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jtstand-common is a library derived from jcommon, used by jtstand-chart, which is derived from jfreechart
There is a newer version: 1.5.9
/*
 * Copyright (c) 2009 Albert Kurucz. 
 *
 * This file, StandardDialog.java is part of JTStand.
 *
 * JTStand is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JTStand 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GTStand.  If not, see .
 */

package org.jfree.ui;

import java.awt.Dialog;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ResourceBundle;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;

import org.jfree.util.ResourceBundleWrapper;

/**
 * The base class for standard dialogs.
 *
 * @author David Gilbert
 */
public class StandardDialog extends JDialog implements ActionListener {

    /** Flag that indicates whether or not the dialog was cancelled. */
    private boolean cancelled;

    /** The resourceBundle for the localization. */
    protected static final ResourceBundle localizationResources
            = ResourceBundleWrapper.getBundle(
                    "org.jfree.ui.LocalizationBundle");

    /**
     * Standard constructor - builds a dialog...
     *
     * @param owner  the owner.
     * @param title  the title.
     * @param modal  modal?
     */
    public StandardDialog(final Frame owner, final String title,
            final boolean modal) {
        super(owner, title, modal);
        this.cancelled = false;
    }

    /**
     * Standard constructor - builds a dialog...
     *
     * @param owner  the owner.
     * @param title  the title.
     * @param modal  modal?
     */
    public StandardDialog(final Dialog owner, final String title,
            final boolean modal) {
        super(owner, title, modal);
        this.cancelled = false;
    }

    /**
     * Returns a flag that indicates whether or not the dialog has been
     * cancelled.
     *
     * @return boolean.
     */
    public boolean isCancelled() {
        return this.cancelled;
    }

    /**
     * Handles clicks on the standard buttons.
     *
     * @param event  the event.
     */
    public void actionPerformed(final ActionEvent event) {
        final String command = event.getActionCommand();
        if (command.equals("helpButton")) {
            // display help information
        }
        else if (command.equals("okButton")) {
            this.cancelled = false;
            setVisible(false);
        }
        else if (command.equals("cancelButton")) {
            this.cancelled = true;
            setVisible(false);
        }
    }

    /**
     * Builds and returns the user interface for the dialog.  This method is
     * shared among the constructors.
     *
     * @return the button panel.
     */
    protected JPanel createButtonPanel() {

        final L1R2ButtonPanel buttons = new L1R2ButtonPanel(
                localizationResources.getString("Help"),
                localizationResources.getString("OK"),
                localizationResources.getString("Cancel"));

        final JButton helpButton = buttons.getLeftButton();
        helpButton.setActionCommand("helpButton");
        helpButton.addActionListener(this);

        final JButton okButton = buttons.getRightButton1();
        okButton.setActionCommand("okButton");
        okButton.addActionListener(this);

        final JButton cancelButton = buttons.getRightButton2();
        cancelButton.setActionCommand("cancelButton");
        cancelButton.addActionListener(this);

        buttons.setBorder(BorderFactory.createEmptyBorder(4, 0, 0, 0));
        return buttons;
    }

}