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# popupwidget.cpp Example File
demos/spreadsheet/popupwidget.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the demonstration applications of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        **
        ****************************************************************************/

        #include "popupwidget.h"

        #include <QtGui>

        PopupWidget::PopupWidget(QWidget *parent)
            :QWidget(parent, Qt::Popup), childWidget(0),
            eventLoop(0), returnCode(QDialog::Rejected)
        {
        }

        PopupWidget::~PopupWidget()
        {
             if(eventLoop)
                delete eventLoop;
        }

        void PopupWidget::setWidget(QWidget * widget)
        {
            childWidget = widget;
            QVBoxLayout *widgetLayout = new QVBoxLayout(this);
            widgetLayout->setMargin(0);
            widgetLayout->addWidget(childWidget);
        }

        QWidget* PopupWidget::widget() const
        {
            return childWidget;
        }

        int PopupWidget::exec(const QRect& rect)
        {
            returnCode = QDialog::Rejected;
            move(rect.bottomLeft());
            show();
            if(!eventLoop)
                eventLoop = new QEventLoop;
            eventLoop->exec();
            return returnCode;
        }

        void PopupWidget::closePopup()
        {
            returnCode = QDialog::Accepted;
            hide();
            if(eventLoop)
                eventLoop->exit();
        }

        void PopupWidget::hideEvent(QHideEvent *)
        {
            if(eventLoop)
                eventLoop->exit();
        }