в 14:21, 25 мая 2010

2010-05-25T14:21:06Z

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2010-05-25T10:24:40Z

1 версия: Импорт контента...

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==QTextList and QTextListFormat==

<source lang="cpp">
/****************************************************************************
**
** 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();
}

</source>

==Using QTextList==

<source lang="cpp">
/****************************************************************************
**
** 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();
}

</source>

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