The way that the loop is written would make it blocking. If you wanted the loop to start running and then stop after the mouseUp happens I think you would need to add a "wait x millisec with messages”
Fo example: global myVar on elsoTester put 0 into myVar -- some code repeat until myVar > 0 -- set the thumbPosition of scrollBar "ProgressBar" to (the thumbPosition of scrollBar "ProgressBar" + 5) -- testing wait 500 millisec with messages end repeat -- some code answer "Finished" end elsoTester Depending on what you are doing, another method would be to use a "send it time" mechanism where the handler keeps calling itself until myVar > 0 For example: local sFlag global myVar command elsoTester if sFlag is empty then put 0 into myVar -- some code end if repeat until myVar > 0 -- set the thumbPosition of scrollBar "ProgressBar" to (the thumbPosition of scrollBar "ProgressBar" + 5) -- testing put “waiting” into sFlag send elsoTester to me in 500 millisec exit elsoTester end repeat answer “Finished" end elsoTester To be thorough you might also might want to empty the message queue of any other elsoTester messages before sending in time or add a timer which will eventually time out if myVar doesn’t exceed 0 after a set time. -- Scott Morrow Elementary Software (Now with 20% less chalk dust!) web https://elementarysoftware.com/ email sc...@elementarysoftware.com booth 1-360-734-4701 ------------------------------------------------------ > On Jul 26, 2025, at 12:44 AM, jbv via use-livecode > <use-livecode@lists.runrev.com> wrote: > > Hi list, > > Let's say I have a portion of a script like this : > > global myVar > put 0 into myVar > -- some code > repeat until myVar > 0 > end repeat > -- some code > > and the content of global myVar being changed > in a handler of another control : > > on mouseUp > global myVar > put 1 into myVar > end mouseUp > > I know this is not very elegant, but my question is : > can the change in myVar be detected in a loop like > above ? > I made some tests and it doesn't seem to work... > > Thank you in advance. > jbv > > _______________________________________________ > 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 _______________________________________________ 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