void QgsMapMouseEvent::snapPoint()
{
if ( mSnappingMode == NoSnapping )
return;
QgsSnappingUtils* snappingUtils = mMapTool->canvas()->snappingUtils();
QgsSnappingUtils::SnapToMapMode canvasMode = snappingUtils->snapToMapMode();
if ( mSnappingMode == SnapAllLayers )
{
int type;
double tolerance;
QgsTolerance::UnitType unit;
snappingUtils->defaultSettings( type, tolerance, unit );
snappingUtils->setSnapToMapMode( QgsSnappingUtils::SnapAllLayers );
snappingUtils->setDefaultSettings( QgsPointLocator::Vertex | QgsPointLocator::Edge, tolerance, unit );
mSnapMatch = snappingUtils->snapToMap( mMapPoint );
snappingUtils->setSnapToMapMode( canvasMode );
snappingUtils->setDefaultSettings( type, tolerance, unit );
}
else
{
mSnapMatch = snappingUtils->snapToMap( mMapPoint );
}
mMapPoint = mSnapMatch.isValid() ? mSnapMatch.point() : mOriginalPoint;
}
void QgsMapToolOffsetCurve::canvasPressEvent( QMouseEvent* e )
{
deleteRubberBandAndGeometry();
mGeometryModified = false;
mForceCopy = false;
if ( !mCanvas )
{
return;
}
//get selected features or snap to nearest feature if no selection
QgsVectorLayer* layer = currentVectorLayer();
if ( !layer )
{
notifyNotVectorLayer();
return;
}
QgsSnappingUtils* snapping = mCanvas->snappingUtils();
// store previous settings
int oldType;
double oldSearchRadius;
QgsTolerance::UnitType oldSearchRadiusUnit;
QgsSnappingUtils::SnapToMapMode oldMode = snapping->snapToMapMode();
snapping->defaultSettings( oldType, oldSearchRadius, oldSearchRadiusUnit );
// setup new settings (temporary)
QSettings settings;
snapping->setSnapToMapMode( QgsSnappingUtils::SnapAllLayers );
snapping->setDefaultSettings( QgsPointLocator::Edge,
settings.value( "/Qgis/digitizing/search_radius_vertex_edit", 10 ).toDouble(),
( QgsTolerance::UnitType ) settings.value( "/Qgis/digitizing/search_radius_vertex_edit_unit", QgsTolerance::Pixels ).toInt() );
QgsPointLocator::Match match = snapping->snapToMap( e->pos() );
// restore old settings
snapping->setSnapToMapMode( oldMode );
snapping->setDefaultSettings( oldType, oldSearchRadius, oldSearchRadiusUnit );
if ( match.hasEdge() && match.layer() )
{
mSourceLayerId = match.layer()->id();
QgsFeature fet;
if ( match.layer()->getFeatures( QgsFeatureRequest( match.featureId() ) ).nextFeature( fet ) )
{
mForceCopy = ( e->modifiers() & Qt::ControlModifier ); //no geometry modification if ctrl is pressed
mOriginalGeometry = createOriginGeometry( match.layer(), match, fet );
mRubberBand = createRubberBand();
if ( mRubberBand )
{
mRubberBand->setToGeometry( mOriginalGeometry, layer );
}
mModifiedFeature = fet.id();
createDistanceItem();
}
}
}
QList<QgsPoint> QgsMapMouseEvent::snapSegment( SnappingMode snappingMode, bool* snapped , bool allLayers ) const
{
QList<QgsPoint> segment;
QgsPoint pt1, pt2;
// If there's a cached snapping result we use it
if ( snappingMode == mSnappingMode && mSnapMatch.hasEdge() )
{
mSnapMatch.edgePoints( pt1, pt2 );
segment << pt1 << pt2;
}
else if ( snappingMode != NoSnapping )
{
QgsPointLocator::Match match;
if ( snappingMode == SnapProjectConfig && !allLayers )
{
// run snapToMap with only segments
EdgesOnlyFilter filter;
match = mMapCanvas->snappingUtils()->snapToMap( mOriginalMapPoint, &filter );
}
else if ( snappingMode == SnapAllLayers || allLayers )
{
// run snapToMap with only edges on all layers
QgsSnappingUtils* snappingUtils = mMapCanvas->snappingUtils();
QgsSnappingUtils::SnapToMapMode canvasMode = snappingUtils->snapToMapMode();
int type;
double tolerance;
QgsTolerance::UnitType unit;
snappingUtils->defaultSettings( type, tolerance, unit );
snappingUtils->setSnapToMapMode( QgsSnappingUtils::SnapAllLayers );
snappingUtils->setDefaultSettings( QgsPointLocator::Edge, tolerance, unit );
match = snappingUtils->snapToMap( mOriginalMapPoint );
snappingUtils->setSnapToMapMode( canvasMode );
snappingUtils->setDefaultSettings( type, tolerance, unit );
}
if ( match.isValid() && match.hasEdge() )
{
match.edgePoints( pt1, pt2 );
segment << pt1 << pt2;
}
}
if ( snapped )
{
*snapped = segment.count() == 2;
}
return segment;
}
QgsPoint QgsMapMouseEvent::snapPoint( SnappingMode snappingMode )
{
// Use cached result
if ( mSnappingMode == snappingMode )
return mMapPoint;
mSnappingMode = snappingMode;
if ( snappingMode == NoSnapping )
{
mMapPoint = mOriginalMapPoint;
mPixelPoint = pos();
return mMapPoint;
}
QgsSnappingUtils* snappingUtils = mMapCanvas->snappingUtils();
QgsSnappingUtils::SnapToMapMode canvasMode = snappingUtils->snapToMapMode();
if ( snappingMode == SnapAllLayers )
{
int type;
double tolerance;
QgsTolerance::UnitType unit;
snappingUtils->defaultSettings( type, tolerance, unit );
snappingUtils->setSnapToMapMode( QgsSnappingUtils::SnapAllLayers );
snappingUtils->setDefaultSettings( QgsPointLocator::Vertex | QgsPointLocator::Edge, tolerance, unit );
mSnapMatch = snappingUtils->snapToMap( mMapPoint );
snappingUtils->setSnapToMapMode( canvasMode );
snappingUtils->setDefaultSettings( type, tolerance, unit );
}
else
{
mSnapMatch = snappingUtils->snapToMap( mMapPoint );
}
if ( mSnapMatch.isValid() )
{
mMapPoint = mSnapMatch.point();
mPixelPoint = mapToPixelCoordinates( mMapPoint );
}
else
{
mMapPoint = mOriginalMapPoint;
mPixelPoint = pos();
}
return mMapPoint;
}
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() );
}
void testSnapModeAll()
{
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::SnapAllLayers );
// right now there are no layers in map settings - snapping will fail
QgsPointLocator::Match m = u.snapToMap( QPoint( 100, 100 ) );
QVERIFY( !m.isValid() );
// now check with our layer
mapSettings.setLayers( QStringList() << mVL->id() );
u.setMapSettings( mapSettings );
QgsPointLocator::Match m2 = u.snapToMap( QPoint( 100, 100 ) );
QVERIFY( m2.isValid() );
QCOMPARE( m2.point(), QgsPoint( 1, 0 ) );
}