javascript-如何防止可拖动的子元素彼此拖动？

如何防止可拖动子元素在绝对位置上相互拖动？
就像是：

if( ($("#firstChild").position().left) >= ($("#secondChild").position().left) )
{
    $(this).draggable({ disabled: true });
}

但这只会在停止拖动时禁用Dragabble,目的是防止以某种方式过度拖动…或使用Droppable ???

对案例2有什么想法吗？

编辑：

此外,这对于child1朝向child2来说是最大的,因此不会发生重叠,但是child1可以将child2推向右侧,child2可以将child1推向左侧,重要的是不会发生重叠！

解决方法:

为了达到最佳解决方案,请注意以下几点：

>您已经声明并初始化了allBetween variablw,但没有使用它.我建议将其删除.
>在#buttonOne事件监听器上,您使用的值不一致：429和424：if($(“#firstInput”).val()> 429)$(“#firstInput”).val(424);

>您多次使用#firstInput(和#thirdInput)选择器,而不缓存引用.
>您正在复制每个按钮的功能.一个更好的,不太容易出错的解决方案是创建一种方法来构建这些方法.

最终代码

优化已在前面进行了解释.我不会详细说明它们,因为这不是问题的主题.我已经在脚本注释中解释了请求的行为的功能逻辑(如下).

$(document).ready(function() {
    // Helper to easily bind related events to the button.
    function createButtonClickEvent(sel_selector, input_selector, left_limit, right_limit) {
        return function(){
            var $sel = $(sel_selector),
                $input = $(input_selector),
                val = $input.val();
            if (val > right_limit) input.val(val = right_limit);
            else if (val < left_limit) input.val(val = left_limit);
            $sel.css('left', val + "px");

            var $allElems = $("#second").children(".single"),
                 $between = $allElems.inRangeX("#selFirst", "#selSecond");
            $allElems.removeClass("ui-selected");
            $between.addClass("ui-selected");
        }
    }
       //setValue 1
    $("#buttonOne").click(createButtonClickEvent("#selFirst", "#firstInput", 0, 429));    
    //setValue2
    $("#buttonTwo").click(createButtonClickEvent("#selSecond", "#thirdInput", 0, 429));


    //graph values
    var valuesG = [],
        $elements = $();
    for (i = 0; i < 144; i++) {
        valuesG[i] = Math.floor(Math.random() * (30 - 20 + 1) + 10);
        $elements = $elements.add($("<div class='single'>")
                             .css('height', valuesG[i])
                             .css('margin-top', 30 - valuesG[i]));
    }
    $elements.appendTo($("#second"));
    $("#second").children(".single").addClass("ui-selected");

    //inRangeX (https://stackoverflow.com/a/8457155/938089)
    (function($) {
        $.fn.inRangeX = function(x1, x2) {

            if (typeof x1 == "string" && +x1 != x1 || x1 instanceof Element) {
                x1 = $(x1);
            }
            if (typeof x2 == "string" && +x1 != x1 || x1 instanceof Element) {
                x2 = $(x2);
            }

            if (x1 instanceof $) {
                x1 = x1.offset().left;
            }
            if (x2 instanceof $) {
                x2 = x2.offset().left;
            }
            x1 = +x1;
            x2 = +x2;


            if (x1 > x2) {
                var x = x1;
                x1 = x2;
                x2 = x;
            }
            return this.filter(function() {
                var $this = $(this),
                    offset = $this.offset(),
                    rightSide = offset.left - 5;
                return offset.left >= x1 + 5 && rightSide <= x2;
            });
        }
    })(jQuery);

    //firstPositions
    var startFirst = $(".selector#selFirst").position().left;
    var startSecond = $(".selector#selSecond").position().left;
    $('input#firstInput').val(startFirst);
    $('input#thirdInput').val(startSecond);

    // *********** Actual requested code *********** //
    //first and second-Picker
    var $selFirst = $("#selFirst"),
        $selSecond = $("#selSecond"),
        cachedWidth = $selFirst.outerWidth();

    function drag_function(event, ui){
        var $firstRightBorder = $selFirst.position().left + cachedWidth,
             $secondLeft = $selSecond.position().left,
             diff = $firstRightBorder - $secondLeft;
        /*
         * The logic is as follows:
         * dif < 0 if selFirst and selSecond do not overlap
         * dif = 0 if they're next to each other
         * dif > 0 if they overlap each other
         * To fix this (reminder: if they overlap, dif is negative):
         * If current == #selFirst,
         *    left = left + dif
         * else (if current == #selSecond),
         *    left = left - dif
         */
        if (diff > 0) {
            var currentLeft = parseFloat($(this).css("left"));
            if (this.id == "selSecond") diff = -diff;
            ui.position.left = currentLeft - diff;
            ui.helper.css("left", currentLeft - diff);
        }
        var $allElems = $("#second").children(".single"),
            $between = $allElems.inRangeX("#selFirst", "#selSecond");
        $("#firstInput").val($("#selFirst").position().left);
        $("#thirdInput").val($("#selSecond").position().left);
        $allElems.removeClass("ui-selected");
        $between.addClass("ui-selected");
        var allBetween = $('.ui-selected');
    }

    $("#selFirst, #selSecond").draggable({
        containment: 'parent',
        axis: 'x',
        drag: drag_function,
        stop: drag_function
    });
}); //eof

标签：jquery-ui-draggable,jquery-ui,collision-detection,javascript,jquery
来源： https://codeday.me/bug/20191202/2084957.html