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qgssinglesymbolrendererv2.h
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1 /***************************************************************************
2  qgssinglesymbolrendererv2.h
3  ---------------------
4  begin : November 2009
5  copyright : (C) 2009 by Martin Dobias
6  email : wonder dot sk at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 #ifndef QGSSINGLESYMBOLRENDERERV2_H
16 #define QGSSINGLESYMBOLRENDERERV2_H
17 
18 #include "qgis.h"
19 #include "qgsrendererv2.h"
20 #include "qgssymbolv2.h"
21 #include "qgsexpression.h"
22 #include <QScopedPointer>
23 
25 {
26  public:
27 
29 
30  virtual ~QgsSingleSymbolRendererV2();
31 
32  virtual QgsSymbolV2* symbolForFeature( QgsFeature& feature );
33 
34  virtual void startRender( QgsRenderContext& context, const QgsFields& fields );
35 
36  virtual void stopRender( QgsRenderContext& context );
37 
38  virtual QList<QString> usedAttributes();
39 
40  QgsSymbolV2* symbol() const;
41  void setSymbol( QgsSymbolV2* s );
42 
44  void setRotationField( QString fieldOrExpression );
46  QString rotationField() const;
47 
49  void setSizeScaleField( QString fieldOrExpression );
51  QString sizeScaleField() const;
52 
54  void setScaleMethod( QgsSymbolV2::ScaleMethod scaleMethod );
56  QgsSymbolV2::ScaleMethod scaleMethod() const { return mScaleMethod; }
57 
58  virtual QString dump() const;
59 
60  virtual QgsFeatureRendererV2* clone();
61 
62  virtual void toSld( QDomDocument& doc, QDomElement &element ) const;
63  static QgsFeatureRendererV2* createFromSld( QDomElement& element, QGis::GeometryType geomType );
64 
67  virtual int capabilities() { return SymbolLevels | RotationField; }
68 
69  virtual QgsSymbolV2List symbols();
70 
72  static QgsFeatureRendererV2* create( QDomElement& element );
73 
75  virtual QDomElement save( QDomDocument& doc );
76 
78  virtual QgsLegendSymbologyList legendSymbologyItems( QSize iconSize );
79 
83  virtual QgsLegendSymbolList legendSymbolItems( double scaleDenominator = -1, QString rule = QString() );
84 
85  protected:
86  QScopedPointer<QgsSymbolV2> mSymbol;
87  QScopedPointer<QgsExpression> mRotation;
88  QScopedPointer<QgsExpression> mSizeScale;
90 
91  // temporary stuff for rendering
92  QScopedPointer<QgsSymbolV2> mTempSymbol;
93  double mOrigSize;
94 };
95 
96 
97 #endif // QGSSINGLESYMBOLRENDERERV2_H
virtual int capabilities()
returns bitwise OR-ed capabilities of the renderer
virtual void setRotationField(QString fieldName)
sets rotation field of renderer (if supported by the renderer)
QList< QgsSymbolV2 * > QgsSymbolV2List
Definition: qgsrendererv2.h:37
virtual QString dump() const
for debugging
virtual QDomElement save(QDomDocument &doc)
store renderer info to XML element
virtual QgsLegendSymbolList legendSymbolItems(double scaleDenominator=-1, QString rule="")
return a list of item text / symbol
QgsSymbolV2::ScaleMethod scaleMethod() const
Container of fields for a vector layer.
Definition: qgsfield.h:163
GeometryType
Definition: qgis.h:155
virtual QList< QString > usedAttributes()=0
QScopedPointer< QgsSymbolV2 > mSymbol
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:113
QgsSymbolV2::ScaleMethod mScaleMethod
virtual QgsLegendSymbologyList legendSymbologyItems(QSize iconSize)
return a list of symbology items for the legend
virtual void startRender(QgsRenderContext &context, const QgsFields &fields)=0
virtual void stopRender(QgsRenderContext &context)=0
virtual QString rotationField() const
return rotation field name (or empty string if not set or not supported by renderer) ...
virtual QgsSymbolV2List symbols()=0
for symbol levels
virtual QgsFeatureRendererV2 * clone()=0
QScopedPointer< QgsExpression > mSizeScale
QList< QPair< QString, QPixmap > > QgsLegendSymbologyList
virtual void toSld(QDomDocument &doc, QDomElement &element) const
used from subclasses to create SLD Rule elements following SLD v1.1 specs
Contains information about the context of a rendering operation.
QList< QPair< QString, QgsSymbolV2 * > > QgsLegendSymbolList
Definition: qgsrendererv2.h:41
virtual QgsSymbolV2 * symbolForFeature(QgsFeature &feature)=0
to be overridden
QScopedPointer< QgsSymbolV2 > mTempSymbol
QScopedPointer< QgsExpression > mRotation