QwtPlotPicker provides selections on a plot canvas. More...

#include <qwt_plot_picker.h>

Inheritance diagram for QwtPlotPicker:

Signals
void	appended (const QPointF &pos)
void	moved (const QPointF &pos)
void	selected (const QPointF &pos)
void	selected (const QRectF &rect)
void	selected (const QVector< QPointF > &pa)
Public Member Functions
QWidget *	canvas ()
const QWidget *	canvas () const
QwtPlot *	plot ()
const QwtPlot *	plot () const
	QwtPlotPicker (QWidget *canvas)
	Create a plot picker.
	QwtPlotPicker (int xAxis, int yAxis, QWidget *)
	QwtPlotPicker (int xAxis, int yAxis, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
virtual void	setAxis (int xAxis, int yAxis)
int	xAxis () const
	Return x axis.
int	yAxis () const
	Return y axis.
virtual	~QwtPlotPicker ()
	Destructor.
Protected Member Functions
virtual void	append (const QPoint &)
virtual bool	end (bool ok=true)
QRectF	invTransform (const QRect &) const
QPointF	invTransform (const QPoint &) const
virtual void	move (const QPoint &)
QRectF	scaleRect () const
virtual QwtText	trackerText (const QPoint &) const
virtual QwtText	trackerTextF (const QPointF &) const
	Translate a position into a position string.
QRect	transform (const QRectF &) const
QPoint	transform (const QPointF &) const
Private Attributes
int	d_xAxis
int	d_yAxis

Detailed Description

QwtPlotPicker provides selections on a plot canvas.

QwtPlotPicker is a QwtPicker tailored for selections on a plot canvas. It is set to a x-Axis and y-Axis and translates all pixel coordinates into this coordinate system.

Definition at line 27 of file qwt_plot_picker.h.

Constructor & Destructor Documentation

QwtPlotPicker::QwtPlotPicker ( QWidget * canvas ) [explicit]

Create a plot picker.

The picker is set to those x- and y-axis of the plot that are enabled. If both or no x-axis are enabled, the picker is set to QwtPlot::xBottom. If both or no y-axis are enabled, it is set to QwtPlot::yLeft.

Parameters:

canvas Plot canvas to observe, also the parent object

See also:: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 30 of file qwt_plot_picker.cpp.

QwtPlotPicker::~QwtPlotPicker ( ) [virtual]

Destructor.

Definition at line 99 of file qwt_plot_picker.cpp.

QwtPlotPicker::QwtPlotPicker	(	int	xAxis,
		int	yAxis,
		QWidget *	canvas
	)		`[explicit]`

Create a plot picker

Parameters:

xAxis	Set the x axis of the picker
yAxis	Set the y axis of the picker
canvas	Plot canvas to observe, also the parent object

See also:: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 68 of file qwt_plot_picker.cpp.

QwtPlotPicker::QwtPlotPicker	(	int	xAxis,
		int	yAxis,
		RubberBand	rubberBand,
		DisplayMode	trackerMode,
		QWidget *	canvas
	)		`[explicit]`

Create a plot picker

Parameters:

xAxis	X axis of the picker
yAxis	Y axis of the picker
rubberBand	Rubber band style
trackerMode	Tracker mode
canvas	Plot canvas to observe, also the parent object

See also:: QwtPicker, QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(), QwtPicker::setTrackerMode; QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 89 of file qwt_plot_picker.cpp.

Member Function Documentation

void QwtPlotPicker::append ( const QPoint & pos ) [protected, virtual]

Append a point to the selection and update rubber band and tracker.

Parameters:

pos	Additional point

See also:: isActive, begin(), end(), move(), appended()

Note:: The appended(const QPoint &), appended(const QDoublePoint &) signals are emitted.

Reimplemented from QwtPicker.

Definition at line 240 of file qwt_plot_picker.cpp.

void QwtPlotPicker::appended ( const QPointF & pos ) [signal]

A signal emitted when a point has been appended to the selection

Parameters:

pos	Position of the appended point.

See also:: append(). moved()

QWidget * QwtPlotPicker::canvas ( )

Returns:: Observed plot canvas

Definition at line 104 of file qwt_plot_picker.cpp.

const QWidget * QwtPlotPicker::canvas ( ) const

Returns:: Observed plot canvas

Definition at line 110 of file qwt_plot_picker.cpp.

bool QwtPlotPicker::end ( bool ok = true ) [protected, virtual]

Close a selection setting the state to inactive.

Parameters:

ok	If true, complete the selection and emit selected signals otherwise discard the selection.

Returns:: True if the selection has been accepted, false otherwise

Reimplemented from QwtPicker.

Reimplemented in QwtPlotZoomer.

Definition at line 269 of file qwt_plot_picker.cpp.

QRectF QwtPlotPicker::invTransform ( const QRect & rect ) const [protected]

Translate a rectangle from pixel into plot coordinates

Returns:: Rectangle in plot coordinates

See also:: transform()

Definition at line 330 of file qwt_plot_picker.cpp.

QPointF QwtPlotPicker::invTransform ( const QPoint & pos ) const [protected]

Translate a point from pixel into plot coordinates

Returns:: Point in plot coordinates

See also:: transform()

Definition at line 356 of file qwt_plot_picker.cpp.

void QwtPlotPicker::move ( const QPoint & pos ) [protected, virtual]

Move the last point of the selection

Parameters:

pos	New position

See also:: isActive, begin(), end(), append()

Note:: The moved(const QPoint &), moved(const QDoublePoint &) signals are emitted.

Reimplemented from QwtPicker.

Definition at line 255 of file qwt_plot_picker.cpp.

void QwtPlotPicker::moved ( const QPointF & pos ) [signal]

A signal emitted whenever the last appended point of the selection has been moved.

Parameters:

pos	Position of the moved last point of the selection.

See also:: move(), appended()

QwtPlot * QwtPlotPicker::plot ( )

Returns:: Plot widget, containing the observed plot canvas

Definition at line 116 of file qwt_plot_picker.cpp.

const QwtPlot * QwtPlotPicker::plot ( ) const

Returns:: Plot widget, containing the observed plot canvas

Definition at line 126 of file qwt_plot_picker.cpp.

QRectF QwtPlotPicker::scaleRect ( ) const [protected]

Returns:: Normalized bounding rectangle of the axes

See also:: QwtPlot::autoReplot(), QwtPlot::replot().

Definition at line 139 of file qwt_plot_picker.cpp.

void QwtPlotPicker::selected ( const QPointF & pos ) [signal]

A signal emitted in case of QwtPickerMachine::PointSelection.

Parameters:

pos	Selected point

void QwtPlotPicker::selected ( const QRectF & rect ) [signal]

A signal emitted in case of QwtPickerMachine::RectSelection.

Parameters:

rect	Selected rectangle

void QwtPlotPicker::selected ( const QVector< QPointF > & pa ) [signal]

A signal emitting the selected points, at the end of a selection.

Parameters:

pa	Selected points

void QwtPlotPicker::setAxis	(	int	xAxis,
		int	yAxis
	)		`[virtual]`

Set the x and y axes of the picker

Parameters:

xAxis	X axis
yAxis	Y axis

Reimplemented in QwtPlotZoomer.

Definition at line 162 of file qwt_plot_picker.cpp.

QwtText QwtPlotPicker::trackerText ( const QPoint & pos ) const [protected, virtual]

Translate a pixel position into a position string

Parameters:

pos	Position in pixel coordinates

Returns:: Position string

Reimplemented from QwtPicker.

Definition at line 193 of file qwt_plot_picker.cpp.

QwtText QwtPlotPicker::trackerTextF ( const QPointF & pos ) const [protected, virtual]

Translate a position into a position string.

In case of HLineRubberBand the label is the value of the y position, in case of VLineRubberBand the value of the x position. Otherwise the label contains x and y position separated by a ',' .

The format for the double to string conversion is "%.4f".

Parameters:

pos Position

Returns:: Position string

Definition at line 213 of file qwt_plot_picker.cpp.

QRect QwtPlotPicker::transform ( const QRectF & rect ) const [protected]

Translate a rectangle from plot into pixel coordinates

Returns:: Rectangle in pixel coordinates

See also:: invTransform()

Definition at line 343 of file qwt_plot_picker.cpp.

QPoint QwtPlotPicker::transform ( const QPointF & pos ) const [protected]

Translate a point from plot into pixel coordinates

Returns:: Point in pixel coordinates

See also:: invTransform()

Definition at line 372 of file qwt_plot_picker.cpp.

int QwtPlotPicker::xAxis ( ) const

Return x axis.

Definition at line 176 of file qwt_plot_picker.cpp.

int QwtPlotPicker::yAxis ( ) const

Return y axis.

Definition at line 182 of file qwt_plot_picker.cpp.

Member Data Documentation

int QwtPlotPicker::d_xAxis [private]

Definition at line 107 of file qwt_plot_picker.h.

int QwtPlotPicker::d_yAxis [private]

Definition at line 108 of file qwt_plot_picker.h.

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

Signals

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation