默认选择按钮extjs4.1

Question

我有两组按钮(在Extjs 4.1中)，一次只能选中一个。问题是，我希望在开始时(当网格加载时)检查其中一个。代码如下：

{
    xtype : 'checkboxgroup',
    store : checked,
    columns : 3,
    vertical : false,
    singleSelect: true,
    items : [
        {
        xtype: 'button',
        text: 'name',
        width: 75,
        toggleGroup: 'mygroup',
        enableToggle: true,
        listeners: {
                click: function(th) {
                //this == the button, as we are in the local scope
                    checked = [1,0,0];
                }}
        }, {
        xtype: 'button',
        text: 'buyer_member_id',
        width:100,
        toggleGroup: 'mygroup',
        enableToggle: true,
        listeners: {
                click: function(th) {
                //this == the button, as we are in the local scope
                    checked = [0,1,0];
                }}
        }, {
        xtype: 'button',
        text: 'id',
        width: 50,
        toggleGroup: 'mygroup',
        enableToggle: true,
        listeners: {
                    click: function(th) {
                //this == the button, as we are in the local scope
                    checked = [0,0,1];
                }}
        }
    ]}

我找到了一些帮助in the Sencha forum，但是我不能解决这个问题。

Answer 1

这就是这个词：

    pressed: true,

插入到按钮配置说明中。