react long press event

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一个人的身影

Is there a way to add long press event in react-web application?

I have list of addresses. On long press on any address, I want to

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一个人的身影

2020-12-13 02:31

Here's a component that provides onClick and onHold events - adapt as needed...

CodeSandbox: https://codesandbox.io/s/hold-press-event-r8q9w

Usage:

import React from 'react'
import Holdable from './holdable'

function App() {

  function onClick(evt) {
    alert('click ' + evt.currentTarget.id)
  }

  function onHold(evt) {
    alert('hold ' + evt.currentTarget.id)
  }

  const ids = 'Label1,Label2,Label3'.split(',')

  return (
    <div className="App">
      {ids.map(id => (
        <Holdable
          onClick={onClick}
          onHold={onHold}
          id={id}
          key={id}
        >
          {id}
        </Holdable>
      ))}
    </div>
  )
}

holdable.jsx:

import React from 'react'

const holdTime = 500 // ms
const holdDistance = 3**2 // pixels squared

export default function Holdable({id, onClick, onHold, children}) {

  const [timer, setTimer] = React.useState(null)
  const [pos, setPos] = React.useState([0,0])

  function onPointerDown(evt) {
    setPos([evt.clientX, evt.clientY]) // save position for later
    const event = { ...evt } // convert synthetic event to real object
    const timeoutId = window.setTimeout(timesup.bind(null, event), holdTime)
    setTimer(timeoutId)
  }

  function onPointerUp(evt) {
    if (timer) {
      window.clearTimeout(timer)
      setTimer(null)
      onClick(evt)
    }
  }

  function onPointerMove(evt) {
    // cancel hold operation if moved too much
    if (timer) {
      const d = (evt.clientX - pos[0])**2 + (evt.clientY - pos[1])**2
      if (d > holdDistance) {
        setTimer(null)  
        window.clearTimeout(timer)
      }
    }
  }

  function timesup(evt) {
    setTimer(null)
    onHold(evt)
  }

  return (
    <div
      onPointerDown={onPointerDown}
      onPointerUp={onPointerUp}
      onPointerMove={onPointerMove}
      id={id}
    >
      {children}
    </div>
  )
}

Note: this doesn't work with Safari yet - pointer events are coming in v13 though - https://caniuse.com/#feat=pointer

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耶瑟儿～

2020-12-13 02:32

Brian's solution allows you to pass params to the children which I think is not doable with the Hook. Still, if I may suggest a bit cleaner solution for most common case where you want to add onHold behavior to a single component and you also want to be able to change the onHold timeout.

Material-UI example with Chip component:

'use strict';

const {
  Chip
} = MaterialUI

function ChipHoldable({
  onClick = () => {},
  onHold = () => {},
  hold = 500,
  ...props
}) {
  const [timer, setTimer] = React.useState(null);

  function onPointerDown(evt) {
    const event = { ...evt
    }; // convert synthetic event to real object
    const timeoutId = window.setTimeout(timesup.bind(null, event), hold);
    setTimer(timeoutId);
  }

  function onPointerUp(evt) {
    if (timer) {
      window.clearTimeout(timer);
      setTimer(null);
      onClick(evt);
    }
  }

  const onContextMenu = e => e.preventDefault();

  const preventDefault = e => e.preventDefault(); // so that ripple effect would be triggered

  function timesup(evt) {
    setTimer(null);
    onHold(evt);
  }

  return React.createElement(Chip, {
    onPointerUp,
    onPointerDown,
    onContextMenu,
    onClick: preventDefault,
    ...props
  });
}

const App = () =>  <div> {[1,2,3,4].map(i => < ChipHoldable style={{margin:"10px"}}label = {`chip${i}`}
    onClick = {
      () => console.log(`chip ${i} clicked`)
    }
    onHold = {
      () => console.log(`chip ${i} long pressed`)
    }
    />)}
    </div>


ReactDOM.render( <App/>, document.querySelector('#root'));

<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
</head>

<body>
  <div id="root"></div>
  <script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
  <script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap" />
  <script src="https://unpkg.com/@material-ui/core@latest/umd/material-ui.development.js"></script>
</body>

</html>

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南笙

2020-12-13 02:35

An adaptation of David's solution: a React hook for when you want to repeatedly fire the event. It uses setInterval instead.

export function useHoldPress(callback = () => {}, ms = 300) {
  const [startHoldPress, setStartHoldPress] = useState(false);

  useEffect(() => {
    let timerId;
    if (startHoldPress) {
      timerId = setInterval(callback, ms);
    } else {
      clearTimeout(timerId);
    }

    return () => {
      clearTimeout(timerId);
    };
  }, [startHoldPress]);

  return {
    onMouseDown: () => setStartHoldPress(true),
    onMouseUp: () => setStartHoldPress(false),
    onMouseLeave: () => setStartHoldPress(false),
    onTouchStart: () => setStartHoldPress(true),
    onTouchEnd: () => setStartHoldPress(false)
  };
}

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刺人心

2020-12-13 02:39

With hooks in react 16.8 you could rewrite class with functions and hooks.

import { useState, useEffect } from 'react';

export default function useLongPress(callback = () => {}, ms = 300) {
  const [startLongPress, setStartLongPress] = useState(false);

  useEffect(() => {
    let timerId;
    if (startLongPress) {
      timerId = setTimeout(callback, ms);
    } else {
      clearTimeout(timerId);
    }

    return () => {
      clearTimeout(timerId);
    };
  }, [callback, ms, startLongPress]);

  return {
    onMouseDown: () => setStartLongPress(true),
    onMouseUp: () => setStartLongPress(false),
    onMouseLeave: () => setStartLongPress(false),
    onTouchStart: () => setStartLongPress(true),
    onTouchEnd: () => setStartLongPress(false),
  };
}

import useLongPress from './useLongPress';

function MyComponent (props) {
  const backspaceLongPress = useLongPress(props.longPressBackspaceCallback, 500);

  return (
    <Page>
      <Button {...backspaceLongPress}>
        Click me
      </Button>
    </Page>
  );
};

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误落风尘

2020-12-13 02:46

Nice hook! But I would like make a small improvement. Using useCallback to wrap event handlers. This ensures these will not changed on every render.

import { useState, useEffect, useCallback } from 'react';

export default function useLongPress(callback = () => {}, ms = 300) {
  const [startLongPress, setStartLongPress] = useState(false);

  useEffect(() => {
    let timerId;
    if (startLongPress) {
      timerId = setTimeout(callback, ms);
    } else {
      clearTimeout(timerId);
    }

    return () => {
      clearTimeout(timerId);
    };
  }, [callback, ms, startLongPress]);

  const start = useCallback(() => {
    setStartLongPress(true);
  }, []);
  const stop = useCallback(() => {
    setStartLongPress(false);
  }, []);

  return {
    onMouseDown: start,
    onMouseUp: stop,
    onMouseLeave: stop,
    onTouchStart: start,
    onTouchEnd: stop,
  };
}

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暗喜

2020-12-13 02:46

Ionic React LongPress Example I use it with Ionic React, it works well.

import React, {useState}  from 'react';
import { Route, Redirect } from 'react-router';

interface MainTabsProps { }
const MainTabs: React.FC<MainTabsProps> = () => {

// timeout id  
var initial: any;

// setstate
const [start, setStart] = useState(false);

const handleButtonPress = () => {
  initial = setTimeout(() => {
    setStart(true); // start long button          
    console.log('long press button');
    }, 1500);
}

const handleButtonRelease = () => {
  setStart(false); // stop long press   
  clearTimeout(initial); // clear timeout  
  if(start===false) { // is click
    console.log('click button');
  }  
}

  return (
    <IonPage>
      <IonHeader>
        <IonTitle>Ionic React LongPress</IonTitle>
      </IonHeader>    
      <IonContent className="ion-padding">
        <IonButton expand="block"  
          onMouseDown={handleButtonPress} 
          onMouseUp={handleButtonRelease} >LongPress</IonButton>    
      </IonContent>
    </IonPage>
  );
};

export default MainTabs;

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