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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#ifndef QWT_PLOT_ITEM_H
#define QWT_PLOT_ITEM_H
#include "qwt_global.h"
#include "qwt_legend_itemmanager.h"
#include "qwt_text.h"
#include "qwt_double_rect.h"
class QString;
class QRect;
class QPainter;
class QWidget;
class QwtPlot;
class QwtLegend;
class QwtScaleMap;
class QwtScaleDiv;
/*!
\brief Base class for items on the plot canvas
*/
class QWT_EXPORT QwtPlotItem: public QwtLegendItemManager
{
public:
enum RttiValues {
Rtti_PlotItem = 0,
Rtti_PlotGrid,
Rtti_PlotScale,
Rtti_PlotMarker,
Rtti_PlotCurve,
Rtti_PlotHistogram,
Rtti_PlotSpectrogram,
Rtti_PlotSVG,
Rtti_PlotUserItem = 1000
};
enum ItemAttribute {
Legend = 1,
AutoScale = 2
};
#if QT_VERSION >= 0x040000
enum RenderHint {
RenderAntialiased = 1
};
#endif
explicit QwtPlotItem(const QwtText &title = QwtText());
virtual ~QwtPlotItem();
void attach(QwtPlot *plot);
/*!
\brief This method detaches a QwtPlotItem from any QwtPlot it has been
associated with.
detach() is equivalent to calling attach( NULL )
\sa attach( QwtPlot* plot )
*/
void detach() {
attach(NULL);
}
QwtPlot *plot() const;
void setTitle(const QString &title);
void setTitle(const QwtText &title);
const QwtText &title() const;
virtual int rtti() const;
void setItemAttribute(ItemAttribute, bool on = true);
bool testItemAttribute(ItemAttribute) const;
#if QT_VERSION >= 0x040000
void setRenderHint(RenderHint, bool on = true);
bool testRenderHint(RenderHint) const;
#endif
double z() const;
void setZ(double z);
void show();
void hide();
virtual void setVisible(bool);
bool isVisible () const;
void setAxis(int xAxis, int yAxis);
void setXAxis(int axis);
int xAxis() const;
void setYAxis(int axis);
int yAxis() const;
virtual void itemChanged();
/*!
\brief Draw the item
\param painter Painter
\param xMap Maps x-values into pixel coordinates.
\param yMap Maps y-values into pixel coordinates.
\param canvasRect Contents rect of the canvas in painter coordinates
*/
virtual void draw(QPainter *painter,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRect &canvasRect) const = 0;
virtual QwtDoubleRect boundingRect() const;
virtual void updateLegend(QwtLegend *) const;
virtual void updateScaleDiv(const QwtScaleDiv&,
const QwtScaleDiv&);
virtual QWidget *legendItem() const;
QwtDoubleRect scaleRect(const QwtScaleMap &, const QwtScaleMap &) const;
QRect paintRect(const QwtScaleMap &, const QwtScaleMap &) const;
QRect transform(const QwtScaleMap &, const QwtScaleMap &,
const QwtDoubleRect&) const;
QwtDoubleRect invTransform(const QwtScaleMap &, const QwtScaleMap &,
const QRect&) const;
private:
// Disabled copy constructor and operator=
QwtPlotItem( const QwtPlotItem & );
QwtPlotItem &operator=( const QwtPlotItem & );
class PrivateData;
PrivateData *d_data;
};
#endif