QGIS API Documentation  3.14.0-Pi (9f7028fd23)
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 
34 {
35  Q_OBJECT
36  public:
38  ~QgsMapRendererSequentialJob() override;
39 
40  void start() override;
41  void cancel() override;
42  void cancelWithoutBlocking() override;
43  void waitForFinished() override;
44  bool isActive() const override;
45 
46  bool usedCachedLabels() const override;
48 
49  // from QgsMapRendererJobWithPreview
50  QImage renderedImage() override;
51 
52  public slots:
53 
54  void internalFinished();
55 
56  private:
57 
58  QgsMapRendererCustomPainterJob *mInternalJob = nullptr;
59  QImage mImage;
60  QPainter *mPainter = nullptr;
61  std::unique_ptr< QgsLabelingResults > mLabelingResults;
62  bool mUsedCachedLabels = false;
63 
64 };
65 
66 
67 #endif // QGSMAPRENDERERSEQUENTIALJOB_H
QgsMapRendererJob::usedCachedLabels
virtual bool usedCachedLabels() const =0
Returns true if the render job was able to use a cached labeling solution.
QgsMapRendererJob::isActive
virtual bool isActive() const =0
Tell whether the rendering job is currently running in background.
QgsMapRendererQImageJob::renderedImage
virtual QImage renderedImage()=0
Gets a preview/resulting image.
QgsLabelingResults
Definition: qgspallabeling.h:1224
QgsMapRendererJob::waitForFinished
virtual void waitForFinished()=0
Block until the job has finished.
SIP_TRANSFER
#define SIP_TRANSFER
Definition: qgis_sip.h:36
QgsMapRendererSequentialJob
Definition: qgsmaprenderersequentialjob.h:33
qgsmaprendererjob.h
QgsMapRendererJob::start
virtual void start()=0
Start the rendering job and immediately return.
QgsMapRendererCustomPainterJob
Definition: qgsmaprenderercustompainterjob.h:63
QgsMapRendererQImageJob
Definition: qgsmaprendererjob.h:435
QgsMapRendererJob::cancelWithoutBlocking
virtual void cancelWithoutBlocking()=0
Triggers cancellation of the rendering job without blocking.
QgsMapRendererJob::takeLabelingResults
virtual QgsLabelingResults * takeLabelingResults()=0
Gets pointer to internal labeling engine (in order to get access to the results).
QgsMapRendererJob::cancel
virtual void cancel()=0
Stop the rendering job - does not return until the job has terminated.
QgsMapSettings
Definition: qgsmapsettings.h:86