diff options
Diffstat (limited to 'src/widgets/doc/snippets/code/src_gui_util_qundostack.cpp')
| -rw-r--r-- | src/widgets/doc/snippets/code/src_gui_util_qundostack.cpp | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/src/widgets/doc/snippets/code/src_gui_util_qundostack.cpp b/src/widgets/doc/snippets/code/src_gui_util_qundostack.cpp deleted file mode 100644 index 8f59fe9cb3..0000000000 --- a/src/widgets/doc/snippets/code/src_gui_util_qundostack.cpp +++ /dev/null @@ -1,119 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 The Qt Company Ltd 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"); } - void undo() override - { m_document->chop(m_text.length()); } - void redo() override - { 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] |