QwtPlotCachePanner provides panning of a plot canvas 更多...

#include <qwt_plot_cache_panner.h>

类 QwtPlotCachePanner 继承关系图:

类
class	PrivateData

Public 槽
virtual void	moveCanvas (int dx, int dy)
	Move the canvas by the specified offset

Public 成员函数
	QwtPlotCachePanner (QWidget *)
	Constructor

	~QwtPlotCachePanner () override
	Destructor

QWidget *	canvas ()
	Get the canvas widget

const QWidget *	canvas () const
	Get the canvas widget (const version)

QwtPlot *	plot ()
	Get the plot widget

const QwtPlot *	plot () const
	Get the plot widget (const version)

void	setAxisEnabled (QwtAxisId axisId, bool on)
	Enable or disable an axis for panning

bool	isAxisEnabled (QwtAxisId) const
	Check if an axis is enabled for panning

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 QBitmap	contentsMask () const override
	Get the contents mask

virtual QPixmap	grab () const override
	Grab the canvas

Protected 成员函数继承自 QwtCachePanner
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	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

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

QwtPlotCachePanner provides panning of a plot canvas

QwtPlotCachePanner is a panner for a plot canvas, that adjusts the scales of the axes after dropping the canvas on its new position.

Together with QwtPlotZoomer and QwtPlotMagnifier powerful ways of navigating on a QwtPlot widget can be implemented easily.

注解: The axes are not updated, while dragging the canvas

参见: QwtPlotZoomer, QwtPlotMagnifier

构造及析构函数说明

◆ QwtPlotCachePanner()

QwtPlotCachePanner::QwtPlotCachePanner ( QWidget * canvas )

explicit

Constructor

Constructs a panner for the canvas of a QwtPlot

Creates a QwtPlotCachePanner object attached to the given canvas. The panner is enabled for all axes by default.

参数

canvas Plot canvas to pan, also becomes the parent object

参见: setAxisEnabled()

Destructor

Releases all resources held by the panner.

成员函数说明

◆ canvas() [1/2]

QWidget * QwtPlotCachePanner::canvas ( )

Get the canvas widget

Returns the observed plot canvas

返回: Pointer to the canvas widget

◆ canvas() [2/2]

const QWidget * QwtPlotCachePanner::canvas ( ) const

Get the canvas widget (const version)

Returns the observed plot canvas (const version)

返回: Const pointer to the canvas widget

◆ contentsMask()

QBitmap QwtPlotCachePanner::contentsMask ( ) const

overrideprotectedvirtual

Get the contents mask

Calculate a mask from the border path of the canvas

返回: Mask as bitmap

参见: QwtPlotCanvas::borderPath()

重载 QwtCachePanner .

◆ grab()

QPixmap QwtPlotCachePanner::grab ( ) const

overrideprotectedvirtual

Grab the canvas

返回: Pixmap with the content of the canvas

重载 QwtCachePanner .

◆ isAxisEnabled()

bool QwtPlotCachePanner::isAxisEnabled ( QwtAxisId axisId ) const

Check if an axis is enabled for panning

Tests if an axis is enabled for panning

参数

axisId Axis identifier to test

返回: True if the axis is enabled, false otherwise

参见: setAxisEnabled(), moveCanvas()

◆ moveCanvas

void QwtPlotCachePanner::moveCanvas	(	int	dx,
		int	dy
	)

virtualslot

Move the canvas by the specified offset

Adjusts the enabled axes according to the pixel offset

Moves the canvas by the specified pixel offset and updates the axis scales accordingly. Only enabled axes are affected.

参数

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

参见: QwtPanner::panned(), setAxisEnabled()

◆ plot() [1/2]

QwtPlot * QwtPlotCachePanner::plot ( )

Get the plot widget

Returns the plot widget containing the observed canvas

返回: Pointer to the QwtPlot widget, or nullptr if not found

◆ plot() [2/2]

const QwtPlot * QwtPlotCachePanner::plot ( ) const

Get the plot widget (const version)

Returns the plot widget containing the observed canvas (const version)

返回: Const pointer to the QwtPlot widget, or nullptr if not found

◆ setAxisEnabled()

void QwtPlotCachePanner::setAxisEnabled	(	QwtAxisId	axisId,
		bool	on
	)

Enable or disable an axis for panning

Enables or disables an axis for panning

Axes that are enabled will be synchronized to the result of panning. All other axes will remain unchanged.

参数

axisId	Axis identifier
on	True to enable, false to disable

参见: isAxisEnabled(), moveCanvas()

该类的文档由以下文件生成:

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

类

Public 槽

Public 成员函数

Protected 成员函数

额外继承的成员函数

详细描述

构造及析构函数说明

◆ QwtPlotCachePanner()

成员函数说明

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ contentsMask()

◆ grab()

◆ isAxisEnabled()

◆ moveCanvas

◆ plot() [1/2]

◆ plot() [2/2]

◆ setAxisEnabled()