src/jdk.jconsole/share/classes/sun/tools/jconsole/LabeledComponent.java

/*
 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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package sun.tools.jconsole;

import java.awt.*;

import javax.swing.*;

@SuppressWarnings("serial")
public class LabeledComponent extends JPanel {
    JPanel rightPanel;
    String labelStr, valueLabelStr, compoundStr;
    JLabel label;
    JComponent comp;

    public LabeledComponent(String text, JComponent comp) {
        this(text, 0, comp);
    }

    public LabeledComponent(String text, int mnemonic, JComponent comp) {
        super(new BorderLayout(6, 6));

        this.labelStr = text;
        this.label = new JLabel(text, JLabel.RIGHT);
        this.comp = comp;

        label.setLabelFor(comp);
        if (mnemonic > 0) {
            label.setDisplayedMnemonic(mnemonic);
        }

        add(label, BorderLayout.WEST);
        add(comp,  BorderLayout.CENTER);
    }

    public void setLabel(String str) {
        this.labelStr = str;
        updateLabel();
    }

    public void setValueLabel(String str) {
        this.valueLabelStr = str;
        updateLabel();
    }

    private void updateLabel() {
        String str = labelStr;
        label.setText(str);
        this.compoundStr = str;
        JComponent container = (JComponent)getParent();
        LabeledComponent.layout(container);
    }

    public static void layout(Container container) {
        int wMax = 0;

        for (Component c : container.getComponents()) {
            if (c instanceof LabeledComponent) {
                LabeledComponent lc = (LabeledComponent)c;
lc.label.setPreferredSize(null);
//              int w = lc.label.getMinimumSize().width;
int w = lc.label.getPreferredSize().width;
                if (w > wMax) {
                    wMax = w;
                }
            }
        }

        for (Component c : container.getComponents()) {
            if (c instanceof LabeledComponent) {
                LabeledComponent lc = (LabeledComponent)c;
                JLabel label = lc.label;
                int h = label.getPreferredSize().height;

                label.setPreferredSize(new Dimension(wMax, h));
                label.setHorizontalAlignment(JLabel.RIGHT);
            }
        }
    }
}