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 "qgsmaprendererjob.h"

#include <QEventLoop>

class CORE_EXPORT QgsMapRendererCustomPainterJob : public QgsMapRendererJob
{
    Q_OBJECT
  public:
    QgsMapRendererCustomPainterJob( const QgsMapSettings& settings, QPainter* painter );
    ~QgsMapRendererCustomPainterJob();

    virtual void start() override;
    virtual void cancel() override;
    virtual void cancelWithoutBlocking() override;
    virtual void waitForFinished() override;
    virtual bool isActive() const override;
    virtual QgsLabelingResults* takeLabelingResults() override;

    const LayerRenderJobs& jobs() const { return mLayerJobs; }

    void waitForFinishedWithEventLoop( const QEventLoop::ProcessEventsFlags& flags = QEventLoop::AllEvents );

    void renderSynchronously();

  protected slots:
    void futureFinished();

  protected:
    static void staticRender( QgsMapRendererCustomPainterJob* self ); // function to be used within the thread

    // these methods are called within worker thread
    void doRender();

  private:
    QPainter* mPainter;
    QFuture<void> mFuture;
    QFutureWatcher<void> mFutureWatcher;
    QgsRenderContext mLabelingRenderContext;
    QgsPalLabeling* mLabelingEngine;
    QgsLabelingEngineV2* mLabelingEngineV2;

    bool mActive;
    LayerRenderJobs mLayerJobs;
    bool mRenderSynchronously;
};


#endif // QGSMAPRENDERERCUSTOMPAINTERJOB_H