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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the documentation of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    18 ** General Public License version 2.1 as published by the Free Software

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "mainwindow.h"

    45 #include "xmlwriter.h"

    46 

    47 MainWindow::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 

   131 void 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 }

   145 bool 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 }