Sets whether the edit buffer of the XbpSLE object is READONLY.
:setEditable( [<lEditable>] ) --> lOldSettingThis method returns whether the XbpSLE object was editable before the :setEditable() method was called.
The :setEditable() method determines whether the XbpSLE object can be edited without having to call the :configure() method. Normally, whether the text buffer of the XbpSLE object can be edited is defined using the instance variable :editable which must be set before the method :create() is called. When there is a change to the readonly status of the XbpSLE object after the call to :create(), the :setEditable() method is used. This method should not be confused with the :disable() method that makes the XbpSLE object inaccessible. When the edit buffer is defined as readonly using :setEditable( .F. ), the text can still be scrolled and selected. Additional characters cannot be input, but selected characters can be copied to the clipboard.
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