In Google App Maker, can you check when a file is uploaded in the Google Drive Picker widget? I am trying to call scripts based on the event, when a clicks UPLOAD after selecting a file and successfully uploads a file to the Google Drive. In Google App Maker, the only events are onAttach, onDetach, onDataLoad, onDocumentSelect, onCancel, and onPickerInit. Thanks.
onDocumentSelect event is fired both when user selects existing file or uploads a new one. Information about the selected/uploaded file(s) can be found in the result object that is passed as a parameter to the event. Here is a link to the Drive Picker widget docs - https://developers.google.com/appmaker/ui/input-widgets#drive-picker