javascript - Jquery UI 自动完成组合框按钮单击事件

Question

我在使用 jquery ui autocomplete when using it to create a combobox 时遇到了奇怪的行为.每当我单击滚动条滚动结果列表然后单击我的组合框按钮关闭结果时，结果列表将关闭然后再次打开。我希望它能关闭菜单。

重现步骤

1. open jsfiddle demo
2. 在自动完成中输入“i”或点击下拉按钮。
3. 点击垂直滚动滚动结果
4. 点击下拉按钮

创建按钮的脚本

 this.button = $("<button type='button'>&nbsp;</button>")
    .attr({ "tabIndex": -1, "title": "Show all items" })
    .insertAfter(input)
    .button({
         icons: {
             primary: "ui-icon-triangle-1-s"
         },
         text: false
    })
    .removeClass("ui-corner-all")
    .addClass("ui-corner-right ui-button-icon")
    .click(function () {

        // when i put breakpoint here, and my focus is not on input, 
        // then this if steatment is false????

        if (input.autocomplete("widget").is(":visible")) {
            input.autocomplete("close");
            return;
        }

        // work around a bug (likely same cause as #5265)
        $(this).blur();

        // pass empty string as value to search for, displaying all results
        input.autocomplete("search", "");
        input.focus();
});

CSS(强制长结果菜单滚动)

.ui-autocomplete {
    max-height: 100px;
    overflow-y: auto;
    /* prevent horizontal scrollbar */
    overflow-x: hidden;
    /* add padding to account for vertical scrollbar */
    padding-right: 20px;
}
/* IE 6 doesn't support max-height
 * we use height instead, but this forces the menu to always be this tall
 */
* html .ui-autocomplete {
    height: 100px;
}

我的解决方案可能是关闭小部件，即使焦点转移到小部件本身而不是输入元素？

有什么想法可以修改此代码以使其以这种方式运行吗？

Answer 1

基于自动完成小部件的各种单击和鼠标事件的问题，我想到了这个: jsFiddle example .

jQuery:

var input = $('#txtComplete');

var data = [];
var isOpen = false;

function _init() {
    for (var idx = 0; idx <= 100; idx++) {
        data.push('item: ' + idx);
    };
    input.autocomplete({
        source: data,
        minLength: 0,
        open: function(event, ui) {
            isOpen = true;
        },
        select: function(event, ui) {
            isOpen = false;
        }
    });
}

function afterInit() {
    var button = $("<button type='button'>&nbsp;</button>").attr("tabIndex", -1).attr("title", "Show all items").insertAfter(input).button({
        icons: {
            primary: "ui-icon-triangle-1-s"
        },
        text: false
    }).removeClass("ui-corner-all").addClass("ui-corner-right ui-button-icon").click(function(event) {
        input.focus();
        if (isOpen) {
            input.autocomplete("close");
            isOpen = false;
        } else {
            input.autocomplete("search", "");
            event.stopImmediatePropagation();
        }
    });
}
$(window).click(function() {
    input.autocomplete("close");
    isOpen = false;
});
$(function() {
    _init();
    afterInit();
});​