessibilityRole roleValue() const { return SliderThumbRole; }
        virtual bool accessibilityIsIgnored() const { return false; }

        void setParentObject(AccessibilitySlider* slider) { m_parentSlider = slider; }
        virtual AccessibilityObject* parentObject() const { return m_parentSlider; }

        virtual IntSize size() const;
        virtual IntRect elementRect() const;

    private:
        AccessibilitySliderThumb();

        AccessibilitySlider* m_parentSlider;
    };


} // namespace WebCore

#endif // AccessibilitySlider_h