disable-evaluation in drscheme:unit:tab<%>

Call this method to disable evaluation GUI evaluation while some evaluation (or expansion) is taking place on another thread.

Override this method if you add a GUI-based mechanism for initiating evaluation in the frame.

This method is also called when the user switches tabs.

See also enable-evaluation.

• (send a-drscheme:unit:tab disable-evaluation) -> void

  Disables the Run button, and the Run menu item and locks the interactions window, and the definitions window.