如何对齐火花按钮？

Question

这是情景：

<s:layout>
    <s:VerticalLayout verticalAlign="top" horizontalAlign="center" paddingTop="30"/>
</s:layout>
<s:states>
    <s:State name="Login"/>
    <s:State name="Register"/>
</s:states>
<s:Panel id="loginPanel" title="Login Form" title.Register="Registration Form" height="400" width="300" color="Black">   

    <s:Form top="0" bottom="0"
            left="20" right="0">
        <s:FormItem label="First Name:" includeIn="Register" color="White">
            <s:TextInput id="firstName" color="Black"/>
        </s:FormItem>
        <s:FormItem label="Last Name" includeIn="Register" color="White">
            <s:TextInput id="lastName" color="Black" />
        </s:FormItem>
        <s:FormItem label="Email:" includeIn="Login, Register" color="White">
            <s:TextInput id="email" color="Black" />
        </s:FormItem>
        <s:FormItem label="Password:" includeIn="Login, Register" color="White">
            <s:TextInput id="password" color="Black" displayAsPassword="true"/>
        </s:FormItem>
        <s:FormItem label="Conform:" includeIn="Register" color="white">
            <s:TextInput id="confirm" color="Black" displayAsPassword="true"/>
        </s:FormItem>
        <s:FormItem >
                <s:Button label="Need To Register" id="needToRegister" includeIn="Login" click="currentState='Register'" left="0"/>
                <s:Button label="Return To Login" id="returnToLogin" includeIn="Register" click="currentState='Login'"/>
                <s:Button label="Login" id="login" 
                          label.Register="Register" click="loginFun()" 
                          click.Register="register()"/>

            </s:FormItem>
    </s:Form>

问题是如何按水平顺序对齐按钮？我试过HGroup。但是当我们使用HGroup时，按钮是不合理的。如果还有其他内容，请与我分享。

提前致谢。

修改

我做到了。

            <s:FormItem >
                <s:layout>
                    <s:HorizontalLayout gap="30" paddingLeft="-15"/>
                </s:layout>

                <s:Button label="Need To Register" id="needToRegister" 
                          includeIn="Login" />
                <s:Button label="Return To Login" id="returnToLogin" includeIn="Register" />
                <s:Button label="Login" id="login" 
                          label.Register="Register"/>

            </s:FormItem>

现在它的工作。但我不知道。这是一种正确的方法。谁能告诉我这是一个好方法呢？