JQuery-UI draggable reset to original position

问题:

This is probably very easy to do, but I always think too complicated.

I've just set up a simple test with #draggable / #droppable with a fixed width/height + float:left.

I then want a reset button to be able to reset the #draggable to it's original state after it's been snapped to a #droppable. (bottom line)

$(document).ready(function() {

    $("#draggable").draggable
    ({  
        revert: 'invalid',
        snap: '#droppable',
        snapMode: 'corner',
        snapTolerance: '22'

    });
});

    $("#droppable").droppable
    ({
        accept: '#draggable', 
        drop: function(event, ui) 
        {
            $(this).find("#draggable").html();
        }
});

    $(".reset").click(function() {
    /* What do I put here to reset the #draggable to it's original position before the snap */
});

回答1:

Draggable items don't keep track of their original position that I know of; only during drag and to be snapped back. You can just do this on your own, though:

$("#draggable").data({
    'originalLeft': $("#draggable").css('left'),
    'origionalTop': $("#draggable").css('top')
});

$(".reset").click(function() {
    $("#draggable").css({
        'left': $("#draggable").data('originalLeft'),
        'top': $("#draggable").data('origionalTop')
    });
});

http://jsfiddle.net/ExplosionPIlls/wSLJC/

回答2:

I used this on a project

$("#reset").click(function () {
    $(".draggable-item").animate({
        top: "0px",
        left: "0px"
    });
});

did the trick for me

回答3:

I've just had great success with the following:

$(".draggable-item").removeAttr("style");

回答4:

I used h0dges' basic idea. The balls I created returned to their original positions, but I lost the styles that made them into balls. Therefore, I kept the styles of the balls and just reset their top and left styles to return them to their original positions:

function endRound() {
   $(".ball").css({"top":"", "left":""});
}

回答5:

I found that the following was the simplest way to reset to original position, but if you want the item to remain draggle this will not work alone

$(".draggable-item").removeAttr('style');

This worked for me to reset to original position and keep item draggable:

$("#reset").click(function () {
    // Reset position
    $(".draggable-item").removeAttr('style');

    // Destroy original draggable and create new one
    $(".draggable-item").draggable("destroy");
    $(".draggable-item").draggable();
});