QwtMagnifier provides zooming by magnifying in steps 更多...

#include <qwt_magnifier.h>

类 QwtMagnifier 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtMagnifier (QWidget *)
	Constructor

QWidget *	parentWidget ()
	Return the parent widget where the rescaling happens

const QWidget *	parentWidget () const
	Return the parent widget where the rescaling happens

void	setEnabled (bool)
	En/disable the magnifier

bool	isEnabled () const
	Return whether the magnifier is enabled

void	setMouseFactor (double)
	Change the mouse factor

double	mouseFactor () const
	Return the mouse factor

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
	Get the mouse button and modifiers used for zooming

void	setWheelFactor (double)
	Change the wheel factor

double	wheelFactor () const
	Return the wheel factor

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

Qt::KeyboardModifiers	wheelModifiers () const
	Return the wheel modifiers

void	setKeyFactor (double)
	Change the key factor

double	keyFactor () const
	Return the key factor

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 ) override
	Event filter

Protected 成员函数
virtual void	rescale (double factor)=0

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.

详细描述

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.

构造及析构函数说明

◆ QwtMagnifier()

QwtMagnifier::QwtMagnifier ( QWidget * parent )

explicit

Constructor

参数

[in] parent Widget to be magnified

Destructor

成员函数说明

◆ eventFilter()

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

overridevirtual

Event filter

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

参数

[in]	object	Object to be filtered
[in]	event	Event

返回: Forwarded to QObject::eventFilter()

参见: widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

◆ getMouseButton()

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

Get the mouse button and modifiers used for zooming

参数

[out]	button	Mouse button used for zooming
[out]	modifiers	Keyboard modifiers used for zooming

参见: setMouseButton()

◆ getZoomInKey()

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

Retrieve the settings of the zoom in key

参数

[out]	key	Key code, see Qt::Key
[out]	modifiers	Keyboard modifiers

参见: setZoomInKey()

◆ getZoomOutKey()

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

Retrieve the settings of the zoom out key

参数

[out]	key	Key code, see Qt::Key
[out]	modifiers	Keyboard modifiers

参见: setZoomOutKey()

◆ isEnabled()

bool QwtMagnifier::isEnabled ( ) const

Return whether the magnifier is enabled

返回: true when enabled, false otherwise

参见: setEnabled(), eventFilter()

◆ keyFactor()

double QwtMagnifier::keyFactor ( ) const

Return the key factor

返回: Key factor

参见: setKeyFactor()

◆ mouseFactor()

double QwtMagnifier::mouseFactor ( ) const

Return the mouse factor

返回: Mouse factor

参见: setMouseFactor()

◆ parentWidget() [1/2]

QWidget * QwtMagnifier::parentWidget ( )

Return the parent widget where the rescaling happens

返回: Parent widget

◆ parentWidget() [2/2]

const QWidget * QwtMagnifier::parentWidget ( ) const

Return the parent widget where the rescaling happens

返回: Parent widget (const)

◆ setEnabled()

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.

参数

[in] on true or false

参见: isEnabled(), eventFilter()

◆ setKeyFactor()

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.

参数

[in] factor Key factor

参见: keyFactor(), setZoomInKey(), setZoomOutKey(), setWheelFactor(), setMouseFactor()

◆ setMouseButton()

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.

参数

[in]	button	Button
[in]	modifiers	Keyboard modifiers

参见: getMouseButton()

◆ setMouseFactor()

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.

参数

[in] factor Mouse factor

参见: mouseFactor(), setMouseButton(), setWheelFactor(), setKeyFactor()

◆ setWheelFactor()

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.

参数

[in] factor Wheel factor

参见: wheelFactor(), setWheelButtonState(), setMouseFactor(), setKeyFactor()

◆ setWheelModifiers()

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

Assign keyboard modifiers for zooming in/out using the wheel

The default modifiers are Qt::NoModifiers.

参数

[in] modifiers Keyboard modifiers

参见: wheelModifiers()

◆ setZoomInKey()

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.

参数

[in]	key	Key code
[in]	modifiers	Keyboard modifiers

参见: getZoomInKey(), setZoomOutKey()

◆ setZoomOutKey()

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.

参数

[in]	key	Key code
[in]	modifiers	Keyboard modifiers

参见: getZoomOutKey(), setZoomInKey()

◆ wheelFactor()

double QwtMagnifier::wheelFactor ( ) const

Return the wheel factor

返回: Wheel factor

参见: setWheelFactor()

◆ wheelModifiers()

Qt::KeyboardModifiers QwtMagnifier::wheelModifiers ( ) const

Return the wheel modifiers

返回: Wheel modifiers

参见: setWheelModifiers()

◆ widgetKeyPressEvent()

void QwtMagnifier::widgetKeyPressEvent ( QKeyEvent * keyEvent )

protectedvirtual

Handle a key press event for the observed widget.

参数

keyEvent Key event

参见: eventFilter(), widgetKeyReleaseEvent()

被 QwtPolarMagnifier 重载.

◆ widgetKeyReleaseEvent()

void QwtMagnifier::widgetKeyReleaseEvent ( QKeyEvent * keyEvent )

protectedvirtual

Handle a key release event for the observed widget.

参数

keyEvent Key event

参见: eventFilter(), widgetKeyReleaseEvent()

◆ widgetMouseMoveEvent()

void QwtMagnifier::widgetMouseMoveEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse move event for the observed widget.

参数

mouseEvent Mouse event

参见: eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),

◆ widgetMousePressEvent()

void QwtMagnifier::widgetMousePressEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse press event for the observed widget.

参数

mouseEvent Mouse event

参见: eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()

◆ widgetMouseReleaseEvent()

void QwtMagnifier::widgetMouseReleaseEvent ( QMouseEvent * mouseEvent )

protectedvirtual

Handle a mouse release event for the observed widget.

参数

mouseEvent Mouse event

参见: eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),

◆ widgetWheelEvent()

void QwtMagnifier::widgetWheelEvent ( QWheelEvent * wheelEvent )

protectedvirtual

Handle a wheel event for the observed widget.

参数

wheelEvent Wheel event

参见: eventFilter()

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_magnifier.h
/home/runner/work/QWT/QWT/src/plot/qwt_magnifier.cpp

类

Public 成员函数

Protected 成员函数

详细描述

构造及析构函数说明

◆ QwtMagnifier()

成员函数说明

◆ eventFilter()

◆ getMouseButton()

◆ getZoomInKey()

◆ getZoomOutKey()

◆ isEnabled()

◆ keyFactor()

◆ mouseFactor()

◆ parentWidget() [1/2]

◆ parentWidget() [2/2]

◆ setEnabled()

◆ setKeyFactor()

◆ setMouseButton()

◆ setMouseFactor()

◆ setWheelFactor()

◆ setWheelModifiers()

◆ setZoomInKey()

◆ setZoomOutKey()

◆ wheelFactor()

◆ wheelModifiers()

◆ widgetKeyPressEvent()

◆ widgetKeyReleaseEvent()

◆ widgetMouseMoveEvent()

◆ widgetMousePressEvent()

◆ widgetMouseReleaseEvent()

◆ widgetWheelEvent()