Save collapsed state for relation editor widgets individually

Author: m-kuhn

src/gui/qgsrelationeditorwidget.cpp

@@ -153,6 +153,9 @@ void QgsRelationEditorWidget::setRelationFeature( const QgsRelation& relation, c
     mToggleEditingButton->setEnabled( false );
   }
 
+  setObjectName( mRelation.name() );
+  loadState();
+
   // If not yet initialized, it is not (yet) visible, so we don't load it to be faster (lazy loading)
   // If it is already initialized, it has been set visible before and the currently shown feature is changing
   // and the widget needs updating
@@ -176,6 +179,14 @@ void QgsRelationEditorWidget::setViewMode( QgsDualView::ViewMode mode )
   mViewMode = mode;
 }
 
+void QgsRelationEditorWidget::setQgisRelation( QString qgisRelationId )
+{
+  mRelationId = qgisRelationId;
+  // by setting the object name appropriately we can properly save the collapsed state
+  setObjectName( qgisRelationId );
+  loadState();
+}
+
 void QgsRelationEditorWidget::referencingLayerEditingToggled()
 {
   bool editable = false;

src/gui/qgsrelationeditorwidget.h

@@ -49,7 +49,7 @@ class GUI_EXPORT QgsRelationEditorWidget : public QgsCollapsibleGroupBox
 
     //! Defines the relation ID (from project relations)
     //! @note use a widget's property to keep compatibility with using basic widget instead of QgsRelationEditorWidget
-    void setQgisRelation( QString qgisRelationId ) { mRelationId = qgisRelationId; }
+    void setQgisRelation( QString qgisRelationId );
     QString qgisRelation() { return mRelationId; }  //property( "qgisRelation" ).toString()
 
     void setRelationFeature( const QgsRelation& relation, const QgsFeature& feature );