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

QwtPlotPicker - QwtPlotPicker provides selections on a plot canvas.

#include <qwt_plot_picker.h>

Inherits QwtPicker.

Inherited by QwtPlotZoomer.


void selected (const QPointF &pos)
void selected (const QRectF &rect)
void selected (const QVector< QPointF > &pa)
void appended (const QPointF &pos)
void moved (const QPointF &pos)


QwtPlotPicker (QWidget *canvas)
Create a plot picker. virtual ~QwtPlotPicker ()
Destructor. QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget *)
QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
virtual void setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId)
QwtAxisId xAxis () const
Return x axis. QwtAxisId yAxis () const
Return y axis. QwtPlot * plot ()
const QwtPlot * plot () const
QWidget * canvas ()
const QWidget * canvas () const


QRectF scaleRect () const
QRectF invTransform (const QRect &) const
QRect transform (const QRectF &) const
QPointF invTransform (const QPoint &) const
QPoint transform (const QPointF &) const
virtual QwtText trackerText (const QPoint &) const override
virtual QwtText trackerTextF (const QPointF &) 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

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 33 of file qwt_plot_picker.h.

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 QwtAxis::XBottom. If both or no y-axis are enabled, it is set to QwtAxis::YLeft.

Parameters

canvas Plot canvas to observe, also the parent object

See also

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

Definition at line 43 of file qwt_plot_picker.cpp.

Create a plot picker

Parameters

xAxisId X axis of the picker
yAxisId Y axis of the picker
canvas Plot canvas to observe, also the parent object

See also

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

Definition at line 76 of file qwt_plot_picker.cpp.

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 98 of file qwt_plot_picker.cpp.

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 251 of file qwt_plot_picker.cpp.

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

Parameters

pos Position of the appended point.

See also

append(). moved()

Returns

Observed plot canvas

Definition at line 114 of file qwt_plot_picker.cpp.

Returns

Observed plot canvas

Definition at line 120 of file qwt_plot_picker.cpp.

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 280 of file qwt_plot_picker.cpp.

Translate a point from pixel into plot coordinates

Returns

Point in plot coordinates

See also

transform()

Definition at line 367 of file qwt_plot_picker.cpp.

Translate a rectangle from pixel into plot coordinates

Returns

Rectangle in plot coordinates

See also

transform()

Definition at line 341 of file qwt_plot_picker.cpp.

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 266 of file qwt_plot_picker.cpp.

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 126 of file qwt_plot_picker.cpp.

Returns

Plot widget, containing the observed plot canvas

Definition at line 136 of file qwt_plot_picker.cpp.

Returns

Normalized bounding rectangle of the axes

See also

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

Definition at line 149 of file qwt_plot_picker.cpp.

A signal emitted in case of QwtPickerMachine::PointSelection.

Parameters

pos Selected point

A signal emitted in case of QwtPickerMachine::RectSelection.

Parameters

rect Selected rectangle

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

Parameters

pa Selected points

Set the x and y axes of the picker

Parameters

xAxisId X axis
yAxisId Y axis

Reimplemented in QwtPlotZoomer.

Definition at line 172 of file qwt_plot_picker.cpp.

QwtText QwtPlotPicker::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 203 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 223 of file qwt_plot_picker.cpp.

Translate a point from plot into pixel coordinates

Returns

Point in pixel coordinates

See also

invTransform()

Definition at line 383 of file qwt_plot_picker.cpp.

Translate a rectangle from plot into pixel coordinates

Returns

Rectangle in pixel coordinates

See also

invTransform()

Definition at line 354 of file qwt_plot_picker.cpp.

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Sun Jul 18 2021 Version 6.2.0