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单选按钮

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Microsoft Windows上使用传统配色的单选按钮例子,括号内的为快捷键

单选按钮(英语:Radio button),又叫单选钮单选框,是图形用户界面上的一种控件。它容许用户在一组选项中选择其中一个。单选按钮的外观一般是一个空白的洞。而在它的旁边则通常有一个文字的标签。它的用途除了描述之外,还可用于选择该选择:当用户按下标签,就会选取对应应的单选按钮。已选上的单选按钮一般会在圆洞内加上一小圆点。

另外为了加强可亲性accessibility),单选按钮可以对应上一个快捷键access key),使用家可使用键盘上的按键来选择所应的单选按钮。一般来说,标签上的快捷键会用下划线标示,例如“Activate”代表A为快捷键。而当快捷键没有在标签内出现,便会用括号表示,例如“激活(A)”。

单选按钮一旦选上,除了选择另一个选项之外,便没法取消。所以有时在一些用户界面上会有空白的选择、重置或默认按钮。

当选项很多时,单选下拉菜单可能比较适合,因为它所占用的画面空间比单选按钮来得要少。

参见


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单选按钮
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