Fixed a crash that happens sometimes when opening the design rule dialog.

preparing auto refresh of the 3D view in mod edit (not yet working)

3d-viewer/3d_frame.cpp

@@ -33,6 +33,7 @@ double       DataScale3D; // 3D conversion units.
 
 
 BEGIN_EVENT_TABLE( WinEDA3D_DrawFrame, wxFrame )
+    EVT_ACTIVATE( WinEDA3D_DrawFrame::OnActivate )
     EVT_TOOL_RANGE( ID_ZOOM_IN, ID_ZOOM_PAGE, WinEDA3D_DrawFrame::Process_Zoom )
     EVT_TOOL_RANGE( ID_START_COMMAND_3D, ID_END_COMMAND_3D,
                     WinEDA3D_DrawFrame::Process_Special_Functions )
@@ -351,6 +352,18 @@ void WinEDA3D_DrawFrame::NewDisplay()
 }
 
 
+void WinEDA3D_DrawFrame::OnActivate( wxActivateEvent& event )
+{
+    // Reload data if 3D frame shows a footprint,
+    // because it can be changed since last frame activation
+    if( m_Parent->m_Ident == MODULE_EDITOR_FRAME )
+    {
+//        NewDisplay();
+    }
+    event.Skip();   // required under wxMAC
+}
+
+
 /* called to set the background color of the 3D scene
  */
 void WinEDA3D_DrawFrame::Set3DBgColor()

3d-viewer/3d_viewer.h

@@ -219,6 +219,7 @@ public:
     void RedrawActiveWindow( wxDC* DC, bool EraseBg );
     void Process_Special_Functions( wxCommandEvent& event );
     void Process_Zoom( wxCommandEvent& event );
+    void OnActivate( wxActivateEvent& event );
 
     void NewDisplay();
     void Set3DBgColor();

pcbnew/dialog_design_rules.cpp

@@ -290,12 +290,15 @@ void DIALOG_DESIGN_RULES::InitDimensionsLists()
 static bool sortByClassThenName( NETCUP* a, NETCUP* b )
 {
     // return a < b
-
     if( a->clazz < b->clazz )
         return true;
 
+    // inside the same class, sort by net name:
+    if( a->clazz == b->clazz )
+    {
         if( a->net < b->net )
             return true;
+    }
 
     return false;
 }