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我有以下的定制Dojo小部件:如何打开从dijit/_HasDropDown以编程方式从封装小部件继承的dojo小部件?
<div class="${baseClass}">
<div data-dojo-type="dijit/TitlePane" data-dojo-props="title:'${prefixTitle}', open:false" id="titleNodePane">
<div id="container"
class="${baseClass}Container"
data-dojo-attach-point="containerNode"></div>
</div>
</div>
有了这个代码:
/**
* Javascript for ExpandableSearchComponent
*/
define([ "dojo/_base/declare", "dijit/_WidgetBase", "dijit/_TemplatedMixin",
"dojo/text!./templates/ExpandableSearchComponent.html",
"dijit/TitlePane", "dijit/_WidgetsInTemplateMixin", "dijit/registry",
"dojo/on", "dojo/aspect", "dojo/_base/lang" ], function(declare,
_WidgetBase, _TemplatedMixin, template, TitlePane,
_WidgetsInTemplateMixin, registry, on, aspect, lang) {
return declare([ _WidgetBase, _TemplatedMixin, _WidgetsInTemplateMixin ], {
templateString : template,
prefixTitle : "",
containedWidgetId : "",
that : this,
startup : function() {
this.inherited(arguments);
var containedWidget = registry.byId(this.containedWidgetId);
var titlePane = registry.byId("titleNodePane");
this.own(on(titlePane, "Show", function() {
containedWidget.openDropDown();
}.bind(containedWidget)));
//Other logic
}
});
});
据声明如下:
<div data-dojo-type="js/widgets/ExpandableSearchComponent"
data-dojo-props="prefixTitle: 'Name: ', containedWidgetId: 'machineSearchView.name'">
<!-- Other elements including the machineNameStore-->
<div data-dojo-type="dijit/form/ComboBox"
data-dojo-props="store:machineNameStore, searchAttr:'name', value:'${MachineName}'"
name="machineSearchView.name" id="machineSearchView.name"></div>
</div>
它的工作原理几乎完全,除1件事:on(titlePane, "Show", function(){})
。这是为了打开包含扩展_HasDropDown的小部件的下拉菜单。我在_HasDropDown的第139行上收到错误Uncaught TypeError: Cannot read property 'domNode' of null
。很显然,在TitlePane完全展开之前,不会设置this.dropDown,这会打破openDropDown()
。
是有办法解决这一问题?
你试过调用loadAndOpenDropDown()而不是openDropDown()吗? – pgianna
@pgianna修复它。我不敢相信这很简单。你可以把它作为答案发布,所以我可以给你25分吗? – Nzall