* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
* Distributed under the terms of the MIT License.
*/
#ifndef CHART_H
#define CHART_H
#include <View.h>
#include <ObjectList.h>
#include "chart/ChartDataRange.h"
#include "chart/ChartDefs.h"
class ChartAxis;
class ChartDataSource;
class ChartRenderer;
class ChartRendererDataSourceConfig;
class Chart : public BView {
public:
Chart(ChartRenderer* renderer,
const char* name = NULL);
virtual ~Chart();
bool AddDataSource(ChartDataSource* dataSource,
int32 index,
ChartRendererDataSourceConfig* config
= NULL);
bool AddDataSource(ChartDataSource* dataSource,
ChartRendererDataSourceConfig* config
= NULL);
bool RemoveDataSource(
ChartDataSource* dataSource);
ChartDataSource* RemoveDataSource(int32 index);
void RemoveAllDataSources();
void SetAxis(ChartAxisLocation location,
ChartAxis* axis);
inline ChartDataRange Domain() const;
inline ChartDataRange Range() const;
inline ChartDataRange DisplayDomain() const;
inline ChartDataRange DisplayRange() const;
void SetDisplayDomain(ChartDataRange domain);
void SetDisplayRange(ChartDataRange range);
double DomainZoomLimit() const;
void SetDomainZoomLimit(double limit);
virtual void DomainChanged();
virtual void RangeChanged();
virtual void MessageReceived(BMessage* message);
virtual void MouseDown(BPoint where);
virtual void MouseUp(BPoint where);
virtual void MouseMoved(BPoint where, uint32 code,
const BMessage* dragMessage);
virtual void FrameResized(float newWidth, float newHeight);
virtual void Draw(BRect updateRect);
virtual void ScrollTo(BPoint where);
virtual BSize MinSize();
virtual BSize MaxSize();
virtual BSize PreferredSize();
virtual void DoLayout();
private:
typedef BObjectList<ChartDataSource> DataSourceList;
struct AxisInfo {
ChartAxis* axis;
BRect frame;
AxisInfo();
void SetFrame(float left, float top, float right,
float bottom);
void SetRange(const ChartDataRange& range);
void Render(BView* view, const BRect& updateRect);
};
private:
void _UpdateDomainAndRange();
void _UpdateScrollBar(bool horizontal);
void _ScrollTo(float value, bool horizontal);
void _Zoom(float x, float steps);
private:
ChartRenderer* fRenderer;
DataSourceList fDataSources;
AxisInfo fLeftAxis;
AxisInfo fTopAxis;
AxisInfo fRightAxis;
AxisInfo fBottomAxis;
ChartDataRange fDomain;
ChartDataRange fRange;
ChartDataRange fDisplayDomain;
ChartDataRange fDisplayRange;
BRect fChartFrame;
float fHScrollSize;
float fVScrollSize;
float fHScrollValue;
float fVScrollValue;
int32 fIgnoreScrollEvent;
double fDomainZoomLimit;
BPoint fLastMousePos;
BPoint fDraggingStartPos;
float fDraggingStartScrollValue;
};
ChartDataRange
Chart::Domain() const
{
return fDomain;
}
ChartDataRange
Chart::Range() const
{
return fRange;
}
ChartDataRange
Chart::DisplayDomain() const
{
return fDisplayDomain;
}
ChartDataRange
Chart::DisplayRange() const
{
return fDisplayRange;
}
#endif
