diff -r b89484560a97 -r c67488bd8134 dialogs/FBDBlockDialog.py
--- a/dialogs/FBDBlockDialog.py	Tue Apr 09 13:18:51 2019 +0200
+++ b/dialogs/FBDBlockDialog.py	Tue Apr 09 14:08:44 2019 +0200
@@ -199,7 +199,7 @@
                     control.SetValue(value)
 
         # Refresh preview panel
-        self.RefreshPreview()
+        self.DrawPreview()
 
     def GetValues(self):
         """
@@ -293,7 +293,7 @@
             self.BlockName.ChangeValue("")
 
         # Refresh preview panel
-        self.RefreshPreview()
+        self.DrawPreview()
 
     def OnNameChanged(self, event):
         """
@@ -303,7 +303,7 @@
         if self.BlockName.IsEnabled():
             # Save block name typed by user
             self.CurrentBlockName = self.BlockName.GetValue()
-            self.RefreshPreview()
+            self.DrawPreview()
         event.Skip()
 
     def OnInputsChanged(self, event):
@@ -312,7 +312,7 @@
         @param event: wx.SpinEvent
         """
         if self.Inputs.IsEnabled():
-            self.RefreshPreview()
+            self.DrawPreview()
         event.Skip()
 
     def OnExecutionOrderChanged(self, event):
@@ -320,7 +320,7 @@
         Called when block execution order value changed
         @param event: wx.SpinEvent
         """
-        self.RefreshPreview()
+        self.DrawPreview()
         event.Skip()
 
     def OnExecutionControlChanged(self, event):
@@ -328,10 +328,10 @@
         Called when block execution control value changed
         @param event: wx.SpinEvent
         """
-        self.RefreshPreview()
+        self.DrawPreview()
         event.Skip()
 
-    def RefreshPreview(self):
+    def DrawPreview(self):
         """
         Refresh preview panel of graphic element
         Override BlockPreviewDialog function
@@ -355,4 +355,4 @@
             self.Element = None
 
         # Call BlockPreviewDialog function
-        BlockPreviewDialog.RefreshPreview(self)
+        BlockPreviewDialog.DrawPreview(self)