--- a/graphics/SFC_Objects.py	Mon Aug 13 18:06:50 2007 +0200
+++ b/graphics/SFC_Objects.py	Tue Aug 14 14:53:06 2007 +0200
@@ -78,6 +78,19 @@
             self.Action.UnConnect(delete = self.Parent.GetDrawingMode() == FREEDRAWING_MODE)
     
     # Add output connector to step
+    def AddInput(self):
+        if not self.Input:
+            self.Input = Connector(self, "", "ANY", wx.Point(self.Size[0] / 2, 0), NORTH)
+            self.RefreshBoundingBox()
+    
+    # Remove output connector from step
+    def RemoveInput(self):
+        if self.Input:
+            self.Input.UnConnect()
+            self.Input = None
+            self.RefreshBoundingBox()
+    
+    # Add output connector to step
     def AddOutput(self):
         if not self.Output:
             self.Output = Connector(self, "", "ANY", wx.Point(self.Size[0] / 2, self.Size[1]), SOUTH)