Several people gave helpful replies to my question, including pointing out that this is a case of “resumeStack”, not “openCard”:
Is there some simple way that an openCard handler can branch based on what card it is coming from? When a user goes to a different card in a stack, or to a different stack, I use an “openCard” handler to set things up. But I do not want those actions taken if the user is merely “returning” to a card after using a palette tool, or after a palette tool has been opened. Jacqueline Gay suggested using the “recentCards” to determine what card the user is coming from. So I wrote this handler: function resumedTheSameCard -- call this in a "resumeStack" handler. -- returns true if palette "tTools" has just been active and the resumeStack message was received by the same card that had been active when that palette was activated. -- returns false if we are coming from a different card, either directly or with a palette activation in between. get the recentCards if the long id of stack "tTools" is not in line 2 of it then return false -- nb should work even if palette "tTools" stack has several cards return line 1 of it = line 3 of it end resumedTheSameCard But this does not work. When I debug, I see that line 2 of the recentCards does not refer to a card on my palette stack (“tTools”); it refers instead to a card in the stack “Execution Contexts”. Why is that LiveCode system stack appearing in the recentCards, and why is my palette not appearing there? Many thanks. David Epstein _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
