Qt GUI: Adding Rich Text Processing documentation from qtdoc

-included the snippets
-editing for technical accuracy still to be done.
-ported missing files from Qt 4

Change-Id: I0b2d27630b762c6518c08973a40b476d7852001d
Reviewed-by: Eskil Abrahamsen Blomfeldt <[email protected]>

1 files changed, 124 insertions, 0 deletions

diff --git a/src/gui/doc/snippets/textdocument-printing/mainwindow.cpp b/src/gui/doc/snippets/textdocument-printing/mainwindow.cpp
new file mode 100644
index 00000000000..6abe90a3d3a
--- /dev/null
+++ b/src/gui/doc/snippets/textdocument-printing/mainwindow.cpp
@@ -0,0 +1,124 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"));
+
+    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
+                        QKeySequence(tr("Ctrl+O", "File|Open")));
+
+    printAction = fileMenu->addAction(tr("&Print..."), this, SLOT(printFile()));
+    printAction->setEnabled(false);
+
+    pdfPrintAction = fileMenu->addAction(tr("Print as P&DF..."), this, SLOT(printPdf()));
+    pdfPrintAction->setEnabled(false);
+
+    fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
+                        QKeySequence(tr("Ctrl+Q", "File|Exit")));
+
+    menuBar()->addMenu(fileMenu);
+
+    editor = new QTextEdit(this);
+    document = new QTextDocument(this);
+    editor->setDocument(document);
+
+    connect(editor, SIGNAL(selectionChanged()), this, SLOT(updateMenus()));
+
+    setCentralWidget(editor);
+    setWindowTitle(tr("Text Document Writer"));
+}
+
+void MainWindow::openFile()
+{
+    QString fileName = QFileDialog::getOpenFileName(this,
+        tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
+
+    if (!fileName.isEmpty()) {
+        QFileInfo info(fileName);
+        if (info.completeSuffix() == "html") {
+            QFile file(fileName);
+
+            if (file.open(QIODevice::ReadOnly)) {
+                editor->setHtml(file.readAll());
+                file.close();
+                currentFile = fileName;
+            }
+        } else if (info.completeSuffix() == "txt") {
+            QFile file(fileName);
+
+            if (file.open(QIODevice::ReadOnly)) {
+                editor->setPlainText(file.readAll());
+                file.close();
+                currentFile = fileName;
+            }
+        }
+        printAction->setEnabled(true);
+        pdfPrintAction->setEnabled(true);
+    }
+}
+
+void MainWindow::printFile()
+{
+//! [0]
+    QTextDocument *document = editor->document();
+    QPrinter printer;
+
+    QPrintDialog *dlg = new QPrintDialog(&printer, this);
+    if (dlg->exec() != QDialog::Accepted)
+        return;
+
+    document->print(&printer);
+//! [0]
+}
+
+void MainWindow::printPdf()
+{
+    QPrinter printer(QPrinter::HighResolution);
+    printer.setOutputFormat(QPrinter::PdfFormat);
+
+    QPrintDialog *printDialog = new QPrintDialog(&printer, this);
+    if (printDialog->exec() == QDialog::Accepted)
+        editor->document()->print(&printer);
+}