querymainwindow.cpp Example File
xmlpatterns/recipes/querymainwindow.cpp
#include <QtGui>
#include <QtXmlPatterns>
#include "querymainwindow.h"
QueryMainWindow::QueryMainWindow() : ui_defaultQueries(0)
{
setupUi(this);
ui_defaultQueries = qFindChild<QComboBox*>(this, "defaultQueries");
QMetaObject::connectSlotsByName(this);
connect(ui_defaultQueries, SIGNAL(currentIndexChanged(int)), SLOT(displayQuery(int)));
loadInputFile();
const QStringList queries(QDir(":/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()));
qFindChild<QTextEdit*>(this, "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 in(&forView);
QString inputDocument = in.readAll();
qFindChild<QTextEdit*>(this, "inputTextEdit")->setPlainText(inputDocument);
}
void QueryMainWindow::evaluate(const QString &str)
{
QXmlQuery query;
QFile sourceDocument;
sourceDocument.setFileName(":/files/cookbook.xml");
sourceDocument.open(QIODevice::ReadOnly);
query.bindVariable("inputDocument", &sourceDocument);
query.setQuery(str);
if(!query.isValid())
return;
QByteArray outArray;
QBuffer buffer(&outArray);
buffer.open(QIODevice::ReadWrite);
QXmlFormatter formatter(query, &buffer);
if(!query.evaluateTo(&formatter))
return;
buffer.close();
qFindChild<QTextEdit*>(this, "outputTextEdit")->setPlainText(QString::fromUtf8(outArray.constData()));
}
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Qt 4.4.3 |