[Proposal] Modify 300ms delay when using double tap

[toly1994328]

When I use DoubleTap and Tap together ，tap will delay 300ms to check it's DoubleTap or not . It doesn't matter on mobile，but in desktop , there is a significant delay when tap fast . I know the reason is kDoubleTapTimeout ms Timer，but it's const. May I have access to change it , or have any solution to handle click speed ?

---

flutter --version
Flutter 3.0.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision fb57da5 (4 weeks ago) • 2022-05-19 15:50:29 -0700
Engine • revision caaafc5604
Tools • Dart 2.17.1 • DevTools 2.12.2

[maheshj01]

Hi @toly1994328, Thanks for filing the issue. This is currently not possible to configure the double-tap duration. I will leave this for the team to decide.

flutter/packages/flutter/lib/src/gestures/multitap.dart

Line 355 in b29c64b

void _startDoubleTapTimer() {

[jonahwilliams]

Are you trying to use a double tap gesture recognizer to simulate a double click recognizer?

[animator]

Hi Flutter team, Any updates on this issue?
For those who are not aware. The issue was first reported in #22950 (2018). The issue was closed and a very poor solution was suggested which required modifying flutter framework code.

[kozw]

As a workaround you can wrap a GestureDetector with a Listener and use the onPointerDown as an alternative to the delayed onTap.

Listener(
  onPointerDown: (event) => handleTap(),
  child: GestureDetector(
    onDoubleTap: handleDoubleTap,
    child: ...));

Use with a caution; comes with the side-effects where both a double tap and two taps are registered, but at least there is no delay :)

[animator]

@kozw I don't understand why this issue and various workarounds still exist.
All @toly1994328 , me and other devs have been asking for a long time is that the Flutter team should provide us a simple way to modify kDoubleTapTimeout. 300ms might be good for mobiles, but for desktop it makes a lot of difference and severely deters user experience.