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src
core
qgscentralpointpositionmanager.h
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/***************************************************************************
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qgscentralpointpositionmanager.h - description
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--------------------------------
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begin : January 2007
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copyright : (C) 2007 by Marco Hugentobler
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email : marco dot hugentobler at karto dot baug dot ethz dot ch
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSCENTRALPOINTPOSITIONMANAGER
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#define QGSCENTRALPOINTPOSITIONMANAGER
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#include "
qgsoverlayobjectpositionmanager.h
"
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#include "
qgsrendercontext.h
"
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class
QgsPoint
;
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class
QgsCentralPointPositionManager
:
public
QgsOverlayObjectPositionManager
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{
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public
:
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QgsCentralPointPositionManager
();
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~QgsCentralPointPositionManager
();
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void
addLayer
(
QgsVectorLayer
* vl, QList<QgsVectorOverlay*>& overlays );
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void
removeLayers
();
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void
findObjectPositions
(
const
QgsRenderContext
& context,
QGis::UnitType
unitType );
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private
:
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int
findObjectPosition
(
const
unsigned
char
* wkb,
QgsPoint
& position )
const
;
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int
calculatePolygonCentroid
(
double
x[],
double
y[],
int
numberOfPoints,
double
& centroidX,
double
& centroidY )
const
;
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QList<QgsVectorOverlay*>
mOverlays
;
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};
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#endif
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