Why Doesn\'t My Swing JTabbedPane Update its Look and Feel After Changing the UIManager?-javaTutorial-php.cn

Why Doesn\'t My Swing JTabbedPane Update its Look and Feel After Changing the UIManager?

Susan Sarandon

Release： 2024-11-30 16:36:11

Original

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Why Doesn't My Swing JTabbedPane Update its Look and Feel After Changing the UIManager?

Look and Feel Not Updating in Swing JTabbedPane

When altering the look and feel of a Java Swing application using a menu, changes may not be reflected in a newly added JTabbedPane. Despite utilizing SwingUtilities.updateComponentTreeUI(), the issue persists.

The solution involves updating the UI of the entire frame, including any JTabPanes within it:

Window windows[] = Frame.getWindows();
for(Window window : windows) {
    SwingUtilities.updateComponentTreeUI(window);
}

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By extending this concept, a more robust implementation can be achieved. Here's an example that dynamically updates the look and feel of a Swing application, including any JTabPanes:

public class JTabbedText {

    // ... (code omitted for brevity)

    private static JToolBar createToolBar(final Component parent) {
        // ... (code omitted for brevity)

        combo.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                int index = combo.getSelectedIndex();
                try {
                    UIManager.setLookAndFeel(
                        available[index].getClassName());

                    // Update the UI of all windows
                    Window[] windows = Window.getWindows();
                    for (Window window : windows) {
                        SwingUtilities.updateComponentTreeUI(window);
                    }
                } catch (Exception e) {
                    e.printStackTrace(System.err);
                }
            }
        });

        // ... (code omitted for brevity)
    }

    // ... (code omitted for brevity)
}

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This approach ensures that changes to the look and feel will propagate to all parts of the application, including JTabPanes, providing a consistent user experience.

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