QwtPolarMagnifier类 参考

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

#include <qwt_polar_magnifier.h>

类 QwtPolarMagnifier 继承关系图:

类
class	PrivateData

Public 槽
virtual void	rescale (double factor) override
	Rescale the plot
void	unzoom ()
	Unzoom the plot

Public 成员函数
	QwtPolarMagnifier (QwtPolarCanvas *)
	Constructor
	~QwtPolarMagnifier () override
	Destructor
void	setUnzoomKey (int key, int modifiers)
	Set the unzoom key
void	getUnzoomKey (int &key, int &modifiers) const
	Get the unzoom key
QwtPolarPlot *	plot ()
	Get the plot
const QwtPolarPlot *	plot () const
	Get the plot (const version)
QwtPolarCanvas *	canvas ()
	Get the canvas
const QwtPolarCanvas *	canvas () const
	Get the canvas (const version)
Public 成员函数 继承自 QwtMagnifier
	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	widgetKeyPressEvent (QKeyEvent *) override
	Handle key press events
Protected 成员函数 继承自 QwtMagnifier
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	widgetKeyReleaseEvent (QKeyEvent *)
	Handle a key release event for the observed widget.

详细描述

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.

参见

QwtPolarPanner, QwtPolarPlot, QwtPolarCanvas

构造及析构函数说明

QwtPolarMagnifier()

QwtPolarMagnifier::QwtPolarMagnifier ( QwtPolarCanvas *  canvas )

explicit

Constructor

参数

canvas

Plot canvas to be magnified

Destructor

成员函数说明

canvas() [1/2]

QwtPolarCanvas * QwtPolarMagnifier::canvas

(

)

Get the canvas

Get the observed plot canvas

返回

Observed plot canvas

canvas() [2/2]

const QwtPolarCanvas * QwtPolarMagnifier::canvas

(

)

const

Get the canvas (const version)

Get the observed plot canvas (const version)

返回

Observed plot canvas

getUnzoomKey()

void QwtPolarMagnifier::getUnzoomKey	(	int &	key,
		int &	modifiers
	)		const

Get the unzoom key

Get the key and modifiers that are used for unzooming

参数

[out]	key	Key code
[out]	modifiers	Modifiers

参见

setUnzoomKey(), QwtPolarPlot::unzoom()

plot() [1/2]

QwtPolarPlot * QwtPolarMagnifier::plot

(

)

Get the plot

Get the observed plot

返回

Observed plot

plot() [2/2]

const QwtPolarPlot * QwtPolarMagnifier::plot

(

)

const

Get the plot (const version)

Get the observed plot (const version)

返回

Observed plot

rescale

void QwtPolarMagnifier::rescale ( double  factor )

overridevirtualslot

Rescale the plot

Zoom in/out the zoomed area

参数

factor

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

setUnzoomKey()

void QwtPolarMagnifier::setUnzoomKey	(	int	key,
		int	modifiers
	)

Set the unzoom key

Assign key and modifiers that are used for unzooming

The default combination is Qt::Key_Home + Qt::NoModifier.

参数

key	Key code
modifiers	Modifiers

参见

getUnzoomKey(), QwtPolarPlot::unzoom()

unzoom

void QwtPolarMagnifier::unzoom ( )

slot

Unzoom the plot

Unzoom the plot widget

widgetKeyPressEvent()

void QwtPolarMagnifier::widgetKeyPressEvent ( QKeyEvent *  event )

overrideprotectedvirtual

Handle key press events

Handle a key press event for the observed widget.

参数

event

Key event

重载 QwtMagnifier .

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该类的文档由以下文件生成:

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