querymainwindow.cpp Example File | Qt 4.8 (original) (raw)

xmlpatterns/recipes/querymainwindow.cpp

#include #include

#include "querymainwindow.h" #include "xmlsyntaxhighlighter.h"

QueryMainWindow::QueryMainWindow() : ui_defaultQueries(0) { setupUi(this);

new XmlSyntaxHighlighter(findChild<[QTextEdit](qtextedit.html)*>("inputTextEdit")->document());
new XmlSyntaxHighlighter(findChild<[QTextEdit](qtextedit.html)*>("outputTextEdit")->document());

ui_defaultQueries = findChild<[QComboBox](qcombobox.html)*>("defaultQueries");
[QMetaObject](qmetaobject.html)::connectSlotsByName(this);
connect(ui_defaultQueries, SIGNAL(currentIndexChanged(int)), SLOT(displayQuery(int)));

loadInputFile();
const [QStringList](qstringlist.html) queries([QDir](qdir.html)(":/files/", "*.xq").entryList());
int len = queries.count();
for(int i = 0; i < len; ++i)
    ui_defaultQueries->addItem(queries.at(i));

}

void QueryMainWindow::displayQuery(int index) { QFile queryFile(QString(":files/") + ui_defaultQueries->itemText(index)); queryFile.open(QIODevice::ReadOnly); const QString query(QString::fromLatin1(queryFile.readAll())); findChild<QTextEdit*>("queryTextEdit")->setPlainText(query);

evaluate(query);

}

void QueryMainWindow::loadInputFile() { QFile forView; forView.setFileName(":/files/cookbook.xml"); if (!forView.open(QIODevice::ReadOnly)) { QMessageBox::information(this, tr("Unable to open file"), forView.errorString()); return; }

[QTextStream](qtextstream.html) in(&forView);
[QString](qstring.html) inputDocument = in.readAll();
findChild<[QTextEdit](qtextedit.html)*>("inputTextEdit")->setPlainText(inputDocument);

}

void QueryMainWindow::evaluate(const QString &str) { QFile sourceDocument; sourceDocument.setFileName(":/files/cookbook.xml"); sourceDocument.open(QIODevice::ReadOnly);

[QByteArray](qbytearray.html) outArray;
[QBuffer](qbuffer.html) buffer(&outArray);
buffer.open([QIODevice](qiodevice.html)::ReadWrite);

[QXmlQuery](qxmlquery.html) query;
query.bindVariable("inputDocument", &sourceDocument);
query.setQuery(str);
if (!query.isValid())
    return;

[QXmlFormatter](qxmlformatter.html) formatter(query, &buffer);
if (!query.evaluateTo(&formatter))
    return;

buffer.close();
findChild<[QTextEdit](qtextedit.html)*>("outputTextEdit")->setPlainText([QString](qstring.html)::fromUtf8(outArray.constData()));

}

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