如何区分鼠标的“点击”和“拖动”

我使用jQuery。点击来处理Raphael图形上的鼠标点击事件，同时，我需要处理鼠标拖动事件，鼠标拖动在Raphael中由鼠标下拉，鼠标上拉和鼠标移动组成。

很难区分点击和拖动，因为点击也包含鼠标下拉和鼠标上拉，我怎么能区分鼠标“点击”和鼠标“拖动”然后在Javascript?

当前回答

基于这个答案，我在React组件中这样做:

export default React.memo(() => {
    const containerRef = React.useRef(null);

    React.useEffect(() => {
        document.addEventListener('mousedown', handleMouseMove);

        return () => document.removeEventListener('mousedown', handleMouseMove);
    }, []);

    const handleMouseMove = React.useCallback(() => {
        const drag = (e) => {
            console.log('mouse is moving');
        };

        const lift = (e) => {
            console.log('mouse move ended');
            window.removeEventListener('mousemove', drag);
            window.removeEventListener('mouseup', this);
        };

        window.addEventListener('mousemove', drag);
        window.addEventListener('mouseup', lift);
    }, []);

    return (
        <div style={{ width: '100vw', height: '100vh' }} ref={containerRef} />
    );
})

2020-11-10 09:59:24

其他回答

对于OSM地图上的公共操作(单击时放置标记)，问题是:1)如何确定鼠标向下的持续时间->向上(您无法想象为每次单击创建一个新的标记)2)鼠标向下移动期间->向上(即用户正在拖动地图)。

const map = document.getElementById('map');

map.addEventListener("mousedown", position); 
map.addEventListener("mouseup", calculate);

let posX, posY, endX, endY, t1, t2, action;

function position(e) {

  posX = e.clientX;
  posY = e.clientY;
  t1 = Date.now();

}

function calculate(e) {

  endX = e.clientX;
  endY = e.clientY;
  t2 = (Date.now()-t1)/1000;
  action = 'inactive';

  if( t2 > 0.5 && t2 < 1.5) { // Fixing duration of mouse down->up

      if( Math.abs( posX-endX ) < 5 && Math.abs( posY-endY ) < 5 ) { // 5px error on mouse pos while clicking
         action = 'active';
         // --------> Do something
      }
  }
  console.log('Down = '+posX + ', ' + posY+'\nUp = '+endX + ', ' + endY+ '\nAction = '+ action);    

}

2019-06-27 08:49:23

基于这个答案，我在React组件中这样做:

export default React.memo(() => {
    const containerRef = React.useRef(null);

    React.useEffect(() => {
        document.addEventListener('mousedown', handleMouseMove);

        return () => document.removeEventListener('mousedown', handleMouseMove);
    }, []);

    const handleMouseMove = React.useCallback(() => {
        const drag = (e) => {
            console.log('mouse is moving');
        };

        const lift = (e) => {
            console.log('mouse move ended');
            window.removeEventListener('mousemove', drag);
            window.removeEventListener('mouseup', this);
        };

        window.addEventListener('mousemove', drag);
        window.addEventListener('mouseup', lift);
    }, []);

    return (
        <div style={{ width: '100vw', height: '100vh' }} ref={containerRef} />
    );
})

2020-11-10 09:59:24

下面的编码是检测鼠标的移动。

它适用于大多数情况。这也取决于关于如何将mouseevent处理为单击。在JavaScript中，检测非常简单。它不关心如何在鼠标下拉和鼠标上拉之间按住或移动。 Event.detail不会重置为1当你的鼠标移动鼠标下拉和鼠标上拉。如果你需要区分点击和长按，你需要检查事件的差异。时间戳。

// ==== add the code at the begining of your coding ==== let clickStatus = 0; (() => { let screenX, screenY; document.addEventListener('mousedown', (event) => ({screenX, screenY} = event), true); document.addEventListener('mouseup', (event) => (clickStatus = Math.abs(event.screenX - screenX) + Math.abs(event.screenY - screenY) < 3), true); })(); // ==== add the code at the begining of your coding ==== $("#draggable").click(function(event) { if (clickStatus) { console.log(`click event is valid, click count: ${event.detail}`) } else { console.log(`click event is invalid`) } }) <!doctype html> <html lang="en">  <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>jQuery UI Draggable - Default functionality</title> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <link rel="stylesheet" href="/resources/demos/style.css"> <style> #draggable { width: 150px; height: 150px; padding: 0.5em; } </style> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <script> $( function() { $( "#draggable" ).draggable(); } ); </script> </head> <body> <div id="draggable" class="ui-widget-content"> <p>Drag me around</p> </div> </body> </html>

2021-06-22 10:25:27

你可以这样做:

2020-09-19 20:23:08

清洁ES2015

Let drag = false; 文档。addEventListener('mousedown'， () => drag = false); 文档。addEventListener('mousemove'， () => drag = true); 文档。addEventListener('mouseup'， () => console.log(拖动?'拖动':'点击'));

正如其他人评论的那样，没有遇到任何bug。

2018-06-26 19:04:18

如何区分鼠标的“点击”和“拖动”

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