DOKK / manpages / debian 10 / libqwt5-doc / QwtPlotMagnifier.3.en
QwtPlotMagnifier(3) Qwt User's Guide QwtPlotMagnifier(3)

QwtPlotMagnifier -

#include <qwt_plot_magnifier.h>

Inherits QwtMagnifier.


QwtPlotMagnifier (QwtPlotCanvas *)
virtual ~QwtPlotMagnifier ()
QwtPlotCanvas * canvas ()
const QwtPlotCanvas * canvas () const
bool isAxisEnabled (int axis) const
QwtPlot * plot ()
const QwtPlot * plot () const
void setAxisEnabled (int axis, bool on)


virtual void rescale (double factor)

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.

See also:

QwtPlotZoomer, QwtPlotPanner, QwtPlot

Constructor

Parameters:

canvas Plot canvas to be magnified

Test if an axis is enabled

Parameters:

axis Axis, see QwtPlot::Axis

Returns:

True, if the axis is enabled

See also:

setAxisEnabled()

Zoom in/out the axes scales

Parameters:

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

Implements QwtMagnifier.

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()

Generated automatically by Doxygen for Qwt User's Guide from the source code.

Tue Nov 20 2012 Version 5.2.3