Exemplos de QgsMapSettings::mapToLayerCoordinates em C++ (Cpp)

Exemplo n.º 1

Arquivo: qgstolerance.cpp Projeto: NyakudyaA/QGIS

// return ratio [mu/lu] between map units and layer units
// this is of course only an approximation
double _ratioMU2LU( const QgsMapSettings& mapSettings, QgsMapLayer* layer )
{
  double distMU = mapSettings.mapUnitsPerPixel();
  QgsPoint ptMapCenterMU = mapSettings.visibleExtent().center();
  QgsPoint ptMapCenterRightMU( ptMapCenterMU.x() + distMU, ptMapCenterMU.y() );
  QgsPoint ptMapCenterLU = mapSettings.mapToLayerCoordinates( layer, ptMapCenterMU );
  QgsPoint ptMapCenterRightLU = mapSettings.mapToLayerCoordinates( layer, ptMapCenterRightMU );
  double distLU = sqrt( ptMapCenterLU.sqrDist( ptMapCenterRightLU ) );
  double ratio = distMU / distLU;
  return ratio;
}

Exemplo n.º 2

Arquivo: qgstolerance.cpp Projeto: NyakudyaA/QGIS

QgsPoint QgsTolerance::toLayerCoordinates( QgsMapLayer* layer, const QgsMapSettings& mapSettings, QPoint point )
{
  QgsPoint pt = mapSettings.mapToPixel().toMapCoordinates( point );
  return mapSettings.mapToLayerCoordinates( layer, pt );
}