I was wondering if there is a way to change the functionality of the swipe down gesture in Filemaker Go.
As of now, when swiping down - the toolbar appears. Is there any way I can catch the process so it would proceed to do something else?
FileMaker's capturing for gestures is limited to what is in the OnGestureTap script trigger, with the Get(TriggerGestureInfo) companion function.
OnGestureTap - FileMaker Pro 17 Advanced Help
Get(TriggerGestureInfo) - FileMaker Pro 17 Advanced Help
Those actions are mostly tap based, not swipe based. FileMaker Go has some built in features for swipe (like you noted, but also things like swiping left and right to change records in form views).
However, since showing and hiding the status toolbar in FileMaker Go causes the layout size to change, you can use the OnLayoutSizeChange trigger and the Get(StatusAreaState) companion function to mimic the detection of the swipe down action.
OnLayoutSizeChange - FileMaker Pro 17 Advanced Help
Per that document:
in FileMaker Go: rotating the iOS device, hiding or showing the status toolbar, or when a window is first opened
Get(StatusAreaState) - FileMaker Pro 17 Advanced Help
Retrieving data ...