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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "browser.h"
+#include "qsqlconnectiondialog.h"
+
+#include <QtGui>
+#include <QtSql>
+
+Browser::Browser(QWidget *parent)
+ : 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."));
+}
+
+Browser::~Browser()
+{
+}
+
+void Browser::exec()
+{
+ 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();
+}
+
+QSqlError Browser::addConnection(const QString &driver, const QString &dbName, const QString &host,
+ const QString &user, const QString &passwd, int port)
+{
+ 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;
+}
+
+void Browser::addConnection()
+{
+ 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 occurred 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 occurred while "
+ "opening the connection: ") + err.text());
+ }
+}
+
+void Browser::showTable(const QString &t)
+{
+ QSqlTableModel *model = new QSqlTableModel(table, connectionWidget->currentDatabase());
+ model->setEditStrategy(QSqlTableModel::OnRowChange);
+ model->setTable(connectionWidget->currentDatabase().driver()->escapeIdentifier(t, QSqlDriver::TableName));
+ 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 &t)
+{
+ 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::insertRow()
+{
+ 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);
+}
+
+void Browser::deleteRow()
+{
+ 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();
+}
+
+void Browser::updateActions()
+{
+ bool enableIns = qobject_cast<QSqlTableModel *>(table->model());
+ bool enableDel = enableIns && table->currentIndex().isValid();
+
+ insertRowAction->setEnabled(enableIns);
+ deleteRowAction->setEnabled(enableDel);
+}
+
+void Browser::about()
+{
+ QMessageBox::about(this, tr("About"), tr("The SQL Browser demonstration "
+ "shows how a data browser can be used to visualize the results of SQL"
+ "statements on a live database"));
+}
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