QwtPlotPanner Class Reference

QwtPlotPanner provides panning of a plot canvas. More...

#include <qwt_plot_panner.h>

Inheritance diagram for QwtPlotPanner:

Public Member Functions
	QwtPlotPanner (QWidget *)
	A panner for the canvas of a QwtPlot.
virtual	~QwtPlotPanner ()
	Destructor.
QWidget *	canvas ()
	Return observed plot canvas.
const QWidget *	canvas () const
	Return Observed plot canvas.
QwtPlot *	plot ()
	Return plot widget, containing the observed plot canvas.
const QwtPlot *	plot () const
	Return plot widget, containing the observed plot canvas.
void	setAxisEnabled (int axis, bool on)
	En/Disable an axis.
bool	isAxisEnabled (int axis) const
Protected Slots
virtual void	moveCanvas (int dx, int dy)
Protected Member Functions
virtual QBitmap	contentsMask () const
virtual QPixmap	grab () const

---

Detailed Description

QwtPlotPanner provides panning of a plot canvas.

QwtPlotPanner is a panner for a plot canvas, that adjusts the scales of the axes after dropping the canvas on its new position.

Together with QwtPlotZoomer and QwtPlotMagnifier powerful ways of navigating on a QwtPlot widget can be implemented easily.

Note:

The axes are not updated, while dragging the canvas

See also:

QwtPlotZoomer, QwtPlotMagnifier

---

Constructor & Destructor Documentation

QwtPlotPanner::QwtPlotPanner

(

QWidget *

canvas

)

[explicit]

A panner for the canvas of a QwtPlot.

The panner is enabled for all axes

Parameters:

canvas

Plot canvas to pan, also the parent object

See also:

setAxisEnabled()

---

Member Function Documentation

QBitmap QwtPlotPanner::contentsMask

(

)

const [protected, virtual]

Calculate a mask from the border path of the canvas

Returns:

Mask as bitmap

See also:

QwtPlotCanvas::borderPath()

Reimplemented from QwtPanner.

QPixmap QwtPlotPanner::grab

(

)

const [protected, virtual]

Returns:

Pixmap with the content of the canvas

Reimplemented from QwtPanner.

bool QwtPlotPanner::isAxisEnabled

(

int

axis

)

const

Test if an axis is enabled

Parameters:

axis	Axis, see QwtPlot::Axis

Returns:

True, if the axis is enabled

See also:

setAxisEnabled(), moveCanvas()

void QwtPlotPanner::moveCanvas	(	int	dx,
		int	dy
	)		[protected, virtual, slot]

Adjust the enabled axes according to dx/dy

Parameters:

dx	Pixel offset in x direction
dy	Pixel offset in y direction

See also:

QwtPanner::panned()

void QwtPlotPanner::setAxisEnabled	(	int	axis,
		bool	on
	)

En/Disable an axis.

Axes that are enabled will be synchronized to the result of panning. All other axes will remain unchanged.

Parameters:

axis	Axis, see QwtPlot::Axis
on	On/Off

See also:

isAxisEnabled(), moveCanvas()

List of all members.