Flutter: Detect tapping on one widget and releasing on a different one

Question

I want to long press a first widget and trigger a function. During the same PointerDownEvent (that is, without removing finger or mouse from the screen) continue and drag the finger or mouse to a second widget. This second widget should trigger another function when the so named onPointerUp event happens.

I was thinking on using GestureDetector instances, but they don't seem to have what I am looking for, maybe I'm wrong. Another option would be using Listener instances and handling on whether their offsets match the pointer's offset. Could this be the solution? I wonder if there is a more straightforward way.

Something like pressing a key in a phone's keyboard and dragging the finger to select a symbol could be a good example.

Daniel Arechiga · Accepted Answer · 2021-10-12 18:12:37Z

2

You can create a Draggable with an invisible child on top of the original widget and each of the targets (in case more than one) can be a DragTarget. You then execute your desired function in the onAccept property of the DragTarget.

answered Oct 12, 2021 at 18:12

Daniel Arechiga

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