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;
}
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() );
}
