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qgsoverlayobjectpositionmanager.h
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1 /***************************************************************************
2  qgsoverlayobjectpositionmanager.h - description
3  ---------------------------------
4  begin : January 2007
5  copyright : (C) 2007 by Marco Hugentobler
6  email : marco dot hugentobler at karto dot baug dot ethz 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 QGSOVERLAYOBJECTPOSITIONMANAGER_H
19 #define QGSOVERLAYOBJECTPOSITIONMANAGER_H
20 
21 #include <QList>
22 #include "qgis.h"
23 
24 class QgsRenderContext;
25 class QgsVectorLayer;
26 class QgsVectorOverlay;
27 
32 {
33  public:
34  //virtual destructor needed for proper memory management
38  virtual void addLayer( QgsVectorLayer* vl, QList<QgsVectorOverlay*>& overlays ) = 0;
40  virtual void removeLayers() = 0;
44  virtual void findObjectPositions( const QgsRenderContext& context, QGis::UnitType unitType ) = 0;
45 };
46 
47 #endif