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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include <QtXmlPatterns>

    44 

    45 #include "querymainwindow.h"

    46 #include "xmlsyntaxhighlighter.h"

    47 

    48 //! [0]

    49 QueryMainWindow::QueryMainWindow() : ui_defaultQueries(0)

    50 {

    51     setupUi(this);

    52 

    53     new XmlSyntaxHighlighter(qFindChild<QTextEdit*>(this, "inputTextEdit")->document());

    54     new XmlSyntaxHighlighter(qFindChild<QTextEdit*>(this, "outputTextEdit")->document());

    55 

    56     ui_defaultQueries = qFindChild<QComboBox*>(this, "defaultQueries");

    57     QMetaObject::connectSlotsByName(this);

    58     connect(ui_defaultQueries, SIGNAL(currentIndexChanged(int)), SLOT(displayQuery(int)));

    59 

    60     loadInputFile();

    61     const QStringList queries(QDir(":/files/", "*.xq").entryList());

    62     int len = queries.count();

    63     for(int i = 0; i < len; ++i)

    64         ui_defaultQueries->addItem(queries.at(i));

    65 }

    66 //! [0]

    67 

    68 

    69 //! [1]

    70 void QueryMainWindow::displayQuery(int index)

    71 {

    72     QFile queryFile(QString(":files/") + ui_defaultQueries->itemText(index));

    73     queryFile.open(QIODevice::ReadOnly);

    74     const QString query(QString::fromLatin1(queryFile.readAll()));

    75     qFindChild<QTextEdit*>(this, "queryTextEdit")->setPlainText(query);

    76 

    77     evaluate(query);

    78 }

    79 //! [1]

    80 

    81 

    82 void QueryMainWindow::loadInputFile()

    83 {

    84     QFile forView;

    85     forView.setFileName(":/files/cookbook.xml");

    86     if (!forView.open(QIODevice::ReadOnly)) {

    87         QMessageBox::information(this,

    88             tr("Unable to open file"), forView.errorString());

    89         return;

    90     }

    91 

    92     QTextStream in(&forView);

    93     QString inputDocument = in.readAll();

    94     qFindChild<QTextEdit*>(this, "inputTextEdit")->setPlainText(inputDocument);

    95 }

    96 

    97 

    98 //! [2]

    99 void QueryMainWindow::evaluate(const QString &str)

   100 {

   101     QFile sourceDocument;

   102     sourceDocument.setFileName(":/files/cookbook.xml");

   103     sourceDocument.open(QIODevice::ReadOnly);

   104 

   105     QByteArray outArray;

   106     QBuffer buffer(&outArray);

   107     buffer.open(QIODevice::ReadWrite);

   108 

   109     QXmlQuery query;

   110     query.bindVariable("inputDocument", &sourceDocument);

   111     query.setQuery(str);

   112     if (!query.isValid())

   113         return;

   114 

   115     QXmlFormatter formatter(query, &buffer);

   116     if (!query.evaluateTo(&formatter))

   117         return;

   118 

   119     buffer.close();

   120     qFindChild<QTextEdit*>(this, "outputTextEdit")->setPlainText(QString::fromUtf8(outArray.constData()));

   121 

   122 }

   123 //! [2]

   124