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diff --git a/indra/llui/llloadingindicator.cpp b/indra/llui/llloadingindicator.cpp
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+++ b/indra/llui/llloadingindicator.cpp
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+/** 
+ * @file llloadingindicator.cpp
+ * @brief Perpetual loading indicator
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llloadingindicator.h"
+
+// Linden library includes
+#include "llsingleton.h"
+
+// Project includes
+#include "lluictrlfactory.h"
+#include "lluiimage.h"
+
+// registered in llui.cpp to avoid being left out by MS linker
+//static LLDefaultChildRegistry::Register<LLLoadingIndicator> r("loading_indicator");
+
+///////////////////////////////////////////////////////////////////////////////
+// LLLoadingIndicator::Data class
+///////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Pre-loaded images shared by all instances of the widget
+ */
+class LLLoadingIndicator::Data: public LLSingleton<LLLoadingIndicator::Data>
+{
+public:
+	/*virtual*/ void		initSingleton(); // from LLSingleton
+
+	LLPointer<LLUIImage>	getNextImage(S8& idx) const;
+	U8						getImagesCount() const	{ return NIMAGES; }
+private:
+
+	static const U8			NIMAGES = 12;
+	LLPointer<LLUIImage>	mImages[NIMAGES];
+};
+
+// virtual
+// Called right after the instance gets constructed.
+void LLLoadingIndicator::Data::initSingleton()
+{
+	// Load images.
+	for (U8 i = 0; i < NIMAGES; ++i)
+	{
+		std::string img_name = llformat("Progress_%d", i+1);
+		mImages[i] = LLUI::getUIImage(img_name, 0);
+		llassert(mImages[i]);
+	}
+}
+
+LLPointer<LLUIImage> LLLoadingIndicator::Data::getNextImage(S8& idx) const
+{
+	// Calculate next index, performing array bounds checking.
+	idx = (idx >= NIMAGES || idx < 0) ? 0 : (idx + 1) % NIMAGES; 
+	return mImages[idx];
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// LLLoadingIndicator class
+///////////////////////////////////////////////////////////////////////////////
+
+LLLoadingIndicator::LLLoadingIndicator(const Params& p)
+:	LLUICtrl(p)
+	, mRotationsPerSec(p.rotations_per_sec > 0 ? p.rotations_per_sec : 1.0f)
+	, mCurImageIdx(-1)
+{
+	// Select initial image.
+	mCurImagep = Data::instance().getNextImage(mCurImageIdx);
+
+	// Start timer for switching images.
+	start();
+}
+
+void LLLoadingIndicator::draw()
+{
+	// Time to switch to the next image?
+	if (mImageSwitchTimer.getStarted() && mImageSwitchTimer.hasExpired())
+	{
+		// Switch to the next image.
+		mCurImagep = Data::instance().getNextImage(mCurImageIdx);
+
+		// Restart timer.
+		start();
+	}
+
+	// Draw current image.
+	if( mCurImagep.notNull() )
+	{
+		mCurImagep->draw(getLocalRect(), LLColor4::white % getDrawContext().mAlpha);
+	}
+
+	LLUICtrl::draw();
+}
+
+void LLLoadingIndicator::stop()
+{
+	mImageSwitchTimer.stop();
+}
+
+void LLLoadingIndicator::start()
+{
+	mImageSwitchTimer.start();
+	F32 period = 1.0f / (Data::instance().getImagesCount() * mRotationsPerSec);
+	mImageSwitchTimer.setTimerExpirySec(period);
+}