JTable has inconsistent design between different themes #750
Description
Dear Friends,
I've come to realize that the JTable component isn't fully consistent and stable between different themes.
I'm not entirely sure of how I could describe the issue but here's a GIF of what I've been able to recreate:
(Please ignore the low quality of the GIF)
I'm not allowed to show the production code here but this is the single-method example that I used for the GIF:
public final class FlatLafTableIssue {
public static void main(final String... args) {
{
FlatLightLaf.setup();
UIManager.put("TitlePane.unifiedBackground", false);
}
boolean dark[] = new boolean[] { false };
final JFrame frame = new JFrame();
frame.setSize(680, 400);
frame.setTitle("FlatLafTableIssue");
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.setJMenuBar(new JMenuBar());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = (JPanel) frame.getContentPane();
panel.setLayout(new BorderLayout());
final JTable table = new JTable();
table.setModel(new DefaultTableModel(200, 5));
table.setIntercellSpacing(new Dimension(1, 1));
table.setShowHorizontalLines(true);
final JPanel tablePanel = new JPanel(new BorderLayout());
tablePanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 5, 20));
tablePanel.add(new JScrollPane(table));
final JButton button = new JButton();
button.setText("Toggle");
button.addActionListener((event) -> {
dark[0] = !dark[0];
FlatAnimatedLafChange.showSnapshot();
FlatLaf.setup(dark[0] ? new FlatDarkLaf() : new FlatLightLaf());
FlatLaf.updateUI();
FlatAnimatedLafChange.hideSnapshotWithAnimation();
});
final JPanel buttonPanel = new JPanel(new BorderLayout());
buttonPanel.setBorder(BorderFactory.createEmptyBorder(5, 20, 20, 20));
buttonPanel.add(button);
panel.add(tablePanel);
panel.add(buttonPanel, BorderLayout.SOUTH);
frame.setVisible(true);
}
}I used FlatLaf-3.2.1 and FlatLaf-Extras-3.2.1 as well, but the Issue is also replicable without the usage of the FlatAnimatedLafChange class that is provided by the FlatLaf-Extras module, I only used it for the smooth switching between themes. I also tried out the same example with the FlatTable component provided by FlatLaf-Extras but nothing changed. Everything has been compiled using Java 21.
Here's a ZIP archive that contains the .jar file used for the example (If you don't want to compile it yourself):
FlatLaf-3.2.1-Table-Issue.zip
You can run the .jar it with
java -jar FlatLaf-3.2.1-Table-Issue.jaror just by double clicking the file (If you have Java installed)