1379 lines
32 KiB
Groff
1379 lines
32 KiB
Groff
.TH "QwtPicker" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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QwtPicker \- \fBQwtPicker\fP provides selections on a widget\&.
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.SH SYNOPSIS
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.br
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.PP
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.PP
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\fC#include <qwt_picker\&.h>\fP
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.PP
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Inherits QObject, and \fBQwtEventPattern\fP\&.
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.PP
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Inherited by \fBQwtPlotPicker\fP, and \fBQwtPolarPicker\fP\&.
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.SS "Public Types"
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.in +1c
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.ti -1c
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.RI "enum \fBRubberBand\fP { \fBNoRubberBand\fP = 0, \fBHLineRubberBand\fP, \fBVLineRubberBand\fP, \fBCrossRubberBand\fP, \fBRectRubberBand\fP, \fBEllipseRubberBand\fP, \fBPolygonRubberBand\fP, \fBUserRubberBand\fP = 100 }"
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.br
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.ti -1c
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.RI "enum \fBDisplayMode\fP { \fBAlwaysOff\fP, \fBAlwaysOn\fP, \fBActiveOnly\fP }"
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.br
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.RI "Display mode\&. "
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.ti -1c
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.RI "enum \fBResizeMode\fP { \fBStretch\fP, \fBKeepSize\fP }"
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.br
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.in -1c
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.SS "Public Slots"
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.in +1c
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.ti -1c
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.RI "void \fBsetEnabled\fP (bool)"
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.br
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.RI "En/disable the picker\&. "
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.in -1c
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.SS "Signals"
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.in +1c
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.ti -1c
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.RI "void \fBactivated\fP (bool on)"
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.br
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.ti -1c
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.RI "void \fBselected\fP (const QPolygon &polygon)"
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.br
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.ti -1c
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.RI "void \fBappended\fP (const QPoint &pos)"
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.br
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.ti -1c
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.RI "void \fBmoved\fP (const QPoint &pos)"
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.br
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.ti -1c
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.RI "void \fBremoved\fP (const QPoint &pos)"
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.br
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.ti -1c
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.RI "void \fBchanged\fP (const QPolygon &\fBselection\fP)"
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.br
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.in -1c
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.SS "Public Member Functions"
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.in +1c
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.ti -1c
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.RI "\fBQwtPicker\fP (QWidget *parent)"
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.br
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.ti -1c
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.RI "\fBQwtPicker\fP (\fBRubberBand\fP \fBrubberBand\fP, \fBDisplayMode\fP \fBtrackerMode\fP, QWidget *)"
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.br
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.ti -1c
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.RI "virtual \fB~QwtPicker\fP ()"
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.br
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.RI "Destructor\&. "
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.ti -1c
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.RI "void \fBsetStateMachine\fP (\fBQwtPickerMachine\fP *)"
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.br
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.ti -1c
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.RI "const \fBQwtPickerMachine\fP * \fBstateMachine\fP () const"
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.br
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.ti -1c
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.RI "\fBQwtPickerMachine\fP * \fBstateMachine\fP ()"
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.br
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.ti -1c
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.RI "void \fBsetRubberBand\fP (\fBRubberBand\fP)"
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.br
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.ti -1c
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.RI "\fBRubberBand\fP \fBrubberBand\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetTrackerMode\fP (\fBDisplayMode\fP)"
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.br
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.RI "Set the display mode of the tracker\&. "
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.ti -1c
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.RI "\fBDisplayMode\fP \fBtrackerMode\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetResizeMode\fP (\fBResizeMode\fP)"
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.br
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.RI "Set the resize mode\&. "
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.ti -1c
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.RI "\fBResizeMode\fP \fBresizeMode\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetRubberBandPen\fP (const QPen &)"
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.br
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.ti -1c
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.RI "QPen \fBrubberBandPen\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetTrackerPen\fP (const QPen &)"
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.br
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.ti -1c
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.RI "QPen \fBtrackerPen\fP () const"
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.br
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.ti -1c
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.RI "void \fBsetTrackerFont\fP (const QFont &)"
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.br
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.ti -1c
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.RI "QFont \fBtrackerFont\fP () const"
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.br
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.ti -1c
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.RI "bool \fBisEnabled\fP () const"
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.br
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.ti -1c
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.RI "bool \fBisActive\fP () const"
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.br
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.ti -1c
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.RI "virtual bool \fBeventFilter\fP (QObject *, QEvent *) override"
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.br
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.RI "Event filter\&. "
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.ti -1c
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.RI "QWidget * \fBparentWidget\fP ()"
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.br
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.RI "Return the parent widget, where the selection happens\&. "
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.ti -1c
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.RI "const QWidget * \fBparentWidget\fP () const"
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.br
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.RI "Return the parent widget, where the selection happens\&. "
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.ti -1c
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.RI "virtual QPainterPath \fBpickArea\fP () const"
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.br
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.ti -1c
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.RI "virtual void \fBdrawRubberBand\fP (QPainter *) const"
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.br
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.ti -1c
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.RI "virtual void \fBdrawTracker\fP (QPainter *) const"
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.br
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.ti -1c
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.RI "virtual QRegion \fBtrackerMask\fP () const"
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.br
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.ti -1c
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.RI "virtual QRegion \fBrubberBandMask\fP () const"
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.br
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.ti -1c
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.RI "virtual \fBQwtText\fP \fBtrackerText\fP (const QPoint &pos) const"
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.br
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.RI "Return the label for a position\&. "
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.ti -1c
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.RI "QPoint \fBtrackerPosition\fP () const"
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.br
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.ti -1c
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.RI "virtual QRect \fBtrackerRect\fP (const QFont &) const"
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.br
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.ti -1c
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.RI "QPolygon \fBselection\fP () const"
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.br
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.in -1c
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.SS "Protected Member Functions"
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.in +1c
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.ti -1c
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.RI "virtual QPolygon \fBadjustedPoints\fP (const QPolygon &) const"
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.br
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.RI "Map the \fBpickedPoints()\fP into a \fBselection()\fP "
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.ti -1c
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.RI "virtual void \fBtransition\fP (const QEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBbegin\fP ()"
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.br
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.ti -1c
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.RI "virtual void \fBappend\fP (const QPoint &)"
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.br
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.ti -1c
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.RI "virtual void \fBmove\fP (const QPoint &)"
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.br
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.ti -1c
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.RI "virtual void \fBremove\fP ()"
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.br
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.ti -1c
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.RI "virtual bool \fBend\fP (bool ok=true)"
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.br
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.RI "Close a selection setting the state to inactive\&. "
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.ti -1c
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.RI "virtual bool \fBaccept\fP (QPolygon &) const"
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.br
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.RI "Validate and fix up the selection\&. "
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.ti -1c
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.RI "virtual void \fBreset\fP ()"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetMousePressEvent\fP (QMouseEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetMouseReleaseEvent\fP (QMouseEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetMouseDoubleClickEvent\fP (QMouseEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetMouseMoveEvent\fP (QMouseEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetWheelEvent\fP (QWheelEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetKeyPressEvent\fP (QKeyEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetKeyReleaseEvent\fP (QKeyEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetEnterEvent\fP (QEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBwidgetLeaveEvent\fP (QEvent *)"
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.br
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.ti -1c
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.RI "virtual void \fBstretchSelection\fP (const QSize &oldSize, const QSize &newSize)"
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.br
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.ti -1c
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.RI "virtual void \fBupdateDisplay\fP ()"
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.br
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.RI "Update the state of rubber band and tracker label\&. "
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.ti -1c
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.RI "const \fBQwtWidgetOverlay\fP * \fBrubberBandOverlay\fP () const"
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.br
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.ti -1c
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.RI "const \fBQwtWidgetOverlay\fP * \fBtrackerOverlay\fP () const"
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.br
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.ti -1c
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.RI "const QPolygon & \fBpickedPoints\fP () const"
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.br
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.in -1c
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.SH "Detailed Description"
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.PP
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\fBQwtPicker\fP provides selections on a widget\&.
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\fBQwtPicker\fP filters all enter, leave, mouse and keyboard events of a widget and translates them into an array of selected points\&.
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.PP
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The way how the points are collected depends on type of state machine that is connected to the picker\&. Qwt offers a couple of predefined state machines for selecting:
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.PP
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.IP "\(bu" 2
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Nothing
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.br
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\fBQwtPickerTrackerMachine\fP
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.IP "\(bu" 2
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Single points
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.br
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\fBQwtPickerClickPointMachine\fP, \fBQwtPickerDragPointMachine\fP
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.IP "\(bu" 2
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Rectangles
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.br
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\fBQwtPickerClickRectMachine\fP, \fBQwtPickerDragRectMachine\fP
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.IP "\(bu" 2
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Polygons
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.br
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\fBQwtPickerPolygonMachine\fP
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.PP
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.PP
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While these state machines cover the most common ways to collect points it is also possible to implement individual machines as well\&.
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.PP
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\fBQwtPicker\fP translates the picked points into a selection using the \fBadjustedPoints()\fP method\&. \fBadjustedPoints()\fP is intended to be reimplemented to fix up the selection according to application specific requirements\&. (F\&.e\&. when an application accepts rectangles of a fixed aspect ratio only\&.)
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.PP
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Optionally \fBQwtPicker\fP support the process of collecting points by a rubber band and tracker displaying a text for the current mouse position\&.
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.PP
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\fBExample\fP
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.RS 4
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.PP
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.nf
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#include <qwt_picker\&.h>
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#include <qwt_picker_machine\&.h>
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QwtPicker *picker = new QwtPicker(widget);
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picker->setStateMachine(new QwtPickerDragRectMachine);
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picker->setTrackerMode(QwtPicker::ActiveOnly);
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picker->setRubberBand(QwtPicker::RectRubberBand);
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.fi
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.PP
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.RE
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.PP
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The state machine triggers the following commands:
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.PP
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.IP "\(bu" 2
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\fBbegin()\fP
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.br
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Activate/Initialize the selection\&.
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.IP "\(bu" 2
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\fBappend()\fP
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.br
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Add a new point
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.IP "\(bu" 2
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\fBmove()\fP
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.br
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Change the position of the last point\&.
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.IP "\(bu" 2
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\fBremove()\fP
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.br
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Remove the last point\&.
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.IP "\(bu" 2
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\fBend()\fP
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.br
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Terminate the selection and call accept to validate the picked points\&.
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.PP
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.PP
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The picker is active (\fBisActive()\fP), between \fBbegin()\fP and \fBend()\fP\&. In active state the rubber band is displayed, and the tracker is visible in case of trackerMode is ActiveOnly or AlwaysOn\&.
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.PP
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The cursor can be moved using the arrow keys\&. All selections can be aborted using the abort key\&. (\fBQwtEventPattern::KeyPatternCode\fP)
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.PP
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\fBWarning\fP
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.RS 4
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In case of QWidget::NoFocus the focus policy of the observed widget is set to QWidget::WheelFocus and mouse tracking will be manipulated while the picker is active, or if \fBtrackerMode()\fP is AlwayOn\&.
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.RE
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.PP
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.PP
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Definition at line 103 of file qwt_picker\&.h\&.
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.SH "Member Enumeration Documentation"
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.PP
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.SS "enum \fBQwtPicker::DisplayMode\fP"
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.PP
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Display mode\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetTrackerMode()\fP, \fBtrackerMode()\fP, \fBisActive()\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIAlwaysOff \fP\fP
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Display never\&.
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.TP
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\fB\fIAlwaysOn \fP\fP
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Display always\&.
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.TP
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\fB\fIActiveOnly \fP\fP
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Display only when the selection is active\&.
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.PP
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Definition at line 161 of file qwt_picker\&.h\&.
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.SS "enum \fBQwtPicker::ResizeMode\fP"
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Controls what to do with the selected points of an active selection when the observed widget is resized\&.
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.PP
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The default value is \fBQwtPicker::Stretch\fP\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetResizeMode()\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fIStretch \fP\fP
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All points are scaled according to the new size,\&.
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.TP
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\fB\fIKeepSize \fP\fP
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All points remain unchanged\&.
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.PP
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Definition at line 181 of file qwt_picker\&.h\&.
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.SS "enum \fBQwtPicker::RubberBand\fP"
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Rubber band style
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.PP
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The default value is \fBQwtPicker::NoRubberBand\fP\&.
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetRubberBand()\fP, \fBrubberBand()\fP
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.RE
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.PP
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.PP
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\fBEnumerator\fP
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.in +1c
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.TP
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\fB\fINoRubberBand \fP\fP
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No rubberband\&.
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.TP
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\fB\fIHLineRubberBand \fP\fP
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A horizontal line ( only for \fBQwtPickerMachine::PointSelection\fP )
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.TP
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\fB\fIVLineRubberBand \fP\fP
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A vertical line ( only for \fBQwtPickerMachine::PointSelection\fP )
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.TP
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\fB\fICrossRubberBand \fP\fP
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A crosshair ( only for \fBQwtPickerMachine::PointSelection\fP )
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.TP
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\fB\fIRectRubberBand \fP\fP
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A rectangle ( only for \fBQwtPickerMachine::RectSelection\fP )
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.TP
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\fB\fIEllipseRubberBand \fP\fP
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An ellipse ( only for \fBQwtPickerMachine::RectSelection\fP )
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.TP
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\fB\fIPolygonRubberBand \fP\fP
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A polygon ( only for \fBQwtPickerMachine::PolygonSelection\fP )
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.TP
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\fB\fIUserRubberBand \fP\fP
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Values >= UserRubberBand can be used to define additional rubber bands\&.
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.PP
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Definition at line 127 of file qwt_picker\&.h\&.
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.SH "Constructor & Destructor Documentation"
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.PP
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.SS "QwtPicker::QwtPicker (QWidget * parent)\fC [explicit]\fP"
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Constructor
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.PP
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Creates an picker that is enabled, but without a state machine\&. rubber band and tracker are disabled\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIparent\fP Parent widget, that will be observed
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.RE
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.PP
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.PP
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Definition at line 168 of file qwt_picker\&.cpp\&.
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.SS "QwtPicker::QwtPicker (\fBRubberBand\fP rubberBand, \fBDisplayMode\fP trackerMode, QWidget * parent)\fC [explicit]\fP"
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Constructor
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.PP
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\fBParameters\fP
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.RS 4
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\fIrubberBand\fP Rubber band style
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.br
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\fItrackerMode\fP Tracker mode
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.br
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\fIparent\fP Parent widget, that will be observed
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.RE
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.PP
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.PP
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Definition at line 181 of file qwt_picker\&.cpp\&.
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.SH "Member Function Documentation"
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.PP
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.SS "bool QwtPicker::accept (QPolygon & selection) const\fC [protected]\fP, \fC [virtual]\fP"
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.PP
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Validate and fix up the selection\&. Accepts all selections unmodified
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.PP
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\fBParameters\fP
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.RS 4
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\fIselection\fP Selection to validate and fix up
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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true, when accepted, false otherwise
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.RE
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.PP
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.PP
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Reimplemented in \fBQwtPlotZoomer\fP\&.
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.PP
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Definition at line 1383 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::activated (bool on)\fC [signal]\fP"
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A signal indicating, when the picker has been activated\&. Together with \fBsetEnabled()\fP it can be used to implement selections with more than one picker\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIon\fP True, when the picker has been activated
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.RE
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.PP
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.SS "QPolygon QwtPicker::adjustedPoints (const QPolygon & points) const\fC [protected]\fP, \fC [virtual]\fP"
|
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|
.PP
|
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Map the \fBpickedPoints()\fP into a \fBselection()\fP \fBadjustedPoints()\fP maps the points, that have been collected on the \fBparentWidget()\fP into a \fBselection()\fP\&. The default implementation simply returns the points unmodified\&.
|
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.PP
|
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The reason, why a \fBselection()\fP differs from the picked points depends on the application requirements\&. F\&.e\&. :
|
|
.PP
|
|
.IP "\(bu" 2
|
|
A rectangular selection might need to have a specific aspect ratio only\&.
|
|
.IP "\(bu" 2
|
|
A selection could accept non intersecting polygons only\&.
|
|
.IP "\(bu" 2
|
|
\&.\&.\&.
|
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.PP
|
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.PP
|
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The example below is for a rectangular selection, where the first point is the center of the selected rectangle\&.
|
|
.PP
|
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\fBExample\fP
|
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.RS 4
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.PP
|
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.nf
|
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QPolygon MyPicker::adjustedPoints( const QPolygon &points ) const
|
|
{
|
|
QPolygon adjusted;
|
|
if ( points\&.size() == 2 )
|
|
{
|
|
const int width = qAbs( points[1]\&.x() - points[0]\&.x() );
|
|
const int height = qAbs( points[1]\&.y() - points[0]\&.y() );
|
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|
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QRect rect( 0, 0, 2 * width, 2 * height );
|
|
rect\&.moveCenter( points[0] );
|
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|
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adjusted += rect\&.topLeft();
|
|
adjusted += rect\&.bottomRight();
|
|
}
|
|
return adjusted;
|
|
}
|
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.fi
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.PP
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.RE
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.PP
|
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\fBParameters\fP
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.RS 4
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\fIpoints\fP Selected points
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Selected points unmodified
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.RE
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.PP
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.PP
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Definition at line 783 of file qwt_picker\&.cpp\&.
|
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.SS "void QwtPicker::append (const QPoint & pos)\fC [protected]\fP, \fC [virtual]\fP"
|
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Append a point to the selection and update rubber band and tracker\&. The \fBappended()\fP signal is emitted\&.
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.PP
|
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\fBParameters\fP
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.RS 4
|
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\fIpos\fP Additional point
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBisActive()\fP, \fBbegin()\fP, \fBend()\fP, \fBmove()\fP, \fBappended()\fP
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.RE
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.PP
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.PP
|
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Reimplemented in \fBQwtPolarPicker\fP, and \fBQwtPlotPicker\fP\&.
|
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.PP
|
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Definition at line 1320 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::appended (const QPoint & pos)\fC [signal]\fP"
|
|
A signal emitted when a point has been appended to the selection
|
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.PP
|
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\fBParameters\fP
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.RS 4
|
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\fIpos\fP Position of the appended point\&.
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.RE
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.PP
|
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\fBSee also\fP
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.RS 4
|
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\fBappend()\fP\&. \fBmoved()\fP
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.RE
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.PP
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.SS "void QwtPicker::begin ()\fC [protected]\fP, \fC [virtual]\fP"
|
|
Open a selection setting the state to active
|
|
.PP
|
|
\fBSee also\fP
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.RS 4
|
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\fBisActive()\fP, \fBend()\fP, \fBappend()\fP, \fBmove()\fP
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.RE
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.PP
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.PP
|
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Reimplemented in \fBQwtPlotZoomer\fP\&.
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.PP
|
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Definition at line 1239 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::changed (const QPolygon & selection)\fC [signal]\fP"
|
|
A signal emitted when the active selection has been changed\&. This might happen when the observed widget is resized\&.
|
|
.PP
|
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\fBParameters\fP
|
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.RS 4
|
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\fIselection\fP Changed selection
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.RE
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.PP
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\fBSee also\fP
|
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.RS 4
|
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\fBstretchSelection()\fP
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.RE
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.PP
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|
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.SS "void QwtPicker::drawRubberBand (QPainter * painter) const\fC [virtual]\fP"
|
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Draw a rubber band, depending on \fBrubberBand()\fP
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|
.PP
|
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\fBParameters\fP
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.RS 4
|
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\fIpainter\fP Painter, initialized with a clip region
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.RE
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.PP
|
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\fBSee also\fP
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.RS 4
|
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\fBrubberBand()\fP, \fBRubberBand\fP
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.RE
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.PP
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.PP
|
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Definition at line 637 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::drawTracker (QPainter * painter) const\fC [virtual]\fP"
|
|
Draw the tracker
|
|
.PP
|
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\fBParameters\fP
|
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.RS 4
|
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\fIpainter\fP Painter
|
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.RE
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.PP
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\fBSee also\fP
|
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.RS 4
|
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\fBtrackerRect()\fP, \fBtrackerText()\fP
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.RE
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.PP
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.PP
|
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Definition at line 732 of file qwt_picker\&.cpp\&.
|
|
.SS "bool QwtPicker::end (bool ok = \fCtrue\fP)\fC [protected]\fP, \fC [virtual]\fP"
|
|
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|
.PP
|
|
Close a selection setting the state to inactive\&. The selection is validated and maybe fixed by \fBaccept()\fP\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIok\fP If true, complete the selection and emit a selected signal otherwise discard the selection\&.
|
|
.RE
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.PP
|
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\fBReturns\fP
|
|
.RS 4
|
|
true if the selection is accepted, false otherwise
|
|
.RE
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.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBisActive()\fP, \fBbegin()\fP, \fBappend()\fP, \fBmove()\fP, \fBselected()\fP, \fBaccept()\fP
|
|
.RE
|
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.PP
|
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|
.PP
|
|
Reimplemented in \fBQwtPolarPicker\fP, \fBQwtPlotZoomer\fP, and \fBQwtPlotPicker\fP\&.
|
|
.PP
|
|
Definition at line 1272 of file qwt_picker\&.cpp\&.
|
|
.SS "bool QwtPicker::eventFilter (QObject * object, QEvent * event)\fC [override]\fP, \fC [virtual]\fP"
|
|
|
|
.PP
|
|
Event filter\&. When \fBisEnabled()\fP is true all events of the observed widget are filtered\&. Mouse and keyboard events are translated into widgetMouse- and widgetKey- and widgetWheel-events\&. Paint and Resize events are handled to keep rubber band and tracker up to date\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIobject\fP Object to be filtered
|
|
.br
|
|
\fIevent\fP Event
|
|
.RE
|
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.PP
|
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\fBReturns\fP
|
|
.RS 4
|
|
Always false\&.
|
|
.RE
|
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.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBwidgetEnterEvent()\fP, \fBwidgetLeaveEvent()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP, QObject::installEventFilter(), QObject::event()
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 893 of file qwt_picker\&.cpp\&.
|
|
.SS "bool QwtPicker::isActive () const"
|
|
A picker is active between \fBbegin()\fP and \fBend()\fP\&.
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
true if the selection is active\&.
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 1393 of file qwt_picker\&.cpp\&.
|
|
.SS "bool QwtPicker::isEnabled () const"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
true when enabled, false otherwise
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBsetEnabled()\fP, \fBeventFilter()\fP
|
|
.RE
|
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.PP
|
|
|
|
.PP
|
|
Definition at line 399 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::move (const QPoint & pos)\fC [protected]\fP, \fC [virtual]\fP"
|
|
Move the last point of the selection The \fBmoved()\fP signal is emitted\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIpos\fP New position
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBisActive()\fP, \fBbegin()\fP, \fBend()\fP, \fBappend()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Reimplemented in \fBQwtPolarPicker\fP, and \fBQwtPlotPicker\fP\&.
|
|
.PP
|
|
Definition at line 1338 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::moved (const QPoint & pos)\fC [signal]\fP"
|
|
A signal emitted whenever the last appended point of the selection has been moved\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIpos\fP Position of the moved last point of the selection\&.
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBmove()\fP, \fBappended()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.SS "QPainterPath QwtPicker::pickArea () const\fC [virtual]\fP"
|
|
Find the area of the observed widget, where selection might happen\&.
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
\fBparentWidget()\fP->contentsRect()
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Reimplemented in \fBQwtPolarPicker\fP\&.
|
|
.PP
|
|
Definition at line 1474 of file qwt_picker\&.cpp\&.
|
|
.SS "const QPolygon & QwtPicker::pickedPoints () const\fC [protected]\fP"
|
|
Return the points, that have been collected so far\&. The \fBselection()\fP is calculated from the \fBpickedPoints()\fP in \fBadjustedPoints()\fP\&.
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Picked points
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 1403 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::remove ()\fC [protected]\fP, \fC [virtual]\fP"
|
|
Remove the last point of the selection The \fBremoved()\fP signal is emitted\&.
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBisActive()\fP, \fBbegin()\fP, \fBend()\fP, \fBappend()\fP, \fBmove()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 1359 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::removed (const QPoint & pos)\fC [signal]\fP"
|
|
A signal emitted whenever the last appended point of the selection has been removed\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIpos\fP Position of the point, that has been removed
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBremove()\fP, \fBappended()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.SS "void QwtPicker::reset ()\fC [protected]\fP, \fC [virtual]\fP"
|
|
Reset the state machine and terminate ( end(false) ) the selection
|
|
.PP
|
|
Definition at line 1303 of file qwt_picker\&.cpp\&.
|
|
.SS "\fBQwtPicker::ResizeMode\fP QwtPicker::resizeMode () const"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Resize mode
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBsetResizeMode()\fP, \fBResizeMode\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 361 of file qwt_picker\&.cpp\&.
|
|
.SS "\fBQwtPicker::RubberBand\fP QwtPicker::rubberBand () const"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Rubber band style
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBsetRubberBand()\fP, \fBRubberBand\fP, \fBrubberBandPen()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 298 of file qwt_picker\&.cpp\&.
|
|
.SS "QRegion QwtPicker::rubberBandMask () const\fC [virtual]\fP"
|
|
Calculate the mask for the rubber band overlay
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Region for the mask
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
QWidget::setMask()
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 525 of file qwt_picker\&.cpp\&.
|
|
.SS "const \fBQwtWidgetOverlay\fP * QwtPicker::rubberBandOverlay () const\fC [protected]\fP"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Overlay displaying the rubber band
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 1581 of file qwt_picker\&.cpp\&.
|
|
.SS "QPen QwtPicker::rubberBandPen () const"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Rubber band pen
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBsetRubberBandPen()\fP, \fBrubberBand()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 472 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::selected (const QPolygon & polygon)\fC [signal]\fP"
|
|
A signal emitting the selected points, at the end of a selection\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIpolygon\fP Selected points
|
|
.RE
|
|
.PP
|
|
|
|
.SS "QPolygon QwtPicker::selection () const"
|
|
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Selected points
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBpickedPoints()\fP, \fBadjustedPoints()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 792 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setEnabled (bool enabled)\fC [slot]\fP"
|
|
|
|
.PP
|
|
En/disable the picker\&. When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIenabled\fP true or false
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBisEnabled()\fP, \fBeventFilter()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 375 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setResizeMode (\fBResizeMode\fP mode)"
|
|
|
|
.PP
|
|
Set the resize mode\&. The resize mode controls what to do with the selected points of an active selection when the observed widget is resized\&.
|
|
.PP
|
|
Stretch means the points are scaled according to the new size, KeepSize means the points remain unchanged\&.
|
|
.PP
|
|
The default mode is Stretch\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fImode\fP Resize mode
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBresizeMode()\fP, \fBResizeMode\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 351 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setRubberBand (\fBRubberBand\fP rubberBand)"
|
|
Set the rubber band style
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIrubberBand\fP Rubber band style The default value is NoRubberBand\&.
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBrubberBand()\fP, \fBRubberBand\fP, \fBsetRubberBandPen()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 289 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setRubberBandPen (const QPen & pen)"
|
|
Set the pen for the rubberband
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIpen\fP Rubber band pen
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBrubberBandPen()\fP, \fBsetRubberBand()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 459 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setStateMachine (\fBQwtPickerMachine\fP * stateMachine)"
|
|
Set a state machine and delete the previous one
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIstateMachine\fP State machine
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBstateMachine()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 229 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::setTrackerFont (const QFont & font)"
|
|
Set the font for the tracker
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIfont\fP Tracker font
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBtrackerFont()\fP, \fBsetTrackerMode()\fP, \fBsetTrackerPen()\fP
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Definition at line 410 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::setTrackerMode (\fBDisplayMode\fP mode)"
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.PP
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Set the display mode of the tracker\&. A tracker displays information about current position of the cursor as a string\&. The display mode controls if the tracker has to be displayed whenever the observed widget has focus and cursor (AlwaysOn), never (AlwaysOff), or only when the selection is active (ActiveOnly)\&.
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.PP
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\fBParameters\fP
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\fImode\fP Tracker display mode
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\fBWarning\fP
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.RS 4
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In case of AlwaysOn, mouseTracking will be enabled for the observed widget\&.
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\fBSee also\fP
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\fBtrackerMode()\fP, \fBDisplayMode\fP
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Definition at line 319 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::setTrackerPen (const QPen & pen)"
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Set the pen for the tracker
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.PP
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\fBParameters\fP
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.RS 4
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\fIpen\fP Tracker pen
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\fBSee also\fP
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.RS 4
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\fBtrackerPen()\fP, \fBsetTrackerMode()\fP, \fBsetTrackerFont()\fP
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Definition at line 435 of file qwt_picker\&.cpp\&.
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.SS "\fBQwtPickerMachine\fP * QwtPicker::stateMachine ()"
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.PP
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\fBReturns\fP
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.RS 4
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Assigned state machine
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\fBSee also\fP
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\fBsetStateMachine()\fP
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Definition at line 247 of file qwt_picker\&.cpp\&.
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.SS "const \fBQwtPickerMachine\fP * QwtPicker::stateMachine () const"
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.PP
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\fBReturns\fP
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.RS 4
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Assigned state machine
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\fBSee also\fP
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\fBsetStateMachine()\fP
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Definition at line 256 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::stretchSelection (const QSize & oldSize, const QSize & newSize)\fC [protected]\fP, \fC [virtual]\fP"
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Scale the selection by the ratios of oldSize and newSize The \fBchanged()\fP signal is emitted\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIoldSize\fP Previous size
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.br
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\fInewSize\fP Current size
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\fBSee also\fP
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.RS 4
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\fBResizeMode\fP, \fBsetResizeMode()\fP, \fBresizeMode()\fP
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Definition at line 1417 of file qwt_picker\&.cpp\&.
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.SS "QFont QwtPicker::trackerFont () const"
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.PP
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\fBReturns\fP
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.RS 4
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Tracker font
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetTrackerFont()\fP, \fBtrackerMode()\fP, \fBtrackerPen()\fP
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Definition at line 424 of file qwt_picker\&.cpp\&.
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.SS "QRegion QwtPicker::trackerMask () const\fC [virtual]\fP"
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Calculate the mask for the tracker overlay
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.PP
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\fBReturns\fP
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.RS 4
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Region with one rectangle: trackerRect( trackerFont() );
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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QWidget::setMask(), \fBtrackerRect()\fP
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.RE
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.PP
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.PP
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Definition at line 514 of file qwt_picker\&.cpp\&.
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.SS "\fBQwtPicker::DisplayMode\fP QwtPicker::trackerMode () const"
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.PP
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\fBReturns\fP
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.RS 4
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Tracker display mode
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBsetTrackerMode()\fP, \fBDisplayMode\fP
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.RE
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.PP
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Definition at line 332 of file qwt_picker\&.cpp\&.
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.SS "const \fBQwtWidgetOverlay\fP * QwtPicker::trackerOverlay () const\fC [protected]\fP"
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.PP
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\fBReturns\fP
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.RS 4
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Overlay displaying the tracker text
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.RE
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.PP
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Definition at line 1587 of file qwt_picker\&.cpp\&.
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.SS "QPen QwtPicker::trackerPen () const"
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.PP
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\fBReturns\fP
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.RS 4
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Tracker pen
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.RE
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\fBSee also\fP
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.RS 4
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\fBsetTrackerPen()\fP, \fBtrackerMode()\fP, \fBtrackerFont()\fP
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.RE
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Definition at line 448 of file qwt_picker\&.cpp\&.
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.SS "QPoint QwtPicker::trackerPosition () const"
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.PP
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\fBReturns\fP
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.RS 4
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Current position of the tracker
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.RE
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.PP
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.PP
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Definition at line 798 of file qwt_picker\&.cpp\&.
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.SS "QRect QwtPicker::trackerRect (const QFont & font) const\fC [virtual]\fP"
|
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Calculate the bounding rectangle for the tracker text from the current position of the tracker
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.PP
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\fBParameters\fP
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.RS 4
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\fIfont\fP Font of the tracker text
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Bounding rectangle of the tracker text
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBtrackerPosition()\fP
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.RE
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.PP
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.PP
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Definition at line 812 of file qwt_picker\&.cpp\&.
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.SS "\fBQwtText\fP QwtPicker::trackerText (const QPoint & pos) const\fC [virtual]\fP"
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.PP
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Return the label for a position\&. 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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.PP
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The format for the string conversion is '%d'\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIpos\fP Position
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.RE
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.PP
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\fBReturns\fP
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.RS 4
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Converted position as string
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.RE
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.PP
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.PP
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Reimplemented in \fBQwtPolarPicker\fP, and \fBQwtPlotPicker\fP\&.
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.PP
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Definition at line 490 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::transition (const QEvent * event)\fC [protected]\fP, \fC [virtual]\fP"
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Passes an event to the state machine and executes the resulting commands\&. Append and Move commands use the current position of the cursor ( QCursor::pos() )\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIevent\fP Event
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.RE
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.PP
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.PP
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Definition at line 1176 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::widgetEnterEvent (QEvent * event)\fC [protected]\fP, \fC [virtual]\fP"
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Handle a enter event for the observed widget\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIevent\fP Qt event
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.RE
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.PP
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 1018 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::widgetKeyPressEvent (QKeyEvent * keyEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
|
Handle a key press event for the observed widget\&.
|
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.PP
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|
Selections can be completely done by the keyboard\&. The arrow keys move the cursor, the abort key aborts a selection\&. All other keys are handled by the current state machine\&.
|
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.PP
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\fBParameters\fP
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.RS 4
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\fIkeyEvent\fP Key event
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.RE
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyReleaseEvent()\fP, \fBstateMachine()\fP, \fBQwtEventPattern::KeyPatternCode\fP
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.RE
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.PP
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.PP
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Reimplemented in \fBQwtPlotZoomer\fP\&.
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.PP
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Definition at line 1112 of file qwt_picker\&.cpp\&.
|
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.SS "void QwtPicker::widgetKeyReleaseEvent (QKeyEvent * keyEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
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Handle a key release event for the observed widget\&.
|
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.PP
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Passes the event to the state machine\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIkeyEvent\fP Key event
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.RE
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBstateMachine()\fP
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Definition at line 1164 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::widgetLeaveEvent (QEvent * event)\fC [protected]\fP, \fC [virtual]\fP"
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Handle a leave event for the observed widget\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fIevent\fP Qt event
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.RE
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 1032 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::widgetMouseDoubleClickEvent (QMouseEvent * mouseEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
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Handle mouse double click event for the observed widget\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fImouseEvent\fP Mouse event
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 1064 of file qwt_picker\&.cpp\&.
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.SS "void QwtPicker::widgetMouseMoveEvent (QMouseEvent * mouseEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
|
Handle a mouse move event for the observed widget\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fImouseEvent\fP Mouse event
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 996 of file qwt_picker\&.cpp\&.
|
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.SS "void QwtPicker::widgetMousePressEvent (QMouseEvent * mouseEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
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Handle a mouse press event for the observed widget\&.
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.PP
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\fBParameters\fP
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.RS 4
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\fImouseEvent\fP Mouse event
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.RE
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\fBSee also\fP
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.RS 4
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\fBeventFilter()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 982 of file qwt_picker\&.cpp\&.
|
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.SS "void QwtPicker::widgetMouseReleaseEvent (QMouseEvent * mouseEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
|
Handle a mouse release event for the observed widget\&.
|
|
.PP
|
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\fBParameters\fP
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.RS 4
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\fImouseEvent\fP Mouse event
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.RE
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.PP
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\fBSee also\fP
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.RS 4
|
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetWheelEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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.RE
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.PP
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.PP
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Reimplemented in \fBQwtPlotZoomer\fP\&.
|
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.PP
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Definition at line 1050 of file qwt_picker\&.cpp\&.
|
|
.SS "void QwtPicker::widgetWheelEvent (QWheelEvent * wheelEvent)\fC [protected]\fP, \fC [virtual]\fP"
|
|
Handle a wheel event for the observed widget\&.
|
|
.PP
|
|
Move the last point of the selection in case of \fBisActive()\fP == true
|
|
.PP
|
|
\fBParameters\fP
|
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.RS 4
|
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\fIwheelEvent\fP Wheel event
|
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.RE
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.PP
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\fBSee also\fP
|
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.RS 4
|
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\fBeventFilter()\fP, \fBwidgetMousePressEvent()\fP, \fBwidgetMouseReleaseEvent()\fP, \fBwidgetMouseDoubleClickEvent()\fP, \fBwidgetMouseMoveEvent()\fP, \fBwidgetKeyPressEvent()\fP, \fBwidgetKeyReleaseEvent()\fP
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Definition at line 1081 of file qwt_picker\&.cpp\&.
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.SH "Author"
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.PP
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.
|