java 如何在 Swing 中的组件边框外添加边距？
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How do I add a margin outside the border of a component in Swing?
提问by Jonas
I use multiple components that has a border painted. Is there any easy way to add a margin to the component so that the borders aren't painted so close to eachother?
我使用了多个带有边框的组件。有没有什么简单的方法可以为组件添加边距，以便边框不会彼此靠近？
采纳答案by Alex B
This is typically done using your layout manager. For example, if you are using GridBagLayout, you would set insetson the GridBagConstraintobject to the desired value.
这通常是使用您的布局管理器完成的。例如，如果你正在使用GridBagLayout，您将设置insets在上GridBagConstraint对象为需要的值。
Another option is to use the Boxobject and add a horizontal or vertical struct. See javadocfor Box.createVerticalStrut( int width )and the similar createHorizontalStrut.
另一种选择是使用Box对象并添加水平或垂直结构。请参阅的javadoc的Box.createVerticalStrut( int width )和类似的createHorizontalStrut。
回答by jfpoilpret
Another way to get what you want is to:
获得你想要的东西的另一种方法是：
- get the current
Borderof your component - if
null, set anEmptyBorderfor your component - if not
null, create a newCompoundBorder(with anEmptyBorderand the currentBorderof the component) and set it for the component
- 获取
Border组件的电流 - 如果
null，EmptyBorder为您的组件设置一个 - 如果没有
null，则创建一个新的CompoundBorder（带有一个EmptyBorder和当前Border组件的）并为该组件设置它
In code, that should look like that (sorry I haven't tested it):
在代码中，它应该是这样的（抱歉我没有测试过）：
Border current = component.getBorder();
Border empty = new EmptyBorder(top, left, bottom right);
if (current == null)
{
component.setBorder(empty);
}
else
{
component.setBorder(new CompoundBorder(empty, current));
}
Where:
在哪里：
- component is the Swing component to which you want to add a margin
- top, left, bottom, right are the pixels amounts you want to add around your component
- component 是要添加边距的 Swing 组件
- 顶部、左侧、底部、右侧是您要在组件周围添加的像素数量
Note that this method might have an impact (size, alignment) on the form layout, depending on the LayoutManageryou are using. But I think it is worth trying.
请注意，此方法可能会对表单布局产生影响（大小、对齐方式），具体取决于LayoutManager您使用的内容。但我认为值得一试。
