Qt Reference Documentation

# objects.cpp Example File

activeqt/hierarchy/objects.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
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     ** This file is part of the examples of the Qt Toolkit.
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     ** $QT_BEGIN_LICENSE:BSD$
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     **
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     #include "objects.h"
     #include <QLayout>
     #include <QPainter>

     /* Implementation of QParentWidget */
     QParentWidget::QParentWidget(QWidget *parent)
     : QWidget(parent)
     {
         vbox = new QVBoxLayout(this);
     }

     void QParentWidget::createSubWidget(const QString &name)
     {
         QSubWidget *sw = new QSubWidget(this, name);
         vbox->addWidget(sw);
         sw->setLabel(name);
         sw->show();
     }

     QSubWidget *QParentWidget::subWidget(const QString &name)
     {
         return qFindChild<QSubWidget*>(this, name);
     }

     QSize QParentWidget::sizeHint() const
     {
         return QWidget::sizeHint().expandedTo(QSize(100, 100));
     }

     /* Implementation of QSubWidget */
     QSubWidget::QSubWidget(QWidget *parent, const QString &name)
     : QWidget(parent)
     {
         setObjectName(name);
     }

     void QSubWidget::setLabel(const QString &text)
     {
         lbl = text;
         setObjectName(text);
         update();
     }

     QString QSubWidget::label() const
     {
         return lbl;
     }

     QSize QSubWidget::sizeHint() const
     {
         QFontMetrics fm(font());
         return QSize(fm.width(lbl), fm.height());
     }

     void QSubWidget::paintEvent(QPaintEvent *)
     {
         QPainter painter(this);
         painter.setPen(palette().text().color());
         painter.drawText(rect(), Qt::AlignCenter, lbl);
     }