Resolve variables in Sheet Properties dialog's sheet path.

Fixes https://gitlab.com/kicad/code/kicad/issues/6409

eeschema/dialogs/dialog_sheet_properties.cpp

@@ -44,7 +44,9 @@ DIALOG_SHEET_PROPERTIES::DIALOG_SHEET_PROPERTIES( SCH_EDIT_FRAME* aParent, SCH_S
     DIALOG_SHEET_PROPERTIES_BASE( aParent ),
     m_frame( aParent ),
     m_clearAnnotationNewItems( aClearAnnotationNewItems ),
-    m_borderWidth( aParent, m_borderWidthLabel, m_borderWidthCtrl, m_borderWidthUnits, true )
+    m_borderWidth( aParent, m_borderWidthLabel, m_borderWidthCtrl, m_borderWidthUnits, true ),
+    m_dummySheet( *aSheet ),
+    m_dummySheetNameField( wxDefaultPosition, SHEETNAME, &m_dummySheet )
 {
     m_sheet = aSheet;
     m_fields = new FIELDS_GRID_TABLE<SCH_FIELD>( this, aParent, m_sheet );
@@ -776,11 +778,16 @@ void DIALOG_SHEET_PROPERTIES::OnUpdateUI( wxUpdateUIEvent& event )
     wxGridCellEditor* editor = m_grid->GetCellEditor( SHEETNAME, FDC_VALUE );
     wxControl*        control = editor->GetControl();
     wxTextEntry*      textControl = dynamic_cast<wxTextEntry*>( control );
+    wxString          sheetName;
 
     if( textControl )
-        hierarchicalPath += textControl->GetValue();
+        sheetName = textControl->GetValue();
     else
-        hierarchicalPath += m_grid->GetCellValue( SHEETNAME, FDC_VALUE );
+        sheetName = m_grid->GetCellValue( SHEETNAME, FDC_VALUE );
+
+    m_dummySheet.SetFields( *m_fields );
+    m_dummySheetNameField.SetText( sheetName );
+    hierarchicalPath += m_dummySheetNameField.GetShownText();
 
     editor->DecRef();
 

eeschema/dialogs/dialog_sheet_properties.h

@@ -28,7 +28,7 @@
 #include <fields_grid_table.h>
 #include <widgets/unit_binder.h>
 #include <dialog_sheet_properties_base.h>
-
+#include <sch_sheet.h>
 
 class SCH_SHEET;
 class SCH_EDIT_FRAME;
@@ -55,6 +55,9 @@ private:
     FIELDS_GRID_TABLE<SCH_FIELD>* m_fields;
     UNIT_BINDER                   m_borderWidth;
 
+    SCH_SHEET                     m_dummySheet;
+    SCH_FIELD                     m_dummySheetNameField;
+
     bool onSheetFilenameChanged( const wxString& aNewFilename );
 
     bool TransferDataToWindow() override;