mainwindow.cpp Example File

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#include <QtGui> #include <QtXmlPatterns> #include "mainwindow.h" #include "xmlsyntaxhighlighter.h" 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_description = description; m_sourceLocation = sourceLocation; } private: QString m_description; QSourceLocation m_sourceLocation; }; 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); } 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(); const QString fileName = QStringLiteral(":/schema_") + QString::number(index) + QStringLiteral(".xsd"); QFile schemaFile(fileName); if (! { qWarning() << "Cannot open" << QDir::toNativeSeparators(fileName) << ':' << schemaFile.errorString(); return; } const QString schemaText(QString::fromUtf8(schemaFile.readAll())); schemaView->setPlainText(schemaText); validate(); } void MainWindow::instanceSelected(int index) { if (index < 0) { instanceEdit->setPlainText(QString()); return; } const QString fileName = QStringLiteral(":/instance_") + QString::number(2 * schemaSelection->currentIndex() + index) + QStringLiteral(".xml"); QFile instanceFile(fileName); if (! { qWarning() << "Cannot open" << QDir::toNativeSeparators(fileName) << ':' << instanceFile.errorString(); return; } const QString instanceText(QString::fromUtf8(instanceFile.readAll())); instanceEdit->setPlainText(instanceText); validate(); } 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); } 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(); }

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