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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
*****************************************************************************/
// vim: expandtab
#ifndef QWT_PLOT_PICKER
#define QWT_PLOT_PICKER
#include "qwt_double_rect.h"
#include "qwt_array.h"
#include "qwt_plot_canvas.h"
#include "qwt_picker.h"
class QwtPlot;
/*!
\brief QwtPlotPicker provides selections on a plot canvas
QwtPlotPicker is a QwtPicker tailored for selections on
a plot canvas. It is set to a x-Axis and y-Axis and
translates all pixel coordinates into this coodinate system.
\warning Calling QwtPlot::setAxisScale() while QwtPlot::autoReplot() is FALSE
leaves the axis in an 'intermediate' state.
In this case, to prevent buggy behaviour, your must call
QwtPlot::replot() before calling QwtPlotPicker::scaleRect(),
QwtPlotZoomer::scaleRect(), QwtPlotPicker::QwtPlotPicker() or
QwtPlotZoomer::QwtPlotZoomer().
This quirk will be removed in a future release.
*/
class QWT_EXPORT QwtPlotPicker: public QwtPicker
{
Q_OBJECT
public:
QwtPlotPicker(QwtPlotCanvas *, const char *name = 0);
QwtPlotPicker(int xAxis, int yAxis,
QwtPlotCanvas *, const char *name = 0);
QwtPlotPicker(int xAxis, int yAxis, int selectionFlags,
RubberBand rubberBand, DisplayMode cursorLabelMode,
QwtPlotCanvas *, const char *name = 0);
virtual void setAxis(int xAxis, int yAxis);
int xAxis() const;
int yAxis() const;
QwtPlot *plot();
const QwtPlot *plot() const;
QwtPlotCanvas *canvas();
const QwtPlotCanvas *canvas() const;
signals:
/*!
A signal emitted in case of selectionFlags() & PointSelection.
\param pos Selected point
*/
void selected(const QwtDoublePoint &pos);
/*!
A signal emitted in case of selectionFlags() & RectSelection.
\param rect Selected rectangle
*/
void selected(const QwtDoubleRect &rect);
/*!
A signal emitting the selected points,
at the end of a selection.
\param pa Selected points
*/
void selected(const QwtArray<QwtDoublePoint> &pa);
/*!
A signal emitted when a point has been appended to the selection
\param pos Position of the appended point.
\sa append(). moved()
*/
void appended(const QwtDoublePoint &pos);
/*!
A signal emitted whenever the last appended point of the
selection has been moved.
\param pos Position of the moved last point of the selection.
\sa move(), appended()
*/
void moved(const QwtDoublePoint &pos);
protected:
QwtDoubleRect scaleRect() const;
QwtDoubleRect invTransform(const QRect &) const;
QRect transform(const QwtDoubleRect &) const;
QwtDoublePoint invTransform(const QPoint &) const;
QPoint transform(const QwtDoublePoint &) const;
virtual QString cursorLabel(const QPoint &) const;
virtual QString cursorLabel(const QwtDoublePoint &) const;
virtual void move(const QPoint &);
virtual void append(const QPoint &);
virtual bool end(bool ok = TRUE);
private:
int d_xAxis;
int d_yAxis;
};
#endif
// Local Variables:
// mode: C++
// c-file-style: "stroustrup"
// indent-tabs-mode: nil
// End:
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