QGIS API Documentation  3.21.0-Master (5b68dc587e)
qgspainterswapper.cpp
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1 /***************************************************************************
2  qgspainterswapper.cpp
3  ---------------------
4  begin : July 2019
5  copyright : (C) 2019 Hugo Mercier
6  email : hugo dot mercier at oslandia dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 #include "qgspainterswapper.h"
18 #include "qgsrendercontext.h"
19 #include <QPainter>
20 
21 QgsPainterSwapper::QgsPainterSwapper( QgsRenderContext &renderContext, QPainter *newPainter )
22  : mRenderContext( renderContext )
23  , mOriginalPainter( renderContext.painter() )
24 {
25  mRenderContext.setPainter( newPainter );
26 }
27 
29 {
30  mRenderContext.setPainter( mOriginalPainter );
31 }
QgsPainterSwapper(QgsRenderContext &renderContext, QPainter *newPainter)
QgsPainterSwapper constructor.
Contains information about the context of a rendering operation.
void setPainter(QPainter *p)
Sets the destination QPainter for the render operation.