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Groups > comp.lang.java.gui > #5308

Re: JTabbedPane fails to clip tab text

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In article <fc8f8e86-58b9-44ca-962b-301da5c8710c@googlegroups.com>,
 FredK <fred.l.kleinschmidt@gmail.com> wrote:

> I have a JTabbedPane with multiple tabs, using WRAP_TAB_LAYOUT.
> When the user shrinks the window, the longest tab label draws its
> text outside the tab area instead of clipping it. It even runs
> over into the next tab. 
> 
> Also, when using Numbus LAF, it does not size properly.
> What am I missing to get this to work properly?

The converse of Knute's key insight is that pack() will cause the 
JTabbedPane to adopt the preferred size of the _largest_ tab 
component. In the variation below, each component panel has a 
random initial width. Change the L&F and/or resize the frame to see 
the effect. If you can test on Mac OS X, note that AquaLookAndFeel 
clips the long label at small sizes.

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;

public class TabTester extends JPanel {

    private static final Random r = new Random();

    public TabTester() {
        setLayout(new BorderLayout());

        JTabbedPane pane = new JTabbedPane(
            JTabbedPane.TOP, JTabbedPane.WRAP_TAB_LAYOUT);
        pane.addTab(
            "this is tab number 1, long label", createPane("p1"));
        pane.addTab("tab number 2", createPane("p2"));
        pane.addTab("this is tab 3", createPane("p3"));
        pane.addTab("tab 4", createPane("p4"));
        pane.addTab("another tab", createPane("p5"));
        add(pane, BorderLayout.CENTER);
    }

    private JPanel createPane(final String name) {
        final Dimension d = new Dimension(300 + r.nextInt(42), 200);
        final JPanel p = new JPanel(new GridLayout()) {
            @Override
            public Dimension getPreferredSize() {
                return d;
            }
        };
        final JLabel label = new JLabel(name, JLabel.CENTER);
        p.add(label);
        p.addComponentListener(new ComponentAdapter() {
            @Override
            public void componentResized(ComponentEvent e) {
                label.setText(name + ": width: " + p.getWidth());
            }
        });
        return p;
    }

    // http://stackoverflow.com/a/11949899/230513
    private static JToolBar createToolBar(final Component parent) {
        final UIManager.LookAndFeelInfo[] available =
            UIManager.getInstalledLookAndFeels();
        List<String> names = new ArrayList<String>();
        for (LookAndFeelInfo info : available) {
            names.add(info.getName());
        }
        final JComboBox combo = new JComboBox(names.toArray());
        String current = UIManager.getLookAndFeel().getName();
        combo.setSelectedItem(current);
        combo.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent ae) {
                int index = combo.getSelectedIndex();
                try {
                    UIManager.setLookAndFeel(
                        available[index].getClassName());
                    SwingUtilities.updateComponentTreeUI(parent);
                } catch (Exception e) {
                    e.printStackTrace(System.err);
                }
            }
        });
        JToolBar bar = new JToolBar("L&F");
        bar.setLayout(new FlowLayout(FlowLayout.LEFT));
        bar.add(combo);
        return bar;
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame("Tester");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                TabTester t = new TabTester();
                t.add(createToolBar(frame), BorderLayout.NORTH);
                frame.add(t);
                frame.pack();
                frame.setVisible(true);
            }
        });
    }
}

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

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Thread

JTabbedPane fails to clip tab text FredK <fred.l.kleinschmidt@gmail.com> - 2013-03-05 10:51 -0800
  Re: JTabbedPane fails to clip tab text Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2013-03-05 12:47 -0800
  Re: JTabbedPane fails to clip tab text "John B. Matthews" <nospam@nospam.invalid> - 2013-03-06 10:06 -0500
    Re: JTabbedPane fails to clip tab text FredK <fred.l.kleinschmidt@gmail.com> - 2013-03-06 08:01 -0800
      Re: JTabbedPane fails to clip tab text "John B. Matthews" <nospam@nospam.invalid> - 2013-03-08 04:04 -0500
        Re: JTabbedPane fails to clip tab text Knute Johnson <nospam@knutejohnson.com> - 2013-03-08 09:33 -0800

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