QwtPlotMagnifier - Man Page

QwtPlotMagnifier provides zooming, by magnifying in steps.

Synopsis

#include <qwt_plot_magnifier.h>

Inherits QwtMagnifier.

Public Member Functions

QwtPlotMagnifier (QWidget *)
virtual ~QwtPlotMagnifier ()
Destructor.
void setAxisEnabled (int axis, bool on)
En/Disable an axis.
bool isAxisEnabled (int axis) const
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.

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.

See also

QwtPlotZoomer, QwtPlotPanner, QwtPlot

Constructor & Destructor Documentation

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

Constructor

Parameters

canvas Plot canvas to be magnified

Member Function Documentation

bool QwtPlotMagnifier::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()

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.

Implements QwtMagnifier.

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

See also

isAxisEnabled()

Author

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Info

Mon Jun 1 2020 Version 6.1.5 Qwt User's Guide