source: tests/modal/modal.cpp@ 937

#include <QDebug>
#include <QtGui>

class MyMainWidget : public QWidget
{
    Q_OBJECT

public:

    MyMainWidget() : mTestNo (0), mCurWidget (0)
    {
        mTestNo = 4;

        setWindowTitle ("Primary");

        mPB = new QPushButton ("Next Test", this);
        connect (mPB, SIGNAL (clicked()), this, SLOT (nextTest()));

        QVBoxLayout *layout = new QVBoxLayout();
        layout->addWidget (mPB);
        setLayout (layout);
    }

    virtual ~MyMainWidget()
    {
        delete mCurWidget;
    }

    void test (QWidget *w, const QString &text)
    {
        w->setWindowTitle ("Secondary");

        QString newText = QString (
                    "%1\n\n"
                    "parentWidget() is %2\n"
                    "className() is %3\n"
                    "isWindow() is %4\n"
                    "windowFlags() is 0x%5\n"
                    "windowModality() is %6")
                .arg (text)
                .arg (w->parentWidget() ? w->parentWidget()->metaObject()
                                          ->className()
                                       : "<none>")
                .arg (w->metaObject()->className())
                .arg (w->isWindow())
                .arg (w->windowFlags(), 8, 16, QLatin1Char ('0'))
                .arg (w->windowModality());

        if (w->inherits ("QMessageBox"))
        {
            static_cast <QMessageBox *> (w)->setText (newText);
        }
        else
        {
            QLabel *label = new QLabel (w);
            label->setText (newText);

            QVBoxLayout *layout = new QVBoxLayout();
            layout->addWidget (label);
            w->setLayout (layout);
        }

        w->show();

        if (mCurWidget)
        {
            mCurWidget->close();
            delete mCurWidget;
        }

        mCurWidget = w;
    }

public slots:

    void nextTest()
    {
        switch (mTestNo)
        {
        case 0:
        {
            QWidget *w = new QWidget();
            test (w,
                  "QWidget().\n"
                  "Should have a taskbar entry.\n"
                  "Should not be always on top of parent.\n"
                  "Should not block parent.");
            break;
        }
        case 1:
        {
            QWidget *w = new QWidget (this, Qt::Window);
            test (w,
                  "QWidget (this, Qt::Window).\n"
                  "Should not have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should not block parent.");
            break;
        }
        case 2:
        {
            QWidget *w = new QDialog();
            test (w,
                  "QDialog().\n"
                  "Should have a taskbar entry.\n"
                  "Should not be always on top of parent.\n"
                  "Should not block parent.");
            break;
        }
        case 3:
        {
            QWidget *w = new QDialog (this);
            test (w,
                  "QDialog(this).\n"
                  "Should not have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should not block parent.");
            break;
        }
        case 4:
        {
            QWidget *w = new QMessageBox();
            test (w,
                  "QMessageBox().\n"
                  "Should have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should block parent.");
            break;
        }
        case 5:
        {
            QWidget *w = new QMessageBox (this);
            test (w,
                  "QMessageBox (this).\n"
                  "Should not have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should block parent.");
            break;
        }
        case 6:
        {
            QWidget *w = new QWidget();
            w->setWindowModality (Qt::WindowModal);
            test (w,
                  "QWidget() - WindowModal.\n"
                  "Should have a taskbar entry.\n"
                  "Should not be always on top of parent.\n"
                  "Should not block parent.");
            break;
        }
        case 7:
        {
            QWidget *w = new QWidget (this, Qt::Window);
            w->setWindowModality (Qt::WindowModal);
            test (w,
                  "QWidget (this, Qt::Window) - WindowModal.\n"
                  "Should not have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should block parent.");
            break;
        }
        case 8:
        {
            QWidget *w = new QWidget(0, Qt::Dialog);
            w->setWindowModality (Qt::ApplicationModal);
            test (w,
                  "QWidget() - ApplicationModal.\n"
                  "Should have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should block parent.");
            break;
        }
        case 9:
        {
            QWidget *w = new QWidget (this, Qt::Window);
            w->setWindowModality (Qt::ApplicationModal);
            test (w,
                  "QWidget (this, Qt::Window) - ApplicationModal.\n"
                  "Should not have a taskbar entry.\n"
                  "Should be always on top of parent.\n"
                  "Should block parent.");
            break;
        }
        default:
            mPB->setText ("No More Tests");
            mPB->setEnabled (false);
            return;
        }

        ++ mTestNo;
    }

private:

    int mTestNo;
    QPushButton *mPB;
    QWidget *mCurWidget;
};

int main (int argc, char **argv)
{
    QApplication app (argc, argv);
    app.setQuitOnLastWindowClosed (true);

    MyMainWidget mainWidget;
    mainWidget.resize (100, 100);
    mainWidget.show();

    return app.exec();
}

#include "modal.moc"