MoveCommand.cpp Example File

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    #include "MoveCommand.hpp"

    #include <bb/cascades/AbsoluteLayoutProperties>

    using namespace bb::cascades;

    MoveCommand::MoveCommand(Control *control, const QPoint &source, const QPoint &target, QUndoCommand *parent)
        : QUndoCommand(parent)
        , m_control(control)
        , m_sourcePoint(source)
        , m_targetPoint(target)
    {
        // Extract the title property that has been set on the Stone control in the QML file
        const QString title = m_control->property("title").toString();

        /**
         * Set a meaningful text for this command. This text will be used by QUndoStack::undoText() and QUndoStack::redoText()
         * when this command is on the top of the stack.
         */
        setText(QString("Move %1").arg(title));
    }

    void MoveCommand::redo()
    {
        /**
         * This method is called when the user triggers the redo of a command.
         * We simply retrieve the AbsoluteLayoutProperties object of our Stone control and
         * set it to the target position.
         */
        AbsoluteLayoutProperties *properties = qobject_cast<AbsoluteLayoutProperties*>(m_control->layoutProperties());
        if (properties) {
            properties->setPositionX(m_targetPoint.x());
            properties->setPositionY(m_targetPoint.y());
        }
    }

    void MoveCommand::undo()
    {
        /**
         * This method is called when the user triggers the undo of a command.
         * We simply retrieve the AbsoluteLayoutProperties object of our Stone control and
         * set it back to its source position.
         */
        AbsoluteLayoutProperties *properties = qobject_cast<AbsoluteLayoutProperties*>(m_control->layoutProperties());
        if (properties) {
            properties->setPositionX(m_sourcePoint.x());
            properties->setPositionY(m_sourcePoint.y());
        }
    }