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/*
* Copyright (C) 2010 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 WebScrollbar_h
#define WebScrollbar_h
#include "WebCanvas.h"
#include "WebCommon.h"
namespace WebKit {
class WebInputEvent;
class WebScrollbarClient;
struct WebRect;
class WebScrollbar {
public:
enum Orientation {
Horizontal,
Vertical
};
enum ScrollDirection {
ScrollBackward,
ScrollForward
};
enum ScrollGranularity {
ScrollByLine,
ScrollByPage,
ScrollByDocument,
ScrollByPixel
};
// Creates a WebScrollbar.
WEBKIT_API static WebScrollbar* create(WebScrollbarClient*, Orientation);
virtual ~WebScrollbar() {}
// Gets the thickness of the scrollbar in pixels.
WEBKIT_API static int defaultThickness();
// Sets the rectangle of the scrollbar.
virtual void setLocation(const WebRect&) = 0;
// Gets the current value (i.e. position inside the region).
virtual int value() const = 0;
// Sets the current value.
virtual void setValue(int position) = 0;
// Sets the size of the scrollable region in pixels. i.e. if a document is
// 800x10000 pixels and the viewport is 1000x1000 pixels, then setLocation
// for the vertical scrollbar would have passed in a rectangle like:
// (800 - defaultThickness(), 0) (defaultThickness() x 10000)
// and setDocumentSize(10000)
virtual void setDocumentSize(int size) = 0;
// Scroll back or forward with the given granularity.
virtual void scroll(ScrollDirection, ScrollGranularity, float multiplier) = 0;
// Paint the given rectangle.
virtual void paint(WebCanvas*, const WebRect&) = 0;
// Returns true iff the given event was used.
virtual bool handleInputEvent(const WebInputEvent&) = 0;
};
} // namespace WebKit
#endif
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