QwtPlotMagnifier Class Reference

#include <qwt_plot_magnifier.h>

Inheritance diagram for QwtPlotMagnifier:

List of all members.

Public Member Functions
	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)
Public Member Functions inherited from QwtMagnifier
	QwtMagnifier (QWidget *)
virtual	~QwtMagnifier ()
virtual bool	eventFilter (QObject *, QEvent *)
void	getMouseButton (int &button, int &buttonState) const
void	getZoomInKey (int &key, int &modifiers) const
void	getZoomOutKey (int &key, int &modifiers) const
bool	isEnabled () const
double	keyFactor () const
double	mouseFactor () const
QWidget *	parentWidget ()
const QWidget *	parentWidget () const
void	setEnabled (bool)
void	setKeyFactor (double)
void	setMouseButton (int button, int buttonState=Qt::NoButton)
void	setMouseFactor (double)
void	setWheelButtonState (int buttonState)
void	setWheelFactor (double)
void	setZoomInKey (int key, int modifiers)
void	setZoomOutKey (int key, int modifiers)
int	wheelButtonState () const
double	wheelFactor () const

Protected Member Functions
virtual void	rescale (double factor)
Protected Member Functions inherited from QwtMagnifier
virtual void	widgetKeyPressEvent (QKeyEvent *)
virtual void	widgetKeyReleaseEvent (QKeyEvent *)
virtual void	widgetMouseMoveEvent (QMouseEvent *)
virtual void	widgetMousePressEvent (QMouseEvent *)
virtual void	widgetMouseReleaseEvent (QMouseEvent *)
virtual void	widgetWheelEvent (QWheelEvent *)

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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

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Constructor & Destructor Documentation

QwtPlotMagnifier::QwtPlotMagnifier ( QwtPlotCanvas *  canvas )

explicit

Constructor

Parameters:

canvas

Plot canvas to be magnified

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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 )

protectedvirtual

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.

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()