199 lines
4.8 KiB
Groff
199 lines
4.8 KiB
Groff
.TH "QwtPlotGLCanvas" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
|
|
.ad l
|
|
.nh
|
|
.SH NAME
|
|
QwtPlotGLCanvas \- An alternative canvas for a \fBQwtPlot\fP derived from QGLWidget\&.
|
|
|
|
.SH SYNOPSIS
|
|
.br
|
|
.PP
|
|
.PP
|
|
\fC#include <qwt_plot_glcanvas\&.h>\fP
|
|
.PP
|
|
Inherits QGLWidget, and \fBQwtPlotAbstractGLCanvas\fP\&.
|
|
.SS "Public Slots"
|
|
|
|
.in +1c
|
|
.ti -1c
|
|
.RI "void \fBreplot\fP ()"
|
|
.br
|
|
.in -1c
|
|
.SS "Public Member Functions"
|
|
|
|
.in +1c
|
|
.ti -1c
|
|
.RI "\fBQwtPlotGLCanvas\fP (\fBQwtPlot\fP *=NULL)"
|
|
.br
|
|
.RI "Constructor\&. "
|
|
.ti -1c
|
|
.RI "\fBQwtPlotGLCanvas\fP (const QGLFormat &, \fBQwtPlot\fP *=NULL)"
|
|
.br
|
|
.RI "Constructor\&. "
|
|
.ti -1c
|
|
.RI "virtual \fB~QwtPlotGLCanvas\fP ()"
|
|
.br
|
|
.RI "Destructor\&. "
|
|
.ti -1c
|
|
.RI "virtual Q_INVOKABLE void \fBinvalidateBackingStore\fP () override"
|
|
.br
|
|
.RI "Invalidate the internal backing store\&. "
|
|
.ti -1c
|
|
.RI "Q_INVOKABLE QPainterPath \fBborderPath\fP (const QRect &) const"
|
|
.br
|
|
.ti -1c
|
|
.RI "virtual bool \fBevent\fP (QEvent *) override"
|
|
.br
|
|
.in -1c
|
|
.SS "Protected Member Functions"
|
|
|
|
.in +1c
|
|
.ti -1c
|
|
.RI "virtual void \fBpaintEvent\fP (QPaintEvent *) override"
|
|
.br
|
|
.ti -1c
|
|
.RI "virtual void \fBinitializeGL\fP () override"
|
|
.br
|
|
.RI "No operation - reserved for some potential use in the future\&. "
|
|
.ti -1c
|
|
.RI "virtual void \fBpaintGL\fP () override"
|
|
.br
|
|
.RI "Paint the plot\&. "
|
|
.ti -1c
|
|
.RI "virtual void \fBresizeGL\fP (int width, int height) override"
|
|
.br
|
|
.RI "No operation - reserved for some potential use in the future\&. "
|
|
.in -1c
|
|
.SS "Additional Inherited Members"
|
|
.SH "Detailed Description"
|
|
.PP
|
|
An alternative canvas for a \fBQwtPlot\fP derived from QGLWidget\&.
|
|
|
|
\fBQwtPlotGLCanvas\fP implements the very basics to act as canvas inside of a \fBQwtPlot\fP widget\&. It might be extended to a full featured alternative to \fBQwtPlotCanvas\fP in a future version of Qwt\&.
|
|
.PP
|
|
Even if \fBQwtPlotGLCanvas\fP is not derived from QFrame it imitates its API\&. When using style sheets it supports the box model - beside backgrounds with rounded borders\&.
|
|
.PP
|
|
Since Qt 5\&.4 QOpenGLWidget is available, that is used by \fBQwtPlotOpenGLCanvas\fP\&.
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBQwtPlot::setCanvas()\fP, \fBQwtPlotCanvas\fP, \fBQwtPlotOpenGLCanvas\fP
|
|
.RE
|
|
.PP
|
|
\fBNote\fP
|
|
.RS 4
|
|
With Qt4 you might want to use the QPaintEngine::OpenGL paint engine ( see QGL::setPreferredPaintEngine() )\&. On a Linux test system QPaintEngine::OpenGL2 shows very basic problems like translated geometries\&.
|
|
.PP
|
|
Another way for getting hardware accelerated graphics is using an OpenGL offscreen buffer ( QwtPlotCanvas::OpenGLBuffer ) with \fBQwtPlotCanvas\fP\&. Performance is worse, than rendering straight to a QGLWidget, but is usually better integrated into a desktop application\&.
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 45 of file qwt_plot_glcanvas\&.h\&.
|
|
.SH "Constructor & Destructor Documentation"
|
|
.PP
|
|
.SS "QwtPlotGLCanvas::QwtPlotGLCanvas (\fBQwtPlot\fP * plot = \fCNULL\fP)\fC [explicit]\fP"
|
|
|
|
.PP
|
|
Constructor\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIplot\fP Parent plot widget
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBQwtPlot::setCanvas()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 56 of file qwt_plot_glcanvas\&.cpp\&.
|
|
.SS "QwtPlotGLCanvas::QwtPlotGLCanvas (const QGLFormat & format, \fBQwtPlot\fP * plot = \fCNULL\fP)\fC [explicit]\fP"
|
|
|
|
.PP
|
|
Constructor\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIformat\fP OpenGL rendering options
|
|
.br
|
|
\fIplot\fP Parent plot widget
|
|
.RE
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBQwtPlot::setCanvas()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 69 of file qwt_plot_glcanvas\&.cpp\&.
|
|
.SH "Member Function Documentation"
|
|
.PP
|
|
.SS "QPainterPath QwtPlotGLCanvas::borderPath (const QRect & rect) const"
|
|
Calculate the painter path for a styled or rounded border
|
|
.PP
|
|
When the canvas has no styled background or rounded borders the painter path is empty\&.
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIrect\fP Bounding rectangle of the canvas
|
|
.RE
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
Painter path, that can be used for clipping
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 157 of file qwt_plot_glcanvas\&.cpp\&.
|
|
.SS "bool QwtPlotGLCanvas::event (QEvent * event)\fC [override]\fP, \fC [virtual]\fP"
|
|
Qt event handler for QEvent::PolishRequest and QEvent::StyleChange
|
|
.PP
|
|
\fBParameters\fP
|
|
.RS 4
|
|
\fIevent\fP Qt Event
|
|
.RE
|
|
.PP
|
|
\fBReturns\fP
|
|
.RS 4
|
|
See QGLWidget::event()
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 110 of file qwt_plot_glcanvas\&.cpp\&.
|
|
.SS "void QwtPlotGLCanvas::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
|
|
\fBSee also\fP
|
|
.RS 4
|
|
\fBQwtPlot::drawCanvas()\fP
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 100 of file qwt_plot_glcanvas\&.cpp\&.
|
|
.SS "void QwtPlotGLCanvas::replot ()\fC [slot]\fP"
|
|
Invalidate the paint cache and repaint the canvas
|
|
.PP
|
|
\fBSee also\fP
|
|
.RS 4
|
|
invalidatePaintCache()
|
|
.RE
|
|
.PP
|
|
|
|
.PP
|
|
Definition at line 131 of file qwt_plot_glcanvas\&.cpp\&.
|
|
|
|
.SH "Author"
|
|
.PP
|
|
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.
|