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qgssinglebandgrayrenderer.h
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1 /***************************************************************************
2  qgssinglebandgrayrenderer.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 QGSSINGLEBANDGRAYRENDERER_H
19 #define QGSSINGLEBANDGRAYRENDERER_H
20 
21 #include "qgsrasterrenderer.h"
22 
24 class QDomElement;
25 
30 {
31  public:
32  enum Gradient
33  {
35  WhiteToBlack
36  };
37 
38  QgsSingleBandGrayRenderer( QgsRasterInterface* input, int grayBand );
40  QgsRasterInterface * clone() const;
41 
42  static QgsRasterRenderer* create( const QDomElement& elem, QgsRasterInterface* input );
43 
44  QgsRasterBlock *block( int bandNo, QgsRectangle const & extent, int width, int height );
45 
46  int grayBand() const { return mGrayBand; }
47  void setGrayBand( int band ) { mGrayBand = band; }
48  const QgsContrastEnhancement* contrastEnhancement() const { return mContrastEnhancement; }
50  void setContrastEnhancement( QgsContrastEnhancement* ce );
51 
52  void setGradient( Gradient theGradient ) { mGradient = theGradient; }
53  Gradient gradient() const { return mGradient; }
54 
55  void writeXML( QDomDocument& doc, QDomElement& parentElem ) const;
56 
57  void legendSymbologyItems( QList< QPair< QString, QColor > >& symbolItems ) const;
58 
59  QList<int> usesBands() const;
60 
61  private:
62  int mGrayBand;
63  Gradient mGradient;
64  QgsContrastEnhancement* mContrastEnhancement;
65 };
66 
67 #endif // QGSSINGLEBANDGRAYRENDERER_H