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如何在对话框顶部布局一个面板，使其具有两个按钮？

发布于 2024-07-26 03:21:52 字数 215 浏览 12 评论 0原文

我需要在对话框顶部布局一个面板，以便它有两个按钮（保存和取消）。

我希望保存位于左侧，取消位于右侧。

我已经使用 MigLayout 创建了一个 JPanel，并将其停靠在内容窗格的北部，但我一生都无法弄清楚如何向其中添加两个按钮，以便它们按照我想要的方式显示。将它们停靠在面板中似乎消除了对话框中的所有填充（这看起来很糟糕）。

任何帮助将不胜感激。

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殤城〤 2024-08-02 03:21:52

顺便说一句，您可能不应该指定哪个按钮位于左侧或右侧。这是 MiGLayout 的酷炫之处之一（平台独立性，甚至在诸如取消按钮应该放在哪里之类的事情上）。

p.add(cancelButton, "tag cancel");
p.add(okButton, "tag ok");

现在，按钮将根据平台以正确的顺序显示。

这是一篇文章，其中的代码可以实现您想要的功能。我强烈建议避免尝试强制按钮等组件的大小（这些实际上应该来自平台的外观和感觉）。另外，如果这样做有意义的话，对接也是可以的，但我很少发现有必要这样做。无需为按钮构建完全独立的面板，只需跨越包含按钮的行即可 - 更加干净，并且您不会最终得到所有嵌套面板。

很难摆脱嵌套面板的边框布局技术，但一旦掌握了它，MigLayout 就是一个梦想。顺便说一句 - 我知道有时您可能希望在库中构建按钮面板 - 如果是这种情况，那么单独的面板可能是有意义的（尽管您也可以让库向现有面板添加按钮行，而不是返回一个面板，然后将其添加到布局中）。

As an aside, you should probably not be dictating which button is on the left or right. That's one of the way cool things about MiGLayout (platform independence, even on things such as where the cancel button should go).

p.add(cancelButton, "tag cancel");
p.add(okButton, "tag ok");

Now the buttons will appear in the correct order, based on platform.

Here's an article with code doing what you are going for. I strongly recommend avoiding trying to force the size of components like buttons (these really should come from the platform look and feel). Also, docking is fine if it makes sense to do so, but I rarely find it to be necessary. Instead of building a totally separate panel for your buttons, just span the row that contains the buttons - much cleaner, and you don't wind up with all of the nested panels.

It's hard to break from the border layout technique of nested panels, but once you get the hang of it, MigLayout is a dream. BTW - I understand that there are times where you might want to build up the button panel in a library - if that's the case, then separate panels may make sense (although you could also have the library add a button row to an existing panel, instead of returning a panel that you then add to the layout).

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羞稚 2024-08-02 03:21:52

哦，每当你提出问题时，答案总是会弹出：

JPanel buttonPanel = new JPanel(new MigLayout("fill","[50][50]",""));
buttonPanel.add(saveChangesButton);
buttonPanel.add(cancelButton, "align right");
getContentPane().add(buttonPanel, "dock north");

请注意，内容窗格也使用 MigLayout。

Doh, always happens as soon as you ask a question, the answer pops out:

JPanel buttonPanel = new JPanel(new MigLayout("fill","[50][50]",""));
buttonPanel.add(saveChangesButton);
buttonPanel.add(cancelButton, "align right");
getContentPane().add(buttonPanel, "dock north");

Note that the content pane is using the MigLayout too.

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