source: trunk/examples/xmlpatterns/recipes/querymainwindow.cpp@ 651

Last change on this file since 651 was 651, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.2 sources.

File size: 4.1 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
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11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
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25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
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40****************************************************************************/
41
42#include <QtGui>
43#include <QtXmlPatterns>
44
45#include "querymainwindow.h"
46#include "xmlsyntaxhighlighter.h"
47
48//! [0]
49QueryMainWindow::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]
70void 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
82void 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]
99void 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
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