如何在dijit.form.Select中禁用单个选项？ [英] How to disable a single option in a dijit.form.Select?

问题描述

我使用 dijit.form.Select 创建了2个Dojo下拉列表，我正在填充2个ArrayLists。当用户从第一个下拉列表中选择一个选项时，我希望第二个下拉列表中的一个选项被禁用。我似乎无法弄清楚如何做到这一点。是否可以通过编程方式从下拉列表中禁用单个选项？
这样的东西...

I created 2 Dojo dropdowns using dijit.form.Select that I am populating with 2 ArrayLists. When a user selects an option from the 1st dropdown, I would like an option in the 2nd dropdown to disable. I can't seem to figure out how to do this. Is it possible to disable a single option from the dropdown programatically? Something like...

if(this.dropDown1.get("value") == "FirstOption") {
    //this.dropDown2.get("value", "AnotherOption").set("disabled", true); ??
}

推荐答案

尝试检索您的价值想要从dropDown2，并将其禁用的属性设置为true，直接（没有设置器，它只是一个简单的JavaScript对象）。然后调用dropDown2.startup（）来在UI上进行更改。示例：

Try to retrieve the value you want from dropDown2, and set its disabled property to true, directly (there is no setter, it's just a plain javascript object). Then call dropDown2.startup() to make the changes on the UI. Example :

require(["dojo/_base/array"], 
function(array) { 

    var self = this,

    opt = array.filter(
                  self.dropDown2.options, 
                  "return item.value == '" + self.dropDown2.get("value") + "'"
              ).pop(); 

    opt.disabled = true;

    this.startup();

});

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