GestureDetector that overrides children GestureDetectors?

Question

Is there any way to make a GestureDetector override the functionality of all children GestureDetectors?

I have a complex Widget that I would like to be able to easily override all of its behavior at a high level. For example, locking a free user out of functionality.

Answer 1

To temporarily disable all child gesture detectors, use an IgnorePointer widget:

  @override
  Widget build(BuildContext context) {

    bool ignoreChildGestures = true;

    return GestureDetector(
      onTap: () {
        print('parent tapped');
      },
      child: IgnorePointer(
        ignoring: ignoreChildGestures,
        child: GestureDetector(
          onTapDown: (details) {
            // won't be called when ignoring is set to true
            print('child tap down!');
          },
        ),
      ),
    );
  }

Answer 2

You can change HitTestBehavior behavior of GestureDetector to HitTestBehavior.opaque

GestureDetector(
   behavior: HitTestBehavior.opaque,
   ...
)

By default, it uses HitTestBehavior.deferToChild.