通过聚合物核心页面组件指定默认的flatiron-director路径(内部元素)

时间:2014-09-09 21:58:10

标签: javascript polymer core-elements flatiron.js

此问题与:flatiron-director / core-pages SPA with route specific js functions & default route直接相关。我确信解决方案有效,但我对聚合物(和js)缺乏经验,无法在我的环境中确定正确的事件监听器:

如果在聚合物元素中使用flatiron-director,特别是当元素的模板本身不使用时,如何/在何处指定适当的事件监听器来设置默认路由= =“自动绑定”。在这种情况下,要明确的是,导入下面显示的元素的index.html页面确实使用is =“auto-binding”指定了一个模板。

这是显示我尝试传达/实现的内容的元素代码。 flatiron路由工作正常(如果我手动将#itemsList或#itemOpen输入到URL并使用浏览器上一个或下一个按钮),但是当它自己点击index.html时,它不会自动将默认的#itemsList添加到URL: / p>

<polymer-element name="my-app" attributes="user items connected">

<template>

    <flatiron-director id="page-director" route="{{route}}" autoHash on-director-route="{{ routeChanged }}"></flatiron-director>

    <!-- HIGH LEVEL APP LAYOUT ELEMENT -->
    <core-header-panel id="appHeader" mode="standard">

        <!-- OUTER APP TOOLBAR ELEMENT -->
        <core-toolbar id="appToolbar">
            <paper-icon-button id="navicon" icon="arrow-back" on-tap="{{ showItems }}"></paper-icon-button>
            <span flex>App Name</span>
            <paper-icon-button id="searchbutton" icon="search"></paper-icon-button>
        </core-toolbar>

        <!-- MAIN CONTENT ELEMENTS -->

        <!-- ATTEMPT FLATIRON ROUTING -->
        <core-pages id="mainPages" selected="{{route}}" valueattr="name">

            <my-items-element name="itemsList" on-core-activate="{{ itemSelect }}" user="{{user}}" items="{{items}}" item="{{item}}"></my-items-element>

            <item-open-scaffold-element name="itemOpen" user="{{user}}" item="{{item}}" hidden></item-open-scaffold-element>

        </core-pages>


    </core-header-panel>

</template>

<script>
    Polymer('my-app', {

        route: "itemsList",

        itemSelect: function(e, detail, sender) {
            if (sender.shadowRoot.activeElement == null || sender.shadowRoot.activeElement.nodeName != "PAPER-MENU-BUTTON"){
                // Ensure the user hasn't clicked on the item menu dropdown to perform alternative actions (or another element with actions for that matter)
                // (i.e. make sure the user intends to open the item)
                this.openItem();
            }
        },

        openItem: function() {
            this.$.mainPages.children.itemOpen.hidden = false;
            this.$.mainPages.selected = "itemOpen";
            //this.route = "scaffoldPage";
        },

        showItems: function() {
            this.$.mainPages.children.itemOpen.hidden = true;
            this.$.mainPages.selected = "itemsList";
        }
    });
</script>

<script>
    var template = document.querySelector('template');

    template.addEventListener('template-bound', function() {
        this.route = this.route || "itemsList";
    });
</script>

1 个答案:

答案 0 :(得分:1)

如Jeff所述,使用ready()生命周期方法作为元素之外的template-bound事件的元素内部元素。所以......基于上面的例子,它就像在聚合物元素的ready()中包含以下行一样简单:

this.route = this.route || "itemsList"