filecelleditor.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      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 edu.udo.cs.yale.operator.parameter.ParameterTypeFile;
import edu.udo.cs.yale.operator.parameter.ParameterTypeDirectory;

import javax.swing.table.TableCellEditor;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JTable;
import java.awt.FlowLayout;
import java.awt.Component;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;

/** Cell editor consiting of a text field and a small button for opening a file chooser. */
public abstract class FileCellEditor extends AbstractCellEditor implements PropertyCellEditor {

    private JPanel panel = new JPanel();
    private JTextField textField = new JTextField(12);
    private ParameterTypeFile type;
    private GridBagLayout gridBagLayout = new GridBagLayout();

    public FileCellEditor(ParameterTypeFile type) {
	this.type = type;
	panel.setLayout(gridBagLayout); 
	panel.setToolTipText(type.getDescription());
	textField.setToolTipText(type.getDescription());

	GridBagConstraints c = new GridBagConstraints();
	c.fill = c.BOTH;
	//c.gridwidth = c.RELATIVE;
	c.weightx = 1;
	gridBagLayout.setConstraints(textField, c);
	panel.add(textField);
    }

    protected JButton createFileChooserButton() {
	JButton button = new JButton(" ... ");
	button.setMargin(new Insets(0,0,0,0));
	button.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    buttonPressed();
		}
	    });
	button.setToolTipText("Select file (" + type.getDescription()+")");
	return button;
    }

    protected void addButton(JButton button, int gridwidth) {
	GridBagConstraints c = new GridBagConstraints();
	c.gridwidth = gridwidth;
	c.weightx   = 0;
	c.fill      = c.BOTH;
	gridBagLayout.setConstraints(button, c);
	panel.add(button);
    }

    private void buttonPressed() {
	File selectedFile = SwingTools.chooseFile(panel, 
						  (getCellEditorValue() == null) ?
						  null : 
						  new File((String)getCellEditorValue()),
						  true,
						  type instanceof ParameterTypeDirectory);
	if ((selectedFile != null)) {
	    setText(selectedFile);
	    fireEditingStopped();
	} else {
	    fireEditingCanceled();
	}
    }

    protected void setText(File file) {
	if (file == null) textField.setText("");
	else textField.setText(file.getPath());
    }

    public Object getCellEditorValue() {
	return (textField.getText().trim().length() == 0) ? null : textField.getText().trim();
    }

    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int col) {
	textField.setText((value == null) ? "" : value.toString());
	return panel;
    }

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
	return getTableCellEditorComponent(table, value, isSelected, row, column);
    }

    public boolean useEditorAsRenderer() {
	return true;
    }

    
}