Qt 4.0: tableeditor.cpp Example File (sql/cachedtable/tableeditor.cpp)

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# tableeditor.cpp Example File
sql/cachedtable/tableeditor.cpp

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        ** This file is part of the documentation of the Qt Toolkit.
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        #include <QtGui>
        #include <QtSql>

        #include "tableeditor.h"

        TableEditor::TableEditor(const QString &tableName, QWidget *parent)
            : QDialog(parent)
        {
            model = new QSqlTableModel(this);
            model->setTable(tableName);
            model->setEditStrategy(QSqlTableModel::OnManualSubmit);
            model->select();

            model->setHeaderData(0, Qt::Horizontal, tr("ID"));
            model->setHeaderData(1, Qt::Horizontal, tr("First name"));
            model->setHeaderData(2, Qt::Horizontal, tr("Last name"));

            QTableView *view = new QTableView;
            view->setModel(model);

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

            connect(submitButton, SIGNAL(clicked()), this, SLOT(submit()));
            connect(revertButton, SIGNAL(clicked()), model, SLOT(revertAll()));
            connect(quitButton, SIGNAL(clicked()), this, SLOT(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"));
        }

        void TableEditor::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: %1")
                                     .arg(model->lastError().text()));
            }
        }