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QwtPlotMagnifier(3) Qwt User's Guide QwtPlotMagnifier(3)

NAME

QwtPlotMagnifier - QwtPlotMagnifier provides zooming, by magnifying in steps.

SYNOPSIS

#include <qwt_plot_magnifier.h>

Inherits QwtMagnifier.

Public Slots


virtual void rescale (double factor) override

Public Member Functions


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

Additional Inherited Members

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

Definition at line 30 of file qwt_plot_magnifier.h.

Constructor & Destructor Documentation

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

Constructor

Parameters

canvas Plot canvas to be magnified

Definition at line 30 of file qwt_plot_magnifier.cpp.

Member Function Documentation

bool QwtPlotMagnifier::isAxisEnabled (QwtAxisId axisId) const

Test if an axis is enabled

Parameters

axisId Axis

Returns

True, if the axis is enabled

See also

setAxisEnabled()

Definition at line 67 of file qwt_plot_magnifier.cpp.

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

Zoom in/out the axes scales

Parameters

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

Definition at line 111 of file qwt_plot_magnifier.cpp.

void QwtPlotMagnifier::setAxisEnabled (QwtAxisId axisId, bool on)

En/Disable an axis. Only Axes that are enabled will be zoomed. All other axes will remain unchanged.

Parameters

axisId Axis
on On/Off

See also

isAxisEnabled()

Definition at line 53 of file qwt_plot_magnifier.cpp.

Author

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Sun Jul 18 2021 Version 6.2.0