1 /*

     2  * Copyright (C) 2010 Google Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions are

     6  * met:

     7  *

     8  *     * Redistributions of source code must retain the above copyright

     9  * notice, this list of conditions and the following disclaimer.

    10  *     * Redistributions in binary form must reproduce the above

    11  * copyright notice, this list of conditions and the following disclaimer

    12  * in the documentation and/or other materials provided with the

    13  * distribution.

    14  *     * Neither the name of Google Inc. nor the names of its

    15  * contributors may be used to endorse or promote products derived from

    16  * this software without specific prior written permission.

    17  *

    18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

    22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29  */

    30 

    31 #ifndef WebScrollbarImpl_h

    32 #define WebScrollbarImpl_h

    33 

    34 #include "ScrollbarClient.h"

    35 #include "WebScrollbar.h"

    36 

    37 #include <wtf/RefPtr.h>

    38 

    39 namespace WebCore {

    40 class Scrollbar;

    41 }

    42 

    43 namespace WebKit {

    44 

    45 class WebScrollbarImpl : public WebScrollbar,

    46                          public WebCore::ScrollbarClient {

    47 public:

    48     WebScrollbarImpl(WebScrollbarClient*, Orientation orientation);

    49     ~WebScrollbarImpl();

    50 

    51     // WebKit::WebScrollbar methods

    52     virtual void setLocation(const WebRect&);

    53     virtual int value() const;

    54     virtual void setValue(int position);

    55     virtual void setDocumentSize(int size);

    56     virtual void scroll(ScrollDirection, ScrollGranularity, float multiplier);

    57     virtual void paint(WebCanvas*, const WebRect&);

    58     virtual bool handleInputEvent(const WebInputEvent&);

    59 

    60     // WebCore::ScrollbarClient methods

    61     virtual void valueChanged(WebCore::Scrollbar*);

    62     virtual void invalidateScrollbarRect(WebCore::Scrollbar*, const WebCore::IntRect&);

    63     virtual bool isActive() const;

    64     virtual bool scrollbarCornerPresent() const;

    65     virtual void getTickmarks(Vector<WebCore::IntRect>&) const;

    66 

    67 private:

    68     bool onMouseDown(const WebInputEvent& event);

    69     bool onMouseUp(const WebInputEvent& event);

    70     bool onMouseMove(const WebInputEvent& event);

    71     bool onMouseLeave(const WebInputEvent& event);

    72     bool onMouseWheel(const WebInputEvent& event);

    73     bool onKeyDown(const WebInputEvent& event);

    74 

    75     WebScrollbarClient* m_client;

    76 

    77     RefPtr<WebCore::Scrollbar> m_scrollbar;

    78 };

    79 

    80 } // namespace WebKit

    81 

    82 #endif