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# multipagewidgetextensionfactory.cpp Example File
designer/containerextension/multipagewidgetextensionfactory.cpp

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        #include "multipagewidgetextensionfactory.h"
        #include "multipagewidgetcontainerextension.h"
        #include "multipagewidget.h"

        MultiPageWidgetExtensionFactory::MultiPageWidgetExtensionFactory(QExtensionManager *parent)
            : QExtensionFactory(parent)
        {}

        QObject *MultiPageWidgetExtensionFactory::createExtension(QObject *object,
                                                                  const QString &iid,
                                                                  QObject *parent) const
        {
            MultiPageWidget *widget = qobject_cast<MultiPageWidget*>(object);

            if (widget && (iid == Q_TYPEID(QDesignerContainerExtension))) {
                return new MultiPageWidgetContainerExtension(widget, parent);
            } else {
                return 0;
            }
        }