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

#include <qwt_plot_magnifier.h>

Inheritance diagram for QwtPlotMagnifier:

Public Member Functions
	QwtPlotMagnifier (QWidget *)

virtual	~QwtPlotMagnifier ()
	Destructor.

void	setAxisEnabled (int axis, bool on)
	En/Disable an axis. More...

bool	isAxisEnabled (int axis) 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. 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 )
	Event filter. More...

Protected Member Functions
virtual void	rescale (double factor)

Protected Member Functions inherited from QwtMagnifier
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

Constructor & Destructor Documentation

◆ QwtPlotMagnifier()

QwtPlotMagnifier::QwtPlotMagnifier ( QWidget * canvas )

explicit

Constructor

Parameters

canvas Plot canvas to be magnified

Member Function Documentation

◆ isAxisEnabled()

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()

◆ rescale()

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.

◆ setAxisEnabled()

void QwtPlotMagnifier::setAxisEnabled	(	int	axis,
		bool	on
	)

En/Disable an axis.

Only Axes that are enabled will be zoomed. All other axes will remain unchanged.

Parameters

axis	Axis, see QwtPlot::Axis
on	On/Off

See also: isAxisEnabled()

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotMagnifier()

Member Function Documentation

◆ isAxisEnabled()

◆ rescale()

◆ setAxisEnabled()