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.TH "QwtPolarCanvas" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
.ad l
.nh
.SH NAME
QwtPolarCanvas \- Canvas of a \fBQwtPolarPlot\fP\&.
.SH SYNOPSIS
.br
.PP
.PP
\fC#include <qwt_polar_canvas\&.h>\fP
.PP
Inherits QFrame\&.
.SS "Public Types"
.in +1c
.ti -1c
.RI "enum \fBPaintAttribute\fP { \fBBackingStore\fP = 0x01 }"
.br
.RI "Paint attributes\&. "
.ti -1c
.RI "typedef QFlags< \fBPaintAttribute\fP > \fBPaintAttributes\fP"
.br
.in -1c
.SS "Public Member Functions"
.in +1c
.ti -1c
.RI "\fBQwtPolarCanvas\fP (\fBQwtPolarPlot\fP *)"
.br
.RI "Constructor\&. "
.ti -1c
.RI "virtual \fB~QwtPolarCanvas\fP ()"
.br
.RI "Destructor\&. "
.ti -1c
.RI "\fBQwtPolarPlot\fP * \fBplot\fP ()"
.br
.ti -1c
.RI "const \fBQwtPolarPlot\fP * \fBplot\fP () const"
.br
.ti -1c
.RI "void \fBsetPaintAttribute\fP (\fBPaintAttribute\fP, bool on=true)"
.br
.RI "Changing the paint attributes\&. "
.ti -1c
.RI "bool \fBtestPaintAttribute\fP (\fBPaintAttribute\fP) const"
.br
.ti -1c
.RI "const QPixmap * \fBbackingStore\fP () const"
.br
.ti -1c
.RI "void \fBinvalidateBackingStore\fP ()"
.br
.RI "Invalidate the internal backing store\&. "
.ti -1c
.RI "\fBQwtPointPolar\fP \fBinvTransform\fP (const QPoint &) const"
.br
.ti -1c
.RI "QPoint \fBtransform\fP (const \fBQwtPointPolar\fP &) const"
.br
.in -1c
.SS "Protected Member Functions"
.in +1c
.ti -1c
.RI "virtual void \fBpaintEvent\fP (QPaintEvent *) override"
.br
.ti -1c
.RI "virtual void \fBresizeEvent\fP (QResizeEvent *) override"
.br
.in -1c
.SH "Detailed Description"
.PP
Canvas of a \fBQwtPolarPlot\fP\&.
The canvas is the widget, where all polar items are painted to\&.
.PP
\fBNote\fP
.RS 4
In opposite to \fBQwtPlot\fP all axes are painted on the canvas\&.
.RE
.PP
\fBSee also\fP
.RS 4
\fBQwtPolarPlot\fP
.RE
.PP
.PP
Definition at line 27 of file qwt_polar_canvas\&.h\&.
.SH "Member Typedef Documentation"
.PP
.SS "typedef QFlags<\fBPaintAttribute\fP > \fBQwtPolarCanvas::PaintAttributes\fP"
An ORed combination of \fBPaintAttribute\fP values\&.
.PP
Definition at line 50 of file qwt_polar_canvas\&.h\&.
.SH "Member Enumeration Documentation"
.PP
.SS "enum \fBQwtPolarCanvas::PaintAttribute\fP"
.PP
Paint attributes\&. The default setting enables BackingStore
.PP
\fBSee also\fP
.RS 4
\fBsetPaintAttribute()\fP, \fBtestPaintAttribute()\fP, \fBbackingStore()\fP
.RE
.PP
.PP
\fBEnumerator\fP
.in +1c
.TP
\fB\fIBackingStore \fP\fP
Paint double buffered and reuse the content of the pixmap buffer for some spontaneous repaints that happen when a plot gets unhidden, deiconified or changes the focus\&.
.PP
Definition at line 40 of file qwt_polar_canvas\&.h\&.
.SH "Member Function Documentation"
.PP
.SS "const QPixmap * QwtPolarCanvas::backingStore () const"
.PP
\fBReturns\fP
.RS 4
Backing store, might be null
.RE
.PP
.PP
Definition at line 170 of file qwt_polar_canvas\&.cpp\&.
.SS "\fBQwtPointPolar\fP QwtPolarCanvas::invTransform (const QPoint & pos) const"
Translate a point from widget into plot coordinates
.PP
\fBParameters\fP
.RS 4
\fIpos\fP Point in widget coordinates of the plot canvas
.RE
.PP
\fBReturns\fP
.RS 4
Point in plot coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBtransform()\fP
.RE
.PP
.PP
Definition at line 267 of file qwt_polar_canvas\&.cpp\&.
.SS "void QwtPolarCanvas::paintEvent (QPaintEvent * event)\fC [override]\fP, \fC [protected]\fP, \fC [virtual]\fP"
Paint event
.PP
\fBParameters\fP
.RS 4
\fIevent\fP Paint event
.RE
.PP
.PP
Definition at line 186 of file qwt_polar_canvas\&.cpp\&.
.SS "\fBQwtPolarPlot\fP * QwtPolarCanvas::plot ()"
.PP
\fBReturns\fP
.RS 4
Parent plot widget
.RE
.PP
.PP
Definition at line 97 of file qwt_polar_canvas\&.cpp\&.
.SS "const \fBQwtPolarPlot\fP * QwtPolarCanvas::plot () const"
.PP
\fBReturns\fP
.RS 4
Parent plot widget
.RE
.PP
.PP
Definition at line 103 of file qwt_polar_canvas\&.cpp\&.
.SS "void QwtPolarCanvas::resizeEvent (QResizeEvent * event)\fC [override]\fP, \fC [protected]\fP, \fC [virtual]\fP"
Resize event
.PP
\fBParameters\fP
.RS 4
\fIevent\fP Resize event
.RE
.PP
.PP
Definition at line 251 of file qwt_polar_canvas\&.cpp\&.
.SS "void QwtPolarCanvas::setPaintAttribute (\fBPaintAttribute\fP attribute, bool on = \fCtrue\fP)"
.PP
Changing the paint attributes\&.
.PP
\fBParameters\fP
.RS 4
\fIattribute\fP Paint attribute
.br
\fIon\fP On/Off
.RE
.PP
The default setting enables BackingStore
.PP
\fBSee also\fP
.RS 4
\fBtestPaintAttribute()\fP, paintCache()
.RE
.PP
.PP
Definition at line 118 of file qwt_polar_canvas\&.cpp\&.
.SS "bool QwtPolarCanvas::testPaintAttribute (\fBPaintAttribute\fP attribute) const"
Test whether a paint attribute is enabled
.PP
\fBParameters\fP
.RS 4
\fIattribute\fP Paint attribute
.RE
.PP
\fBReturns\fP
.RS 4
true if the attribute is enabled
.RE
.PP
\fBSee also\fP
.RS 4
\fBsetPaintAttribute()\fP
.RE
.PP
.PP
Definition at line 164 of file qwt_polar_canvas\&.cpp\&.
.SS "QPoint QwtPolarCanvas::transform (const \fBQwtPointPolar\fP & polarPos) const"
Translate a point from plot into widget coordinates
.PP
\fBParameters\fP
.RS 4
\fIpolarPos\fP Point in plot coordinates
.RE
.PP
\fBReturns\fP
.RS 4
Point in widget coordinates
.RE
.PP
\fBSee also\fP
.RS 4
\fBtransform()\fP
.RE
.PP
.PP
Definition at line 310 of file qwt_polar_canvas\&.cpp\&.
.SH "Author"
.PP
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.