1 files changed, 85 insertions, 0 deletions
diff --git a/src/libs/installer/lazyplaintextedit.cpp b/src/libs/installer/lazyplaintextedit.cpp
new file mode 100644
index 000000000..b9b868775
--- /dev/null
+++ b/src/libs/installer/lazyplaintextedit.cpp
@@ -0,0 +1,85 @@
+/**************************************************************************
+**
+** This file is part of Installer Framework
+**
+** Copyright (c) 2011-2012 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.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**************************************************************************/
+
+#include "lazyplaintextedit.h"
+
+#include <QScrollBar>
+
+const int INTERVAL = 20;
+
+LazyPlainTextEdit::LazyPlainTextEdit(QWidget *parent) :
+    QPlainTextEdit(parent), m_timerId(0)
+{
+}
+
+void LazyPlainTextEdit::timerEvent(QTimerEvent *event)
+{
+    if (event->timerId() == m_timerId) {
+        killTimer(m_timerId);
+        m_timerId = 0;
+        m_chachedOutput.chop(1); //removes the last \n
+        if (!m_chachedOutput.isEmpty())
+            appendPlainText(m_chachedOutput);
+        horizontalScrollBar()->setValue( 0 );
+        m_chachedOutput.clear();
+    }
+}
+
+void LazyPlainTextEdit::append(const QString &text)
+{
+    m_chachedOutput.append(text + QLatin1String("\n"));
+    if (isVisible() && m_timerId == 0)
+        m_timerId = startTimer(INTERVAL);
+}
+
+void LazyPlainTextEdit::clear()
+{
+    if (m_timerId) {
+        killTimer(m_timerId);
+        m_timerId = 0;
+        m_chachedOutput.clear();
+    }
+    QPlainTextEdit::clear();
+}
+
+
+void LazyPlainTextEdit::setVisible(bool visible)
+{
+    if (m_timerId) {
+        killTimer(m_timerId);
+        m_timerId = 0;
+    }
+    if (visible) {
+        m_timerId = startTimer(INTERVAL);
+    }
+    QPlainTextEdit::setVisible(visible);
+}