QwtPlotPicker (3)

#include <qwt_plot_picker.h>

Inherits QwtPicker.

Inherited by QwtPlotZoomer.

Signals

void appended (const QwtDoublePoint &pos)

void moved (const QwtDoublePoint &pos)

void selected (const QwtDoublePoint &pos)

void selected (const QwtDoubleRect &rect)

void selected (const QwtArray< QwtDoublePoint > &pa)

Public Member Functions

QwtPlotPicker (QwtPlotCanvas *)

QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas *)

QwtPlotPicker (int xAxis, int yAxis, int selectionFlags, RubberBand rubberBand, DisplayMode trackerMode, QwtPlotCanvas *)

virtual ~QwtPlotPicker ()

QwtPlotCanvas * canvas ()

const QwtPlotCanvas * canvas () const

QwtPlot * plot ()

const QwtPlot * plot () const

virtual void setAxis (int xAxis, int yAxis)

int xAxis () const

int yAxis () const

Protected Member Functions

virtual void append (const QPoint &)

virtual bool end (bool ok=true)

QwtDoubleRect invTransform (const QRect &) const

QwtDoublePoint invTransform (const QPoint &) const

virtual void move (const QPoint &)

QwtDoubleRect scaleRect () const

virtual QwtText trackerText (const QPoint &) const

virtual QwtText trackerText (const QwtDoublePoint &) const

QRect transform (const QwtDoubleRect &) const

QPoint transform (const QwtDoublePoint &) const

Additional Inherited Members

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 coodinate system.

QwtPlotPicker::QwtPlotPicker (\fBQwtPlotCanvas\fP *canvas)\fC [explicit]\fP

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(), QwtPlotPicker::scaleRect()

QwtPlotPicker::QwtPlotPicker (intxAxis, intyAxis, \fBQwtPlotCanvas\fP *canvas)\fC [explicit]\fP

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(), QwtPlotPicker::scaleRect()

QwtPlotPicker::QwtPlotPicker (intxAxis, intyAxis, intselectionFlags, \fBRubberBand\fPrubberBand, \fBDisplayMode\fPtrackerMode, \fBQwtPlotCanvas\fP *canvas)\fC [explicit]\fP

Create a plot picker

Parameters:

xAxis X axis of the picker

yAxis Y axis of the picker

selectionFlags Or'd value of SelectionType, RectSelectionType and SelectionMode

rubberBand Rubberband 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(), QwtPlotPicker::scaleRect()

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

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.

void QwtPlotPicker::appended (const QwtDoublePoint &pos)\fC [signal]\fP

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

Parameters:

pos Position of the appended point.

See also:

append(). moved()

bool QwtPlotPicker::end (boolok = \fCtrue\fP)\fC [protected]\fP, \fC [virtual]\fP

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.

Reimplemented in QwtPlotZoomer.

QwtDoubleRect QwtPlotPicker::invTransform (const QRect &rect) const\fC [protected]\fP

Translate a rectangle from pixel into plot coordinates

Returns:

Rectangle in plot coordinates

See also:

QwtPlotPicker::transform()

QwtDoublePoint QwtPlotPicker::invTransform (const QPoint &pos) const\fC [protected]\fP

Translate a point from pixel into plot coordinates

Returns:

Point in plot coordinates

See also:

QwtPlotPicker::transform()

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

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.

void QwtPlotPicker::moved (const QwtDoublePoint &pos)\fC [signal]\fP

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()

QwtDoubleRect QwtPlotPicker::scaleRect () const\fC [protected]\fP

Return normalized bounding rect of the axes

See also:

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

void QwtPlotPicker::selected (const QwtDoublePoint &pos)\fC [signal]\fP

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

Parameters:

pos Selected point

void QwtPlotPicker::selected (const QwtDoubleRect &rect)\fC [signal]\fP

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

Parameters:

rect Selected rectangle

void QwtPlotPicker::selected (const QwtArray< QwtDoublePoint > &pa)\fC [signal]\fP

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

Parameters:

pa Selected points

void QwtPlotPicker::setAxis (intxAxis, intyAxis)\fC [virtual]\fP

Set the x and y axes of the picker

Parameters:

xAxis X axis

yAxis Y axis

Reimplemented in QwtPlotZoomer.

\fBQwtText\fP QwtPlotPicker::trackerText (const QPoint &pos) const\fC [protected]\fP, \fC [virtual]\fP

Translate a pixel position into a position string

Parameters:

pos Position in pixel coordinates

Returns:

Position string

Reimplemented from QwtPicker.

\fBQwtText\fP QwtPlotPicker::trackerText (const QwtDoublePoint &pos) const\fC [protected]\fP, \fC [virtual]\fP

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

QRect QwtPlotPicker::transform (const QwtDoubleRect &rect) const\fC [protected]\fP

Translate a rectangle from plot into pixel coordinates

Returns:

Rectangle in pixel coordinates

See also:

QwtPlotPicker::invTransform()

QPoint QwtPlotPicker::transform (const QwtDoublePoint &pos) const\fC [protected]\fP

Translate a point from plot into pixel coordinates

Returns:

Point in pixel coordinates

See also:

QwtPlotPicker::invTransform()

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