doc/src/snippets/textdocument-listitems/mainwindow.cpp
changeset 7 f7bc934e204c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/textdocument-listitems/mainwindow.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"));
+
+    fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
+        QKeySequence(tr("Ctrl+Q", "File|Exit")));
+
+    QMenu *actionsMenu = new QMenu(tr("&Actions"));
+    actionsMenu->addAction(tr("&Highlight List Items"),
+                        this, SLOT(highlightListItems()));
+    actionsMenu->addAction(tr("&Show Current List"), this, SLOT(showList()));
+
+    QMenu *insertMenu = new QMenu(tr("&Insert"));
+
+    insertMenu->addAction(tr("&List"), this, SLOT(insertList()),
+        QKeySequence(tr("Ctrl+L", "Insert|List")));
+
+    menuBar()->addMenu(fileMenu);
+    menuBar()->addMenu(insertMenu);
+    menuBar()->addMenu(actionsMenu);
+
+    editor = new QTextEdit(this);
+    document = new QTextDocument(this);
+    editor->setDocument(document);
+
+    setCentralWidget(editor);
+    setWindowTitle(tr("Text Document List Items"));
+}
+
+void MainWindow::highlightListItems()
+{
+    QTextCursor cursor = editor->textCursor();
+    QTextList *list = cursor.currentList();
+
+    if (!list)
+        return;
+
+    cursor.beginEditBlock();
+//! [0]
+    for (int index = 0; index < list->count(); ++index) {
+        QTextBlock listItem = list->item(index);
+//! [0]
+        QTextBlockFormat newBlockFormat = listItem.blockFormat();
+        newBlockFormat.setBackground(Qt::lightGray);
+        QTextCursor itemCursor = cursor;
+        itemCursor.setPosition(listItem.position());
+        //itemCursor.movePosition(QTextCursor::StartOfBlock);
+        itemCursor.movePosition(QTextCursor::EndOfBlock,
+                                QTextCursor::KeepAnchor);
+        itemCursor.setBlockFormat(newBlockFormat);
+        /*
+//! [1]
+        processListItem(listItem);
+//! [1]
+        */
+//! [2]
+    }
+//! [2]
+    cursor.endEditBlock();
+}
+
+void MainWindow::showList()
+{
+    QTextCursor cursor = editor->textCursor();
+    QTextFrame *frame = cursor.currentFrame();
+
+    if (!frame)
+        return;
+
+    QTreeWidget *treeWidget = new QTreeWidget;
+    treeWidget->setColumnCount(1);
+    QStringList headerLabels;
+    headerLabels << tr("Lists");
+    treeWidget->setHeaderLabels(headerLabels);
+
+    QTreeWidgetItem *parentItem = 0;
+    QTreeWidgetItem *item;
+    QTreeWidgetItem *lastItem = 0;
+    parentItems.clear();
+    previousItems.clear();
+
+//! [3]
+    QTextFrame::iterator it;
+    for (it = frame->begin(); !(it.atEnd()); ++it) {
+
+        QTextBlock block = it.currentBlock();
+
+        if (block.isValid()) {
+
+            QTextList *list = block.textList();
+
+            if (list) {
+                int index = list->itemNumber(block);
+//! [3]
+                if (index == 0) {
+                    parentItems.append(parentItem);
+                    previousItems.append(lastItem);
+                    listStructures.append(list);
+                    parentItem = lastItem;
+                    lastItem = 0;
+
+                    if (parentItem != 0)
+                        item = new QTreeWidgetItem(parentItem, lastItem);
+                    else
+                        item = new QTreeWidgetItem(treeWidget, lastItem);
+
+                } else {
+
+                    while (parentItem != 0 && listStructures.last() != list) {
+                        listStructures.pop_back();
+                        parentItem = parentItems.takeLast();
+                        lastItem = previousItems.takeLast();
+                    }
+                    if (parentItem != 0)
+                        item = new QTreeWidgetItem(parentItem, lastItem);
+                    else
+                        item = new QTreeWidgetItem(treeWidget, lastItem);
+                }
+                item->setText(0, block.text());
+                lastItem = item;
+                /*
+//! [4]
+                processListItem(list, index);
+//! [4]
+                */
+//! [5]
+            }
+//! [5] //! [6]
+        }
+//! [6] //! [7]
+    }
+//! [7]
+
+    treeWidget->setWindowTitle(tr("List Contents"));
+    treeWidget->show();
+}
+
+void MainWindow::insertList()
+{
+    QTextCursor cursor = editor->textCursor();
+    cursor.beginEditBlock();
+
+    QTextList *list = cursor.currentList();
+    QTextListFormat listFormat;
+    if (list)
+        listFormat = list->format();
+
+    listFormat.setStyle(QTextListFormat::ListDisc);
+    listFormat.setIndent(listFormat.indent() + 1);
+    cursor.insertList(listFormat);
+
+    cursor.endEditBlock();
+}