QwtPlotPanner Class Reference

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

#include <qwt_plot_panner.h>

Inheritance diagram for QwtPlotPanner:

Public Member Functions
	QwtPlotPanner (QWidget *)
	A panner for the canvas of a QwtPlot. More...
virtual	~QwtPlotPanner ()
	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 (int axis, bool on)
	En/Disable an axis. More...
bool	isAxisEnabled (int axis) const
Public Member Functions inherited from QwtPanner
	QwtPanner (QWidget *parent)
virtual	~QwtPanner ()
	Destructor.
void	setEnabled (bool)
	En/disable the panner. More...
bool	isEnabled () const
void	setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=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)
void	getAbortKey (int &key, Qt::KeyboardModifiers &) const
	Get the abort key and modifiers.
void	setCursor (const QCursor &)
const QCursor	cursor () const
void	setOrientations (Qt::Orientations)
Qt::Orientations	orientations () const
	Return the orientation, where paning is enabled.
bool	isOrientationEnabled (Qt::Orientation) const
virtual bool	eventFilter (QObject *, QEvent *)
	Event filter. More...

Protected Slots
virtual void	moveCanvas (int dx, int dy)

Protected Member Functions
virtual QBitmap	contentsMask () const
virtual QPixmap	grab () const
Protected Member Functions inherited from QwtPanner
virtual void	widgetMousePressEvent (QMouseEvent *)
virtual void	widgetMouseReleaseEvent (QMouseEvent *)
virtual void	widgetMouseMoveEvent (QMouseEvent *)
virtual void	widgetKeyPressEvent (QKeyEvent *)
virtual void	widgetKeyReleaseEvent (QKeyEvent *)
virtual void	paintEvent (QPaintEvent *)
	Paint event. More...

Additional Inherited Members
Signals inherited from QwtPanner
void	panned (int dx, int dy)
void	moved (int dx, int dy)

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

QwtPlotPanner()

QwtPlotPanner::QwtPlotPanner ( 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 QwtPlotPanner::contentsMask ( ) const

protectedvirtual

Calculate a mask from the border path of the canvas

Returns

Mask as bitmap

See also

QwtPlotCanvas::borderPath()

Reimplemented from QwtPanner.

grab()

QPixmap QwtPlotPanner::grab ( ) const

protectedvirtual

Returns

Pixmap with the content of the canvas

Reimplemented from QwtPanner.

isAxisEnabled()

bool QwtPlotPanner::isAxisEnabled

(

int

axis

)

const

Test if an axis is enabled

Parameters

axis	Axis, see QwtPlot::Axis

Returns

True, if the axis is enabled

See also

setAxisEnabled(), moveCanvas()

moveCanvas

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

protectedvirtualslot

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 QwtPlotPanner::setAxisEnabled	(	int	axis,
		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

axis	Axis, see QwtPlot::Axis
on	On/Off

See also

isAxisEnabled(), moveCanvas()