qgsmaprenderercustompainterjob.h

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/***************************************************************************
  qgsmaprenderercustompainterjob.h
  --------------------------------------
  Date                 : December 2013
  Copyright            : (C) 2013 by Martin Dobias
  Email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSMAPRENDERERCUSTOMPAINTERJOB_H
#define QGSMAPRENDERERCUSTOMPAINTERJOB_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsmaprendererjob.h"
 
#include <QEventLoop>
 
class CORE_EXPORT QgsMapRendererAbstractCustomPainterJob : public QgsMapRendererJob
{
    Q_OBJECT
  public:
 
    QgsMapRendererAbstractCustomPainterJob( const QgsMapSettings &settings );
 
  protected:
 
    void preparePainter( QPainter *painter, const QColor &backgroundColor = Qt::transparent );
 
};
 
class CORE_EXPORT QgsMapRendererCustomPainterJob : public QgsMapRendererAbstractCustomPainterJob
{
    Q_OBJECT
  public:
    QgsMapRendererCustomPainterJob( const QgsMapSettings &settings, QPainter *painter );
    ~QgsMapRendererCustomPainterJob() override;
 
    void start() override;
    void cancel() override;
    void cancelWithoutBlocking() override;
    void waitForFinished() override;
    bool isActive() const override;
    bool usedCachedLabels() const override;
    QgsLabelingResults *takeLabelingResults() SIP_TRANSFER override;
 
    const LayerRenderJobs &jobs() const { return mLayerJobs; } SIP_SKIP
 
    void waitForFinishedWithEventLoop( QEventLoop::ProcessEventsFlags flags = QEventLoop::AllEvents );
 
    void renderSynchronously();
 
    void prepare();
 
    void renderPrepared();
 
  private slots:
    void futureFinished();
 
  private:
    static void staticRender( QgsMapRendererCustomPainterJob *self ); // function to be used within the thread
 
    // these methods are called within worker thread
    void doRender();
 
    QPainter *mPainter = nullptr;
    QFuture<void> mFuture;
    QFutureWatcher<void> mFutureWatcher;
    std::unique_ptr< QgsLabelingEngine > mLabelingEngineV2;
 
    bool mActive;
    LayerRenderJobs mLayerJobs;
    LabelRenderJob mLabelJob;
    bool mRenderSynchronously = false;
    bool mPrepared = false;
    bool mPrepareOnly = false;
 
    LayerRenderJobs mSecondPassLayerJobs;
};
 
 
#endif // QGSMAPRENDERERCUSTOMPAINTERJOB_H