QGIS API Documentation  2.5.0-Master
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Modules Pages
qgspalettedrasterrenderer.h
Go to the documentation of this file.
1 /***************************************************************************
2  qgspalettedrasterrenderer.h
3  ---------------------------
4  begin : December 2011
5  copyright : (C) 2011 by Marco Hugentobler
6  email : marco at sourcepole dot ch
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSPALETTEDRASTERRENDERER_H
19 #define QGSPALETTEDRASTERRENDERER_H
20 
21 #include <QVector>
22 
23 #include "qgsrasterrenderer.h"
24 
25 class QColor;
26 class QDomElement;
27 
32 {
33  public:
35  QgsPalettedRasterRenderer( QgsRasterInterface* input, int bandNumber, QColor* colorArray, int nColors, const QVector<QString> labels = QVector<QString>() );
36  QgsPalettedRasterRenderer( QgsRasterInterface* input, int bandNumber, QRgb* colorArray, int nColors, const QVector<QString> labels = QVector<QString>() );
38  QgsRasterInterface * clone() const;
39  static QgsRasterRenderer* create( const QDomElement& elem, QgsRasterInterface* input );
40 
41  QgsRasterBlock *block( int bandNo, const QgsRectangle & extent, int width, int height );
42 
44  int nColors() const { return mNColors; }
46  QColor* colors() const;
47 
51  QRgb* rgbArray() const;
52 
55  QString label( int idx ) const { return mLabels.value( idx ); }
56 
59  void setLabel( int idx, QString label );
60 
61  void writeXML( QDomDocument& doc, QDomElement& parentElem ) const;
62 
63  void legendSymbologyItems( QList< QPair< QString, QColor > >& symbolItems ) const;
64 
65  QList<int> usesBands() const;
66 
67  private:
68  int mBand;
70  QRgb* mColors;
72  int mNColors;
74  QVector<QString> mLabels;
75 };
76 
77 #endif // QGSPALETTEDRASTERRENDERER_H
A rectangle specified with double values.
Definition: qgsrectangle.h:35
QString label(int idx) const
Return optional category label.
Definition: qgspalettedrasterrenderer.h:55
virtual QgsRasterBlock * block(int bandNo, const QgsRectangle &extent, int width, int height)=0
Read block of data using given extent and size.
virtual QList< int > usesBands() const
Returns a list of band numbers used by the renderer.
Definition: qgsrasterrenderer.h:89
Renderer for paletted raster images.
Definition: qgspalettedrasterrenderer.h:31
QgsRasterInterface * clone() const =0
Clone itself, create deep copy.
Raster data container.
Definition: qgsrasterblock.h:32
int nColors() const
Returns number of colors.
Definition: qgspalettedrasterrenderer.h:44
virtual void writeXML(QDomDocument &doc, QDomElement &parentElem) const
Write base class members to xml.
Definition: qgsrasterinterface.h:211
Base class for processing filters like renderers, reprojector, resampler etc.
Definition: qgsrasterinterface.h:35
virtual void legendSymbologyItems(QList< QPair< QString, QColor > > &symbolItems) const
Get symbology items if provided by renderer.
Definition: qgsrasterrenderer.h:83
Raster renderer pipe that applies colors to a raster.
Definition: qgsrasterrenderer.h:34