--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/xmlpatterns/schema/mainwindow.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,218 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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 <QtGui>
+#include <QtXmlPatterns>
+
+#include "mainwindow.h"
+#include "xmlsyntaxhighlighter.h"
+
+//! [4]
+class MessageHandler : public QAbstractMessageHandler
+{
+    public:
+        MessageHandler()
+            : QAbstractMessageHandler(0)
+        {
+        }
+
+        QString statusMessage() const
+        {
+            return m_description;
+        }
+
+        int line() const
+        {
+            return m_sourceLocation.line();
+        }
+
+        int column() const
+        {
+            return m_sourceLocation.column();
+        }
+
+    protected:
+        virtual void handleMessage(QtMsgType type, const QString &description,
+                                   const QUrl &identifier, const QSourceLocation &sourceLocation)
+        {
+            Q_UNUSED(type);
+            Q_UNUSED(identifier);
+
+            m_messageType = type;
+            m_description = description;
+            m_sourceLocation = sourceLocation;
+        }
+
+    private:
+        QtMsgType m_messageType;
+        QString m_description;
+        QSourceLocation m_sourceLocation;
+};
+//! [4]
+
+//! [0]
+MainWindow::MainWindow()
+{
+    setupUi(this);
+
+    new XmlSyntaxHighlighter(schemaView->document());
+    new XmlSyntaxHighlighter(instanceEdit->document());
+
+    schemaSelection->addItem(tr("Contact Schema"));
+    schemaSelection->addItem(tr("Recipe Schema"));
+    schemaSelection->addItem(tr("Order Schema"));
+
+    instanceSelection->addItem(tr("Valid Contact Instance"));
+    instanceSelection->addItem(tr("Invalid Contact Instance"));
+
+    connect(schemaSelection, SIGNAL(currentIndexChanged(int)), SLOT(schemaSelected(int)));
+    connect(instanceSelection, SIGNAL(currentIndexChanged(int)), SLOT(instanceSelected(int)));
+    connect(validateButton, SIGNAL(clicked()), SLOT(validate()));
+    connect(instanceEdit, SIGNAL(textChanged()), SLOT(textChanged()));
+
+    validationStatus->setAlignment(Qt::AlignCenter | Qt::AlignVCenter);
+
+    schemaSelected(0);
+    instanceSelected(0);
+}
+//! [0]
+
+//! [1]
+void MainWindow::schemaSelected(int index)
+{
+    instanceSelection->clear();
+    if (index == 0) {
+        instanceSelection->addItem(tr("Valid Contact Instance"));
+        instanceSelection->addItem(tr("Invalid Contact Instance"));
+    } else if (index == 1) {
+        instanceSelection->addItem(tr("Valid Recipe Instance"));
+        instanceSelection->addItem(tr("Invalid Recipe Instance"));
+    } else if (index == 2) {
+        instanceSelection->addItem(tr("Valid Order Instance"));
+        instanceSelection->addItem(tr("Invalid Order Instance"));
+    }
+    textChanged();
+
+    QFile schemaFile(QString(":/schema_%1.xsd").arg(index));
+    schemaFile.open(QIODevice::ReadOnly);
+    const QString schemaText(QString::fromUtf8(schemaFile.readAll()));
+    schemaView->setPlainText(schemaText);
+
+    validate();
+}
+//! [1]
+
+//! [2]
+void MainWindow::instanceSelected(int index)
+{
+    QFile instanceFile(QString(":/instance_%1.xml").arg((2*schemaSelection->currentIndex()) + index));
+    instanceFile.open(QIODevice::ReadOnly);
+    const QString instanceText(QString::fromUtf8(instanceFile.readAll()));
+    instanceEdit->setPlainText(instanceText);
+
+    validate();
+}
+//! [2]
+
+//! [3]
+void MainWindow::validate()
+{
+    const QByteArray schemaData = schemaView->toPlainText().toUtf8();
+    const QByteArray instanceData = instanceEdit->toPlainText().toUtf8();
+
+    MessageHandler messageHandler;
+
+    QXmlSchema schema;
+    schema.setMessageHandler(&messageHandler);
+
+    schema.load(schemaData);
+
+    bool errorOccurred = false;
+    if (!schema.isValid()) {
+        errorOccurred = true;
+    } else {
+        QXmlSchemaValidator validator(schema);
+        if (!validator.validate(instanceData))
+            errorOccurred = true;
+    }
+
+    if (errorOccurred) {
+        validationStatus->setText(messageHandler.statusMessage());
+        moveCursor(messageHandler.line(), messageHandler.column());
+    } else {
+        validationStatus->setText(tr("validation successful"));
+    }
+
+    const QString styleSheet = QString("QLabel {background: %1; padding: 3px}")
+                                      .arg(errorOccurred ? QColor(Qt::red).lighter(160).name() :
+                                                           QColor(Qt::green).lighter(160).name());
+    validationStatus->setStyleSheet(styleSheet);
+}
+//! [3]
+
+void MainWindow::textChanged()
+{
+    instanceEdit->setExtraSelections(QList<QTextEdit::ExtraSelection>());
+}
+
+void MainWindow::moveCursor(int line, int column)
+{
+    instanceEdit->moveCursor(QTextCursor::Start);
+    for (int i = 1; i < line; ++i)
+        instanceEdit->moveCursor(QTextCursor::Down);
+
+    for (int i = 1; i < column; ++i)
+        instanceEdit->moveCursor(QTextCursor::Right);
+
+    QList<QTextEdit::ExtraSelection> extraSelections;
+    QTextEdit::ExtraSelection selection;
+
+    const QColor lineColor = QColor(Qt::red).lighter(160);
+    selection.format.setBackground(lineColor);
+    selection.format.setProperty(QTextFormat::FullWidthSelection, true);
+    selection.cursor = instanceEdit->textCursor();
+    selection.cursor.clearSelection();
+    extraSelections.append(selection);
+
+    instanceEdit->setExtraSelections(extraSelections);
+
+    instanceEdit->setFocus();
+}