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

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    ** 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.
    **
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    ** information about Qt Commercial License Agreements.
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    ** not clear to you.
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
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    #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();
    }


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Qt 4.2.0-tp1