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50
51 #include <QtWidgets/QMessageBox>
52 #include <QtWidgets/QFileDialog>
53 #include <QtXmlPatterns>
54
55 #include "querymainwindow.h"
56 #include "xmlsyntaxhighlighter.h"
57
58 //! [0]
QueryMainWindow()59 QueryMainWindow::QueryMainWindow()
60 {
61 setupUi(this);
62
63 new XmlSyntaxHighlighter(findChild<QTextEdit*>("inputTextEdit")->document());
64 new XmlSyntaxHighlighter(findChild<QTextEdit*>("outputTextEdit")->document());
65
66 ui_defaultQueries = findChild<QComboBox*>("defaultQueries");
67 QMetaObject::connectSlotsByName(this);
68
69 connect(ui_defaultQueries, QOverload<int>::of(&QComboBox::currentIndexChanged),
70 this, &QueryMainWindow::displayQuery);
71
72 loadInputFile();
73 const QStringList queries(QDir(":/files/", "*.xq").entryList());
74 for (const auto &query : queries)
75 ui_defaultQueries->addItem(query);
76 if (queries.count() > 0)
77 displayQuery(0);
78 }
79 //! [0]
80
81
82 //! [1]
displayQuery(int index)83 void QueryMainWindow::displayQuery(int index)
84 {
85 QFile queryFile(QString(":files/") + ui_defaultQueries->itemText(index));
86 queryFile.open(QIODevice::ReadOnly);
87 const QString query(QString::fromLatin1(queryFile.readAll()));
88 findChild<QTextEdit*>("queryTextEdit")->setPlainText(query);
89
90 evaluate(query);
91 }
92 //! [1]
93
94
loadInputFile()95 void QueryMainWindow::loadInputFile()
96 {
97 QFile forView;
98 forView.setFileName(":/files/cookbook.xml");
99 if (!forView.open(QIODevice::ReadOnly)) {
100 QMessageBox::information(this,
101 tr("Unable to open file"), forView.errorString());
102 return;
103 }
104
105 QTextStream in(&forView);
106 QString inputDocument = in.readAll();
107 findChild<QTextEdit*>("inputTextEdit")->setPlainText(inputDocument);
108 }
109
110
111 //! [2]
evaluate(const QString & str)112 void QueryMainWindow::evaluate(const QString &str)
113 {
114 QFile sourceDocument;
115 sourceDocument.setFileName(":/files/cookbook.xml");
116 sourceDocument.open(QIODevice::ReadOnly);
117
118 QByteArray outArray;
119 QBuffer buffer(&outArray);
120 buffer.open(QIODevice::ReadWrite);
121
122 QXmlQuery query;
123 query.bindVariable("inputDocument", &sourceDocument);
124 query.setQuery(str);
125 if (!query.isValid())
126 return;
127
128 QXmlFormatter formatter(query, &buffer);
129 if (!query.evaluateTo(&formatter))
130 return;
131
132 buffer.close();
133 findChild<QTextEdit*>("outputTextEdit")->setPlainText(QString::fromUtf8(outArray.constData()));
134
135 }
136 //! [2]
137
138