commands.cpp Example File | Qt 4.8 (original) (raw)

demos/undo/commands.cpp

#include "commands.h"

static const int setShapeRectCommandId = 1; static const int setShapeColorCommandId = 2;

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() {

m_shapeName = m_doc->addShape(m_shape);
setText([QObject](qobject.html)::tr("Add %1").arg(m_shapeName));

}

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(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(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; }

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.