- Qt 5.5
- Qt SQL
- Cached Table Example
- tableeditor.cpp Example File
- Qt 5.5.1 Reference Documentation

# tableeditor.cpp Example File

cachedtable/tableeditor.cpp

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    ** This file is part of the examples of the Qt Toolkit.
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    #include <QtWidgets>
    #include <QtSql>

    #include "tableeditor.h"

    TableEditor::TableEditor(const QString &tableName, QWidget *parent)
        : QWidget(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);
        view->resizeColumnsToContents();

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

        buttonBox = new QDialogButtonBox(Qt::Vertical);
        buttonBox->addButton(submitButton, QDialogButtonBox::ActionRole);
        buttonBox->addButton(revertButton, QDialogButtonBox::ActionRole);
        buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

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

        QHBoxLayout *mainLayout = new QHBoxLayout;
        mainLayout->addWidget(view);
        mainLayout->addWidget(buttonBox);
        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()));
        }
    }