Support text expansion in dimensions

pcbnew/class_dimension.cpp

@@ -50,13 +50,20 @@ DIMENSION::DIMENSION( BOARD_ITEM* aParent ) :
         m_extensionOffset( 0 ),
         m_textPosition( DIM_TEXT_POSITION::OUTSIDE ),
         m_keepTextAligned( true ),
-        m_text( this ),
+        m_text( aParent ),
         m_measuredValue( 0 )
 {
     m_Layer = Dwgs_User;
 }
 
 
+void DIMENSION::SetParent( EDA_ITEM* aParent )
+{
+    BOARD_ITEM::SetParent( aParent );
+    m_text.SetParent( aParent );
+}
+
+
 void DIMENSION::SetPosition( const wxPoint& aPos )
 {
     m_text.SetTextPos( aPos );

pcbnew/class_dimension.h

@@ -92,6 +92,8 @@ class DIMENSION : public BOARD_ITEM
 public:
     DIMENSION( BOARD_ITEM* aParent );
 
+    void SetParent( EDA_ITEM* aParent ) override;
+
     /**
      * The dimension's origin is the first feature point for the dimension.  Every dimension has
      * one or more feature points, so every dimension has at least an origin.

pcbnew/class_pcb_text.cpp

@@ -50,8 +50,7 @@ TEXTE_PCB::~TEXTE_PCB()
 
 wxString TEXTE_PCB::GetShownText( int aDepth ) const
 {
-    BOARD* board = static_cast<BOARD*>( GetParent() );
-    wxASSERT( board );
+    BOARD* board = dynamic_cast<BOARD*>( GetParent() );
 
     std::function<bool( wxString* )> pcbTextResolver =
             [&]( wxString* token ) -> bool
@@ -91,7 +90,7 @@ wxString TEXTE_PCB::GetShownText( int aDepth ) const
     bool     processTextVars = false;
     wxString text = EDA_TEXT::GetShownText( &processTextVars );
 
-    if( processTextVars && aDepth < 10 )
+    if( board && processTextVars && aDepth < 10 )
         text = ExpandTextVars( text, &pcbTextResolver, board->GetProject(), &boardTextResolver );
 
     return text;

pcbnew/dialogs/dialog_dimension_properties.cpp

@@ -46,6 +46,7 @@ DIALOG_DIMENSION_PROPERTIES::DIALOG_DIMENSION_PROPERTIES( PCB_BASE_EDIT_FRAME* a
     wxASSERT( aItem->Type() == PCB_DIMENSION_T );
     m_dimension = static_cast<DIMENSION*>( aItem );
     m_previewDimension = static_cast<DIMENSION*>( m_dimension->Clone() );
+    m_previewDimension->SetParent( m_frame->GetBoard() );
 
     // Configure display origin transforms
     m_textPosX.SetCoordType( ORIGIN_TRANSFORMS::ABS_X_COORD );

pcbnew/pcb_painter.cpp

@@ -1296,7 +1296,7 @@ void PCB_PAINTER::draw( const DIMENSION* aDimension, int aLayer )
     }
 
     m_gal->SetTextAttributes( &text );
-    m_gal->StrokeText( aDimension->GetText(), position, text.GetTextAngleRadians() );
+    m_gal->StrokeText( text.GetShownText(), position, text.GetTextAngleRadians() );
 }