Qwt Polar User's Guide  1.1.1
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QwtPolarPanner Class Reference

QwtPolarPanner provides panning of a polar plot canvas. More...

#include <qwt_polar_panner.h>

Inheritance diagram for QwtPolarPanner:
Inheritance graph

Public Member Functions

 QwtPolarPanner (QwtPolarCanvas *)
 Create a plot panner for a polar plot canvas.
virtual ~QwtPolarPanner ()
QwtPolarPlotplot ()
const QwtPolarPlotplot () const
QwtPolarCanvascanvas ()
const QwtPolarCanvascanvas () const

Protected Slots

virtual void movePlot (int dx, int dy)

Protected Member Functions

virtual void widgetMousePressEvent (QMouseEvent *)

Detailed Description

QwtPolarPanner provides panning of a polar plot canvas.

QwtPolarPanner is a panner for a QwtPolarCanvas, that adjusts the visible area after dropping the canvas on its new position.

Together with QwtPolarMagnifier individual ways of navigating on a QwtPolarPlot widget can be implemented easily.

See Also

Member Function Documentation

QwtPolarCanvas * QwtPolarPanner::canvas ( )
observed plot canvas
const QwtPolarCanvas * QwtPolarPanner::canvas ( ) const
observed plot canvas
void QwtPolarPanner::movePlot ( int  dx,
int  dy 

Adjust the zoomed area according to dx/dy

dxPixel offset in x direction
dyPixel offset in y direction
See Also
QwtPanner::panned(), QwtPolarPlot::zoom()
QwtPolarPlot * QwtPolarPanner::plot ( )
observed plot
const QwtPolarPlot * QwtPolarPanner::plot ( ) const
observed plot
void QwtPolarPanner::widgetMousePressEvent ( QMouseEvent *  event)

Block panning when the plot zoom factor is >= 1.0.

eventMouse event