Qwt Polar User's Guide  0.1.0
Public Member Functions | Protected Slots | Protected Member Functions | List of all members
QwtPolarPanner Class Reference

#include <qwt_polar_panner.h>

Public Member Functions

 QwtPolarPanner (QwtPolarCanvas *)
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
QwtPolarMagnifier

Constructor & Destructor Documentation

QwtPolarPanner::QwtPolarPanner ( QwtPolarCanvas canvas)
explicit

Create a plot panner for a polar plot canvas.

QwtPolarPanner::~QwtPolarPanner ( )
virtual

Destructor.

Member Function Documentation

QwtPolarCanvas * QwtPolarPanner::canvas ( )

Return observed plot canvas.

const QwtPolarCanvas * QwtPolarPanner::canvas ( ) const

Return observed plot canvas.

void QwtPolarPanner::movePlot ( int  dx,
int  dy 
)
protectedvirtualslot

Adjust the zoomed area according to dx/dy

Parameters
dxPixel offset in x direction
dyPixel offset in y direction
See Also
QwtPanner::panned(), QwtPolarPlot::zoom()
QwtPolarPlot * QwtPolarPanner::plot ( )

Return observed plot.

const QwtPolarPlot * QwtPolarPanner::plot ( ) const

Return observed plot.

void QwtPolarPanner::widgetMousePressEvent ( QMouseEvent *  me)
protectedvirtual

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

Parameters
meMouse event