C++/Qt/QTextList

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QTextList and QTextListFormat

  
/****************************************************************************
**
** Copyright (C) 2009 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
#include <QTextDocumentFragment>
class QAction;
class QTextDocument;
class QTextEdit;
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
public slots:
    void cutSelection();
    void copySelection();
    void insertList();
    void pasteSelection();
    void selectWord();
    void selectLine();
    void selectBlock();
    void selectFrame();
    void updateMenus();
private:
    QAction *cutAction;
    QAction *copyAction;
    QAction *pasteAction;
    QString currentFile;
    QTextEdit *editor;
    QTextDocument *document;
    QTextDocumentFragment selection;
};
#endif



#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 *editMenu = new QMenu(tr("&Edit"));
    cutAction = editMenu->addAction(tr("Cu&t"), this, SLOT(cutSelection()),
        QKeySequence(tr("Ctrl+X", "Edit|Cut")));
    copyAction = editMenu->addAction(tr("&Copy"), this, SLOT(copySelection()),
        QKeySequence(tr("Ctrl+C", "Edit|Copy")));
    pasteAction = editMenu->addAction(tr("&Paste"), this,
        SLOT(pasteSelection()), QKeySequence(tr("Ctrl+V", "Edit|Paste")));
    QMenu *selectMenu = new QMenu(tr("&Select"));
    selectMenu->addAction(tr("&Word"), this, SLOT(selectWord()));
    selectMenu->addAction(tr("&Line"), this, SLOT(selectLine()));
    selectMenu->addAction(tr("&Block"), this, SLOT(selectBlock()));
    selectMenu->addAction(tr("&Frame"), this, SLOT(selectFrame()));
    QMenu *insertMenu = new QMenu(tr("&Insert"));
    insertMenu->addAction(tr("&List"), this, SLOT(insertList()),
        QKeySequence(tr("Ctrl+L", "Insert|List")));
    menuBar()->addMenu(fileMenu);
    menuBar()->addMenu(editMenu);
    menuBar()->addMenu(selectMenu);
    menuBar()->addMenu(insertMenu);
    editor = new QTextEdit(this);
    document = new QTextDocument(this);
    editor->setDocument(document);
    connect(editor, SIGNAL(selectionChanged()), this, SLOT(updateMenus()));
    updateMenus();
    setCentralWidget(editor);
    setWindowTitle(tr("Text Document Writer"));
}
void MainWindow::cutSelection()
{
    QTextCursor cursor = editor->textCursor();
    if (cursor.hasSelection()) {
        selection = cursor.selection();
        cursor.removeSelectedText();
    }
}
void MainWindow::copySelection()
{
    QTextCursor cursor = editor->textCursor();
    if (cursor.hasSelection()) {
        selection = cursor.selection();
        cursor.clearSelection();
    }
}
void MainWindow::pasteSelection()
{
    QTextCursor cursor = editor->textCursor();
    cursor.insertFragment(selection);
}
void MainWindow::selectWord()
{
    QTextCursor cursor = editor->textCursor();
    QTextBlock block = cursor.block();
    cursor.beginEditBlock();
    cursor.movePosition(QTextCursor::StartOfWord);
    cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
    cursor.endEditBlock();
    editor->setTextCursor(cursor);
}
void MainWindow::selectLine()
{
    QTextCursor cursor = editor->textCursor();
    QTextBlock block = cursor.block();
    cursor.beginEditBlock();
    cursor.movePosition(QTextCursor::StartOfLine);
    cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
    cursor.endEditBlock();
    editor->setTextCursor(cursor);
}
void MainWindow::selectBlock()
{
    QTextCursor cursor = editor->textCursor();
    QTextBlock block = cursor.block();
    cursor.beginEditBlock();
    cursor.movePosition(QTextCursor::StartOfBlock);
    cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
    cursor.endEditBlock();
    editor->setTextCursor(cursor);
}
void MainWindow::selectFrame()
{
    QTextCursor cursor = editor->textCursor();
    QTextFrame *frame = cursor.currentFrame();
    cursor.beginEditBlock();
    cursor.setPosition(frame->firstPosition());
    cursor.setPosition(frame->lastPosition(), QTextCursor::KeepAnchor);
    cursor.endEditBlock();
    editor->setTextCursor(cursor);
}
void MainWindow::insertList()
{
    QTextCursor cursor = editor->textCursor();
    cursor.beginEditBlock();
    QTextList *list = cursor.currentList();
    QTextListFormat listFormat;
    if (list) {
        listFormat = list->format();
        listFormat.setIndent(listFormat.indent() + 1);
    }
    listFormat.setStyle(QTextListFormat::ListDisc);
    cursor.insertList(listFormat);

    cursor.endEditBlock();
}
void MainWindow::updateMenus()
{
    QTextCursor cursor = editor->textCursor();
    cutAction->setEnabled(cursor.hasSelection());
    copyAction->setEnabled(cursor.hasSelection());
    pasteAction->setEnabled(!selection.isEmpty());
}


#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow *window = new MainWindow;
    window->resize(640, 480);
    window->show();
    return app.exec();
}


Using QTextList

  
/****************************************************************************
**
** Copyright (C) 2009 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QList>
#include <QMainWindow>
#include <QString>
class QAction;
class QTextDocument;
class QTextEdit;
class QTextList;
class QTreeWidgetItem;
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow();
public slots:
    void insertList();
    void highlightListItems();
    void showList();
private:
    QString currentFile;
    QTextEdit *editor;
    QTextDocument *document;
    QList<QTextList*> listStructures;
    QList<QTreeWidgetItem*> previousItems;
    QList<QTreeWidgetItem*> parentItems;
};
#endif



#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();
    for (int index = 0; index < list->count(); ++index) {
        QTextBlock listItem = list->item(index);
        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);
        /*
        processListItem(listItem);
        */
    }
    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();

    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);
                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;
            }
 
        }
 
    }

    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();
}



#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow *window = new MainWindow;
    window->resize(640, 480);
    window->show();
    return app.exec();
}