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

#include <qwt_polar_magnifier.h>

Inheritance diagram for QwtPolarMagnifier:

Classes
class	PrivateData

Public Slots
virtual void	rescale (double factor) QWT_OVERRIDE
	Zoom in/out the zoomed area.

void	unzoom ()
	Unzoom the plot widget.

Public Member Functions
	QwtPolarMagnifier (QwtPolarCanvas *)
	Constructor.

virtual	~QwtPolarMagnifier ()
	Destructor.

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

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 *)
	Constructor.

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)
	Assign the mouse button, that is used for zooming in/out.

void	getMouseButton (Qt::MouseButton &, Qt::KeyboardModifiers &) const

void	setWheelFactor (double)
	Change the wheel factor.

double	wheelFactor () const

void	setWheelModifiers (Qt::KeyboardModifiers)
	Assign keyboard modifiers for zooming in/out using the wheel.

Qt::KeyboardModifiers	wheelModifiers () const

void	setKeyFactor (double)
	Change the key factor.

double	keyFactor () const

void	setZoomInKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
	Assign the key, that is used for zooming in.

void	getZoomInKey (int &key, Qt::KeyboardModifiers &) const
	Retrieve the settings of the zoom in key.

void	setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
	Assign the key, that is used for zooming out.

void	getZoomOutKey (int &key, Qt::KeyboardModifiers &) const
	Retrieve the settings of the zoom out key.

virtual bool	eventFilter (QObject , QEvent ) QWT_OVERRIDE
	Event filter.

Protected Member Functions
virtual void	widgetKeyPressEvent (QKeyEvent *) QWT_OVERRIDE
	Handle a key press event for the observed widget.

Protected Member Functions inherited from QwtMagnifier
virtual void	rescale (double factor)=0
	Rescale the parent widget.

virtual void	widgetMousePressEvent (QMouseEvent *)
	Handle a mouse press event for the observed widget.

virtual void	widgetMouseReleaseEvent (QMouseEvent *)
	Handle a mouse release event for the observed widget.

virtual void	widgetMouseMoveEvent (QMouseEvent *)
	Handle a mouse move event for the observed widget.

virtual void	widgetWheelEvent (QWheelEvent *)
	Handle a wheel event for the observed widget.

virtual void	widgetKeyReleaseEvent (QKeyEvent *)
	Handle a key release event for the observed widget.

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

Constructor & Destructor Documentation

◆ QwtPolarMagnifier()

QwtPolarMagnifier::QwtPolarMagnifier ( QwtPolarCanvas * canvas )

explicit

Constructor.

Parameters

canvas Plot canvas to be magnified

Member Function Documentation

◆ canvas() [1/2]

QwtPolarCanvas * QwtPolarMagnifier::canvas ( )

Returns: Observed plot canvas

◆ canvas() [2/2]

const QwtPolarCanvas * QwtPolarMagnifier::canvas ( ) const

Returns: Observed plot canvas

◆ 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()

◆ plot() [1/2]

QwtPolarPlot * QwtPolarMagnifier::plot ( )

Returns: Observed plot

◆ plot() [2/2]

const QwtPolarPlot * QwtPolarMagnifier::plot ( ) const

Returns: observed plot

◆ rescale

void QwtPolarMagnifier::rescale ( double factor )

virtualslot

Zoom in/out the zoomed area.

Parameters

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

◆ 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()

◆ widgetKeyPressEvent()

void QwtPolarMagnifier::widgetKeyPressEvent ( QKeyEvent * event )

protectedvirtual

Handle a key press event for the observed widget.

Parameters

event Key event

Reimplemented from QwtMagnifier.

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/qwt_polar_magnifier.h
/home/runner/work/QWT/QWT/src/qwt_polar_magnifier.cpp

Classes

Public Slots

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QwtPolarMagnifier()

Member Function Documentation

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ getUnzoomKey()

◆ plot() [1/2]

◆ plot() [2/2]

◆ rescale

◆ setUnzoomKey()

◆ widgetKeyPressEvent()