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QwtPolarPicker(3) Qwt User's Guide QwtPolarPicker(3)

NAME

QwtPolarPicker - QwtPolarPicker provides selections on a plot canvas.

SYNOPSIS

#include <qwt_polar_picker.h>

Inherits QwtPicker.

Signals


void selected (const QwtPointPolar &pos)
void selected (const QVector< QwtPointPolar > &points)
void appended (const QwtPointPolar &pos)
void moved (const QwtPointPolar &pos)

Public Member Functions


QwtPolarPicker (QwtPolarCanvas *)
Create a polar plot picker. virtual ~QwtPolarPicker ()
Destructor. QwtPolarPicker (RubberBand rubberBand, DisplayMode trackerMode, QwtPolarCanvas *)
QwtPolarPlot * plot ()
const QwtPolarPlot * plot () const
QwtPolarCanvas * canvas ()
const QwtPolarCanvas * canvas () const
virtual QRect pickRect () const

Protected Member Functions


QwtPointPolar invTransform (const QPoint &) const
virtual QwtText trackerText (const QPoint &) const override
virtual QwtText trackerTextPolar (const QwtPointPolar &) const
Translate a position into a position string. virtual void move (const QPoint &) override
virtual void append (const QPoint &) override
virtual bool end (bool ok=true) override

Private Member Functions


virtual QPainterPath pickArea () const override

Additional Inherited Members

Detailed Description

QwtPolarPicker provides selections on a plot canvas.

QwtPolarPicker is a QwtPicker tailored for selections on a polar plot canvas.

Definition at line 28 of file qwt_polar_picker.h.

Constructor & Destructor Documentation

QwtPolarPicker::QwtPolarPicker (QwtPolarCanvas * canvas) [explicit]

Create a polar plot picker.

Parameters

canvas Plot canvas to observe, also the parent object

Definition at line 25 of file qwt_polar_picker.cpp.

QwtPolarPicker::QwtPolarPicker (RubberBand rubberBand, DisplayMode trackerMode, QwtPolarCanvas * canvas) [explicit]

Create a plot picker

Parameters

rubberBand Rubberband style
trackerMode Tracker mode
canvas Plot canvas to observe, also the parent object

See also

QwtPicker, QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(), QwtPicker::setTrackerMode

QwtPolarPlot::autoReplot(), QwtPolarPlot::replot(), scaleRect()

Definition at line 43 of file qwt_polar_picker.cpp.

Member Function Documentation

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

Append a point to the selection and update rubberband 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 128 of file qwt_polar_picker.cpp.

void QwtPolarPicker::appended (const QwtPointPolar & 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()

QwtPolarCanvas * QwtPolarPicker::canvas ()

Returns

Observed plot canvas

Definition at line 56 of file qwt_polar_picker.cpp.

const QwtPolarCanvas * QwtPolarPicker::canvas () const

Returns

Observed plot canvas

Definition at line 62 of file qwt_polar_picker.cpp.

bool QwtPolarPicker::end (bool ok = true) [override], [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 is accepted, false otherwise

Reimplemented from QwtPicker.

Definition at line 157 of file qwt_polar_picker.cpp.

QwtPointPolar QwtPolarPicker::invTransform (const QPoint & pos) const [protected]

Translate a point from widget into plot coordinates

Parameters

pos Point in widget coordinates of the plot canvas

Returns

Point in plot coordinates

See also

transform(), canvas()

Definition at line 208 of file qwt_polar_picker.cpp.

void QwtPolarPicker::move (const QPoint & pos) [override], [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 143 of file qwt_polar_picker.cpp.

void QwtPolarPicker::moved (const QwtPointPolar & 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()

QPainterPath QwtPolarPicker::pickArea () const [override], [private], [virtual]

Find the area of the observed widget, where selection might happen.

Returns

parentWidget()->contentsRect()

Reimplemented from QwtPicker.

Definition at line 229 of file qwt_polar_picker.cpp.

QRect QwtPolarPicker::pickRect () const [virtual]

Returns

Bounding rectangle of the region, where picking is supported.

Definition at line 221 of file qwt_polar_picker.cpp.

QwtPolarPlot * QwtPolarPicker::plot ()

Returns

Plot widget, containing the observed plot canvas

Definition at line 68 of file qwt_polar_picker.cpp.

const QwtPolarPlot * QwtPolarPicker::plot () const

Returns

Plot widget, containing the observed plot canvas

Definition at line 78 of file qwt_polar_picker.cpp.

void QwtPolarPicker::selected (const QVector< QwtPointPolar > & points) [signal]

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

Parameters

points Selected points

void QwtPolarPicker::selected (const QwtPointPolar & pos) [signal]

A signal emitted in case of selectionFlags() & PointSelection.

Parameters

pos Selected point

QwtText QwtPolarPicker::trackerText (const QPoint & pos) const [override], [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 93 of file qwt_polar_picker.cpp.

QwtText QwtPolarPicker::trackerTextPolar (const QwtPointPolar & 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 111 of file qwt_polar_picker.cpp.

Author

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Sun Jul 18 2021 Version 6.2.0