Long live Qt 4.5!

1 files changed, 247 insertions, 0 deletions

diff --git a/demos/sqlbrowser/browser.cpp b/demos/sqlbrowser/browser.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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(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 &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 "
+        "show how a data browser can be used to visualize the results of SQL"
+        "statements on a live database"));
+}