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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CCScrollbarGeometryFixedThumb_h
#define CCScrollbarGeometryFixedThumb_h
#include "CCScrollbarGeometryStub.h"
#include "IntSize.h"
namespace cc {
// This scrollbar geometry class behaves exactly like a normal geometry except
// it always returns a fixed thumb length. This allows a page to zoom (changing
// the total size of the scrollable area, changing the thumb length) while not
// requiring the thumb resource to be repainted.
class CCScrollbarGeometryFixedThumb : public CCScrollbarGeometryStub {
public:
static PassOwnPtr<CCScrollbarGeometryFixedThumb> create(PassOwnPtr<WebKit::WebScrollbarThemeGeometry>);
virtual ~CCScrollbarGeometryFixedThumb();
// Update thumb length from scrollbar
void update(WebKit::WebScrollbar*);
// WebScrollbarThemeGeometry interface
virtual WebKit::WebScrollbarThemeGeometry* clone() const OVERRIDE;
virtual int thumbLength(WebKit::WebScrollbar*) OVERRIDE;
virtual int thumbPosition(WebKit::WebScrollbar*) OVERRIDE;
virtual void splitTrack(WebKit::WebScrollbar*, const WebKit::WebRect& track, WebKit::WebRect& startTrack, WebKit::WebRect& thumb, WebKit::WebRect& endTrack) OVERRIDE;
private:
explicit CCScrollbarGeometryFixedThumb(PassOwnPtr<WebKit::WebScrollbarThemeGeometry>);
IntSize m_thumbSize;
};
}
#endif
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