|  | Home · Examples

# Code for Cached Table Example

    /****************************************************************************
    **
    ** Copyright (C) 1992-2008 Nokia. All rights reserved.
    **
    ** This file is part of Qt Jambi.
    **
    ** * Commercial Usage
    * Licensees holding valid Qt Commercial licenses may use this file in
    * accordance with the Qt Commercial License Agreement provided with the
    * Software or, alternatively, in accordance with the terms contained in
    * a written agreement between you and Nokia.
    *
    *
    * GNU General Public License Usage
    * Alternatively, this file may be used under the terms of the GNU
    * General Public License versions 2.0 or 3.0 as published by the Free
    * Software Foundation and appearing in the file LICENSE.GPL included in
    * the packaging of this file.  Please review the following information
    * to ensure GNU General Public Licensing requirements will be met:
    * http://www.fsf.org/licensing/licenses/info/GPLv2.html and
    * http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
    * exception, Nokia gives you certain additional rights. These rights
    * are described in the Nokia Qt GPL Exception version 1.2, included in
    * the file GPL_EXCEPTION.txt in this package.
    *
    * Qt for Windows(R) Licensees
    * As a special exception, Nokia, as the sole copyright holder for Qt
    * Designer, grants users of the Qt/Eclipse Integration plug-in the
    * right for the Qt/Eclipse Integration to link to functionality
    * provided by Qt Designer and its related libraries.
    *
    *
    * If you are unsure which license is appropriate for your use, please
    * contact the sales department at qt-sales@nokia.com.

    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    package com.trolltech.examples;

    import com.trolltech.qt.core.Qt;
    import com.trolltech.qt.gui.*;
    import com.trolltech.qt.sql.QSqlDatabase;
    import com.trolltech.qt.sql.QSqlTableModel;

    @QtJambiExample(name = "Cached Table",
                    canInstantiate = "call-static-method:checkSqlLite")
    public class CachedTable extends QDialog {
        private QPushButton submitButton = null;
        private QPushButton revertButton = null;
        private QPushButton quitButton = null;
        private QSqlTableModel model = null;

        public static void main(String[] args) {
            QApplication.initialize(args);

            if (!checkSqlLite()) {
                System.out.println("Missing support for SQL");
                return;
            }

            CachedTable table = new CachedTable(null);
            table.show();
            table.exec();
        }

        public CachedTable(QWidget parent)
        {
            super(parent);

            if (!SqlCommon.createConnection())
                throw new RuntimeException("Couldn't connect to SQLITE server");

            String tableName = "person";

            model = new QSqlTableModel(this);
            model.setTable(tableName);
            model.setEditStrategy(QSqlTableModel.EditStrategy.OnManualSubmit);
            model.select();

            model.setHeaderData(0, Qt.Orientation.Horizontal, tr("ID"));
            model.setHeaderData(1, Qt.Orientation.Horizontal, tr("First name"));
            model.setHeaderData(2, Qt.Orientation.Horizontal, tr("Last name"));

            QTableView view = new QTableView();
            view.setModel(model);

            setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));

            submitButton = new QPushButton(tr("Submit"));
            submitButton.setDefault(true);
            revertButton = new QPushButton(tr("&Revert"));
            quitButton = new QPushButton(tr("Quit"));

            submitButton.clicked.connect(this, "submit()");
            revertButton.clicked.connect(model, "revertAll()");
            quitButton.clicked.connect(this, "close()");

            QVBoxLayout buttonLayout = new QVBoxLayout();
            buttonLayout.addWidget(submitButton);
            buttonLayout.addWidget(revertButton);
            buttonLayout.addWidget(quitButton);
            buttonLayout.addStretch(1);

            QHBoxLayout mainLayout = new QHBoxLayout();
            mainLayout.addWidget(view);
            mainLayout.addLayout(buttonLayout);
            setLayout(mainLayout);

            setWindowTitle(tr("Cached Table"));
        }

        protected void submit()
        {
            model.database().transaction();
            if (model.submitAll()) {
                model.database().commit();
            } else {
                model.database().rollback();
                QMessageBox.warning(this, tr("Cached Table"),
                                    tr("The database reported an error: ") + model.lastError().text());
            }
        }

        public static boolean checkSqlLite() {
            return QSqlDatabase.isDriverAvailable("QSQLITE");
        }
    }