welcomedialog.java

著名的开源仿真软件yale

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2002, 2003
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as 
 *  published by the Free Software Foundation; either version 2 of the
 *  License, or (at your option) any later version. 
 *
 *  This program 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 for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.gui;

import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JList;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.BorderFactory;
import javax.swing.border.BevelBorder;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.ListSelectionEvent;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

/** Lets the user select with what he wants to start: blank, existing file, recent file, or wizard. */
public class WelcomeDialog extends JDialog {

    private static final int NEW    = 0;
    private static final int RECENT = 1;
    private static final int OPEN   = 2;
    private static final int WIZARD = 3;

    private JRadioButton[] startOptions = {
	new JRadioButton("Start with a blank experiment"),
	new JRadioButton("Open one of the recently used experiments"),
	new JRadioButton("Open an existing experiment"),
	new JRadioButton("Start the Experiment Wizard")
    };

    private JList recentFileList;
    private ButtonGroup buttonGroup = new ButtonGroup();
    private MainFrame mainFrame;

    public WelcomeDialog(MainFrame mainFrame) {
	super(mainFrame, "Welcome to YALE!", true);
	this.mainFrame = mainFrame;
	Box box = new Box(BoxLayout.Y_AXIS);
	box.setBorder(BorderFactory.createEmptyBorder(11,11,11,11));
	for (int i = 0; i < startOptions.length; i++) {
	    box.add(startOptions[i]);
	    buttonGroup.add(startOptions[i]);
	    startOptions[i].setAlignmentX(0.0f);
	    if (i == RECENT) {
		if (YaleGUI.getRecentFiles().size() == 0) {
		    startOptions[RECENT].setEnabled(false);
		} else {
		    recentFileList = new JList(YaleGUI.getRecentFiles().toArray(new Object[YaleGUI.getRecentFiles().size()]));
		    recentFileList.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
		    recentFileList.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
		    recentFileList.addListSelectionListener(new ListSelectionListener() {
			    public void valueChanged(ListSelectionEvent e) {
				startOptions[RECENT].setSelected(true);
			    }
			});
		    JPanel listPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
		    listPanel.add(recentFileList);
		    listPanel.setBorder(BorderFactory.createEmptyBorder(0,30,0,0));
		    listPanel.setAlignmentX(0.0f);
		    box.add(listPanel);		
		    startOptions[RECENT].addActionListener(new ActionListener() {
			    public void actionPerformed(ActionEvent e) {
				if (recentFileList.getSelectedIndex() == -1)
				recentFileList.setSelectedIndex(0);
			    }
			});
		}
	    }
	}
	startOptions[NEW].setSelected(true);
	getContentPane().add(box, BorderLayout.CENTER);
	JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
	JButton start = new JButton("Start");
	start.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    start();
		}
	    });
	buttonPanel.add(start);
	getContentPane().add(buttonPanel, BorderLayout.SOUTH); 
	setResizable(false);
	pack();
	setLocationRelativeTo(mainFrame);
    }

    private void start() {
	dispose();

	int selected = 0;
	while (!startOptions[selected].isSelected())
	    selected++;

	switch (selected) {
	case NEW:
	    break;
	case OPEN:
	    mainFrame.open();
	    break;
	case RECENT:
	    mainFrame.open((File)YaleGUI.getRecentFiles().get(recentFileList.getSelectedIndex()));
	    break;
	case WIZARD:
	    new WizardDialog(mainFrame).show();
	    break;
	}
    }

}