.TH "QwtPlotCanvas" 3 "Tue Nov 20 2012" "Version 5.2.3" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtPlotCanvas \- 
.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_plot_canvas\&.h>\fP
.SS "Public Types"

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.RI "enum \fBFocusIndicator\fP { \fBNoFocusIndicator\fP, \fBCanvasFocusIndicator\fP, \fBItemFocusIndicator\fP }"
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.RI "enum \fBPaintAttribute\fP { \fBPaintCached\fP =  1, \fBPaintPacked\fP =  2 }"
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.SS "Public Member Functions"

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.RI "\fBQwtPlotCanvas\fP (\fBQwtPlot\fP *)"
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.RI "virtual \fB~QwtPlotCanvas\fP ()"
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.RI "\fBFocusIndicator\fP \fBfocusIndicator\fP () const "
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.RI "void \fBinvalidatePaintCache\fP ()"
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.RI "QPixmap * \fBpaintCache\fP ()"
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.RI "const QPixmap * \fBpaintCache\fP () const "
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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 "void \fBreplot\fP ()"
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.RI "void \fBsetFocusIndicator\fP (\fBFocusIndicator\fP)"
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.RI "void \fBsetPaintAttribute\fP (\fBPaintAttribute\fP, bool on=true)"
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.RI "bool \fBtestPaintAttribute\fP (\fBPaintAttribute\fP) const "
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.SS "Protected Member Functions"

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.RI "void \fBdrawCanvas\fP (QPainter *painter=NULL)"
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.RI "virtual void \fBdrawContents\fP (QPainter *)"
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.RI "virtual void \fBdrawFocusIndicator\fP (QPainter *)"
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.RI "virtual void \fBhideEvent\fP (QHideEvent *)"
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.RI "virtual void \fBpaintEvent\fP (QPaintEvent *)"
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.SH "Detailed Description"
.PP 
Canvas of a \fBQwtPlot\fP\&. 

\fBSee also:\fP
.RS 4
\fBQwtPlot\fP 
.RE
.PP

.SH "Member Enumeration Documentation"
.PP 
.SS "enum \fBQwtPlotCanvas::FocusIndicator\fP"

.PP
Focus indicator\&. .IP "\(bu" 2
NoFocusIndicator
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 Don't paint a focus indicator
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.IP "\(bu" 2
CanvasFocusIndicator
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 The focus is related to the complete canvas\&. Paint the focus indicator using paintFocus()
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.IP "\(bu" 2
ItemFocusIndicator
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 The focus is related to an item (curve, point, \&.\&.\&.) on the canvas\&. It is up to the application to display a focus indication using f\&.e\&. highlighting\&.
.PP
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\fBSee also:\fP
.RS 4
\fBsetFocusIndicator()\fP, \fBfocusIndicator()\fP, paintFocus() 
.RE
.PP

.SS "enum \fBQwtPlotCanvas::PaintAttribute\fP"

.PP
Paint attributes\&. .IP "\(bu" 2
PaintCached
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 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\&. Disabling the cache will improve the performance for incremental paints (using \fBQwtPlotCurve::draw\fP)\&.
.PP
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.IP "\(bu" 2
PaintPacked
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 Suppress system background repaints and paint it together with the canvas contents\&. Painting packed might avoid flickering for expensive repaints, when there is a notable gap between painting the background and the plot contents\&.
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.PP
The default setting enables PaintCached and PaintPacked
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\fBSee also:\fP
.RS 4
\fBsetPaintAttribute()\fP, \fBtestPaintAttribute()\fP, \fBpaintCache()\fP 
.RE
.PP

.SH "Member Function Documentation"
.PP 
.SS "void QwtPlotCanvas::drawCanvas (QPainter *painter = \fCNULL\fP)\fC [protected]\fP"
Draw the the canvas
.PP
Paints all plot items to the contentsRect(), using \fBQwtPlot::drawCanvas\fP and updates the paint cache\&.
.PP
\fBParameters:\fP
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\fIpainter\fP Painter
.RE
.PP
\fBSee also:\fP
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\fBQwtPlot::drawCanvas()\fP, setPaintAttributes(), testPaintAttributes() 
.RE
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.SS "void QwtPlotCanvas::drawContents (QPainter *painter)\fC [protected]\fP, \fC [virtual]\fP"
Redraw the canvas, and focus rect 
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\fBParameters:\fP
.RS 4
\fIpainter\fP Painter 
.RE
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.SS "void QwtPlotCanvas::drawFocusIndicator (QPainter *painter)\fC [protected]\fP, \fC [virtual]\fP"
Draw the focus indication 
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\fBParameters:\fP
.RS 4
\fIpainter\fP Painter 
.RE
.PP

.SS "\fBQwtPlotCanvas::FocusIndicator\fP QwtPlotCanvas::focusIndicator () const"
\fBReturns:\fP
.RS 4
Focus indicator
.RE
.PP
\fBSee also:\fP
.RS 4
\fBFocusIndicator\fP, \fBsetFocusIndicator()\fP 
.RE
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.SS "void QwtPlotCanvas::hideEvent (QHideEvent *event)\fC [protected]\fP, \fC [virtual]\fP"
Hide event 
.PP
\fBParameters:\fP
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\fIevent\fP Hide event 
.RE
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.SS "void QwtPlotCanvas::paintEvent (QPaintEvent *event)\fC [protected]\fP, \fC [virtual]\fP"
Paint event 
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\fBParameters:\fP
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\fIevent\fP Paint event 
.RE
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.SS "void QwtPlotCanvas::replot ()"
Invalidate the paint cache and repaint the canvas 
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\fBSee also:\fP
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\fBinvalidatePaintCache()\fP 
.RE
.PP

.SS "void QwtPlotCanvas::setFocusIndicator (\fBFocusIndicator\fPfocusIndicator)"
Set the focus indicator
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\fBSee also:\fP
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\fBFocusIndicator\fP, \fBfocusIndicator()\fP 
.RE
.PP

.SS "void QwtPlotCanvas::setPaintAttribute (\fBPaintAttribute\fPattribute, boolon = \fCtrue\fP)"

.PP
Changing the paint attributes\&. \fBParameters:\fP
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\fIattribute\fP Paint attribute 
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\fIon\fP On/Off
.RE
.PP
The default setting enables PaintCached and PaintPacked
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\fBSee also:\fP
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\fBtestPaintAttribute()\fP, \fBdrawCanvas()\fP, \fBdrawContents()\fP, \fBpaintCache()\fP 
.RE
.PP

.SS "bool QwtPlotCanvas::testPaintAttribute (\fBPaintAttribute\fPattribute) const"
Test wether a paint attribute is enabled
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\fBParameters:\fP
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\fIattribute\fP Paint attribute 
.RE
.PP
\fBReturns:\fP
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true if the attribute is enabled 
.RE
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\fBSee also:\fP
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\fBsetPaintAttribute()\fP 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.