     if canvas?.mode == .Concepts {
       if let concept = concept {
         concept.editing = true
-        needsDisplay = true
       }
     }
     sprint("conceptView: mouse down \(concept?.identifier)")

  override func mouseDown(theEvent: NSEvent) {
    sprint("mouse down")
    concept.editing = true
    needsDisplay = true
  }
  
  override func sprint(message: String) {

    sprint("insertNewLine")
    disableTextField()
    concept.editing = false
  }
  
  override func cancelOperation(sender: AnyObject?) {
