cpython.git - https://github.com/python/cpython.git

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Diffstat (limited to 'Python/condvar.h')

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/**************************************************************************** ** ** 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. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] class AppendText : public QUndoCommand { public: AppendText(QString *doc, const QString &text) : m_document(doc), m_text(text) { setText("append text"); } virtual void undo() { m_document->chop(m_text.length()); } virtual void redo() { m_document->append(m_text); } private: QString *m_document; QString m_text; }; //! [0] //! [1] MyCommand *command1 = new MyCommand(); stack->push(command1); MyCommand *command2 = new MyCommand(); stack->push(command2); stack->undo(); MyCommand *command3 = new MyCommand(); stack->push(command3); // command2 gets deleted //! [1] //! [2] QUndoCommand *insertRed = new QUndoCommand(); // an empty command insertRed->setText("insert red text"); new InsertText(document, idx, text, insertRed); // becomes child of insertRed new SetColor(document, idx, text.length(), Qt::red, insertRed); stack.push(insertRed); //! [2] //! [3] bool AppendText::mergeWith(const QUndoCommand *other) { if (other->id() != id()) // make sure other is also an AppendText command return false; m_text += static_cast<const AppendText*>(other)->m_text; return true; } //! [3] //! [4] stack.beginMacro("insert red text"); stack.push(new InsertText(document, idx, text)); stack.push(new SetColor(document, idx, text.length(), Qt::red)); stack.endMacro(); // indexChanged() is emitted //! [4] //! [5] QUndoCommand *insertRed = new QUndoCommand(); // an empty command insertRed->setText("insert red text"); new InsertText(document, idx, text, insertRed); // becomes child of insertRed new SetColor(document, idx, text.length(), Qt::red, insertRed); stack.push(insertRed); //! [5]


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