com.anrisoftware.prefdialog.miscswing.spreadsheet.table.EditOnSelection Maven / Gradle / Ivy

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Miscellaneous swing components.
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/*
 * Copyright 2013-2016 Erwin Müller 
 *
 * This file is part of prefdialog-misc-swing.
 *
 * prefdialog-misc-swing 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.
 *
 * prefdialog-misc-swing 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 Lesser General Public License
 * along with prefdialog-misc-swing. If not, see .
 */
package com.anrisoftware.prefdialog.miscswing.spreadsheet.table;

import static javax.swing.SwingUtilities.invokeLater;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

/**
 * Starts cell editing on selection.
 *
 * @author Erwin Mueller, [email protected]
 * @since 3.0
 */
final class EditOnSelection {

	private final ListSelectionListener selectionListener;

	private JTable table;

	private ListSelectionModel model;

	private ListSelectionModel columnSelectionModel;

	private ListSelectionModel selectionModel;

	private JTextField field;

	private int row1;

	private int row0;

	private int column0;

	private int column1;

	EditOnSelection() {
		this.selectionListener = new ListSelectionListener() {

			@Override
			public void valueChanged(ListSelectionEvent e) {
				if (e.getValueIsAdjusting()) {
					return;
				}
				editCell();
			}
		};
	}

	    /**
     * Sets the table.
     *
     * @param table
     *            the {@link JTable}.
     */
	public void setTable(JTable table) {
		if (columnSelectionModel != null) {
			columnSelectionModel.removeListSelectionListener(selectionListener);
		}
		if (selectionModel != null) {
			selectionModel.removeListSelectionListener(selectionListener);
		}
		this.table = table;
		this.model = table.getSelectionModel();
		this.columnSelectionModel = table.getColumnModel().getSelectionModel();
		this.selectionModel = table.getSelectionModel();
		columnSelectionModel.addListSelectionListener(selectionListener);
		selectionModel.addListSelectionListener(selectionListener);
	}

	private void editCell() {
		row0 = model.getAnchorSelectionIndex();
		row1 = model.getLeadSelectionIndex();
		column0 = columnSelectionModel.getAnchorSelectionIndex();
		column1 = columnSelectionModel.getLeadSelectionIndex();
		if (row0 != row1) {
			return;
		}
		if (column0 != column1) {
			return;
		}
		invokeLater(new Runnable() {

			@Override
			public void run() {
				editCellInAWT();
			}

		});
	}

	private void editCellInAWT() {
		if (table.editCellAt(row1, column1)) {
			Component editor = table.getEditorComponent();
			editor.requestFocusInWindow();
			if (editor instanceof JTextField && field == null) {
				addMoveCellAction((JTextField) editor);
			}
		}
	}

	private void addMoveCellAction(JTextField field) {
		this.field = field;
		field.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				moveCell();
			}
		});
	}

	private void moveCell() {
		invokeLater(new Runnable() {

			@Override
			public void run() {
				moveCellInAWT();
			}

		});
	}

	private void moveCellInAWT() {
		row1 = row1 + 1;
		model.setSelectionInterval(row1, row1);
		columnSelectionModel.setSelectionInterval(column1, column1);
		table.scrollRectToVisible(table.getCellRect(row1, 0, true));
	}
}