javascript - how to convert mouse events and touch events using java script

Question

Any idea about about how to use double click event in tablets or ipad. Like 'onmousedown' is equivalent to 'touchstart'.

Answer 1

也许用于多点触控手势的hammer.js 库也会让您感兴趣：http ://eightmedia.github.com/hammer.js/

Answer 2

To Detect long press you can simply use like this.

<div id="element" style="width:200px;height:200px; border:1px solid red;">&nbsp;</div>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

<!------------ Javascript Code ---------->

$('#element').each(function() {

    var timeout, longtouch;

    $(this).mousedown(function() {
        timeout = setTimeout(function() {
            longtouch = true;
        }, 1000);
    }).mouseup(function() {
        if (longtouch) {
            alert('long touch');
        } else {
            alert('short touch');

        }
        longtouch = false;
        clearTimeout(timeout);
    });

});​

Answer 3

我想一个快速的谷歌搜索会解决你的问题，简短的回答是肯定的。长答案是您最好使用像jQuery-mobile这样的框架来为您处理，为您提供 ontouch、scroll 等事件。

还研究了使这些点击事件更快的energet.js

也类似于这个stackvoverflow答案

Answer 4

过时的话题，但尚未标记为已回答，所以我想我会试一试。

在大多数情况下，向事件添加抽象层的 JavaScript 框架会有所帮助。（正如其他人指出的那样。）但是对于你不能的情况，试试这个。

var el = document.getElementById('myelement');
var numClicks = 0;  // count the number of recent clicks
var lastClickTime = 0;  // time of last click in milliseconds
var threshold = 50;  // you need to set this to a reasonable value

function isDoubleClick() {
    var r;
    if( numClicks == 0 ) {
      numClicks++;  // first click never counts
      r = false;
    } else if( new Date().getTime() - lastClickTime > threshold ) {
      numClicks = 1; // too long time has passed since lsat click, reset the count
      r = false;
    } else {
      numClicks++; // note: reset numClicks here if you want to treat triple-clicks and beyond differently
      r = true;
    }
    lastClickTime = new Date().getTime();
    return r;
}

var myClickFunction = function (event) {
    if( isDoubleClick() ) {
      // your double-click code
    } else {
      // plain click code
    }
}

// bind your own click function to the mouse click event
el.addEventListener("mouseclick", myClickFunction, false);

Answer 5

I tried something like this :

<------java script and jquery ------>

            var startTime,endTime;

                $('#main-content').mousedown(function(event){
                    startTime = new Date().getTime();
                    //any other action
                });
                $('#main-content').mouseup(function(event){
                   endTime = new Date().getTime();
                   if(isTouchDevice()){
                    if((endTime-startTime)>200 && (endTime-startTime)<1000 ){
                        alert('long touch')

                    }
                  }

                });

function isTouchDevice(){
  return (typeof(window.ontouchstart) != 'undefined') ? true : false;
}

Answer 6

Try to implement doubleTap you can use this code.


(function($){
    // Determine if we on iPhone or iPad
    var isiOS = false;
    var agent = navigator.userAgent.toLowerCase();
    if(agent.indexOf('iphone') >= 0 || agent.indexOf('ipad') >= 0){
           isiOS = true;
    }

    $.fn.doubletap = function(onDoubleTapCallback, onTapCallback, delay){
        var eventName, action;
        delay = delay == null? 500 : delay;
        eventName = isiOS == true? 'touchend' : 'click';

        $(this).bind(eventName, function(event){
            var now = new Date().getTime();
            var lastTouch = $(this).data('lastTouch') || now + 1 /** the first time this will make delta a negative number */;
            var delta = now - lastTouch;
            clearTimeout(action);
            if(delta<500 && delta>0){
                if(onDoubleTapCallback != null && typeof onDoubleTapCallback == 'function'){
                    onDoubleTapCallback(event);
                }
            }else{
                $(this).data('lastTouch', now);
                action = setTimeout(function(evt){
                    if(onTapCallback != null && typeof onTapCallback == 'function'){
                        onTapCallback(evt);
                    }
                    clearTimeout(action);   // clear the timeout
                }, delay, [event]);
            }
            $(this).data('lastTouch', now);
        });
    };
})(jQuery);


and to use doubleTap event

$(selector).doubletap(
    /** doubletap-dblclick callback */
    function(event){
        alert('double-tap');
    },
    /** touch-click callback (touch) */
    function(event){
        alert('single-tap');
    },
    /** doubletap-dblclick delay (default is 500 ms) */
    400
);