/****************************************************************************

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

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** Foundation and appearing in the file LICENSE.LGPL included in the

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****************************************************************************/

#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();

}