QwtPlotMagnifier provides zooming, by magnifying in steps. More...

Inheritance diagram for QwtPlotMagnifier:

Public Member Functions
	QwtPlotMagnifier (QwtPlotCanvas *)
virtual	~QwtPlotMagnifier ()
void	setAxisEnabled (int axis, bool on)
bool	isAxisEnabled (int axis) const
QwtPlotCanvas *	canvas ()
const QwtPlotCanvas *	canvas () const
QwtPlot *	plot ()
const QwtPlot *	plot () const
Protected Member Functions
virtual void	rescale (double factor)

Detailed Description

QwtPlotMagnifier provides zooming, by magnifying in steps.

Using QwtPlotMagnifier a plot can be zoomed in/out in steps using keys, the mouse wheel or moving a mouse button in vertical direction.

Together with QwtPlotZoomer and QwtPlotPanner it is possible to implement individual and powerful navigation of the plot canvas.

Constructor & Destructor Documentation

QwtPlotMagnifier::QwtPlotMagnifier ( QwtPlotCanvas * canvas ) [explicit]

Constructor

Parameters:

canvas Plot canvas to be magnified

QwtPlotMagnifier::~QwtPlotMagnifier ( ) [virtual]

Destructor.

QwtPlotCanvas * QwtPlotMagnifier::canvas ( )

Return observed plot canvas.

const QwtPlotCanvas * QwtPlotMagnifier::canvas ( ) const

Return Observed plot canvas.

bool QwtPlotMagnifier::isAxisEnabled ( int axis ) const

Test if an axis is enabled

Parameters:

axis	Axis, see QwtPlot::Axis

QwtPlot * QwtPlotMagnifier::plot ( )

Return plot widget, containing the observed plot canvas.

const QwtPlot * QwtPlotMagnifier::plot ( ) const

Return plot widget, containing the observed plot canvas.

void QwtPlotMagnifier::rescale ( double factor ) [protected, virtual]

Zoom in/out the axes scales

Parameters:

factor A value < 1.0 zooms in, a value > 1.0 zooms out.

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

En/Disable an axis.

Only Axes that are enabled will be zoomed. All other axes will remain unchanged.

Parameters:

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