source: trunk/doc/src/snippets/textdocument-frames/mainwindow.cpp@ 835

Last change on this file since 835 was 651, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.2 sources.
File size: 6.0 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the documentation 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
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15**
16** GNU Lesser General Public License Usage
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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
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28** GNU General Public License Usage
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40****************************************************************************/
41
42#include <QtGui>
43
44#include "mainwindow.h"
45#include "xmlwriter.h"
46
47MainWindow::MainWindow()
48{
49 QMenu *fileMenu = new QMenu(tr("&File"));
50
51 QAction *saveAction = fileMenu->addAction(tr("&Save..."));
52 saveAction->setShortcut(tr("Ctrl+S"));
53
54 QAction *quitAction = fileMenu->addAction(tr("E&xit"));
55 quitAction->setShortcut(tr("Ctrl+Q"));
56
57 menuBar()->addMenu(fileMenu);
58 editor = new QTextEdit();
59
60 QTextCursor cursor(editor->textCursor());
61 cursor.movePosition(QTextCursor::Start);
62
63 QTextFrame *mainFrame = cursor.currentFrame();
64
65 QTextCharFormat plainCharFormat;
66 QTextCharFormat boldCharFormat;
67 boldCharFormat.setFontWeight(QFont::Bold);
68/* main frame
69//! [0]
70 QTextFrame *mainFrame = cursor.currentFrame();
71 cursor.insertText(...);
72//! [0]
73*/
74 cursor.insertText("Text documents are represented by the "
75 "QTextDocument class, rather than by QString objects. "
76 "Each QTextDocument object contains information about "
77 "the document's internal representation, its structure, "
78 "and keeps track of modifications to provide undo/redo "
79 "facilities. This approach allows features such as the "
80 "layout management to be delegated to specialized "
81 "classes, but also provides a focus for the framework.",
82 plainCharFormat);
83
84//! [1]
85 QTextFrameFormat frameFormat;
86 frameFormat.setMargin(32);
87 frameFormat.setPadding(8);
88 frameFormat.setBorder(4);
89//! [1]
90 cursor.insertFrame(frameFormat);
91
92/* insert frame
93//! [2]
94 cursor.insertFrame(frameFormat);
95 cursor.insertText(...);
96//! [2]
97*/
98 cursor.insertText("Documents are either converted from external sources "
99 "or created from scratch using Qt. The creation process "
100 "can done by an editor widget, such as QTextEdit, or by "
101 "explicit calls to the Scribe API.", boldCharFormat);
102
103 cursor = mainFrame->lastCursorPosition();
104/* last cursor
105//! [3]
106 cursor = mainFrame->lastCursorPosition();
107 cursor.insertText(...);
108//! [3]
109*/
110 cursor.insertText("There are two complementary ways to visualize the "
111 "contents of a document: as a linear buffer that is "
112 "used by editors to modify the contents, and as an "
113 "object hierarchy containing structural information "
114 "that is useful to layout engines. In the hierarchical "
115 "model, the objects generally correspond to visual "
116 "elements such as frames, tables, and lists. At a lower "
117 "level, these elements describe properties such as the "
118 "style of text used and its alignment. The linear "
119 "representation of the document is used for editing and "
120 "manipulation of the document's contents.",
121 plainCharFormat);
122
123
124 connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
125 connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
126
127 setCentralWidget(editor);
128 setWindowTitle(tr("Text Document Frames"));
129}
130
131void MainWindow::saveFile()
132{
133 QString fileName = QFileDialog::getSaveFileName(this,
134 tr("Save document as:"), "", tr("XML (*.xml)"));
135
136 if (!fileName.isEmpty()) {
137 if (writeXml(fileName))
138 setWindowTitle(fileName);
139 else
140 QMessageBox::warning(this, tr("Warning"),
141 tr("Failed to save the document."), QMessageBox::Cancel,
142 QMessageBox::NoButton);
143 }
144}
145bool MainWindow::writeXml(const QString &fileName)
146{
147 XmlWriter documentWriter(editor->document());
148
149 QDomDocument *domDocument = documentWriter.toXml();
150 QFile file(fileName);
151
152 if (file.open(QFile::WriteOnly)) {
153 QTextStream textStream(&file);
154 textStream.setCodec(QTextCodec::codecForName("UTF-8"));
155
156 textStream << domDocument->toString(1).toUtf8();
157 file.close();
158 return true;
159 }
160 else
161 return false;
162}
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