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QwtPlotMagnifier

NAME

QwtPlotMagnifier -

SYNOPSIS

Inherits QwtMagnifier.

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.

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)

Constructor & Destructor Documentation

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

Constructor

Parameters:

canvas Plot canvas to be magnified

Definition at line 35 of file qwt_plot_magnifier.cpp.

QwtPlotMagnifier::~QwtPlotMagnifier () [virtual]

Destructor.

Definition at line 42 of file qwt_plot_magnifier.cpp.

Member Function Documentation

void QwtPlotMagnifier::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

Definition at line 58 of file qwt_plot_magnifier.cpp.

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

Definition at line 72 of file qwt_plot_magnifier.cpp.

Referenced by rescale().

QwtPlotCanvas * QwtPlotMagnifier::canvas ()

Return observed plot canvas.

Definition at line 81 of file qwt_plot_magnifier.cpp.

Referenced by plot().

const QwtPlotCanvas * QwtPlotMagnifier::canvas () const

Return Observed plot canvas.

Definition at line 91 of file qwt_plot_magnifier.cpp.

QwtPlot * QwtPlotMagnifier::plot ()

Return plot widget, containing the observed plot canvas.

Definition at line 97 of file qwt_plot_magnifier.cpp.

References canvas().

Referenced by rescale().

const QwtPlot * QwtPlotMagnifier::plot () const

Return plot widget, containing the observed plot canvas.

Definition at line 111 of file qwt_plot_magnifier.cpp.

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.

Definition at line 120 of file qwt_plot_magnifier.cpp.

References QwtPlot::autoReplot(), QwtPlot::axisScaleDiv(), isAxisEnabled(), QwtScaleDiv::lBound(), plot(), QwtPlot::replot(), QwtPlot::setAutoReplot(), and QwtPlot::setAxisScale().

Author

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