/usr/include/qgis/qgsoverlayobjectpositionmanager.h is in libqgis-dev 1.7.4+1.7.5~20120320-1.1+b1.
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qgsoverlayobjectpositionmanager.h - description
---------------------------------
begin : January 2007
copyright : (C) 2007 by Marco Hugentobler
email : marco dot hugentobler at karto dot baug dot ethz dot 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. *
* *
***************************************************************************/
#ifndef QGSOVERLAYOBJECTPOSITIONMANAGER_H
#define QGSOVERLAYOBJECTPOSITIONMANAGER_H
#include <QList>
#include "qgis.h"
class QgsRenderContext;
class QgsVectorLayer;
class QgsVectorOverlay;
/**Interface for classes that arrange overlay objects of different layers on the map
* \note This class has been added in version 1.1
*/
class QgsOverlayObjectPositionManager
{
public:
//virtual destructor needed for proper memory management
virtual ~QgsOverlayObjectPositionManager() {}
/**Adds a layer that may contain * overlays to the position manager. The overlay objects contained in the
overlays will then be considered in label placement*/
virtual void addLayer( QgsVectorLayer* vl, QList<QgsVectorOverlay*>& overlays ) = 0;
/**Removes all the layers*/
virtual void removeLayers() = 0;
/**Calculate positions for the overlay objects
@param context Context of rendering operation (Painter, scale factor)
@param unitType meters, feet, degrees*/
virtual void findObjectPositions( const QgsRenderContext& context, QGis::UnitType unitType ) = 0;
};
#endif
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