Browser Class Reference

#include <browser.h>

Inheritance diagram for Browser:

[legend]Collaboration diagram for Browser:

[legend]List of all members.

---

Detailed Description

Definition at line 36 of file browser.h.

Public Slots
void	exec ()
void	showTable (const QString &table)
void	showMetaData (const QString &table)
void	addConnection ()
void	currentChanged ()
void	on_insertRowAction_triggered ()
void	on_deleteRowAction_triggered ()
void	on_connectionWidget_tableActivated (const QString &table)
void	on_connectionWidget_metaDataRequested (const QString &table)
void	on_submitButton_clicked ()
void	on_clearButton_clicked ()
Signals
void	statusMessage (const QString &message)
Public Member Functions
	Browser (QWidget *parent=0)
virtual	~Browser ()
QSqlError	addConnection (const QString &driver, const QString &dbName, const QString &host, const QString &user, const QString &passwd, int port=-1)
void	insertRow ()
void	deleteRow ()
void	updateActions ()

---

Constructor & Destructor Documentation

Browser::Browser

(

QWidget *

parent = 0

)

Definition at line 30 of file browser.cpp.

References QSqlDatabase::drivers(), emit, QMessageBox::information(), isEmpty(), and statusMessage().

    : QWidget(parent)
{
    setupUi(this);

    table->addAction(insertRowAction);
    table->addAction(deleteRowAction);

    if (QSqlDatabase::drivers().isEmpty())
        QMessageBox::information(this, tr("No database drivers found"),
                                 tr("This demo requires at least one Qt database driver. "
                                    "Please check the documentation how to build the "
                                    "Qt SQL plugins."));

    emit statusMessage(tr("Ready."));
}

Here is the call graph for this function:

Browser::~Browser

(

)

[virtual]

Definition at line 47 of file browser.cpp.

{
}

---

Member Function Documentation

QSqlError Browser::addConnection	(	const QString &	driver,
		const QString &	dbName,
		const QString &	host,
		const QString &	user,
		const QString &	passwd,
		int	port = -1
	)

Definition at line 68 of file browser.cpp.

References QSqlDatabase::addDatabase(), QSqlDatabase::lastError(), QSqlDatabase::open(), QSqlDatabase::removeDatabase(), QSqlDatabase::setDatabaseName(), QSqlDatabase::setHostName(), and QSqlDatabase::setPort().

Referenced by addConnectionsFromCommandline().

{
    static int cCount = 0;

    QSqlError err;
    QSqlDatabase db = QSqlDatabase::addDatabase(driver, QString("Browser%1").arg(++cCount));
    db.setDatabaseName(dbName);
    db.setHostName(host);
    db.setPort(port);
    if (!db.open(user, passwd)) {
        err = db.lastError();
        db = QSqlDatabase();
        QSqlDatabase::removeDatabase(QString("Browser%1").arg(cCount));
    }
    connectionWidget->refresh();

    return err;
}

Here is the call graph for this function:

void Browser::insertRow

(

)

Definition at line 180 of file browser.cpp.

References QAbstractTableModel::index(), QAbstractItemModel::insertRow(), QModelIndex::row(), and row.

Referenced by on_insertRowAction_triggered().

{
    QSqlTableModel *model = qobject_cast<QSqlTableModel *>(table->model());
    if (!model)
        return;

    QModelIndex insertIndex = table->currentIndex();
    int row = insertIndex.row() == -1 ? 0 : insertIndex.row();
    model->insertRow(row);
    insertIndex = model->index(row, 0);
    table->setCurrentIndex(insertIndex);
    table->edit(insertIndex);
}

Here is the call graph for this function:

void Browser::deleteRow

(

)

Definition at line 194 of file browser.cpp.

References QList< T >::at(), QList< T >::count(), i, QSqlTableModel::OnManualSubmit, QSqlTableModel::OnRowChange, QAbstractItemModel::removeRow(), QSqlTableModel::setEditStrategy(), QSqlTableModel::submitAll(), and updateActions().

Referenced by on_deleteRowAction_triggered().

{
    QSqlTableModel *model = qobject_cast<QSqlTableModel *>(table->model());
    if (!model)
        return;

    model->setEditStrategy(QSqlTableModel::OnManualSubmit);

    QModelIndexList currentSelection = table->selectionModel()->selectedIndexes();
    for (int i = 0; i < currentSelection.count(); ++i) {
        if (currentSelection.at(i).column() != 0)
            continue;
        model->removeRow(currentSelection.at(i).row());
    }

    model->submitAll();
    model->setEditStrategy(QSqlTableModel::OnRowChange);

    updateActions();
}

Here is the call graph for this function:

void Browser::updateActions

(

)

Definition at line 215 of file browser.cpp.

Referenced by currentChanged(), deleteRow(), exec(), showMetaData(), and showTable().

{
    bool enableIns = qobject_cast<QSqlTableModel *>(table->model());
    bool enableDel = enableIns && table->currentIndex().isValid();

    insertRowAction->setEnabled(enableIns);
    deleteRowAction->setEnabled(enableDel);
}

void Browser::exec

(

)

[slot]

Definition at line 51 of file browser.cpp.

References emit, QSqlQuery::isSelect(), QSqlQueryModel::lastError(), QSqlError::NoError, QSqlQuery::numRowsAffected(), QSqlQueryModel::query(), QSqlQueryModel::setQuery(), statusMessage(), QSqlError::text(), QSqlError::type(), and updateActions().

Referenced by on_submitButton_clicked().

{
    QSqlQueryModel *model = new QSqlQueryModel(table);
    model->setQuery(QSqlQuery(sqlEdit->toPlainText(), connectionWidget->currentDatabase()));
    table->setModel(model);

    if (model->lastError().type() != QSqlError::NoError)
        emit statusMessage(model->lastError().text());
    else if (model->query().isSelect())
        emit statusMessage(tr("Query OK."));
    else
        emit statusMessage(tr("Query OK, number of affected rows: %1").arg(
                           model->query().numRowsAffected()));

    updateActions();
}

void Browser::showTable

(

const QString &

table

)

[slot]

Definition at line 127 of file browser.cpp.

References QObject::connect(), currentChanged(), QAbstractItemView::DoubleClicked, QAbstractItemView::EditKeyPressed, emit, QSqlQueryModel::lastError(), QSqlError::NoError, QSqlTableModel::OnRowChange, QSqlTableModel::select(), QSqlTableModel::setEditStrategy(), QSqlTableModel::setTable(), SIGNAL, SLOT, statusMessage(), t, QSqlError::text(), QSqlError::type(), and updateActions().

Referenced by on_connectionWidget_tableActivated().

{
    QSqlTableModel *model = new QSqlTableModel(table, connectionWidget->currentDatabase());
    model->setEditStrategy(QSqlTableModel::OnRowChange);
    model->setTable(t);
    model->select();
    if (model->lastError().type() != QSqlError::NoError)
        emit statusMessage(model->lastError().text());
    table->setModel(model);
    table->setEditTriggers(QAbstractItemView::DoubleClicked|QAbstractItemView::EditKeyPressed);

    connect(table->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
            this, SLOT(currentChanged()));
    updateActions();
}

void Browser::showMetaData

(

const QString &

table

)

[slot]

Definition at line 143 of file browser.cpp.

References QSqlRecord::count(), QSqlRecord::field(), Qt::Horizontal, i, QStandardItemModel::index(), QStandardItemModel::insertColumns(), QStandardItemModel::insertRows(), QAbstractItemView::NoEditTriggers, QStandardItemModel::setData(), QStandardItemModel::setHeaderData(), t, QVariant::typeToName(), and updateActions().

Referenced by on_connectionWidget_metaDataRequested().

{
    QSqlRecord rec = connectionWidget->currentDatabase().record(t);
    QStandardItemModel *model = new QStandardItemModel(table);

    model->insertRows(0, rec.count());
    model->insertColumns(0, 7);

    model->setHeaderData(0, Qt::Horizontal, "Fieldname");
    model->setHeaderData(1, Qt::Horizontal, "Type");
    model->setHeaderData(2, Qt::Horizontal, "Length");
    model->setHeaderData(3, Qt::Horizontal, "Precision");
    model->setHeaderData(4, Qt::Horizontal, "Required");
    model->setHeaderData(5, Qt::Horizontal, "AutoValue");
    model->setHeaderData(6, Qt::Horizontal, "DefaultValue");


    for (int i = 0; i < rec.count(); ++i) {
        QSqlField fld = rec.field(i);
        model->setData(model->index(i, 0), fld.name());
        model->setData(model->index(i, 1), fld.typeID() == -1
                ? QString(QVariant::typeToName(fld.type()))
                : QString("%1 (%2)").arg(QVariant::typeToName(fld.type())).arg(fld.typeID()));
        model->setData(model->index(i, 2), fld.length());
        model->setData(model->index(i, 3), fld.precision());
        model->setData(model->index(i, 4), fld.requiredStatus() == -1 ? QVariant("?")
                : QVariant(bool(fld.requiredStatus())));
        model->setData(model->index(i, 5), fld.isAutoValue());
        model->setData(model->index(i, 6), fld.defaultValue());
    }

    table->setModel(model);
    table->setEditTriggers(QAbstractItemView::NoEditTriggers);

    updateActions();
}

void Browser::addConnection

(

)

[slot]

Definition at line 88 of file browser.cpp.

References QDialog::Accepted, QSqlDatabase::addDatabase(), QSqlDatabase::close(), QSqlDatabase::database(), QSqlConnectionDialog::databaseName(), QSqlConnectionDialog::driverName(), QSqlQuery::exec(), QDialog::exec(), QSqlConnectionDialog::hostName(), QSqlDatabase::lastError(), QSqlError::NoError, QSqlDatabase::open(), QSqlConnectionDialog::password(), QSqlConnectionDialog::port(), QSqlDatabase::removeDatabase(), QSqlDatabase::setDatabaseName(), QSqlError::text(), QSqlError::type(), QSqlConnectionDialog::useInMemoryDatabase(), QSqlConnectionDialog::userName(), and QMessageBox::warning().

{
    QSqlConnectionDialog dialog(this);
    if (dialog.exec() != QDialog::Accepted)
        return;

    if (dialog.useInMemoryDatabase()) {
        QSqlDatabase::database("in_mem_db", false).close();
        QSqlDatabase::removeDatabase("in_mem_db");
        QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "in_mem_db");
        db.setDatabaseName(":memory:");
        if (!db.open())
            QMessageBox::warning(this, tr("Unable to open database"), tr("An error occured while "
                                                                         "opening the connection: ") + db.lastError().text());
        QSqlQuery q("", db);
        q.exec("drop table Movies");
        q.exec("drop table Names");
        q.exec("create table Movies (id integer primary key, Title varchar, Director varchar, Rating number)");
        q.exec("insert into Movies values (0, 'Metropolis', 'Fritz Lang', '8.4')");
        q.exec("insert into Movies values (1, 'Nosferatu, eine Symphonie des Grauens', 'F.W. Murnau', '8.1')");
        q.exec("insert into Movies values (2, 'Bis ans Ende der Welt', 'Wim Wenders', '6.5')");
        q.exec("insert into Movies values (3, 'Hardware', 'Richard Stanley', '5.2')");
        q.exec("insert into Movies values (4, 'Mitchell', 'Andrew V. McLaglen', '2.1')");
        q.exec("create table Names (id integer primary key, Firstname varchar, Lastname varchar, City varchar)");
        q.exec("insert into Names values (0, 'Sala', 'Palmer', 'Morristown')");
        q.exec("insert into Names values (1, 'Christopher', 'Walker', 'Morristown')");
        q.exec("insert into Names values (2, 'Donald', 'Duck', 'Andeby')");
        q.exec("insert into Names values (3, 'Buck', 'Rogers', 'Paris')");
        q.exec("insert into Names values (4, 'Sherlock', 'Holmes', 'London')");
        connectionWidget->refresh();
    } else {
        QSqlError err = addConnection(dialog.driverName(), dialog.databaseName(), dialog.hostName(),
                           dialog.userName(), dialog.password(), dialog.port());
        if (err.type() != QSqlError::NoError)
            QMessageBox::warning(this, tr("Unable to open database"), tr("An error occured while "
                                       "opening the connection: ") + err.text());
    }
}

void Browser::currentChanged

(

)

[inline, slot]

Definition at line 55 of file browser.h.

References updateActions().

Referenced by showTable().

{ updateActions(); }

void Browser::on_insertRowAction_triggered

(

)

[inline, slot]

Definition at line 57 of file browser.h.

References insertRow().

    { insertRow(); }

void Browser::on_deleteRowAction_triggered

(

)

[inline, slot]

Definition at line 59 of file browser.h.

References deleteRow().

    { deleteRow(); }

void Browser::on_connectionWidget_tableActivated

(

const QString &

table

)

[inline, slot]

Definition at line 61 of file browser.h.

References showTable().

    { showTable(table); }

void Browser::on_connectionWidget_metaDataRequested

(

const QString &

table

)

[inline, slot]

Definition at line 63 of file browser.h.

References showMetaData().

    { showMetaData(table); }

void Browser::on_submitButton_clicked

(

)

[inline, slot]

Definition at line 65 of file browser.h.

References exec().

    {
        exec();
        sqlEdit->setFocus();
    }

void Browser::on_clearButton_clicked

(

)

[inline, slot]

Definition at line 70 of file browser.h.

    {
        sqlEdit->clear();
        sqlEdit->setFocus();
    }

void Browser::statusMessage

(

const QString &

message

)

[signal]

Referenced by Browser(), exec(), and showTable().

---

The documentation for this class was generated from the following files:

• demos/sqlbrowser/browser.h
• demos/sqlbrowser/browser.cpp

---