Exemplo n.º 1
0
    void testSnapModeCurrent()
    {
      QgsMapSettings mapSettings;
      mapSettings.setOutputSize( QSize( 100, 100 ) );
      mapSettings.setExtent( QgsRectangle( 0, 0, 1, 1 ) );
      QVERIFY( mapSettings.hasValidSettings() );

      QgsSnappingUtils u;
      u.setMapSettings( mapSettings );
      u.setCurrentLayer( mVL );

      // first try with no snapping enabled
      QgsSnappingConfig snappingConfig = u.config();
      snappingConfig.setEnabled( false );
      snappingConfig.setTolerance( 10 );
      snappingConfig.setUnits( QgsTolerance::Pixels );
      snappingConfig.setMode( QgsSnappingConfig::ActiveLayer );
      u.setConfig( snappingConfig );

      QgsPointLocator::Match m0 = u.snapToMap( QPoint( 100, 100 ) );
      QVERIFY( !m0.isValid() );
      QVERIFY( !m0.hasVertex() );

      // now enable snapping
      snappingConfig.setEnabled( true );
      snappingConfig.setType( QgsSnappingConfig::Vertex );
      u.setConfig( snappingConfig );

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

      QgsPointLocator::Match m2 = u.snapToMap( QPoint( 0, 100 ) );
      QVERIFY( !m2.isValid() );
      QVERIFY( !m2.hasVertex() );

      // do not consider edges in the following test - on 32-bit platforms
      // result was an edge match very close to (1,0) instead of being exactly (1,0)

      snappingConfig.setType( QgsSnappingConfig::Vertex );
      u.setConfig( snappingConfig );

      // test with filtering
      FilterExcludePoint myFilter( QgsPoint( 1, 0 ) );
      QgsPointLocator::Match m3 = u.snapToMap( QPoint( 100, 100 ), &myFilter );
      QVERIFY( !m3.isValid() );
    }
QList<QgsPointXY> QgsAdvancedDigitizingDockWidget::snapSegmentToAllLayers( const QgsPointXY &originalMapPoint, bool *snapped ) const
{
  QList<QgsPointXY> segment;
  QgsPointXY pt1, pt2;
  QgsPointLocator::Match match;

  QgsSnappingUtils *snappingUtils = mMapCanvas->snappingUtils();

  QgsSnappingConfig canvasConfig = snappingUtils->config();
  QgsSnappingConfig localConfig = snappingUtils->config();

  localConfig.setMode( QgsSnappingConfig::AllLayers );
  localConfig.setType( QgsSnappingConfig::Segment );
  snappingUtils->setConfig( localConfig );

  match = snappingUtils->snapToMap( originalMapPoint );

  snappingUtils->setConfig( canvasConfig );

  if ( match.isValid() && match.hasEdge() )
  {
    match.edgePoints( pt1, pt2 );
    segment << pt1 << pt2;
  }

  if ( snapped )
  {
    *snapped = segment.count() == 2;
  }

  return segment;
}