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qgsmaprenderercustompainterjob.h
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1 /***************************************************************************
2  qgsmaprenderercustompainterjob.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 QGSMAPRENDERERCUSTOMPAINTERJOB_H
17 #define QGSMAPRENDERERCUSTOMPAINTERJOB_H
18 
19 #include "qgsmaprendererjob.h"
20 
21 #include <QEventLoop>
22 
32 {
33  Q_OBJECT
34  public:
35  QgsMapRendererCustomPainterJob( const QgsMapSettings& settings, QPainter* painter );
37 
38  virtual void start();
39  virtual void cancel();
40  virtual void waitForFinished();
41  virtual bool isActive() const;
43 
45  const LayerRenderJobs& jobs() const { return mLayerJobs; }
46 
59  void waitForFinishedWithEventLoop( QEventLoop::ProcessEventsFlags flags = QEventLoop::AllEvents );
60 
70  void renderSynchronously();
71 
72  protected slots:
73  void futureFinished();
74 
75  protected:
76  static void staticRender( QgsMapRendererCustomPainterJob* self ); // function to be used within the thread
77 
78  // these methods are called within worker thread
79  void doRender();
80 
81  private:
82  QPainter* mPainter;
83  QFuture<void> mFuture;
84  QFutureWatcher<void> mFutureWatcher;
85  QgsRenderContext mLabelingRenderContext;
86  QgsPalLabeling* mLabelingEngine;
87 
88  bool mActive;
89  LayerRenderJobs mLayerJobs;
90  bool mRenderSynchronously;
91 };
92 
93 
94 #endif // QGSMAPRENDERERCUSTOMPAINTERJOB_H
Job implementation that renders everything sequentially using a custom painter.
Definition: qgsmaprenderercustompainterjob.h:31
Abstract base class for map rendering implementations.
Definition: qgsmaprendererjob.h:78
Definition: qgspallabeling.h:705
The QgsMapSettings class contains configuration for rendering of the map.
Definition: qgsmapsettings.h:52
virtual void waitForFinished()=0
Block until the job has finished.
const LayerRenderJobs & jobs() const
Definition: qgsmaprenderercustompainterjob.h:45
virtual void start()=0
Start the rendering job and immediately return.
Contains information about the context of a rendering operation.
Definition: qgsrendercontext.h:39
virtual void cancel()=0
Stop the rendering job - does not return until the job has terminated.
Class that stores computed placement from labeling engine.
Definition: qgspallabeling.h:685
QList< LayerRenderJob > LayerRenderJobs
Definition: qgsmaprendererjob.h:51
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.