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

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

其他回答

来自@Przemek的回答，

函数listenClickOnly(元素，回调，阈值=10){ 让拖动= 0; 元素。addEventListener('mousedown'， () => drag = 0); 元素。addEventListener('mousemove'， () => drag++); 元素。addEventListener('mouseup'， e => { 如果(拖动<阈值)回调(e); })；｝ listenClickOnly ( 文档, () => console.log('click')， 10 ）;

2020-06-22 05:54:46

另一个基于类的香草JS使用距离阈值的解决方案

private initDetectDrag(element) {
    let clickOrigin = { x: 0, y: 0 };
    const dragDistanceThreshhold = 20;

    element.addEventListener('mousedown', (event) => {
        this.isDragged = false
        clickOrigin = { x: event.clientX, y: event.clientY };
    });
    element.addEventListener('mousemove', (event) => {
        if (Math.sqrt(Math.pow(clickOrigin.y - event.clientY, 2) + Math.pow(clickOrigin.x - event.clientX, 2)) > dragDistanceThreshhold) {
            this.isDragged = true
        }
    });
}

在类内部添加(SOMESLIDER_ELEMENT也可以是document为global):

private isDragged: boolean;
constructor() {
    this.initDetectDrag(SOMESLIDER_ELEMENT);
    this.doSomeSlideStuff(SOMESLIDER_ELEMENT);
    element.addEventListener('click', (event) => {
        if (!this.sliderIsDragged) {
            console.log('was clicked');
        } else {
            console.log('was dragged, ignore click or handle this');
        }
    }, false);
}

2019-12-18 11:27:43

我认为区别在于，在拖拽中，mousedown和mouseup之间有一个鼠标移动，但在点击中没有。

你可以这样做:

const element = document.createElement('div') element.innerHTML = 'test' document.body.appendChild(element) let moved let downListener = () => { moved = false } element.addEventListener('mousedown', downListener) let moveListener = () => { moved = true } element.addEventListener('mousemove', moveListener) let upListener = () => { if (moved) { console.log('moved') } else { console.log('not moved') } } element.addEventListener('mouseup', upListener) // release memory element.removeEventListener('mousedown', downListener) element.removeEventListener('mousemove', moveListener) element.removeEventListener('mouseup', upListener)

2011-05-18 09:03:17

很简单，

el = document.getElementById("your_id"); var isDown = false; 埃尔。addEventListener('mousedown'， function () { isDown = true; })；埃尔。addEventListener('mouseup'， function () { isDown = false; })；埃尔。addEventListener('鼠标移动'，函数(){ if (isDown) { //你的代码在这里｝ })；

2022-10-25 07:55:54

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

如何区分鼠标的“点击”和“拖动”

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