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diff --git a/installerbuilder/libinstaller/lazyplaintextedit.h b/installerbuilder/libinstaller/lazyplaintextedit.h
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+/**************************************************************************
+**
+** This file is part of Qt SDK**
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).*
+**
+** Contact:  Nokia Corporation qt-info@nokia.com**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception version
+** 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you are unsure which license is appropriate for your use, please contact
+** (qt-info@nokia.com).
+**
+**************************************************************************/
+#ifndef LAZYPLAINTEXTEDIT_H
+#define LAZYPLAINTEXTEDIT_H
+
+#include <QPlainTextEdit>
+
+class LazyPlainTextEdit : public QPlainTextEdit
+{
+    Q_OBJECT
+public:
+    explicit LazyPlainTextEdit(QWidget *parent = 0);
+
+public slots:
+    void append(const QString &text);
+    virtual void clear();
+    virtual void setVisible ( bool visible );
+protected:
+    void timerEvent(QTimerEvent *event);
+private:
+    QString m_chachedOutput;
+    int m_timerId;
+};
+
+#endif // LAZYPLAINTEXTEDIT_H