diff options
Diffstat (limited to 'doc/codesnippets/doc/src/snippets/textdocument-selections/mainwindow.cpp')
| -rw-r--r-- | doc/codesnippets/doc/src/snippets/textdocument-selections/mainwindow.cpp | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/textdocument-selections/mainwindow.cpp b/doc/codesnippets/doc/src/snippets/textdocument-selections/mainwindow.cpp new file mode 100644 index 000000000..95f6a119d --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/textdocument-selections/mainwindow.cpp @@ -0,0 +1,204 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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"))); + + QAction *quitAction = fileMenu->addAction(tr("E&xit"), this, SLOT(close())); + quitAction->setShortcut(tr("Ctrl+Q")); + + QMenu *editMenu = new QMenu(tr("&Edit")); + + cutAction = editMenu->addAction(tr("Cu&t"), this, SLOT(cutSelection())); + cutAction->setShortcut(tr("Ctrl+X")); + cutAction->setEnabled(false); + + copyAction = editMenu->addAction(tr("&Copy"), this, SLOT(copySelection())); + copyAction->setShortcut(tr("Ctrl+C")); + copyAction->setEnabled(false); + + pasteAction = editMenu->addAction(tr("&Paste"), this, SLOT(pasteSelection())); + pasteAction->setShortcut(tr("Ctrl+V")); + pasteAction->setEnabled(false); + + 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())); + + menuBar()->addMenu(fileMenu); + menuBar()->addMenu(editMenu); + menuBar()->addMenu(selectMenu); + + 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(QFile::ReadOnly)) { + editor->setHtml(QString(file.readAll())); + file.close(); + currentFile = fileName; + } + } else if (info.completeSuffix() == "txt") { + QFile file(fileName); + + if (file.open(QFile::ReadOnly)) { + editor->setPlainText(file.readAll()); + file.close(); + currentFile = fileName; + } + } + } +} + +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(); + +//! [0] + cursor.beginEditBlock(); +//! [1] + cursor.movePosition(QTextCursor::StartOfWord); + cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor); +//! [1] + cursor.endEditBlock(); +//! [0] + + 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::updateMenus() +{ + QTextCursor cursor = editor->textCursor(); + cutAction->setEnabled(cursor.hasSelection()); + copyAction->setEnabled(cursor.hasSelection()); + + pasteAction->setEnabled(!selection.isEmpty()); +} |