QwtPolarCachePanner类 参考

QwtPolarCachePanner provides panning of a polar plot canvas 更多...

#include <qwt_polar_cache_panner.h>

类 QwtPolarCachePanner 继承关系图:

Public 槽
virtual void	movePlot (int dx, int dy)
	Move the plot

Public 成员函数
	QwtPolarCachePanner (QwtPolarCanvas *)
	Constructor
	~QwtPolarCachePanner () override
	Destructor
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 QwtCachePanner
	QwtCachePanner (QWidget *parent)
	Creates a panner that is enabled for the left mouse button
void	setEnabled (bool)
	En/disable the panner
bool	isEnabled () const
	Return whether the panner is enabled
void	setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)
	Change the mouse button and modifiers used for panning
void	getMouseButton (Qt::MouseButton &button, Qt::KeyboardModifiers &) const
	Get mouse button and modifiers used for panning
void	setAbortKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
	Change the abort key
void	getAbortKey (int &key, Qt::KeyboardModifiers &) const
	Get the abort key and modifiers
void	setCursor (const QCursor &)
	Change the cursor that is active while panning
const QCursor	cursor () const
	Return the cursor that is active while panning
void	setOrientations (Qt::Orientations)
	Set the orientations where panning is enabled
Qt::Orientations	orientations () const
	Return the orientation where panning is enabled
bool	isOrientationEnabled (Qt::Orientation) const
	Check if an orientation is enabled
virtual bool	eventFilter (QObject *, QEvent *) override
	Event filter

Protected 成员函数
virtual void	widgetMousePressEvent (QMouseEvent *) override
	Handle mouse press events
Protected 成员函数 继承自 QwtCachePanner
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	widgetKeyPressEvent (QKeyEvent *)
	Handle a key press event for the observed widget.
virtual void	widgetKeyReleaseEvent (QKeyEvent *)
	Handle a key release event for the observed widget.
virtual void	paintEvent (QPaintEvent *) override
	Paint event
virtual QBitmap	contentsMask () const
	Calculate a mask for the contents of the panned widget
virtual QPixmap	grab () const
	Grab the widget into a pixmap

额外继承的成员函数
信号 继承自 QwtCachePanner
void	panned (int dx, int dy)
	Signal emitted when panning is done
void	moved (int dx, int dy)
	Signal emitted while the widget moved, but panning is not finished

详细描述

QwtPolarCachePanner provides panning of a polar plot canvas

QwtPolarPanner is a panner for a QwtPolarCanvas, that adjusts the visible area after dropping the canvas on its new position.

Together with QwtPolarMagnifier individual ways of navigating on a QwtPolarPlot widget can be implemented easily.

参见

QwtPolarMagnifier

构造及析构函数说明

QwtPolarCachePanner()

QwtPolarCachePanner::QwtPolarCachePanner ( QwtPolarCanvas *  canvas )

explicit

Constructor

Create a plot panner for a polar plot canvas

参数

canvas

Plot canvas to be panned

成员函数说明

canvas() [1/2]

QwtPolarCanvas * QwtPolarCachePanner::canvas

(

)

Get the canvas

Get the observed plot canvas

返回

Observed plot canvas

canvas() [2/2]

const QwtPolarCanvas * QwtPolarCachePanner::canvas

(

)

const

Get the canvas (const version)

Get the observed plot canvas (const version)

返回

Observed plot canvas

movePlot

void QwtPolarCachePanner::movePlot ( int  dx, int  dy  )

virtualslot

Move the plot

Adjust the zoomed area according to dx/dy

参数

dx	Pixel offset in x direction
dy	Pixel offset in y direction

参见

QwtPanner::panned(), QwtPolarPlot::zoom()

plot() [1/2]

QwtPolarPlot * QwtPolarCachePanner::plot

(

)

Get the plot

Get the observed plot

返回

Observed plot

plot() [2/2]

const QwtPolarPlot * QwtPolarCachePanner::plot

(

)

const

Get the plot (const version)

Get the observed plot (const version)

返回

Observed plot

widgetMousePressEvent()

void QwtPolarCachePanner::widgetMousePressEvent ( QMouseEvent *  event )

overrideprotectedvirtual

Handle mouse press events

Block panning when the plot zoom factor is >= 1.0.

参数

event

Mouse event

重载 QwtCachePanner .

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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_cache_panner.h
• /home/runner/work/QWT/QWT/src/plot/qwt_polar_cache_panner.cpp