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qgsgraduatedsymbolrenderer.h
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qgsgraduatedsymbolrenderer.h
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/***************************************************************************
qgsgraduatedsymbolrenderer.h - description
-------------------
begin : Oct 2003
copyright : (C) 2003 by Marco Hugentobler
email : mhugent@geo.unizh.ch
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
/* $Id$ */
#ifndef QGSGRADUATEDSYMBOLRENDERER_H
#define QGSGRADUATEDSYMBOLRENDERER_H
#include <QPixmap>
#include "qgsrenderer.h"
#include "qgsrangerenderitem.h"
#include <list>
#include <iostream>
#include "qgspoint.h"
#include "qpainter.h"
#include "qgsmaptopixel.h"
#include "qgsfeature.h"
#include "qgsvectorlayer.h"
/**This class contains the information for graduate symbol rendering*/
class QgsGraduatedSymbolRenderer: public QgsRenderer
{
public:
QgsGraduatedSymbolRenderer(QGis::VectorType type);
QgsGraduatedSymbolRenderer(const QgsGraduatedSymbolRenderer& other);
QgsGraduatedSymbolRenderer& operator=(const QgsGraduatedSymbolRenderer& other);
virtual ~QgsGraduatedSymbolRenderer();
/**Adds a new item
\param sy a pointer to the QgsSymbol to be inserted. It has to be created using the new operator and is automatically destroyed when 'removeItems' is called or when this object is destroyed*/
void addSymbol(QgsSymbol* sy);
/**Returns the number of the classification field*/
int classificationField() const;
/**Removes all symbols*/
void removeSymbols();
/**Renders an OGRFeature
\param p a painter (usually the one from the current map canvas)
\param f a pointer to a feature to render
\param t the transform object containing the information how to transform the map coordinates to screen coordinates*/
void renderFeature(QPainter* p, QgsFeature* f, QPixmap* pic, double* scalefactor, bool selected, double widthScale = 1.);
/**Sets the number of the classicifation field
\param field the number of the field to classify*/
void setClassificationField(int field);
/**Reads the renderer configuration from an XML file
@param rnode the DOM node to read
@param vl the vector layer which will be associated with the renderer*/
virtual void readXML(const QDomNode& rnode, QgsVectorLayer& vl);
/**Writes the contents of the renderer to a configuration file
@ return true in case of success*/
virtual bool writeXML( QDomNode & layer_node, QDomDocument & document ) const;
/** Returns true*/
bool needsAttributes() const;
/**Returns a list with the index to the classification field*/
std::list<int> classificationAttributes() const;
/**Returns the renderers name*/
QString name() const;
/**Returns the symbols of the items*/
const std::list<QgsSymbol*> symbols() const;
/**Returns a copy of the renderer (a deep copy on the heap)*/
QgsRenderer* clone() const;
protected:
/**Index of the classification field (it must be a numerical field)*/
int mClassificationField;
/**List holding the symbols for the individual classes*/
std::list<QgsSymbol*> mSymbols;
};
inline void QgsGraduatedSymbolRenderer::addSymbol(QgsSymbol* sy)
{
mSymbols.push_back(sy);
}
inline int QgsGraduatedSymbolRenderer::classificationField() const
{
return mClassificationField;
}
inline void QgsGraduatedSymbolRenderer::setClassificationField(int field)
{
mClassificationField=field;
}
inline bool QgsGraduatedSymbolRenderer::needsAttributes() const
{
return true;
}
#endif