Quantum GIS API Documentation
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00001 /*************************************************************************** 00002 qgsgraduatedsymbolrenderer.h - description 00003 ------------------- 00004 begin : Oct 2003 00005 copyright : (C) 2003 by Marco Hugentobler 00006 email : [email protected] 00007 ***************************************************************************/ 00008 00009 /*************************************************************************** 00010 * * 00011 * This program is free software; you can redistribute it and/or modify * 00012 * it under the terms of the GNU General Public License as published by * 00013 * the Free Software Foundation; either version 2 of the License, or * 00014 * (at your option) any later version. * 00015 * * 00016 ***************************************************************************/ 00017 00018 #ifndef QGSGRADUATEDSYMBOLRENDERER_H 00019 #define QGSGRADUATEDSYMBOLRENDERER_H 00020 00021 #include "qgsrenderer.h" 00022 00023 class QgsVectorLayer; 00024 00026 class CORE_EXPORT QgsGraduatedSymbolRenderer: public QgsRenderer 00027 { 00028 public: 00029 enum Mode 00030 { 00031 EqualInterval, 00032 Quantile, 00033 Empty 00034 }; 00035 QgsGraduatedSymbolRenderer( QGis::GeometryType type, Mode theMode = EqualInterval ); 00036 QgsGraduatedSymbolRenderer( const QgsGraduatedSymbolRenderer& other ); 00037 QgsGraduatedSymbolRenderer& operator=( const QgsGraduatedSymbolRenderer& other ); 00038 virtual ~QgsGraduatedSymbolRenderer(); 00039 00045 Mode mode() const; 00046 00052 void setMode( Mode theMode ); 00053 00056 void addSymbol( QgsSymbol* sy ); 00057 00059 int classificationField() const; 00060 00062 void removeSymbols(); 00063 00066 virtual bool willRenderFeature( QgsFeature *f ); 00067 00075 void renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* img, bool selected, double opacity = 1.0 ); 00076 00079 void setClassificationField( int field ); 00080 00086 virtual int readXML( const QDomNode& rnode, QgsVectorLayer& vl ); 00087 00090 virtual bool writeXML( QDomNode & layer_node, QDomDocument & document, const QgsVectorLayer& vl ) const; 00091 00093 bool needsAttributes() const; 00094 00096 QgsAttributeList classificationAttributes() const; 00097 00098 void updateSymbolAttributes(); 00099 00101 QString name() const; 00102 00104 const QList<QgsSymbol*> symbols() const; 00105 00107 QgsRenderer* clone() const; 00108 00109 QgsSymbol *symbolForFeature( const QgsFeature* f ); 00110 00111 protected: 00113 Mode mMode; 00114 00116 int mClassificationField; 00117 00119 QList<QgsSymbol*> mSymbols; 00120 00122 QgsAttributeList mSymbolAttributes; 00123 }; 00124 00125 inline void QgsGraduatedSymbolRenderer::addSymbol( QgsSymbol* sy ) 00126 { 00127 mSymbols.push_back( sy ); 00128 } 00129 00130 inline int QgsGraduatedSymbolRenderer::classificationField() const 00131 { 00132 return mClassificationField; 00133 } 00134 00135 inline void QgsGraduatedSymbolRenderer::setClassificationField( int index ) 00136 { 00137 mClassificationField = index; 00138 } 00139 00140 inline bool QgsGraduatedSymbolRenderer::needsAttributes() const 00141 { 00142 return true; 00143 } 00144 00145 00146 #endif