Merge pull request #30213 from m-kuhn/no-projection

Allow setting the default for new projects to "no projection"
qgis · Jun 14, 2019 · e3f141c · e3f141c
2 parents 5347eb7 + 7bcfb8e
commit e3f141c
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Showing 2 changed files with 12 additions and 3 deletions.
diff --git a/src/app/qgsoptions.cpp b/src/app/qgsoptions.cpp
@@ -462,8 +462,15 @@ QgsOptions::QgsOptions( QWidget *parent, Qt::WindowFlags fl, const QList<QgsOpti
   leLayerGlobalCrs->setCrs( mLayerDefaultCrs );
 
   const QString defaultProjectCrs = mSettings->value( QStringLiteral( "/projections/defaultProjectCrs" ), GEO_EPSG_CRS_AUTHID, QgsSettings::App ).toString();
-  leProjectGlobalCrs->setCrs( QgsCoordinateReferenceSystem( defaultProjectCrs ) );
   leProjectGlobalCrs->setOptionVisible( QgsProjectionSelectionWidget::DefaultCrs, false );
+  leProjectGlobalCrs->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, true );
+  leProjectGlobalCrs->setNotSetText( tr( "No projection (or unknown/non-Earth projection)" ) );
+  leProjectGlobalCrs->setCrs( QgsCoordinateReferenceSystem( defaultProjectCrs ) );
+  leProjectGlobalCrs->setMessage(
+    tr( "<h1>Default projection for new projects</h1>"
+        "Select a projection that should be used for new projects that are created in QGIS."
+      ) );
+
   const QgsGui::ProjectCrsBehavior projectCrsBehavior = mSettings->enumValue( QStringLiteral( "/projections/newProjectCrsBehavior" ),  QgsGui::UseCrsOfFirstLayerAdded, QgsSettings::App );
   switch ( projectCrsBehavior )
   {

diff --git a/src/gui/qgsprojectionselectionwidget.cpp b/src/gui/qgsprojectionselectionwidget.cpp
@@ -171,9 +171,11 @@ void QgsProjectionSelectionWidget::selectCrs()
   //find out crs id of current proj4 string
   QgsProjectionSelectionDialog dlg( this );
   dlg.setMessage( mMessage );
-  if ( mCrs.isValid() )
+  dlg.setCrs( mCrs );
+
+  if ( optionVisible( QgsProjectionSelectionWidget::CrsOption::CrsNotSet ) )
   {
-    dlg.setCrs( mCrs );
+    dlg.setShowNoProjection( true );
   }
 
   if ( dlg.exec() )