我正在尝试让多嵌套手风琴控件与 Knockout 一起使用,但是在添加面板时,通过 KO 绑定创建的项目不会与手风琴作为新面板绑定。
代码如下所示:
<div data-bind="accordion: {collapsible: true, active: false, heightStyle: 'content'}, template: { name: 'queryTemplate', foreach: children }">
</div>
<script id="queryTemplate" type="text/html">
<h3>
<div>
<a href="#" data-bind="text: id"></a>
<span data-bind="text: name"></span>
<button data-bind="click: addNext">Add Next Item</button>
</div>
</h3>
<div >
<input data-bind="value: name"></input>
<input data-bind="value: id"></input>
<button data-bind="click: addSubitem">Add SubItem</button>
<hr/>
<div data-bind="accordion: {collapsible: true, active: false, heightStyle: 'content'}, template: { name: 'queryTemplate', foreach: children }">
</div>
</div>
</script>
<script>
ko.bindingHandlers.accordion = {
init: function(element, valueAccessor) {
var options = valueAccessor() || {};
setTimeout(function() {
$(element).accordion(options);
}, 0);
//handle disposal (if KO removes by the template binding)
ko.utils.domNodeDisposal.addDisposeCallback(element, function(){
$(element).accordion("destroy");
});
},
update: function(element, valueAccessor) {
var options = valueAccessor() || {},
existing = $(element).data("accordion");
//if it has been reinitialized and our model data changed, then need to recreate until they have a "refresh" method
if (existing) {
$(element).accordion("destroy").accordion(options);
//$(element).accordion("refresh");
}
}
};
function Item(id, name, parent) {
var self = this;
this.id = ko.observable(id);
this.name = ko.observable(name);
this.children = ko.observableArray();
this.addSubitem = function(){
self.children.push(new Item(self.children().length + 1, "", this));
}
this.parent = ko.observable(parent);
this.addNext = function(){parent.addSubitem()};
}
var model = new Item(0, "Top");
var tmp = new Item(1, "First", model);
tmp.children.push(new Item(0, "SubItem!", tmp));
model.children.push(tmp);
tmp = new Item(2, "Second", model);
tmp.children.push(new Item(0, "SubItem!", tmp));
model.children.push(tmp);
ko.applyBindings(model);
</script>
我的印象可能是由于我如何构建模板循环,但我对此束手无策 - 谢谢大家
笔记:
我会尝试澄清我遇到的问题 - (这里是小提琴:http: //jsfiddle.net/QChon/aUJFg/4/)
手风琴和嵌套手风琴按照视图模型正确加载(带有“子”数组的项目再次包含项目对象,应该无限期地继续)。
“添加下一个项目”按钮将同级添加到当前项目,因此添加到当前手风琴面板,“添加子项目”将子项添加到当前项目的子项,因此当前面板下的嵌套手风琴面板。
问题是,当我单击按钮时,正确的 html 元素会添加到正确的位置(即作为标题和内容面板),但 jquery 类和 id 未绑定到创建的 html 控件,因此不渲染也不作为手风琴结构的一部分,行为正确。希望能有所澄清。