* Copyright 2001-2009, Ingo Weinhold <ingo_weinhold@gmx.de>
* All rights reserved. Distributed under the terms of the MIT license.
*/
#ifndef SCROLLABLE_H
#define SCROLLABLE_H
#include <Point.h>
#include <Rect.h>
class Scroller;
class Scrollable {
public:
Scrollable();
virtual ~Scrollable();
void SetScrollSource(Scroller* source);
Scroller* ScrollSource() const;
void SetDataRect(BRect dataRect,
bool validateScrollOffset = true);
BRect DataRect() const;
virtual void SetScrollOffset(BPoint offset);
BPoint ScrollOffset() const;
void SetDataRectAndScrollOffset(BRect dataRect,
BPoint offset);
BPoint ValidScrollOffsetFor(BPoint offset) const;
BPoint ValidScrollOffsetFor(BPoint offset,
const BRect& dataRect) const;
void SetVisibleSize(float width, float height);
BRect VisibleBounds() const;
BRect VisibleRect() const;
protected:
virtual void DataRectChanged(BRect oldDataRect,
BRect newDataRect);
virtual void ScrollOffsetChanged(BPoint oldOffset,
BPoint newOffset);
virtual void VisibleSizeChanged(float oldWidth,
float oldHeight,
float newWidth,
float newHeight);
virtual void ScrollSourceChanged(Scroller* oldSource,
Scroller* newSource);
private:
BRect fDataRect;
BPoint fScrollOffset;
float fVisibleWidth;
float fVisibleHeight;
Scroller* fScrollSource;
};
#endif
