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      1 /*
      2  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef SliderThumbElement_h
     33 #define SliderThumbElement_h
     34 
     35 #include "FloatPoint.h"
     36 #include "HTMLDivElement.h"
     37 #include "HTMLNames.h"
     38 #include "RenderStyleConstants.h"
     39 #include <wtf/Forward.h>
     40 
     41 namespace WebCore {
     42 
     43 class HTMLElement;
     44 class HTMLInputElement;
     45 class Event;
     46 class FloatPoint;
     47 
     48 class SliderThumbElement : public HTMLDivElement {
     49 public:
     50     static PassRefPtr<SliderThumbElement> create(Document*);
     51 
     52     bool inDragMode() const { return m_inDragMode; }
     53     void setPositionFromValue();
     54 
     55     void dragFrom(const IntPoint&);
     56     virtual void defaultEventHandler(Event*);
     57     virtual void detach();
     58     virtual const AtomicString& shadowPseudoId() const;
     59 
     60 private:
     61     SliderThumbElement(Document*);
     62     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
     63     void startDragging();
     64     void stopDragging();
     65     void setPositionFromPoint(const IntPoint&);
     66     HTMLInputElement* hostInput();
     67 
     68     FloatPoint m_offsetToThumb;
     69     bool m_inDragMode;
     70 };
     71 
     72 inline SliderThumbElement::SliderThumbElement(Document* document)
     73     : HTMLDivElement(HTMLNames::divTag, document)
     74     , m_inDragMode(false)
     75 {
     76 }
     77 
     78 inline PassRefPtr<SliderThumbElement> SliderThumbElement::create(Document* document)
     79 {
     80     return adoptRef(new SliderThumbElement(document));
     81 }
     82 
     83 inline SliderThumbElement* toSliderThumbElement(Node* node)
     84 {
     85     ASSERT(!node || node->isHTMLElement());
     86     return static_cast<SliderThumbElement*>(node);
     87 }
     88 
     89 }
     90 
     91 #endif
     92