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

#include <qwt_plot_magnifier.h>

Inheritance diagram for QwtPlotMagnifier:

Classes
class	PrivateData

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

Public Member Functions
	QwtPlotMagnifier (QWidget *)
	Constructor.

virtual	~QwtPlotMagnifier ()
	Destructor.

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

bool	isAxisEnabled (QwtAxisId) const
	Test if an axis is enabled.

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 *)
	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.

Additional Inherited Members
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	widgetKeyPressEvent (QKeyEvent *)
	Handle a key press event for the observed widget.

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

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 ( QwtAxisId axisId ) const

Test if an axis is enabled.

Parameters

axisId Axis

Returns: True, if the axis is enabled

See also: setAxisEnabled()

◆ rescale

void QwtPlotMagnifier::rescale ( double factor )

virtualslot

Zoom in/out the axes scales.

Parameters

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

◆ 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()

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

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

Classes

Public Slots

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotMagnifier()

Member Function Documentation

◆ isAxisEnabled()

◆ rescale

◆ setAxisEnabled()