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Javascript with jQuery: Click and double click on same element, different effect, one disables the other

由 元气小坏坏 提交于 2019-11-26 17:42:36
UltraInstinct

The general idea:

  1. Upon the first click, dont call the associated function (say single_click_function()). Rather, set a timer for a certain period of time(say x). If we do not get another click during that time span, go for the single_click_function(). If we do get one, call double_click_function()

  2. Timer will be cleared once the second click is received. It will also be cleared once x milliseconds are lapsed.

BTW, check Paolo's reply out: Need to cancel click/mouseup events when double-click event detected and of course the entire thread! :-)

Better answer: https://stackoverflow.com/a/7845282/260610

Working demo

$('#alreadyclicked').val('no click');
$('td.dblclickable').on('click',function(){
    var $button=$(this);
    if ($button.data('alreadyclicked')){
        $button.data('alreadyclicked', false); // reset
        $('#alreadyclicked').val('no click');

        if ($button.data('alreadyclickedTimeout')){
            clearTimeout($button.data('alreadyclickedTimeout')); // prevent this from happening
        }
        // do what needs to happen on double click. 
        $('#action').val('Was double clicked');
    }else{
        $button.data('alreadyclicked', true);
        $('#alreadyclicked').val('clicked');
        var alreadyclickedTimeout=setTimeout(function(){
            $button.data('alreadyclicked', false); // reset when it happens
            $('#alreadyclicked').val('no click');
            $('#action').val('Was single clicked');
            // do what needs to happen on single click. 
            // use $button instead of $(this) because $(this) is 
            // no longer the element
        },300); // <-- dblclick tolerance here
        $button.data('alreadyclickedTimeout', alreadyclickedTimeout); // store this id to clear if necessary
    }
    return false;
});

obviously use <td class="dblclickable">

puttyshell

Rewrite user822711's answer for reuse:

  $.singleDoubleClick = function(singleClk, doubleClk) {
    return (function() {
      var alreadyclicked = false;
      var alreadyclickedTimeout;

      return function(e) {
        if (alreadyclicked) {
          // double
          alreadyclicked = false;
          alreadyclickedTimeout && clearTimeout(alreadyclickedTimeout);
          doubleClk && doubleClk(e);
        } else {
          // single
          alreadyclicked = true;
          alreadyclickedTimeout = setTimeout(function() {
            alreadyclicked = false;
            singleClk && singleClk(e);
          }, 300);
        }
      }
    })();
  }

Call the function.

$('td.dblclickable').bind('click', $.singleDoubleClick(function(e){
  //single click.
}, function(e){
  //double click.
}));

The issue only occurs when the editable field is clicked, so attach a regular click handler to that element which will cancel propagation of the event (see stopPropagation) and will set a timeout (setTimeout(...)) for, say, 600ms (default time between two clicks to be deemed a dbl-click is 500ms [src]). If, by that time the dblclick has not occurred (you can have a var accessible in both event handlers that acts as a flag to detect this) then you can assume the user wants to expand the row instead and continue with that action...

IMO, you should re-think this. Alas, a single click handler cannot know if the user is about to double-click.

I suggest making both actions single click, and simply don't propagate up from the editable field when it is clicked.

I wrote a simple jQuery plugin that lets you use a custom 'singleclick' event to differentiate a single-click from a double-click. This allows you to build an interface where a single-click makes the input editable while a double-click expands it. Much like Windows/OSX filesystem rename/open UI.

https://github.com/omriyariv/jquery-singleclick

$('#someInput').on('singleclick', function(e) {
    // The event will be fired with a small delay but will not fire upon a double-click.
    makeEditable(e.target);
}

$('#container').on('dblclick', function(e) {
    // Expand the row...
}

window.UI = {
  MIN_LAPS_FOR_DBL_CLICK: 200, // msecs

  evt_down:null,
  timer_down:null,
  mousedown:function(evt){
    if( this.evt_down && evt.timeStamp < this.evt_down.timeStamp + this.MIN_LAPS_FOR_DBL_CLICK ){
      clearTimeout(this.timer_down);
      this.double_click(evt); // => double click
    } else {
      this.evt_down   = evt;
      this.timer_down = setTimeout("UI.do_on_mousedown()", this.MIN_LAPS_FOR_DBL_CLICK);
    }
  },
  evt_up:null,
  timer_up:null,
  mouseup:function(evt){
    if( this.evt_up && evt.timeStamp < this.evt_up.timeStamp + this.MIN_LAPS_FOR_DBL_CLICK ){
      clearTimeout(this.timer_up);
    } else {
      this.evt_up   = evt;
      this.timer_up = setTimeout("UI.do_on_mouseup()", this.MIN_LAPS_FOR_DBL_CLICK);
    }
  },
  do_on_mousedown:function(){
    var evt = this.evt_down;
    // Treatment MOUSE-DOWN here
  },
  do_on_mouseup:function(){
    var evt = this.evt_up;
    // Treatment MOUSE-UP here
  },
  double_click:function(evt){
    // Treatment DBL-CLICK here
  }

}

// Then the observers

$('div#myfoo').bind('mousedown',  $.proxy(UI.mousedown, UI));
$('div#myfoo').bind('mouseup',    $.proxy(UI.mouseup, UI));

This example in vanilla javascript should work:

var timer = 0
var delay = 200
var prevent = false

node.onclick = (evnt) => {
    timer = setTimeout(() => {
         if(!prevent){
             //Your code
         }
         prevent = false
    }, delay)
}
node.ondblclick = (evnt) => {
    clearTimeout(timer)
    prevent=true
    //Your code
}

Adding to answer from @puttyshell, this code has space for a visualSingleClick function. This run before setTimeout and is intended to show user some visual action for the action before the timeout, and with that I can use a greater timeout. I'm using this on a Google Drive browsing interface to show user that file or folder that he clicked is selected. Google Drive itself does something similar, but don't saw it code.

/* plugin to enable single and double click on same object */
$.singleDoubleClick = function(visualSingleClk, singleClk, doubleClk) {
  return (function() {
    var alreadyclicked = false;
    var alreadyclickedTimeout;

    return function(e) {
      if (alreadyclicked) {
        // double
        alreadyclicked = false;
        alreadyclickedTimeout && clearTimeout(alreadyclickedTimeout);
        doubleClk && doubleClk(e);
      } else {
        // single
        alreadyclicked = true;
        visualSingleClk && visualSingleClk(e);
        alreadyclickedTimeout = setTimeout(function() {
          alreadyclicked = false;
          singleClk && singleClk(e);
        }, 500);
      }
    }
  })();
}

There is a more elegant way handling this issue if you're using backbonejs:


    initialize: function(){
        this.addListener_openWidget();
    }

    addListener_openWidget: function(){
        this.listenToOnce( this, 'openWidgetView', function(e){this.openWidget(e)} );
    },

    events: {
        'click #openWidgetLink' : function(e){this.trigger('openWidgetView',e)},
        'click #closeWidgetLink' : 'closeWidget'
    },

    openWidget: function( e ){
       //Do your stuff
    },

    closeWidget: function(){
       this.addListener_openWidget();
    }
标签
javascript
jquery
events
event-bubbling
propagation
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