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Window Activation Trigger

Sometimes FileMaker developers miss a script trigger to run when you switch between windows. We usually recommend people check if Window.Current function returns a new number. And you may do that with Schedule functions.

 

Here is a script to start a schedule to check the window regularly:

 

# current window

Set Variable [ $currentWindow ; Value: MBS("Window.Current") ] 

Set Variable [ $r ; Value: MBS( "FM.VariableSet"; "WindowActivateTriggerCurrentWindow"; $currentWindow ) ] 

# Schedule a calculation to check window every second

Set Variable [ $schedule ; Value: MBS( "Schedule.EvaluateAfterDelay"; 1; "Let([

 

lastWindow = MBS( \"FM.VariableGet\"; \"WindowActivateTriggerCurrentWindow\" );

e1 = MBS(\"IsError\"); 

currentWindow = MBS( \"Window.Current\" );

e2 = MBS(\"IsError\");

 

r = If(e1 = 0 AND e2 = 0 AND lastWindow ≠ currentWindow; Let([

 

w = MBS( \"FM.VariableSet\"; \"WindowActivateTriggerCurrentWindow\"; currentWindow );

e = MBS( \"FM.RunScript\"; \"" & Get(FileName) & "\"; \"Window Activated Trigger\")

 

]; 0); 0)

 

];1)"; ""; ""; 1 ) ] 

Set Variable [ $r ; Value: MBS( "FM.VariableSet"; "WindowActivateTrigger"; $schedule ) ] 


As you see, we use a variable via MBS Plugin to store the number of the current window independent of the scope of $$ variables. The calculation is evaluated once a second (when FileMaker is not busy) and if we get the window number, we remember it and trigger the script.

 

To stop the trigger, we can release the schedule:

 

# stop trigger if it is running

If [ MBS( "FM.VariableExists"; "WindowActiateTrigger" ) ] 

Set Variable [ $w ; Value: MBS( "FM.VariableGet"; "WindowActivateTrigger" ) ] 

Set Variable [ $r ; Value: MBS("Schedule.Release"; $w) ] 

Set Variable [ $r ; Value: MBS( "FM.VariableClear"; "WindowActivateTrigger" ) ] 

Set Variable [ $r ; Value: MBS( "FM.VariableClear"; "WindowActivateTriggerCurrentWindow" ) ] 

End If

 

Please try and comment. Let us know if you have questions. The example database will be included with the next pre-release.

Claris FileMaker Plugin
23 10 22 - 09:27

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