qgsmapsettings.h

Go to the documentation of this file.

/***************************************************************************
  qgsmapsettings.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 QGSMAPSETTINGS_H
#define QGSMAPSETTINGS_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include <QColor>
#include <QImage>
#include <QPointer>
#include <QSize>
#include <QStringList>
 
#include "qgscoordinatereferencesystem.h"
#include "qgslabelingenginesettings.h"
#include "qgsmaptopixel.h"
#include "qgsrectangle.h"
#include "qgsscalecalculator.h"
#include "qgsexpressioncontext.h"
#include "qgsmaplayer.h"
#include "qgsgeometry.h"
#include "qgstemporalrangeobject.h"
#include "qgsmapclippingregion.h"
 
class QPainter;
 
class QgsCoordinateTransform;
class QgsScaleCalculator;
class QgsMapRendererJob;
class QgsRenderedFeatureHandlerInterface;
 
class CORE_EXPORT QgsLabelBlockingRegion
{
  public:
 
    explicit QgsLabelBlockingRegion( const QgsGeometry &geometry )
      : geometry( geometry )
    {}
 
    QgsGeometry geometry;
 
};
 
 
class CORE_EXPORT QgsMapSettings : public QgsTemporalRangeObject
{
  public:
    QgsMapSettings();
 
    QgsRectangle extent() const;
 
    void setExtent( const QgsRectangle &rect, bool magnified = true );
 
    double extentBuffer() const;
 
    void setExtentBuffer( double buffer );
 
    QSize outputSize() const;
    void setOutputSize( QSize size );
 
    float devicePixelRatio() const;
 
    void setDevicePixelRatio( float dpr );
 
    QSize deviceOutputSize() const;
 
    double rotation() const;
 
    void setRotation( double rotation );
 
    double outputDpi() const;
    void setOutputDpi( double dpi );
 
    void setMagnificationFactor( double factor, const QgsPointXY *center = nullptr );
 
    double magnificationFactor() const;
 
    QStringList layerIds() const;
 
    QList<QgsMapLayer *> layers() const;
 
    void setLayers( const QList<QgsMapLayer *> &layers );
 
    QMap<QString, QString> layerStyleOverrides() const;
 
    void setLayerStyleOverrides( const QMap<QString, QString> &overrides );
 
    Q_DECL_DEPRECATED QString customRenderFlags() const { return mCustomRenderFlags; }
 
    Q_DECL_DEPRECATED void setCustomRenderFlags( const QString &customRenderFlags ) { mCustomRenderFlags = customRenderFlags; }
 
    QVariantMap customRenderingFlags() const { return mCustomRenderingFlags; }
 
    void setCustomRenderingFlag( const QString &flag, const QVariant &value ) { mCustomRenderingFlags[flag] = value; }
 
    void clearCustomRenderingFlag( const QString &flag ) { mCustomRenderingFlags.remove( flag ); }
 
    void setDestinationCrs( const QgsCoordinateReferenceSystem &crs );
    QgsCoordinateReferenceSystem destinationCrs() const;
 
    QgsUnitTypes::DistanceUnit mapUnits() const;
 
    bool setEllipsoid( const QString &ellipsoid );
 
    QString ellipsoid() const { return mEllipsoid; }
 
    void setBackgroundColor( const QColor &color ) { mBackgroundColor = color; }
    QColor backgroundColor() const { return mBackgroundColor; }
 
    void setSelectionColor( const QColor &color ) { mSelectionColor = color; }
    QColor selectionColor() const { return mSelectionColor; }
 
    enum Flag
    {
      Antialiasing             = 0x01,  
      DrawEditingInfo          = 0x02,  
      ForceVectorOutput        = 0x04,  
      UseAdvancedEffects       = 0x08,  
      DrawLabeling             = 0x10,  
      UseRenderingOptimization = 0x20,  
      DrawSelection            = 0x40,  
      DrawSymbolBounds         = 0x80,  
      RenderMapTile            = 0x100, 
      RenderPartialOutput      = 0x200, 
      RenderPreviewJob         = 0x400, 
      RenderBlocking           = 0x800, 
      LosslessImageRendering   = 0x1000, 
      Render3DMap              = 0x2000, 
      // TODO: ignore scale-based visibility (overview)
    };
    Q_DECLARE_FLAGS( Flags, Flag )
 
    
    void setFlags( QgsMapSettings::Flags flags );
    void setFlag( Flag flag, bool on = true );
    Flags flags() const;
    bool testFlag( Flag flag ) const;
 
    QgsRenderContext::TextRenderFormat textRenderFormat() const
    {
      return mTextRenderFormat;
    }
 
    void setTextRenderFormat( QgsRenderContext::TextRenderFormat format )
    {
      mTextRenderFormat = format;
      // ensure labeling engine setting is also kept in sync, just in case anyone accesses QgsMapSettings::labelingEngineSettings().defaultTextRenderFormat()
      // instead of correctly calling QgsMapSettings::textRenderFormat(). It can't hurt to be consistent!
      mLabelingEngineSettings.setDefaultTextRenderFormat( format );
    }
 
    void setOutputImageFormat( QImage::Format format ) { mImageFormat = format; }
    QImage::Format outputImageFormat() const { return mImageFormat; }
 
    bool hasValidSettings() const;
    QgsRectangle visibleExtent() const;
 
    QPolygonF visiblePolygon() const;
    double mapUnitsPerPixel() const;
 
    double scale() const;
 
    void setExpressionContext( const QgsExpressionContext &context ) { mExpressionContext = context; }
 
    const QgsExpressionContext &expressionContext() const { return mExpressionContext; }
 
    QgsCoordinateTransformContext transformContext() const;
 
    void setTransformContext( const QgsCoordinateTransformContext &context );
 
    const QgsPathResolver &pathResolver() const { return mPathResolver; }
 
    void setPathResolver( const QgsPathResolver &resolver ) { mPathResolver = resolver; }
 
    const QgsMapToPixel &mapToPixel() const { return mMapToPixel; }
 
    double layerToMapUnits( const QgsMapLayer *layer, const QgsRectangle &referenceExtent = QgsRectangle() ) const;
 
    QgsRectangle layerExtentToOutputExtent( const QgsMapLayer *layer, QgsRectangle extent ) const;
 
    QgsRectangle outputExtentToLayerExtent( const QgsMapLayer *layer, QgsRectangle extent ) const;
 
    QgsPointXY layerToMapCoordinates( const QgsMapLayer *layer, QgsPointXY point ) const;
 
    QgsPoint layerToMapCoordinates( const QgsMapLayer *layer, const QgsPoint &point ) const;
 
    QgsRectangle layerToMapCoordinates( const QgsMapLayer *layer, QgsRectangle rect ) const;
 
    QgsPointXY mapToLayerCoordinates( const QgsMapLayer *layer, QgsPointXY point ) const;
 
    QgsPoint mapToLayerCoordinates( const QgsMapLayer *layer, const QgsPoint &point ) const;
 
    QgsRectangle mapToLayerCoordinates( const QgsMapLayer *layer, QgsRectangle rect ) const;
 
    QgsCoordinateTransform layerTransform( const QgsMapLayer *layer ) const;
 
    QgsRectangle fullExtent() const;
 
    /* serialization */
 
    void readXml( QDomNode &node );
 
    void writeXml( QDomNode &node, QDomDocument &doc );
 
    void setSegmentationTolerance( double tolerance ) { mSegmentationTolerance = tolerance; }
    double segmentationTolerance() const { return mSegmentationTolerance; }
 
    void setSegmentationToleranceType( QgsAbstractGeometry::SegmentationToleranceType type ) { mSegmentationToleranceType = type; }
    QgsAbstractGeometry::SegmentationToleranceType segmentationToleranceType() const { return mSegmentationToleranceType; }
 
    void setLabelingEngineSettings( const QgsLabelingEngineSettings &settings )
    {
      mLabelingEngineSettings = settings;
      mTextRenderFormat = settings.defaultTextRenderFormat();
    }
 
    const QgsLabelingEngineSettings &labelingEngineSettings() const { return mLabelingEngineSettings; }
 
    QgsGeometry labelBoundaryGeometry() const;
 
    void setLabelBoundaryGeometry( const QgsGeometry &boundary );
 
    void setLabelBlockingRegions( const QList< QgsLabelBlockingRegion > &regions ) { mLabelBlockingRegions = regions; }
 
    QList< QgsLabelBlockingRegion > labelBlockingRegions() const { return mLabelBlockingRegions; }
 
    void addClippingRegion( const QgsMapClippingRegion &region );
 
    void setClippingRegions( const QList< QgsMapClippingRegion > &regions );
 
    QList< QgsMapClippingRegion > clippingRegions() const;
 
    void setSimplifyMethod( const QgsVectorSimplifyMethod &method ) { mSimplifyMethod = method; }
 
    const QgsVectorSimplifyMethod &simplifyMethod() const { return mSimplifyMethod; }
 
    void addRenderedFeatureHandler( QgsRenderedFeatureHandlerInterface *handler );
 
    QList< QgsRenderedFeatureHandlerInterface * > renderedFeatureHandlers() const;
 
  protected:
 
    double mDpi;
 
    QSize mSize;
    float mDevicePixelRatio = 1.0;
 
    QgsRectangle mExtent;
    double mExtentBuffer = 0.0;
 
    double mRotation = 0.0;
    double mMagnificationFactor = 1.0;
 
    QgsWeakMapLayerPointerList mLayers;
    QMap<QString, QString> mLayerStyleOverrides;
    QString mCustomRenderFlags;
    QVariantMap mCustomRenderingFlags;
    QgsExpressionContext mExpressionContext;
 
    QgsCoordinateReferenceSystem mDestCRS;
    QString mEllipsoid;
 
    QColor mBackgroundColor;
    QColor mSelectionColor;
 
    Flags mFlags;
 
    QImage::Format mImageFormat = QImage::Format_ARGB32_Premultiplied;
 
    double mSegmentationTolerance;
    QgsAbstractGeometry::SegmentationToleranceType mSegmentationToleranceType = QgsAbstractGeometry::MaximumAngle;
 
    QgsLabelingEngineSettings mLabelingEngineSettings;
 
    // derived properties
    bool mValid = false; 
    QgsRectangle mVisibleExtent; 
    double mMapUnitsPerPixel = 1;
    double mScale = 1;
 
    // utiity stuff
    QgsScaleCalculator mScaleCalculator;
    QgsMapToPixel mMapToPixel;
 
    QgsCoordinateTransformContext mTransformContext;
 
    QgsPathResolver mPathResolver;
 
    QgsRenderContext::TextRenderFormat mTextRenderFormat = QgsRenderContext::TextFormatAlwaysOutlines;
 
    QgsGeometry mLabelBoundaryGeometry;
 
    QgsVectorSimplifyMethod mSimplifyMethod;
 
#ifdef QGISDEBUG
    bool mHasTransformContext = false;
#endif
 
    void updateDerived();
 
  private:
 
    QList< QgsLabelBlockingRegion > mLabelBlockingRegions;
    QList< QgsMapClippingRegion > mClippingRegions;
    QList< QgsRenderedFeatureHandlerInterface * > mRenderedFeatureHandlers;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QgsMapSettings::Flags )
 
 
#endif // QGSMAPSETTINGS_H