QGIS API Documentation  2.99.0-Master (0a63d1f)
qgsmaprenderersequentialjob.h
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1 /***************************************************************************
2  qgsmaprenderersequentialjob.h
3  --------------------------------------
4  Date : December 2013
5  Copyright : (C) 2013 by Martin Dobias
6  Email : wonder dot sk at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #ifndef QGSMAPRENDERERSEQUENTIALJOB_H
17 #define QGSMAPRENDERERSEQUENTIALJOB_H
18 
19 #include "qgis_core.h"
20 #include "qgsmaprendererjob.h"
21 
23 
33 {
34  Q_OBJECT
35  public:
38 
39  virtual void start() override;
40  virtual void cancel() override;
41  virtual void waitForFinished() override;
42  virtual bool isActive() const override;
43 
44  virtual QgsLabelingResults* takeLabelingResults() override;
45 
46  // from QgsMapRendererJobWithPreview
47  virtual QImage renderedImage() override;
48 
49  public slots:
50 
51  void internalFinished();
52 
53  protected:
54 
56  QImage mImage;
57  QPainter* mPainter;
59 };
60 
61 
62 #endif // QGSMAPRENDERERSEQUENTIALJOB_H
Job implementation that renders everything sequentially using a custom painter.
virtual QImage renderedImage()=0
Get a preview/resulting image.
The QgsMapSettings class contains configuration for rendering of the map.
virtual void waitForFinished()=0
Block until the job has finished.
virtual void start()=0
Start the rendering job and immediately return.
Job implementation that renders everything sequentially in one thread.
Intermediate base class adding functionality that allows client to query the rendered image...
QgsMapRendererCustomPainterJob * mInternalJob
virtual void cancel()=0
Stop the rendering job - does not return until the job has terminated.
Class that stores computed placement from labeling engine.
virtual QgsLabelingResults * takeLabelingResults()=0
Get pointer to internal labeling engine (in order to get access to the results)
virtual bool isActive() const =0
Tell whether the rendering job is currently running in background.