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

#include <qwt_magnifier.h>

Inheritance diagram for QwtMagnifier:

Classes
class	PrivateData

Public Member Functions
virtual bool	eventFilter (QObject , QEvent )
	Event filter. More...

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

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

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

bool	isEnabled () const

double	keyFactor () const

double	mouseFactor () const

QWidget *	parentWidget ()

const QWidget *	parentWidget () const

	QwtMagnifier (QWidget *)

void	setEnabled (bool)
	En/disable the magnifier. More...

void	setKeyFactor (double)
	Change the key factor. More...

void	setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)

void	setMouseFactor (double)
	Change the mouse factor. More...

void	setWheelFactor (double)
	Change the wheel factor. More...

void	setWheelModifiers (Qt::KeyboardModifiers)

void	setZoomInKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)

void	setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)

double	wheelFactor () const

Qt::KeyboardModifiers	wheelModifiers () const

virtual	~QwtMagnifier ()
	Destructor. More...

Protected Member Functions
virtual void	rescale (double factor)=0

virtual void	widgetKeyPressEvent (QKeyEvent *)

virtual void	widgetKeyReleaseEvent (QKeyEvent *)

virtual void	widgetMouseMoveEvent (QMouseEvent *)

virtual void	widgetMousePressEvent (QMouseEvent *)

virtual void	widgetMouseReleaseEvent (QMouseEvent *)

virtual void	widgetWheelEvent (QWheelEvent *)

Private Attributes
PrivateData *	d_data

Detailed Description

QwtMagnifier provides zooming, by magnifying in steps.

Using QwtMagnifier a plot can be zoomed in/out in steps using keys, the mouse wheel or moving a mouse button in vertical direction.

Definition at line 27 of file qwt_magnifier.h.

Constructor & Destructor Documentation

QwtMagnifier::QwtMagnifier ( QWidget * parent )

explicit

Constructor

Parameters

parent Widget to be magnified

Definition at line 62 of file qwt_magnifier.cpp.

QwtMagnifier::~QwtMagnifier ( )

virtual

Destructor.

Definition at line 77 of file qwt_magnifier.cpp.

Member Function Documentation

bool QwtMagnifier::eventFilter	(	QObject *	object,
		QEvent *	event
	)

virtual

Event filter.

When isEnabled() is true, the mouse events of the observed widget are filtered.

Parameters

object	Object to be filtered
event	Event

Returns: Forwarded to QObject::eventFilter()

See also: widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent() widgetKeyReleaseEvent()

Definition at line 316 of file qwt_magnifier.cpp.

void QwtMagnifier::getMouseButton	(	Qt::MouseButton &	button,
		Qt::KeyboardModifiers &	modifiers
	)		const

See also: setMouseButton()

Definition at line 209 of file qwt_magnifier.cpp.

void QwtMagnifier::getZoomInKey	(	int &	key,
		Qt::KeyboardModifiers &	modifiers
	)		const

Retrieve the settings of the zoom in key.

Parameters

key	Key code, see Qt::Key
modifiers	Keyboard modifiers

See also: setZoomInKey()

Definition at line 264 of file qwt_magnifier.cpp.

void QwtMagnifier::getZoomOutKey	(	int &	key,
		Qt::KeyboardModifiers &	modifiers
	)		const

Retrieve the settings of the zoom out key.

Parameters

key	Key code, see Qt::Key
modifiers	Keyboard modifiers

See also: setZoomOutKey()

Definition at line 294 of file qwt_magnifier.cpp.

bool QwtMagnifier::isEnabled ( ) const

Returns: true when enabled, false otherwise

See also: setEnabled(), eventFilter()

Definition at line 112 of file qwt_magnifier.cpp.

double QwtMagnifier::keyFactor ( ) const

Returns: Key factor

See also: setKeyFactor()

Definition at line 236 of file qwt_magnifier.cpp.

double QwtMagnifier::mouseFactor ( ) const

Returns: Mouse factor

See also: setMouseFactor()

Definition at line 187 of file qwt_magnifier.cpp.

QWidget * QwtMagnifier::parentWidget ( )

Returns: Parent widget, where the rescaling happens

Definition at line 490 of file qwt_magnifier.cpp.

const QWidget * QwtMagnifier::parentWidget ( ) const

Returns: Parent widget, where the rescaling happens

Definition at line 496 of file qwt_magnifier.cpp.

virtual void QwtMagnifier::rescale ( double factor )

protectedpure virtual

Rescale the parent widget

Parameters

factor Scale factor

Implemented in QwtPlotMagnifier, and PlotMagnifier.

void QwtMagnifier::setEnabled ( bool on )

En/disable the magnifier.

When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.

Parameters

on	true or false

See also: isEnabled(), eventFilter()

Definition at line 91 of file qwt_magnifier.cpp.

void QwtMagnifier::setKeyFactor ( double factor )

Change the key factor.

The key factor defines the ratio between the current range on the parent widget and the zoomed range for each key press of the zoom in/out keys. The default value is 0.9.

Parameters

factor Key factor

See also: keyFactor(), setZoomInKey(), setZoomOutKey(), setWheelFactor, setMouseFactor()

Definition at line 227 of file qwt_magnifier.cpp.

void QwtMagnifier::setMouseButton	(	Qt::MouseButton	button,
		Qt::KeyboardModifiers	modifiers = `Qt::NoModifier`
	)

Assign the mouse button, that is used for zooming in/out. The default value is Qt::RightButton.

Parameters

button	Button
modifiers	Keyboard modifiers

See also: getMouseButton()

Definition at line 201 of file qwt_magnifier.cpp.

void QwtMagnifier::setMouseFactor ( double factor )

Change the mouse factor.

The mouse factor defines the ratio between the current range on the parent widget and the zoomed range for each vertical mouse movement. The default value is 0.95.

Parameters

factor Wheel factor

See also: mouseFactor(), setMouseButton(), setWheelFactor(), setKeyFactor()

Definition at line 178 of file qwt_magnifier.cpp.

void QwtMagnifier::setWheelFactor ( double factor )

Change the wheel factor.

The wheel factor defines the ratio between the current range on the parent widget and the zoomed range for each step of the wheel.

Use values > 1 for magnification (i.e. 2.0) and values < 1 for scaling down (i.e. 1/2.0 = 0.5). You can use this feature for inverting the direction of the wheel.

The default value is 0.9.

Parameters

factor Wheel factor

See also: wheelFactor(), setWheelButtonState(), setMouseFactor(), setKeyFactor()

Definition at line 133 of file qwt_magnifier.cpp.

void QwtMagnifier::setWheelModifiers ( Qt::KeyboardModifiers modifiers )

Assign keyboard modifiers for zooming in/out using the wheel. The default modifiers are Qt::NoModifiers.

Parameters

modifiers Keyboard modifiers

See also: wheelModifiers()

Definition at line 154 of file qwt_magnifier.cpp.

void QwtMagnifier::setZoomInKey	(	int	key,
		Qt::KeyboardModifiers	modifiers = `Qt::NoModifier`
	)

Assign the key, that is used for zooming in. The default combination is Qt::Key_Plus + Qt::NoModifier.

Parameters

key
modifiers

See also: getZoomInKey(), setZoomOutKey()

Definition at line 249 of file qwt_magnifier.cpp.

void QwtMagnifier::setZoomOutKey	(	int	key,
		Qt::KeyboardModifiers	modifiers = `Qt::NoModifier`
	)

Assign the key, that is used for zooming out. The default combination is Qt::Key_Minus + Qt::NoModifier.

Parameters

key
modifiers

See also: getZoomOutKey(), setZoomOutKey()

Definition at line 279 of file qwt_magnifier.cpp.

double QwtMagnifier::wheelFactor ( ) const

Returns: Wheel factor

See also: setWheelFactor()

Definition at line 142 of file qwt_magnifier.cpp.

Qt::KeyboardModifiers QwtMagnifier::wheelModifiers ( ) const

Returns: Wheel modifiers

See also: setWheelModifiers()

Definition at line 163 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetKeyPressEvent ( QKeyEvent * keyEvent )

protectedvirtual

Handle a key press event for the observed widget.

Parameters

keyEvent Key event

See also: eventFilter(), widgetKeyReleaseEvent()

Definition at line 464 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetKeyReleaseEvent ( QKeyEvent * keyEvent )

protectedvirtual

Handle a key release event for the observed widget.

Parameters

keyEvent Key event

See also: eventFilter(), widgetKeyReleaseEvent()

Definition at line 484 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetMouseMoveEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse move event for the observed widget.

Parameters

mouseEvent Mouse event

See also: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),

Definition at line 406 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetMousePressEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse press event for the observed widget.

Parameters

mouseEvent Mouse event

See also: eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()

Reimplemented in PlotMagnifier.

Definition at line 364 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetMouseReleaseEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse release event for the observed widget.

Parameters

mouseEvent Mouse event

See also: eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),

Definition at line 389 of file qwt_magnifier.cpp.

void QwtMagnifier::widgetWheelEvent ( QWheelEvent * wheelEvent )

protectedvirtual

Handle a wheel event for the observed widget.

Parameters

wheelEvent Wheel event

See also: eventFilter()

Reimplemented in PlotMagnifier.

Definition at line 430 of file qwt_magnifier.cpp.

Member Data Documentation

PrivateData* QwtMagnifier::d_data

private

Definition at line 82 of file qwt_magnifier.h.

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

Classes

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation