Esempi in C++ (Cpp) per QgsMapCanvas::setCenter

Esempio n. 1

File: qgsmapcanvasdockwidget.cpp Progetto: Cracert/Quantum-GIS

void QgsMapCanvasDockWidget::syncViewCenter( QgsMapCanvas *sourceCanvas )
{
  // avoid infinite recursion
  mBlockExtentSync = true;

  QgsMapCanvas *destCanvas = sourceCanvas == mMapCanvas ? mMainCanvas : mMapCanvas;

  // reproject extent
  QgsCoordinateTransform ct( sourceCanvas->mapSettings().destinationCrs(),
                             destCanvas->mapSettings().destinationCrs(), QgsProject::instance() );
  try
  {
    destCanvas->setCenter( ct.transform( sourceCanvas->center() ) );
  }
  catch ( QgsCsException & )
  {
    destCanvas->setCenter( sourceCanvas->center() );
  }
  destCanvas->refresh();

  mBlockExtentSync = false;
}