source: trunk/doc/src/snippets/textdocument-frames/mainwindow.cpp@ 846

Last change on this file since 846 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

File size: 6.1 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 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** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41#include <QtGui>
42
43#include "mainwindow.h"
44#include "xmlwriter.h"
45
46MainWindow::MainWindow()
47{
48 QMenu *fileMenu = new QMenu(tr("&File"));
49
50 QAction *saveAction = fileMenu->addAction(tr("&Save..."));
51 saveAction->setShortcut(tr("Ctrl+S"));
52
53 QAction *quitAction = fileMenu->addAction(tr("E&xit"));
54 quitAction->setShortcut(tr("Ctrl+Q"));
55
56 menuBar()->addMenu(fileMenu);
57 editor = new QTextEdit();
58
59 QTextCursor cursor(editor->textCursor());
60 cursor.movePosition(QTextCursor::Start);
61
62 QTextFrame *mainFrame = cursor.currentFrame();
63
64 QTextCharFormat plainCharFormat;
65 QTextCharFormat boldCharFormat;
66 boldCharFormat.setFontWeight(QFont::Bold);
67/* main frame
68//! [0]
69 QTextFrame *mainFrame = cursor.currentFrame();
70 cursor.insertText(...);
71//! [0]
72*/
73 cursor.insertText("Text documents are represented by the "
74 "QTextDocument class, rather than by QString objects. "
75 "Each QTextDocument object contains information about "
76 "the document's internal representation, its structure, "
77 "and keeps track of modifications to provide undo/redo "
78 "facilities. This approach allows features such as the "
79 "layout management to be delegated to specialized "
80 "classes, but also provides a focus for the framework.",
81 plainCharFormat);
82
83//! [1]
84 QTextFrameFormat frameFormat;
85 frameFormat.setMargin(32);
86 frameFormat.setPadding(8);
87 frameFormat.setBorder(4);
88//! [1]
89 cursor.insertFrame(frameFormat);
90
91/* insert frame
92//! [2]
93 cursor.insertFrame(frameFormat);
94 cursor.insertText(...);
95//! [2]
96*/
97 cursor.insertText("Documents are either converted from external sources "
98 "or created from scratch using Qt. The creation process "
99 "can done by an editor widget, such as QTextEdit, or by "
100 "explicit calls to the Scribe API.", boldCharFormat);
101
102 cursor = mainFrame->lastCursorPosition();
103/* last cursor
104//! [3]
105 cursor = mainFrame->lastCursorPosition();
106 cursor.insertText(...);
107//! [3]
108*/
109 cursor.insertText("There are two complementary ways to visualize the "
110 "contents of a document: as a linear buffer that is "
111 "used by editors to modify the contents, and as an "
112 "object hierarchy containing structural information "
113 "that is useful to layout engines. In the hierarchical "
114 "model, the objects generally correspond to visual "
115 "elements such as frames, tables, and lists. At a lower "
116 "level, these elements describe properties such as the "
117 "style of text used and its alignment. The linear "
118 "representation of the document is used for editing and "
119 "manipulation of the document's contents.",
120 plainCharFormat);
121
122
123 connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
124 connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
125
126 setCentralWidget(editor);
127 setWindowTitle(tr("Text Document Frames"));
128}
129
130void MainWindow::saveFile()
131{
132 QString fileName = QFileDialog::getSaveFileName(this,
133 tr("Save document as:"), "", tr("XML (*.xml)"));
134
135 if (!fileName.isEmpty()) {
136 if (writeXml(fileName))
137 setWindowTitle(fileName);
138 else
139 QMessageBox::warning(this, tr("Warning"),
140 tr("Failed to save the document."), QMessageBox::Cancel,
141 QMessageBox::NoButton);
142 }
143}
144bool MainWindow::writeXml(const QString &fileName)
145{
146 XmlWriter documentWriter(editor->document());
147
148 QDomDocument *domDocument = documentWriter.toXml();
149 QFile file(fileName);
150
151 if (file.open(QFile::WriteOnly)) {
152 QTextStream textStream(&file);
153 textStream.setCodec(QTextCodec::codecForName("UTF-8"));
154
155 textStream << domDocument->toString(1).toUtf8();
156 file.close();
157 return true;
158 }
159 else
160 return false;
161}
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