Esempio n. 1
0
    void testSnapOnIntersection()
    {
      // testing with a layer with two crossing linestrings
      // (0,1)  x  x (1,1)
      //         \/
      //         /\    .
      // (0,0)  x  x (1,0)
      QgsVectorLayer* vl = new QgsVectorLayer( "LineString", "x", "memory" );
      QgsPolyline polyline1, polyline2;
      polyline1 << QgsPoint( 0, 0 ) << QgsPoint( 1, 1 );
      polyline2 << QgsPoint( 1, 0 ) << QgsPoint( 0, 1 );
      QgsFeature f1;
      QgsGeometry f1g = QgsGeometry::fromPolyline( polyline1 ) ;
      f1.setGeometry( f1g );
      QgsFeature f2;
      QgsGeometry f2g = QgsGeometry::fromPolyline( polyline2 );
      f2.setGeometry( f2g );
      QgsFeatureList flist;
      flist << f1 << f2;
      vl->dataProvider()->addFeatures( flist );

      QVERIFY( vl->dataProvider()->featureCount() == 2 );

      QgsMapSettings mapSettings;
      mapSettings.setOutputSize( QSize( 100, 100 ) );
      mapSettings.setExtent( QgsRectangle( 0, 0, 1, 1 ) );
      QVERIFY( mapSettings.hasValidSettings() );

      QgsSnappingUtils u;
      u.setMapSettings( mapSettings );
      u.setSnapToMapMode( QgsSnappingUtils::SnapAdvanced );
      QList<QgsSnappingUtils::LayerConfig> layers;
      layers << QgsSnappingUtils::LayerConfig( vl, QgsPointLocator::Vertex, 0.1, QgsTolerance::MapUnits );
      u.setLayers( layers );

      // no snapping on intersections by default - should find nothing
      QgsPointLocator::Match m = u.snapToMap( QgsPoint( 0.45, 0.5 ) );
      QVERIFY( !m.isValid() );

      u.setSnapOnIntersections( true );

      QgsPointLocator::Match m2 = u.snapToMap( QgsPoint( 0.45, 0.5 ) );
      QVERIFY( m2.isValid() );
      QCOMPARE( m2.type(), QgsPointLocator::Vertex );
      QCOMPARE( m2.point(), QgsPoint( 0.5, 0.5 ) );

      delete vl;
    }
Esempio n. 2
0
    void testSnapModeAdvanced()
    {
      QgsMapSettings mapSettings;
      mapSettings.setOutputSize( QSize( 100, 100 ) );
      mapSettings.setExtent( QgsRectangle( 0, 0, 1, 1 ) );
      QVERIFY( mapSettings.hasValidSettings() );

      QgsSnappingUtils u;
      u.setMapSettings( mapSettings );
      u.setSnapToMapMode( QgsSnappingUtils::SnapAdvanced );
      QList<QgsSnappingUtils::LayerConfig> layers;
      layers << QgsSnappingUtils::LayerConfig( mVL, QgsPointLocator::Vertex, 10, QgsTolerance::Pixels );
      u.setLayers( layers );

      QgsPointLocator::Match m = u.snapToMap( QPoint( 100, 100 ) );
      QVERIFY( m.isValid() );
      QVERIFY( m.hasVertex() );
      QCOMPARE( m.point(), QgsPoint( 1, 0 ) );

      // test with filtering
      FilterExcludePoint myFilter( QgsPoint( 1, 0 ) );
      QgsPointLocator::Match m2 = u.snapToMap( QPoint( 100, 100 ), &myFilter );
      QVERIFY( !m2.isValid() );
    }