What gestures can be handled in Flutter?

In Flutter, the following gestures can be handled using widgets like GestureDetector and others:

• Taps:

  • onTap: Simple tap.
  • onDoubleTap: Double tap.
  • onLongPress: Long press.
  • onTapDown: Tap at the moment of contact.
  • onTapUp: Release after tap.
  • onTapCancel: Cancel tap.

• Dragging (Draggable):

  • onVerticalDragStart: Start of vertical drag.
  • onVerticalDragUpdate: Updating vertical drag.
  • onVerticalDragEnd: End of vertical drag.
  • onHorizontalDragStart: Start of horizontal drag.
  • onHorizontalDragUpdate: Updating horizontal drag.
  • onHorizontalDragEnd: End of horizontal drag.
  • onPanStart: Start of any pan.
  • onPanUpdate: Updating any pan.
  • onPanEnd: End of any pan.

• Scale (Zoom):

  • onScaleStart: Start of scaling.
  • onScaleUpdate: Updating scaling.
  • onScaleEnd: End of scaling.

• Other gestures:

  • onForcePressStart: Start of force press (supported on some devices).
  • onForcePressPeak: Peak of force press.
  • onForcePressUpdate: Updating force press.
  • onForcePressEnd: End of force press.

Example of using GestureDetector:

import 'package:flutter/material.dart';

class MyGestureWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        print('Tap!');
      },
      onDoubleTap: () {
        print('Double tap!');
      },
      onLongPress: () {
        print('Long press!');
      },
      child: Container(
        color: Colors.blue,
        width: 100,
        height: 100,
        child: Center(
          child: Text('Press me'),
        ),
      ),
    );
  }
}