QwtPlotPanner provides panning of a plot canvas. More...

#include <qwt_plot_cache_panner.h>

Inheritance diagram for QwtPlotCachePanner:

Classes
class	PrivateData

Public Slots
virtual void	moveCanvas (int dx, int dy)
	Adjust the enabled axes according to dx/dy.

Public Member Functions
	QwtPlotCachePanner (QWidget *)
	A panner for the canvas of a QwtPlot.

virtual	~QwtPlotCachePanner ()
	Destructor.

QWidget *	canvas ()
	Return observed plot canvas.

const QWidget *	canvas () const
	Return Observed plot canvas.

QwtPlot *	plot ()
	Return plot widget, containing the observed plot canvas.

const QwtPlot *	plot () const
	Return plot widget, containing the observed plot canvas.

void	setAxisEnabled (QwtAxisId axisId, bool on)
	En/Disable an axis.

bool	isAxisEnabled (QwtAxisId) const
	Test if an axis is enabled.

Public Member Functions inherited from QwtCachePanner
	QwtCachePanner (QWidget *parent)
	Creates an panner that is enabled for the left mouse button.

virtual	~QwtCachePanner ()
	Destructor.

void	setEnabled (bool)
	En/disable the panner.

bool	isEnabled () const

void	setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)
	Change the mouse button and modifiers used for panning The defaults are Qt::LeftButton and Qt::NoModifier.

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 The defaults are Qt::Key_Escape and Qt::NoModifiers.

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 The default is the cursor of the parent widget.

const QCursor	cursor () const

void	setOrientations (Qt::Orientations)
	Set the orientations, where panning is enabled The default value is in both directions: Qt::Horizontal \| Qt::Vertical.

Qt::Orientations	orientations () const
	Return the orientation, where panning is enabled.

bool	isOrientationEnabled (Qt::Orientation) const

virtual bool	eventFilter (QObject , QEvent ) QWT_OVERRIDE
	Event filter.

Protected Member Functions
virtual QBitmap	contentsMask () const QWT_OVERRIDE
	Calculate a mask from the border path of the canvas.

virtual QPixmap	grab () const QWT_OVERRIDE

Protected Member Functions inherited from 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 *) QWT_OVERRIDE
	Paint event.

Additional Inherited Members
Signals inherited from 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.

Detailed Description

QwtPlotPanner provides panning of a plot canvas.

QwtPlotPanner 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.

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

See also: QwtPlotZoomer, QwtPlotMagnifier

Constructor & Destructor Documentation

◆ QwtPlotCachePanner()

QwtPlotCachePanner::QwtPlotCachePanner ( QWidget * canvas )

explicit

A panner for the canvas of a QwtPlot.

The panner is enabled for all axes

Parameters

canvas Plot canvas to pan, also the parent object

See also: setAxisEnabled()

Member Function Documentation

◆ contentsMask()

QBitmap QwtPlotCachePanner::contentsMask ( ) const

protectedvirtual

Calculate a mask from the border path of the canvas.

Returns: Mask as bitmap

See also: QwtPlotCanvas::borderPath()

Reimplemented from QwtCachePanner.

◆ grab()

QPixmap QwtPlotCachePanner::grab ( ) const

protectedvirtual

Returns: Pixmap with the content of the canvas

Reimplemented from QwtCachePanner.

◆ isAxisEnabled()

bool QwtPlotCachePanner::isAxisEnabled ( QwtAxisId axisId ) const

Test if an axis is enabled.

Parameters

axisId Axis

Returns: True, if the axis is enabled

See also: setAxisEnabled(), moveCanvas()

◆ moveCanvas

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

virtualslot

Adjust the enabled axes according to dx/dy.

Parameters

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

See also: QwtPanner::panned()

◆ setAxisEnabled()

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

En/Disable an axis.

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

Parameters

axisId	Axis id
on	On/Off

See also: isAxisEnabled(), moveCanvas()

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

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

Classes

Public Slots

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotCachePanner()

Member Function Documentation

◆ contentsMask()

◆ grab()

◆ isAxisEnabled()

◆ moveCanvas

◆ setAxisEnabled()