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--- howtos:toolcoding:common_history_and_background_checks [2010/09/14 16:14]
marcus.williams created
+++ howtos:toolcoding:common_history_and_background_checks [2010/09/14 18:09]
shona.weldon
@@ Line 1: / Line 1: @@
-Many views require that a history be selected (if running in a simulator)
+Many views require that a history be selected (if running in a simulator) and/or a background scenario be picked in. In these cases a section of code near the top of the view - following the object declarations - is used to check that the required history and/or background is in place. If not in place the code advises the user and quits.
+Common code sections are listed below.
+===== Simulator - history and background required =====
+<code>
+boolean $answer
+if $history == false
+	say ("This view requires a history.")
+	listen ("                              enter to continue >> ",$answer)
+	quit (-1)
+endif
+if $background == false
+	say ("This view requires a background scenario.")
+	listen ("                              enter to continue >> ",$answer)
+	quit (-1)
+endif
+</code>
+FIXME - do we have a best practice on the quit() return code?

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