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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_CANVAS_H
#define QWT_PLOT_CANVAS_H
#include <qframe.h>
#include <qpen.h>
#include "qwt_global.h"
#include "qwt.h"
class QwtPlot;
class QPixmap;
/*!
\brief Canvas of a QwtPlot.
\sa QwtPlot
*/
class QWT_EXPORT QwtPlotCanvas : public QFrame
{
Q_OBJECT
friend class QwtPlot;
public:
/*!
\brief Focus indicator
- NoFocusIndicator\n
Dont paint a focus indicator
- CanvasFocusIndicator\n
The focus is related to the complete canvas.
Paint the focus indicator using paintFocus()
- ItemFocusIndicator\n
The focus is related to an item (curve, point, ...) on
the canvas. It is up to the application to display a
focus indication using f.e. highlighting.
\sa setFocusIndicator(), focusIndicator(), paintFocus()
*/
enum FocusIndicator
{
NoFocusIndicator,
CanvasFocusIndicator,
ItemFocusIndicator
};
void setFocusIndicator(FocusIndicator);
FocusIndicator focusIndicator() const;
void setCacheMode(bool on);
bool cacheMode() const;
const QPixmap *cache() const;
void invalidateCache();
protected:
QwtPlotCanvas(QwtPlot *);
virtual ~QwtPlotCanvas();
QPixmap *cache();
virtual void frameChanged();
virtual void drawContents(QPainter *);
virtual void drawFocusIndicator(QPainter *, const QRect &);
void drawCanvas(QPainter *painter = NULL);
private:
FocusIndicator d_focusIndicator;
bool d_cacheMode;
QPixmap *d_cache;
#ifndef QWT_NO_COMPAT
public:
void enableOutline(bool tf);
bool outlineEnabled() const;
void setOutlinePen(const QPen &p);
const QPen& outlinePen() const;
void setOutlineStyle(Qwt::Shape os);
Qwt::Shape outlineStyle() const;
signals:
/*!
A signal which is emitted when the mouse is pressed in the canvas.
\warning Outlining functionality is obsolete: use QwtPlotPicker or
QwtPlotZoomer.
\param e Mouse event object
*/
void mousePressed(const QMouseEvent &e);
/*!
A signal which is emitted when a mouse button has been released in the
canvas.
\warning Outlining functionality is obsolete: use QwtPlotPicker or
QwtPlotZoomer.
\param e Mouse event object
*/
void mouseReleased(const QMouseEvent &e);
/*!
A signal which is emitted when the mouse is moved in the canvas.
\warning Outlining functionality is obsolete: use QwtPlotPicker or
QwtPlotZoomer.
\param e Mouse event object
*/
void mouseMoved(const QMouseEvent &e);
protected:
virtual void mousePressEvent(QMouseEvent *);
virtual void mouseReleaseEvent(QMouseEvent *);
virtual void mouseMoveEvent(QMouseEvent *);
private:
bool d_outlineEnabled;
bool d_outlineActive;
bool d_mousePressed;
void drawOutline(QPainter &p);
Qwt::Shape d_outline;
QPen d_pen;
QPoint d_entryPoint;
QPoint d_lastPoint;
#else
private:
// needed because of mocs #ifdef ignorance
void mousePressed(const QMouseEvent &);
void mouseReleased(const QMouseEvent &);
void mouseMoved(const QMouseEvent &);
#endif // !QWT_NO_COMPAT
};
#endif
// Local Variables:
// mode: C++
// c-file-style: "stroustrup"
// indent-tabs-mode: nil
// End:
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