QwtPlotMagnifier Class Reference

Inheritance diagram for QwtPlotMagnifier:

[legend]Collaboration diagram for QwtPlotMagnifier:

[legend]List of all members.

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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)

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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.

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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().

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