If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.

Prototype of the Material Design menu animation of Google Calendar for iOS. See how it was created step-by-step in the video of the webinar "Adaptive Prototypes & Material Design UI Library" http://docs.proto.io/videos/adaptive-prototypes-material-design-ui-library/ Skip to minute 35:14 of the webinar to specifically see this prototype being made. TAGS: material design google iOS calendar Enjoy.