/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.properties.celleditors.value;

import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;

import com.rapidminer.gui.properties.RegexpPropertyDialog;
import com.rapidminer.gui.tools.ResourceAction;
import com.rapidminer.operator.Operator;
import com.rapidminer.parameter.ParameterTypeRegexp;


/**
 * A cell editor for regular expression parameters. Supports the direct
 * specification of regular expressions. Also provides a button which
 * starts a dialog to edit regular expressions.
 * 
 * @author Tobias Malbrecht
 */
public class RegexpValueCellEditor extends AbstractCellEditor implements PropertyValueCellEditor {

	private static final long serialVersionUID = -2387465714767785072L;

	private final JPanel panel = new JPanel();

	private final JTextField textField = new JTextField(12);

	private Operator operator;

	public RegexpValueCellEditor(final ParameterTypeRegexp type) {
		panel.setLayout(new GridBagLayout());
		panel.setToolTipText(type.getDescription());
		textField.setToolTipText(type.getDescription());
		textField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				fireEditingStopped();
			}			
		});
		textField.addFocusListener(new FocusListener() {
			@Override
			public void focusLost(FocusEvent e) {
				fireEditingStopped();
			}			
			@Override public void focusGained(FocusEvent e) { }
		});

		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.BOTH;
		c.weighty = 1;
		c.weightx = 1;
		panel.add(textField, c);

		final JButton button = new JButton(new ResourceAction(true, "regexp") {
			private static final long serialVersionUID = 3989811306286704326L;

			public void actionPerformed(ActionEvent e) {
				RegexpPropertyDialog dialog = new RegexpPropertyDialog(type, textField.getText(), operator);
				dialog.setVisible(true);
				if (dialog.isOk()) {
					textField.setText(dialog.getRegexp());
					fireEditingStopped();
				} else {
					fireEditingCanceled();
				}
			}
		});
		button.setMargin(new Insets(0, 0, 0, 0));
		c.weightx = 0;
		panel.add(button, c);
	}

	@Override
	public Object getCellEditorValue() {
		return textField.getText();
	}

	@Override
	public boolean rendersLabel() {
		return false;
	}

	@Override
	public void setOperator(Operator operator) {
		this.operator = operator;
	}

	@Override
	public boolean useEditorAsRenderer() {
		return true;
	}

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

	@Override
	public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
		textField.setText((value == null) ? "" : value.toString());
		return panel;
	}
}