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Diffstat (limited to 'examples/widgets/tools/undo/commands.cpp')
-rw-r--r-- | examples/widgets/tools/undo/commands.cpp | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/examples/widgets/tools/undo/commands.cpp b/examples/widgets/tools/undo/commands.cpp new file mode 100644 index 0000000000..ee299bc3af --- /dev/null +++ b/examples/widgets/tools/undo/commands.cpp @@ -0,0 +1,180 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "commands.h" + +static const int setShapeRectCommandId = 1; +static const int setShapeColorCommandId = 2; + +/****************************************************************************** +** AddShapeCommand +*/ + +AddShapeCommand::AddShapeCommand(Document *doc, const Shape &shape, QUndoCommand *parent) + : QUndoCommand(parent) +{ + m_doc = doc; + m_shape = shape; +} + +void AddShapeCommand::undo() +{ + m_doc->deleteShape(m_shapeName); +} + +void AddShapeCommand::redo() +{ + // A shape only gets a name when it is inserted into a document + m_shapeName = m_doc->addShape(m_shape); + setText(QObject::tr("Add %1").arg(m_shapeName)); +} + +/****************************************************************************** +** RemoveShapeCommand +*/ + +RemoveShapeCommand::RemoveShapeCommand(Document *doc, const QString &shapeName, + QUndoCommand *parent) + : QUndoCommand(parent) +{ + setText(QObject::tr("Remove %1").arg(shapeName)); + m_doc = doc; + m_shape = doc->shape(shapeName); + m_shapeName = shapeName; +} + +void RemoveShapeCommand::undo() +{ + m_shapeName = m_doc->addShape(m_shape); +} + +void RemoveShapeCommand::redo() +{ + m_doc->deleteShape(m_shapeName); +} + +/****************************************************************************** +** SetShapeColorCommand +*/ + +SetShapeColorCommand::SetShapeColorCommand(Document *doc, const QString &shapeName, + const QColor &color, QUndoCommand *parent) + : QUndoCommand(parent) +{ + setText(QObject::tr("Set %1's color").arg(shapeName)); + + m_doc = doc; + m_shapeName = shapeName; + m_oldColor = doc->shape(shapeName).color(); + m_newColor = color; +} + +void SetShapeColorCommand::undo() +{ + m_doc->setShapeColor(m_shapeName, m_oldColor); +} + +void SetShapeColorCommand::redo() +{ + m_doc->setShapeColor(m_shapeName, m_newColor); +} + +bool SetShapeColorCommand::mergeWith(const QUndoCommand *command) +{ + if (command->id() != setShapeColorCommandId) + return false; + + const SetShapeColorCommand *other = static_cast<const SetShapeColorCommand*>(command); + if (m_shapeName != other->m_shapeName) + return false; + + m_newColor = other->m_newColor; + return true; +} + +int SetShapeColorCommand::id() const +{ + return setShapeColorCommandId; +} + +/****************************************************************************** +** SetShapeRectCommand +*/ + +SetShapeRectCommand::SetShapeRectCommand(Document *doc, const QString &shapeName, + const QRect &rect, QUndoCommand *parent) + : QUndoCommand(parent) +{ + setText(QObject::tr("Change %1's geometry").arg(shapeName)); + + m_doc = doc; + m_shapeName = shapeName; + m_oldRect = doc->shape(shapeName).rect(); + m_newRect = rect; +} + +void SetShapeRectCommand::undo() +{ + m_doc->setShapeRect(m_shapeName, m_oldRect); +} + +void SetShapeRectCommand::redo() +{ + m_doc->setShapeRect(m_shapeName, m_newRect); +} + +bool SetShapeRectCommand::mergeWith(const QUndoCommand *command) +{ + if (command->id() != setShapeRectCommandId) + return false; + + const SetShapeRectCommand *other = static_cast<const SetShapeRectCommand*>(command); + if (m_shapeName != other->m_shapeName) + return false; + + m_newRect = other->m_newRect; + return true; +} + +int SetShapeRectCommand::id() const +{ + return setShapeRectCommandId; +} |