qgsmaphittest.h

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/***************************************************************************
    qgsmaphittest.h
    ---------------------
    begin                : September 2014
    copyright            : (C) 2014 by Martin Dobias
    email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   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 QGSMAPHITTEST_H
#define QGSMAPHITTEST_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsmapsettings.h"
#include "qgsgeometry.h"
 
#include <QSet>
 
class QgsRenderContext;
class QgsSymbol;
class QgsVectorLayer;
class QgsExpression;
 
class CORE_EXPORT QgsMapHitTest
{
  public:
    typedef QMap<QString, QString> LayerFilterExpression;
 
    QgsMapHitTest( const QgsMapSettings &settings, const QgsGeometry &polygon = QgsGeometry(), const QgsMapHitTest::LayerFilterExpression &layerFilterExpression = QgsMapHitTest::LayerFilterExpression() );
 
    QgsMapHitTest( const QgsMapSettings &settings, const QgsMapHitTest::LayerFilterExpression &layerFilterExpression );
 
    void run();
 
    bool symbolVisible( QgsSymbol *symbol, QgsVectorLayer *layer ) const;
 
    bool legendKeyVisible( const QString &ruleKey, QgsVectorLayer *layer ) const;
 
  private:
 
    typedef QSet<QString> SymbolSet;
 
    typedef QMap<QgsVectorLayer *, SymbolSet> HitTest;
 
    void runHitTestLayer( QgsVectorLayer *vl, SymbolSet &usedSymbols, SymbolSet &usedSymbolsRuleKey, QgsRenderContext &context );
 
    QgsMapSettings mSettings;
 
    HitTest mHitTest;
 
    HitTest mHitTestRuleKey;
 
    QgsMapHitTest::LayerFilterExpression mLayerFilterExpression;
 
    QgsGeometry mPolygon;
 
    bool mOnlyExpressions;
};
 
#endif // QGSMAPHITTEST_H