onLongPress

Learn to catch long press with onLongPress.

onLongPress

onLongPress is called when the user holds a finger on the widget for about 500 milliseconds. Unlike a single tap, it requires holding for a certain duration, which makes it suitable for context menus or "more options" actions.

GestureDetector(
  onTap: () => print('Single'),
  onLongPress: () => print('Long pressed'),
  child: Container(width: 80, height: 80),
)

The long press duration

GestureDetector has no parameter to set the long press duration; the duration is fixed. Finer control requires lower-level classes, which is beyond this lesson. In most cases the default duration is sufficient and you do not configure it separately.

Exercise Catch long press with onLongPress

Write a function longPress that prints Long pressed. In main call longPress and give the GestureDetector an empty function as onTap and longPress as onLongPress.

Show example solution

import 'package:flutter/material.dart';

void uzunBasma() {
  print('Uzun basildi');
}

void main() {
  uzunBasma();
  runApp(const Uygulama());
}

class Uygulama extends StatelessWidget {
  const Uygulama({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: GestureDetector(
            onTap: () {},
            onLongPress: uzunBasma,
            child: Container(
              width: 100,
              height: 100,
              color: Colors.red,
            ),
          ),
        ),
      ),
    );
  }
}

Test yourself

When is onLongPress triggered?
- When the finger is held down for a while
- On double tap
- As soon as tapped
- On horizontal drag
Show answer

When the finger is held down for a while — onLongPress requires the finger to remain pressed on the widget for a certain duration (about 500 ms).

Add the onLongPress parameter

GestureDetector(
  onTap: () => print('Tek'),
  ____: () => print('Uzun'),
  child: Text('B'),
)

Show answer

GestureDetector(
  onTap: () => print('Tek'),
  onLongPress: () => print('Uzun'),
  child: Text('B'),
)

Long press parts

onLongPress

Long press callback
500 ms

Approximate waiting time
onTap

Short tap callback
child

The widget whose gestures are captured

Next lesson: onHorizontalDragUpdate

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