QwtPolarMagnifier Class Reference

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

#include <qwt_polar_magnifier.h>

Inheritance diagram for QwtPolarMagnifier:

Public Slots
virtual void	rescale (double factor) override
void	unzoom ()
	Unzoom the plot widget.

Public Member Functions
	QwtPolarMagnifier (QwtPolarCanvas *)
virtual	~QwtPolarMagnifier ()
	Destructor.
void	setUnzoomKey (int key, int modifiers)
void	getUnzoomKey (int &key, int &modifiers) const
QwtPolarPlot *	plot ()
const QwtPolarPlot *	plot () const
QwtPolarCanvas *	canvas ()
const QwtPolarCanvas *	canvas () const
Public Member Functions inherited from QwtMagnifier
	QwtMagnifier (QWidget *)
virtual	~QwtMagnifier ()
	Destructor.
QWidget *	parentWidget ()
const QWidget *	parentWidget () const
void	setEnabled (bool)
	En/disable the magnifier. More...
bool	isEnabled () const
void	setMouseFactor (double)
	Change the mouse factor. More...
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. More...
double	wheelFactor () const
void	setWheelModifiers (Qt::KeyboardModifiers)
Qt::KeyboardModifiers	wheelModifiers () const
void	setKeyFactor (double)
	Change the key factor. More...
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. More...
void	setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void	getZoomOutKey (int &key, Qt::KeyboardModifiers &) const
	Retrieve the settings of the zoom out key. More...
virtual bool	eventFilter (QObject *, QEvent *) override
	Event filter. More...

Protected Member Functions
virtual void	widgetKeyPressEvent (QKeyEvent *) override
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	widgetKeyReleaseEvent (QKeyEvent *)

Detailed Description

QwtPolarMagnifier 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 QwtPolarPanner it is possible to implement an individual navigation of the plot canvas.

See also

QwtPolarPanner, QwtPolarPlot, QwtPolarCanvas

Definition at line 30 of file qwt_polar_magnifier.h.

Constructor & Destructor Documentation

QwtPolarMagnifier()

QwtPolarMagnifier::QwtPolarMagnifier ( QwtPolarCanvas *  canvas )

explicit

Constructor

Parameters

canvas

Plot canvas to be magnified

Definition at line 34 of file qwt_polar_magnifier.cpp.

Member Function Documentation

canvas() [1/2]

QwtPolarCanvas * QwtPolarMagnifier::canvas

(

)

Returns

Observed plot canvas

Definition at line 74 of file qwt_polar_magnifier.cpp.

canvas() [2/2]

const QwtPolarCanvas * QwtPolarMagnifier::canvas

(

)

const

Returns

Observed plot canvas

Definition at line 80 of file qwt_polar_magnifier.cpp.

getUnzoomKey()

void QwtPolarMagnifier::getUnzoomKey	(	int &	key,
		int &	modifiers
	)		const

Returns

Key, and modifiers that are used for unzooming

Parameters

key	Key code
modifiers	Modifiers

See also

setUnzoomKey(), QwtPolarPlot::unzoom()

Definition at line 67 of file qwt_polar_magnifier.cpp.

plot() [1/2]

QwtPolarPlot * QwtPolarMagnifier::plot

(

)

Returns

Observed plot

Definition at line 86 of file qwt_polar_magnifier.cpp.

plot() [2/2]

const QwtPolarPlot * QwtPolarMagnifier::plot

(

)

const

Returns

observed plot

Definition at line 96 of file qwt_polar_magnifier.cpp.

rescale

void QwtPolarMagnifier::rescale ( double  factor )

overridevirtualslot

Zoom in/out the zoomed area

Parameters

factor

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

Definition at line 129 of file qwt_polar_magnifier.cpp.

setUnzoomKey()

void QwtPolarMagnifier::setUnzoomKey	(	int	key,
		int	modifiers
	)

Assign key and modifiers, that are used for unzooming The default combination is Qt::Key_Home + Qt::NoModifier.

Parameters

key	Key code
modifiers	Modifiers

See also

getUnzoomKey(), QwtPolarPlot::unzoom()

Definition at line 54 of file qwt_polar_magnifier.cpp.

widgetKeyPressEvent()

void QwtPolarMagnifier::widgetKeyPressEvent ( QKeyEvent *  event )

overrideprotectedvirtual

Handle a key press event for the observed widget.

Parameters

event

Key event

Reimplemented from QwtMagnifier.

Definition at line 110 of file qwt_polar_magnifier.cpp.