Use case

Currently, Flutter’s InkWell widget supports onLongPress, but not a direct onLongPressUp callback. This makes it harder to distinguish the moment when a long press is released, especially if the developer wants to trigger logic only after a full long press and lift.

Why this is a good solution

This issue proposes adding an onLongPressUp callback to the InkWell widget, to be invoked when the user has performed a long press and then released their finger or mouse.

• Consistency with existing gesture callbacks: GestureDetector supports onLongPressUp, but InkWell does not, despite being a common wrapper for interactions in Material apps.
• Fine-grained control: Developers can now distinguish between the press and release of a long press, enabling more complex interaction patterns (e.g. preview on long press, action on release).
• Prevents workaround hacks: Without onLongPressUp, developers are forced to combine InkWell with a GestureDetector or manage custom gesture logic to detect when a long press is released, which increases complexity and reduces code readability.

Proposal

Imagine a file manager app where a user long-presses a file to preview it and only wants to select the file if they release after a long press.

InkWell(
  onLongPress: () {
    // Show file preview
  },
  onLongPressUp: () {
    // Confirm selection only when user lifts after long press
    selectFile();
  },
  child: FileTile(file),
);