Show tooltip programmatically

Question

I want to make if floating action button pressed, it show tooltip. But i don't know how to show it programmatically.

Is there a way to show it?

Answer 1

Currently there's no official way to do this.

BUT, there's a workaround : use ensureTooltipVisible from _TooltipState using a GlobalKey to fetch it.

Typically you'd the following field inside the widget instantiating Tooltip : final key = new GlobalKey();

Then, on your tooltip, you'll assign this key :

new Tooltip(
  key: key,
  ...
),

And finally inside the onPressed of your FloatingButton you can do :

onPressed: () {
  final dynamic tooltip = key.currentState;
  tooltip.ensureTooltipVisible();
},