覆盖外观 [英] Overriding LookAndFeel

问题描述

你好，我试图在Java中更改我的挥杆进度条的颜色. 最初，我尝试使用以下代码:

Hello I am trying to change the colors of my swing progress bar in java. Initially I tried using the following code:

UIManager.put("ProgressBar.selectionBackground", Color.black);
UIManager.put("ProgressBar.selectionForeground", Color.white);
UIManager.put("ProgressBar.background", Color.white);
UIManager.put("ProgressBar.foreground", Color.RED);
m_progressBar.setBackground(Color.BLACK);
m_progressBar.setForeground(Color.red);

但是这些命令似乎都没有任何作用！！！ 除非我设置m_progressBar.stringPainted(true)，否则前景会发生变化.

But none of the commands seemed to have any effect!!! Unless I set m_progressBar.stringPainted(true) and then the foreground does change.

无论如何，我知道问题是由以下命令引起的:UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); 会在初始化UI之前调用它.

Anyhows I know that the problem arises from the following command: UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); which is invoked before the UI is initialized.

所以我的问题是:
1)出于好奇:stringPainted(true)调用为何设法覆盖前台UI设置?
2)如何在代码开头保留UIManager.setLookAndFeel并仍然覆盖UI设置?

So my questions are:
1) Out of curiosity: why does the the stringPainted(true) invocation manages to override foreground UI settings?
2) How do I keep UIManager.setLookAndFeel in the beginning of the code and still override UI settings?

谢谢！

推荐答案

尝试一下…….......

Try this.............

`Changing the Look and Feel After Startup`

You can change the L&F with setLookAndFeel even after the program's GUI is visible. To make existing components reflect the new L&F, invoke the SwingUtilities updateComponentTreeUI method once per top-level container. Then you might wish to resize each top-level container to reflect the new sizes of its contained components.

例如:

UIManager.setLookAndFeel(lnfName);
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();

换句话说:您可以更改顶级容器的外观(我还没有测试过它是否仅限于顶级容器，或者是否可以将此方法应用于任何容器).或者，甚至可以更精确地回答您的问题:我看不到有一种样式设置单个组件的方法，但是有一种方法可以在(顶层)容器中使用单个组件.

In other words: you can change the look and feel of a top-level container (I don't have tested if it is limited to top-level containers only or if this method can be applied to any container). Or, to answer your question even more precisely: I don't see there's method of styling a single component, but there is a way for single components in (toplevel) containers.

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