.TH "QwtPlotPicker" 3 "Wed Jan 2 2019" "Version 6.1.4" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtPlotPicker \- \fBQwtPlotPicker\fP provides selections on a plot canvas\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_plot_picker\&.h>\fP
.PP
Inherits \fBQwtPicker\fP\&.
.PP
Inherited by \fBQwtPlotZoomer\fP\&.
.SS "Signals"

.in +1c
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.RI "void \fBselected\fP (const QPointF &pos)"
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.RI "void \fBselected\fP (const QRectF &rect)"
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.RI "void \fBselected\fP (const QVector< QPointF > &pa)"
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.RI "void \fBappended\fP (const QPointF &pos)"
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.RI "void \fBmoved\fP (const QPointF &pos)"
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.SS "Public Member Functions"

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.RI "\fBQwtPlotPicker\fP (QWidget *\fBcanvas\fP)"
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.RI "Create a plot picker\&. "
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.RI "virtual \fB~QwtPlotPicker\fP ()"
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.RI "Destructor\&. "
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.RI "\fBQwtPlotPicker\fP (int \fBxAxis\fP, int \fByAxis\fP, QWidget *)"
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.RI "\fBQwtPlotPicker\fP (int \fBxAxis\fP, int \fByAxis\fP, \fBRubberBand\fP \fBrubberBand\fP, \fBDisplayMode\fP \fBtrackerMode\fP, QWidget *)"
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.RI "virtual void \fBsetAxis\fP (int \fBxAxis\fP, int \fByAxis\fP)"
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.RI "int \fBxAxis\fP () const"
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.RI "Return x axis\&. "
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.RI "int \fByAxis\fP () const"
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.RI "Return y axis\&. "
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.RI "\fBQwtPlot\fP * \fBplot\fP ()"
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.RI "const \fBQwtPlot\fP * \fBplot\fP () const"
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.RI "QWidget * \fBcanvas\fP ()"
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.RI "const QWidget * \fBcanvas\fP () const"
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.SS "Protected Member Functions"

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.RI "QRectF \fBscaleRect\fP () const"
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.RI "QRectF \fBinvTransform\fP (const QRect &) const"
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.RI "QRect \fBtransform\fP (const QRectF &) const"
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.RI "QPointF \fBinvTransform\fP (const QPoint &) const"
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.RI "QPoint \fBtransform\fP (const QPointF &) const"
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.RI "virtual \fBQwtText\fP \fBtrackerText\fP (const QPoint &) const"
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.RI "virtual \fBQwtText\fP \fBtrackerTextF\fP (const QPointF &) const"
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.RI "Translate a position into a position string\&. "
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.RI "virtual void \fBmove\fP (const QPoint &)"
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.RI "virtual void \fBappend\fP (const QPoint &)"
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.RI "virtual bool \fBend\fP (bool ok=true)"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
\fBQwtPlotPicker\fP provides selections on a plot canvas\&. 

\fBQwtPlotPicker\fP is a \fBQwtPicker\fP 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\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtPlotPicker::QwtPlotPicker (QWidget * canvas)\fC [explicit]\fP"

.PP
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 \fBQwtPlot::xBottom\fP\&. If both or no y-axis are enabled, it is set to \fBQwtPlot::yLeft\fP\&.
.PP
\fBParameters:\fP
.RS 4
\fIcanvas\fP Plot canvas to observe, also the parent object
.RE
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\fBSee also:\fP
.RS 4
\fBQwtPlot::autoReplot()\fP, \fBQwtPlot::replot()\fP, \fBscaleRect()\fP 
.RE
.PP

.SS "QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, QWidget * canvas)\fC [explicit]\fP"
Create a plot picker
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\fBParameters:\fP
.RS 4
\fIxAxis\fP Set the x axis of the picker 
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\fIyAxis\fP Set the y axis of the picker 
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\fIcanvas\fP Plot canvas to observe, also the parent object
.RE
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\fBSee also:\fP
.RS 4
\fBQwtPlot::autoReplot()\fP, \fBQwtPlot::replot()\fP, \fBscaleRect()\fP 
.RE
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.SS "QwtPlotPicker::QwtPlotPicker (int xAxis, int yAxis, \fBRubberBand\fP rubberBand, \fBDisplayMode\fP trackerMode, QWidget * canvas)\fC [explicit]\fP"
Create a plot picker
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\fBParameters:\fP
.RS 4
\fIxAxis\fP X axis of the picker 
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\fIyAxis\fP Y axis of the picker 
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\fIrubberBand\fP Rubber band style 
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\fItrackerMode\fP Tracker mode 
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\fIcanvas\fP Plot canvas to observe, also the parent object
.RE
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\fBSee also:\fP
.RS 4
\fBQwtPicker\fP, QwtPicker::setSelectionFlags(), \fBQwtPicker::setRubberBand()\fP, \fBQwtPicker::setTrackerMode\fP
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\fBQwtPlot::autoReplot()\fP, \fBQwtPlot::replot()\fP, \fBscaleRect()\fP 
.RE
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.SH "Member Function Documentation"
.PP 
.SS "void QwtPlotPicker::append (const QPoint & pos)\fC [protected]\fP, \fC [virtual]\fP"
Append a point to the selection and update rubber band and tracker\&.
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\fBParameters:\fP
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\fIpos\fP Additional point 
.RE
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\fBSee also:\fP
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\fBisActive\fP, \fBbegin()\fP, \fBend()\fP, \fBmove()\fP, \fBappended()\fP
.RE
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\fBNote:\fP
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The \fBappended(const QPoint &)\fP, appended(const QDoublePoint &) signals are emitted\&. 
.RE
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.PP
Reimplemented from \fBQwtPicker\fP\&.
.SS "void QwtPlotPicker::appended (const QPointF & pos)\fC [signal]\fP"
A signal emitted when a point has been appended to the selection
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\fBParameters:\fP
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\fIpos\fP Position of the appended point\&. 
.RE
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\fBSee also:\fP
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\fBappend()\fP\&. \fBmoved()\fP 
.RE
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.SS "QWidget * QwtPlotPicker::canvas ()"

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\fBReturns:\fP
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Observed plot canvas 
.RE
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.SS "const QWidget * QwtPlotPicker::canvas () const"

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\fBReturns:\fP
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Observed plot canvas 
.RE
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.SS "bool QwtPlotPicker::end (bool ok = \fCtrue\fP)\fC [protected]\fP, \fC [virtual]\fP"
Close a selection setting the state to inactive\&.
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\fBParameters:\fP
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\fIok\fP If true, complete the selection and emit selected signals otherwise discard the selection\&. 
.RE
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\fBReturns:\fP
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True if the selection has been accepted, false otherwise 
.RE
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.PP
Reimplemented from \fBQwtPicker\fP\&.
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Reimplemented in \fBQwtPlotZoomer\fP\&.
.SS "QRectF QwtPlotPicker::invTransform (const QRect & rect) const\fC [protected]\fP"
Translate a rectangle from pixel into plot coordinates
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\fBReturns:\fP
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Rectangle in plot coordinates 
.RE
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\fBSee also:\fP
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\fBtransform()\fP 
.RE
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.SS "QPointF QwtPlotPicker::invTransform (const QPoint & pos) const\fC [protected]\fP"
Translate a point from pixel into plot coordinates 
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\fBReturns:\fP
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Point in plot coordinates 
.RE
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\fBSee also:\fP
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\fBtransform()\fP 
.RE
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.SS "void QwtPlotPicker::move (const QPoint & pos)\fC [protected]\fP, \fC [virtual]\fP"
Move the last point of the selection
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\fBParameters:\fP
.RS 4
\fIpos\fP New position 
.RE
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\fBSee also:\fP
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\fBisActive\fP, \fBbegin()\fP, \fBend()\fP, \fBappend()\fP
.RE
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\fBNote:\fP
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The \fBmoved(const QPoint &)\fP, moved(const QDoublePoint &) signals are emitted\&. 
.RE
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.PP
Reimplemented from \fBQwtPicker\fP\&.
.SS "void QwtPlotPicker::moved (const QPointF & pos)\fC [signal]\fP"
A signal emitted whenever the last appended point of the selection has been moved\&.
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\fBParameters:\fP
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\fIpos\fP Position of the moved last point of the selection\&. 
.RE
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\fBSee also:\fP
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\fBmove()\fP, \fBappended()\fP 
.RE
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.SS "\fBQwtPlot\fP * QwtPlotPicker::plot ()"

.PP
\fBReturns:\fP
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Plot widget, containing the observed plot canvas 
.RE
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.SS "const \fBQwtPlot\fP * QwtPlotPicker::plot () const"

.PP
\fBReturns:\fP
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Plot widget, containing the observed plot canvas 
.RE
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.SS "QRectF QwtPlotPicker::scaleRect () const\fC [protected]\fP"

.PP
\fBReturns:\fP
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Normalized bounding rectangle of the axes 
.RE
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\fBSee also:\fP
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\fBQwtPlot::autoReplot()\fP, \fBQwtPlot::replot()\fP\&. 
.RE
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.SS "void QwtPlotPicker::selected (const QPointF & pos)\fC [signal]\fP"
A signal emitted in case of \fBQwtPickerMachine::PointSelection\fP\&. 
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\fBParameters:\fP
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\fIpos\fP Selected point 
.RE
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.SS "void QwtPlotPicker::selected (const QRectF & rect)\fC [signal]\fP"
A signal emitted in case of \fBQwtPickerMachine::RectSelection\fP\&. 
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\fBParameters:\fP
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\fIrect\fP Selected rectangle 
.RE
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.SS "void QwtPlotPicker::selected (const QVector< QPointF > & pa)\fC [signal]\fP"
A signal emitting the selected points, at the end of a selection\&.
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\fBParameters:\fP
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\fIpa\fP Selected points 
.RE
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.SS "void QwtPlotPicker::setAxis (int xAxis, int yAxis)\fC [virtual]\fP"
Set the x and y axes of the picker
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\fBParameters:\fP
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\fIxAxis\fP X axis 
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\fIyAxis\fP Y axis 
.RE
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.PP
Reimplemented in \fBQwtPlotZoomer\fP\&.
.SS "\fBQwtText\fP QwtPlotPicker::trackerText (const QPoint & pos) const\fC [protected]\fP, \fC [virtual]\fP"
Translate a pixel position into a position string
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\fBParameters:\fP
.RS 4
\fIpos\fP Position in pixel coordinates 
.RE
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\fBReturns:\fP
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Position string 
.RE
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.PP
Reimplemented from \fBQwtPicker\fP\&.
.SS "\fBQwtText\fP QwtPlotPicker::trackerTextF (const QPointF & pos) const\fC [protected]\fP, \fC [virtual]\fP"

.PP
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 ',' \&.
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The format for the double to string conversion is '%\&.4f'\&.
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\fBParameters:\fP
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\fIpos\fP Position 
.RE
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\fBReturns:\fP
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Position string 
.RE
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.SS "QRect QwtPlotPicker::transform (const QRectF & rect) const\fC [protected]\fP"
Translate a rectangle from plot into pixel coordinates 
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\fBReturns:\fP
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Rectangle in pixel coordinates 
.RE
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\fBSee also:\fP
.RS 4
\fBinvTransform()\fP 
.RE
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.SS "QPoint QwtPlotPicker::transform (const QPointF & pos) const\fC [protected]\fP"
Translate a point from plot into pixel coordinates 
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\fBReturns:\fP
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Point in pixel coordinates 
.RE
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\fBSee also:\fP
.RS 4
\fBinvTransform()\fP 
.RE
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.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.