QwtPlotMagnifier Class Reference

QwtPlotMagnifier provides zooming, by magnifying in steps. More...

#include <qwt_plot_magnifier.h>

Inheritance diagram for QwtPlotMagnifier:

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.
Public Member Functions inherited from QwtMagnifier
	QwtMagnifier (QWidget *)
virtual	~QwtMagnifier ()
	Destructor.
QWidget *	parentWidget ()
const QWidget *	parentWidget () const
void	setEnabled (bool)
	En/disable the magnifier.
bool	isEnabled () const
void	setMouseFactor (double)
	Change the mouse factor.
double	mouseFactor () const
void	setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)
void	getMouseButton (Qt::MouseButton &, Qt::KeyboardModifiers &) const
void	setWheelFactor (double)
	Change the wheel factor.
double	wheelFactor () const
void	setWheelModifiers (Qt::KeyboardModifiers)
Qt::KeyboardModifiers	wheelModifiers () const
void	setKeyFactor (double)
	Change the key factor.
double	keyFactor () const
void	setZoomInKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void	getZoomInKey (int &key, Qt::KeyboardModifiers &) const
	Retrieve the settings of the zoom in key.
void	setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void	getZoomOutKey (int &key, Qt::KeyboardModifiers &) const
	Retrieve the settings of the zoom out key.
virtual bool	eventFilter (QObject *, QEvent *) override
	Event filter.

Additional Inherited Members
Protected Member Functions inherited from QwtMagnifier
virtual void	rescale (double factor)=0
virtual void	widgetMousePressEvent (QMouseEvent *)
virtual void	widgetMouseReleaseEvent (QMouseEvent *)
virtual void	widgetMouseMoveEvent (QMouseEvent *)
virtual void	widgetWheelEvent (QWheelEvent *)
virtual void	widgetKeyPressEvent (QKeyEvent *)
virtual void	widgetKeyReleaseEvent (QKeyEvent *)

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::QwtPlotMagnifier ( QWidget * canvas )

explicit

Constructor

Parameters

canvas

Plot canvas to be magnified

Definition at line 30 of file qwt_plot_magnifier.cpp.

~QwtPlotMagnifier()

QwtPlotMagnifier::~QwtPlotMagnifier ( )

virtual

Destructor.

Definition at line 37 of file qwt_plot_magnifier.cpp.

Member Function Documentation

canvas() [1/2]

QWidget * QwtPlotMagnifier::canvas

(

)

Return observed plot canvas.

Definition at line 76 of file qwt_plot_magnifier.cpp.

canvas() [2/2]

const QWidget * QwtPlotMagnifier::canvas

(

)

const

Return Observed plot canvas.

Definition at line 82 of file qwt_plot_magnifier.cpp.

isAxisEnabled()

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.

plot() [1/2]

QwtPlot * QwtPlotMagnifier::plot

(

)

Return plot widget, containing the observed plot canvas.

Definition at line 88 of file qwt_plot_magnifier.cpp.

plot() [2/2]

const QwtPlot * QwtPlotMagnifier::plot

(

)

const

Return plot widget, containing the observed plot canvas.

Definition at line 98 of file qwt_plot_magnifier.cpp.

rescale

void QwtPlotMagnifier::rescale ( double factor )

overridevirtualslot

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.

setAxisEnabled()

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.