diff -r 4ce166451816 -r 37ba389e5c01 graphics/LD_Objects.py
--- a/graphics/LD_Objects.py	Sun Oct 09 23:31:13 2011 +0200
+++ b/graphics/LD_Objects.py	Sun Oct 09 23:31:50 2011 +0200
@@ -354,7 +354,7 @@
         self.Name = name
         self.Id = id
         self.Size = wx.Size(LD_ELEMENT_SIZE[0], LD_ELEMENT_SIZE[1])
-        self.Errors = {}
+        self.Highlights = {}
         # Create an input and output connector
         self.Input = Connector(self, "", "BOOL", wx.Point(0, self.Size[1] / 2 + 1), WEST)
         self.Output = Connector(self, "", "BOOL", wx.Point(self.Size[0], self.Size[1] / 2 + 1), EAST)
@@ -595,8 +595,31 @@
         dc.SetLogicalFunction(wx.COPY)
         dc.SetUserScale(scalex, scaley)
     
-    def AddError(self, infos, start, end):
-        self.Errors[infos[0]] = (start[1], end[1])
+    # Adds an highlight to the connection
+    def AddHighlight(self, infos, start, end, highlight_type):
+        highlights = self.Highlights.setdefault(infos[0], [])
+        if infos[0] == "reference":
+            if start[0] == 0 and end[0] == 0:
+                AddHighlight(highlights, (start, end, highlight_type))
+        else:
+            AddHighlight(highlights, ((0, 0), (0, 1), highlight_type))
+    
+    # Removes an highlight from the connection
+    def RemoveHighlight(self, infos, start, end, highlight_type):
+        highlights = self.Highlights.get(infos[0], [])
+        if RemoveHighlight(highlights, (start, end, highlight_type)) and len(highlights) == 0:
+            self.Highlights.pop(infos[0])
+    
+    # Removes all the highlights of one particular type from the connection
+    def ClearHighlight(self, highlight_type=None):
+        if highlight_type is None:
+            self.Highlights = {}
+        else:
+            highlight_items = self.Highlights.items()
+            for name, highlights in highlight_items:
+                highlights = ClearHighlights(highlight, highlight_type)
+                if len(highlights) == 0:
+                    self.Highlights.pop(name)
     
     # Draws contact
     def Draw(self, dc):
@@ -651,11 +674,13 @@
         # Draw input and output connectors
         self.Input.Draw(dc)
         self.Output.Draw(dc)
-        if self.Errors.has_key("reference"):
-            HighlightErrorZone(dc, name_pos[0], name_pos[1], name_size[0], name_size[1])
-        if typetext != "" and (self.Errors.has_key("negated") or self.Errors.has_key("rising") or self.Errors.has_key("falling")):
-            HighlightErrorZone(dc, type_pos[0], type_pos[1], type_size[0], type_size[1])
-        
+        
+        if not getattr(dc, "printing", False):
+            for name, highlights in self.Highlights.iteritems():
+                if name == "reference":
+                    DrawHighlightedText(dc, self.Name, highlights, name_pos[0], name_pos[1])
+                elif typetext != "":
+                    DrawHighlightedText(dc, typetext, highlights, type_pos[0], type_pos[1])
 
 #-------------------------------------------------------------------------------
 #                         Ladder Diagram Coil
@@ -674,7 +699,7 @@
         self.Name = name
         self.Id = id
         self.Size = wx.Size(LD_ELEMENT_SIZE[0], LD_ELEMENT_SIZE[1])
-        self.Errors = {}
+        self.Highlights = {}
         # Create an input and output connector
         self.Input = Connector(self, "", "BOOL", wx.Point(0, self.Size[1] / 2 + 1), WEST)
         self.Output = Connector(self, "", "BOOL", wx.Point(self.Size[0], self.Size[1] / 2 + 1), EAST)
@@ -891,8 +916,31 @@
         dc.SetLogicalFunction(wx.COPY)
         dc.SetUserScale(scalex, scaley)
     
-    def AddError(self, infos, start, end):
-        self.Errors[infos[0]] = (start[1], end[1])
+    # Adds an highlight to the connection
+    def AddHighlight(self, infos, start, end, highlight_type):
+        highlights = self.Highlights.setdefault(infos[0], [])
+        if infos[0] == "reference":
+            if start[0] == 0 and end[0] == 0:
+                AddHighlight(highlights, (start, end, highlight_type))
+        else:
+            AddHighlight(highlights, ((0, 0), (0, 1), highlight_type))
+    
+    # Removes an highlight from the connection
+    def RemoveHighlight(self, infos, start, end, highlight_type):
+        highlights = self.Highlights.get(infos[0], [])
+        if RemoveHighlight(highlights, (start, end, highlight_type)) and len(highlights) == 0:
+            self.Highlights.pop(infos[0])
+    
+    # Removes all the highlights of one particular type from the connection
+    def ClearHighlight(self, highlight_type=None):
+        if highlight_type is None:
+            self.Highlights = {}
+        else:
+            highlight_items = self.Highlights.items()
+            for name, highlights in highlight_items:
+                highlights = ClearHighlights(highlight, highlight_type)
+                if len(highlights) == 0:
+                    self.Highlights.pop(name)
     
     # Draws coil
     def Draw(self, dc):
@@ -954,9 +1002,12 @@
         # Draw input and output connectors
         self.Input.Draw(dc)
         self.Output.Draw(dc)
-        if self.Errors.has_key("reference"):
-            HighlightErrorZone(dc, name_pos[0], name_pos[1], name_size[0], name_size[1])
-        if typetext != "" and (self.Errors.has_key("negated") or self.Errors.has_key("rising") or self.Errors.has_key("falling")):
-            HighlightErrorZone(dc, type_pos[0], type_pos[1], type_size[0], type_size[1])
+
+        if not getattr(dc, "printing", False):
+            for name, highlights in self.Highlights.iteritems():
+                if name == "reference":
+                    DrawHighlightedText(dc, self.Name, highlights, name_pos[0], name_pos[1])
+                elif typetext != "":
+                    DrawHighlightedText(dc, typetext, highlights, type_pos[0], type_pos[1])