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diff --git a/indra/newview/llpanelvolumepulldown.cpp b/indra/newview/llpanelvolumepulldown.cpp
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+++ b/indra/newview/llpanelvolumepulldown.cpp
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+/** 
+ * @file llpanelvolumepulldown.cpp
+ * @author Tofu Linden
+ * @brief A floater showing the master volume pull-down
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ * 
+ * Copyright (c) 2008-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llpanelvolumepulldown.h"
+
+// Viewer libs
+#include "llviewercontrol.h"
+#include "llstatusbar.h"
+
+// Linden libs
+#include "llbutton.h"
+#include "lltabcontainer.h"
+#include "llfloaterreg.h"
+#include "llfloaterpreference.h"
+#include "llslider.h"
+
+/* static */ const F32 LLPanelVolumePulldown::sAutoCloseFadeStartTimeSec = 4.0f;
+/* static */ const F32 LLPanelVolumePulldown::sAutoCloseTotalTimeSec = 5.0f;
+
+///----------------------------------------------------------------------------
+/// Class LLPanelVolumePulldown
+///----------------------------------------------------------------------------
+
+// Default constructor
+LLPanelVolumePulldown::LLPanelVolumePulldown()
+{
+    mCommitCallbackRegistrar.add("Vol.setControlFalse", boost::bind(&LLPanelVolumePulldown::setControlFalse, this, _2));
+	mCommitCallbackRegistrar.add("Vol.GoAudioPrefs", boost::bind(&LLPanelVolumePulldown::onAdvancedButtonClick, this, _2));
+	LLUICtrlFactory::instance().buildPanel(this, "panel_volume_pulldown.xml");
+}
+
+BOOL LLPanelVolumePulldown::postBuild()
+{
+	// set the initial volume-slider's position to reflect reality
+	LLSlider* volslider =  getChild<LLSlider>( "mastervolume" );
+	volslider->setValue(gSavedSettings.getF32("AudioLevelMaster"));
+
+	return LLPanel::postBuild();
+}
+
+/*virtual*/
+void LLPanelVolumePulldown::onMouseEnter(S32 x, S32 y, MASK mask)
+{
+	mHoverTimer.stop();
+	LLPanel::onMouseEnter(x,y,mask);
+}
+
+
+/*virtual*/
+void LLPanelVolumePulldown::onMouseLeave(S32 x, S32 y, MASK mask)
+{
+	mHoverTimer.start();
+	LLPanel::onMouseLeave(x,y,mask);
+}
+
+/*virtual*/ 
+void LLPanelVolumePulldown::handleVisibilityChange ( BOOL new_visibility )
+{
+	if (new_visibility)	
+	{
+		mHoverTimer.start(); // timer will be stopped when mouse hovers over panel
+		gFocusMgr.setTopCtrl(this);
+	}
+	else
+	{
+		mHoverTimer.stop();
+		gFocusMgr.setTopCtrl(NULL);
+	}
+}
+
+/*virtual*/ 
+void LLPanelVolumePulldown::onTopLost()
+{
+	setVisible(FALSE);
+}
+
+void LLPanelVolumePulldown::onAdvancedButtonClick(const LLSD& user_data)
+{
+	// close the global volume minicontrol, we're bringing up the big one
+	setVisible(FALSE);
+
+	// bring up the prefs floater
+	LLFloaterPreference* prefsfloater = dynamic_cast<LLFloaterPreference*>
+		(LLFloaterReg::showInstance("preferences"));
+	if (prefsfloater)
+	{
+		// grab the 'audio' panel from the preferences floater and
+		// bring it the front!
+		LLTabContainer* tabcontainer = prefsfloater->getChild<LLTabContainer>("pref core");
+		LLPanel* audiopanel = prefsfloater->getChild<LLPanel>("audio");
+		if (tabcontainer && audiopanel)
+		{
+			tabcontainer->selectTabPanel(audiopanel);
+		}
+	}
+}
+
+void LLPanelVolumePulldown::setControlFalse(const LLSD& user_data)
+{
+	std::string control_name = user_data.asString();
+	LLControlVariable* control = findControl(control_name);
+	
+	if (control)
+		control->set(LLSD(FALSE));
+}
+
+//virtual
+void LLPanelVolumePulldown::draw()
+{
+	F32 alpha = mHoverTimer.getStarted() 
+		? clamp_rescale(mHoverTimer.getElapsedTimeF32(), sAutoCloseFadeStartTimeSec, sAutoCloseTotalTimeSec, 1.f, 0.f)
+		: 1.0f;
+	LLViewDrawContext context(alpha);
+
+	LLPanel::draw();
+
+	if (alpha == 0.f)
+	{
+		setVisible(FALSE);
+	}
+}
+