eeschema: fixed:

* crash when creating a sheet that does not yet have a sch file
* when loading schematic file v 1 annotations are applied to all sheets independent of path in hierarchy
* component reference is drawn by default upon placing a new libary comp. 

common/gr_basic.cpp

@@ -62,6 +62,7 @@ static inline int USCALE( us arg, us num, us den )
 
 static int inline ZoomValue( int value_to_zoom ) {
     int zoom = GET_ZOOM;
+	if( !zoom ) return 0; 
 
     if( value_to_zoom >= 0 )
         return ( value_to_zoom + (zoom >> 1 ) ) / zoom;

eeschema/class_drawsheet.cpp

@@ -353,9 +353,9 @@ bool DrawSheetStruct::Load(WinEDA_SchematicFrame* frame)
 			//do not need to load the sub-sheets - this has already been done.
 		}else{
 			m_s = new SCH_SCREEN(SCHEMATIC_FRAME); 
+			m_s->m_RefCount++; 
 			if(!frame->LoadOneEEFile(m_s, m_FileName))
 				return false;
-			m_s->m_RefCount++; 
 			EDA_BaseStruct* bs = m_s->EEDrawList; 
 			while(bs){
 				if(bs->Type() ==  DRAW_SHEET_STRUCT_TYPE){

eeschema/component_class.cpp

@@ -112,6 +112,15 @@ const wxString EDA_SchComponentStruct::GetRef( DrawSheetList* sheet )
 			return m_References[i]; 
 		}
 	}
+	//if it was not found in m_Paths array, then see if it is in
+	// m_Field[REFERENCE] -- if so, use this as a default for this path.
+	// this will happen if we load a version 1 schematic file. 
+	// it will also mean that multiple instances of the same sheet by default
+	// all have the same component references, but perhaps this is best. 
+	if( !m_Field[REFERENCE].m_Text.IsEmpty() ){
+		SetRef( sheet, m_Field[REFERENCE].m_Text ); 
+		return m_Field[REFERENCE].m_Text; 
+	}
 	return m_PrefixString; 
 }
 
@@ -143,6 +152,8 @@ void EDA_SchComponentStruct::SetRef( DrawSheetList* sheet, wxString ref )
 			abs(m_Field[REFERENCE].m_Pos.y - m_Pos.y) > 1000)) {
 		//move it to a reasonable position..
 		m_Field[REFERENCE].m_Pos = m_Pos; 
+		m_Field[REFERENCE].m_Pos.x += 50; //a slight offset..
+		m_Field[REFERENCE].m_Pos.y += 50; 
 	}
 	m_Field[REFERENCE].m_Text = ref; //for drawing. 
 }

eeschema/getpart.cpp

@@ -201,6 +201,8 @@ EDA_SchComponentStruct* WinEDA_SchematicFrame::Load_Component( wxDC* DC,
     if( msg.IsEmpty() )
         msg = wxT( "U" );
     msg += wxT( "?" );
+	//update the reference -- just the prefix for now. 
+	DrawLibItem->SetRef(GetSheet(), msg ); 
 
     /* Init champ Reference */
     DrawLibItem->m_Field[REFERENCE].m_Pos.x =

eeschema/menubar.cpp

@@ -160,12 +160,11 @@ void WinEDA_SchematicFrame::ReCreateMenuBar()
         //TODO: Unify the ID names!
         wxMenu* placeMenu = new wxMenu;
 
-        item = new wxMenuItem(
-            placeMenu,
-            ID_COMPONENT_BUTT,
-            _( "&Component" ),
-            _( "Place the component" )
-            );
+            item = new wxMenuItem(
+                    placeMenu,
+                    ID_COMPONENT_BUTT,
+                    _("&Component"),
+					_("Place a component") );
         item->SetBitmap( add_component_xpm );
         placeMenu->Append( item );
 

eeschema/sheet.cpp

@@ -159,7 +159,7 @@ void WinEDA_SheetPropertiesFrame::CreateControls()
     itemBoxSizer3->Add( itemBoxSizer4, 0, wxALIGN_CENTER_VERTICAL | wxALL, 5 );
 
     wxStaticText* itemStaticText5 = new wxStaticText( itemDialog1, wxID_STATIC, _(
-                                                          "Filename:" ), wxDefaultPosition,
+                                                          "Filename (will be created upon save if it does not already exist):" ), wxDefaultPosition,
                                                       wxDefaultSize, 0 );
     itemBoxSizer4->Add( itemStaticText5,
                         0,
@@ -294,12 +294,9 @@ void WinEDA_SheetPropertiesFrame::SheetPropertiesAccept( wxCommandEvent& event )
 
         if( wxFileExists( FileName ) )//do we reload the data from the existing file
         {
-            msg.Printf( _( "A file named %s exists, load it ?" ), FileName.GetData() );
+            msg.Printf( _( "A file named %s exists, load it (otherwise overwrite it)?" ), FileName.GetData() );
             if( IsOK( this, msg ) )
             {
-				//LoadOneSheet clears the EEDrawList, 
-				//we do not need to delete & recreate the SCH_SCREEN obj
-				m_CurrentSheet->m_FileName = FileName;
 				if( m_CurrentSheet->m_s ){
 					m_CurrentSheet->m_s->m_RefCount--; 
 					if( m_CurrentSheet->m_s->m_RefCount == 0)
@@ -308,7 +305,14 @@ void WinEDA_SheetPropertiesFrame::SheetPropertiesAccept( wxCommandEvent& event )
 				m_CurrentSheet->m_s = NULL; //so that we reload..
 				m_CurrentSheet->Load(m_Parent); 
             }
-        }
+        }else{
+			//just make a new screen if needed. 
+			if( !m_CurrentSheet->m_s ){
+				m_CurrentSheet->m_s = new SCH_SCREEN(SCHEMATIC_FRAME); 
+				m_CurrentSheet->m_s->m_RefCount++; //be careful with these
+				m_CurrentSheet->m_s->m_FileName = FileName; 
+			}
+		}
     }
 
     msg = m_FileNameSize->GetValue();