qgsvectorlayerrenderer.h

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/***************************************************************************
  qgsvectorlayerrenderer.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 QGSVECTORLAYERRENDERER_H
#define QGSVECTORLAYERRENDERER_H

class QgsFeatureRendererV2;
class QgsRenderContext;
class QgsVectorLayer;
class QgsVectorLayerFeatureSource;

class QgsDiagramRendererV2;
class QgsDiagramLayerSettings;

class QgsGeometryCache;
class QgsFeatureIterator;
class QgsSingleSymbolRendererV2;

#include <QList>
#include <QPainter>

typedef QList<int> QgsAttributeList;

#include "qgis.h"
#include "qgsfield.h"  // QgsFields
#include "qgsfeature.h"  // QgsFeatureIds
#include "qgsfeatureiterator.h"
#include "qgsvectorsimplifymethod.h"

#include "qgsmaplayerrenderer.h"

class QgsVectorLayerLabelProvider;
class QgsVectorLayerDiagramProvider;

class QgsVectorLayerRendererInterruptionChecker: public QgsInterruptionChecker
{
  public:
    explicit QgsVectorLayerRendererInterruptionChecker( const QgsRenderContext& context );
    bool mustStop() const override;
  private:
    const QgsRenderContext& mContext;
};

class QgsVectorLayerRenderer : public QgsMapLayerRenderer
{
  public:
    QgsVectorLayerRenderer( QgsVectorLayer* layer, QgsRenderContext& context );
    ~QgsVectorLayerRenderer();

    virtual bool render() override;

    void setGeometryCachePointer( QgsGeometryCache* cache );

  private:

    void prepareLabeling( QgsVectorLayer* layer, QStringList& attributeNames );
    void prepareDiagrams( QgsVectorLayer* layer, QStringList& attributeNames );

    void drawRendererV2( QgsFeatureIterator& fit );

    void drawRendererV2Levels( QgsFeatureIterator& fit );

    void stopRendererV2( QgsSingleSymbolRendererV2* selRenderer );


  protected:

    QgsRenderContext& mContext;

    QgsVectorLayerRendererInterruptionChecker mInterruptionChecker;

    QgsVectorLayer* mLayer;

    QgsFields mFields; // TODO: use fields from mSource

    QgsFeatureIds mSelectedFeatureIds;

    QgsVectorLayerFeatureSource* mSource;

    QgsFeatureRendererV2 *mRendererV2;

    QgsGeometryCache* mCache;

    bool mDrawVertexMarkers;
    bool mVertexMarkerOnlyForSelection;
    int mVertexMarkerStyle, mVertexMarkerSize;

    QGis::GeometryType mGeometryType;

    QStringList mAttrNames;

    bool mLabeling;
    bool mDiagrams;

    QgsVectorLayerLabelProvider* mLabelProvider;
    QgsVectorLayerDiagramProvider* mDiagramProvider;

    QPainter::CompositionMode mFeatureBlendMode;

    QgsVectorSimplifyMethod mSimplifyMethod;
    bool mSimplifyGeometry;
};


#endif // QGSVECTORLAYERRENDERER_H