Java example source code file (OverviewPanel.java)

This example Java source code file (OverviewPanel.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, borderlayout, color, dimension, gui, is_gtk, jlabel, jpanel, override, overviewpanel, plotter, plotter_color, plotterpanel, preferred_plotter_size, stringbuilder, swing, view_range

The OverviewPanel.java Java example source code

/*
 * Copyright (c) 2006, 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
 * questions.
 */

package sun.tools.jconsole;

import java.awt.*;

import javax.swing.*;


import static javax.swing.SwingConstants.*;
import static sun.tools.jconsole.JConsole.*;
import static sun.tools.jconsole.Utilities.*;


@SuppressWarnings("serial")
abstract class OverviewPanel extends PlotterPanel {
    private static final Dimension PREFERRED_PLOTTER_SIZE = new Dimension(300, 200);
    private static final Dimension MINIMUM_PLOTTER_SIZE = new Dimension(200, 150);

    // This is the default view range for all the overview plotters
    static final int VIEW_RANGE = -1;   // Show all data

    static Color PLOTTER_COLOR = IS_GTK ? new Color(231, 111, 80) : null;

    private JLabel infoLabel;

    public OverviewPanel(String title) {
        this(title, null, null, null);
    }

    public OverviewPanel(String title, String plotterKey,
                         String plotterName, Plotter.Unit plotterUnit) {
        super(title);
        setLayout(new BorderLayout(0, 0));

        if (plotterKey != null && plotterName != null) {
            Plotter plotter = new Plotter();
            plotter.setPreferredSize(PREFERRED_PLOTTER_SIZE);
            plotter.setMinimumSize(MINIMUM_PLOTTER_SIZE);
            plotter.setViewRange(VIEW_RANGE);
            if (plotterUnit != null) {
                plotter.setUnit(plotterUnit);
            }
            plotter.createSequence(plotterKey, plotterName, PLOTTER_COLOR, true);
            setAccessibleName(plotter,
                              Resources.format(Messages.OVERVIEW_PANEL_PLOTTER_ACCESSIBLE_NAME,
                                      title));
            setPlotter(plotter);
        }
    }


    public JLabel getInfoLabel() {
        if (infoLabel == null) {
            infoLabel = new JLabel("", CENTER) {
                @Override
                public void setText(String text) {
                    if (text.startsWith("<html>")) {
                        // Replace spaces with nbsp, except the
                        // last one of two or more (to allow wrapping)
                        StringBuilder buf = new StringBuilder();
                        char[] chars = text.toCharArray();
                        int n = chars.length;
                        for (int i = 0; i < n; i++) {
                            if (chars[i] == ' '
                                && ((i < n-1 && chars[i+1] == ' ')
                                    || ((i == 0 || chars[i-1] != ' ')
                                        && (i == n-1 || chars[i+1] != ' ')))) {
                                buf.append(" ");
                            } else {
                                buf.append(chars[i]);
                            }
                        }
                        text = buf.toString();
                    }
                    super.setText(text);
                }
            };

            if (IS_GTK) {
                JPanel southPanel = new JPanel(new BorderLayout());
                JSeparator separator = new JSeparator(JSeparator.HORIZONTAL);
                southPanel.add(separator, BorderLayout.NORTH);
                southPanel.add(infoLabel, BorderLayout.SOUTH);
                add(southPanel, BorderLayout.SOUTH);
            } else {
                add(infoLabel, BorderLayout.SOUTH);
            }
        }
        return infoLabel;
    }
}

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Java example source code file (OverviewPanel.java)

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The OverviewPanel.java Java example source code

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