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diff --git a/linden/indra/llui/llmultislider.cpp b/linden/indra/llui/llmultislider.cpp
new file mode 100644
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+++ b/linden/indra/llui/llmultislider.cpp
@@ -0,0 +1,677 @@
+/** 
+ * @file llmultisldr.cpp
+ * @brief LLMultiSlider base class
+ *
+ * $LicenseInfo:firstyear=2007&license=viewergpl$
+ * 
+ * Copyright (c) 2007-2008, 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 "linden_common.h"
+
+#include "llmultislider.h"
+#include "llui.h"
+
+#include "llgl.h"
+#include "llwindow.h"
+#include "llfocusmgr.h"
+#include "llkeyboard.h"                 // for the MASK constants
+#include "llcontrol.h"
+#include "llimagegl.h"
+
+#include <sstream>
+
+const S32 MULTI_THUMB_WIDTH = 8;
+const S32 MULTI_TRACK_HEIGHT = 6;
+const F32 FLOAT_THRESHOLD = 0.00001f;
+const S32 EXTRA_TRIANGLE_WIDTH = 2;
+const S32 EXTRA_TRIANGLE_HEIGHT = -2;
+
+S32 LLMultiSlider::mNameCounter = 0;
+
+LLMultiSlider::LLMultiSlider( 
+        const LLString& name,
+        const LLRect& rect,
+        void (*on_commit_callback)(LLUICtrl* ctrl, void* userdata),
+        void* callback_userdata,
+        F32 initial_value,
+        F32 min_value,
+        F32 max_value,
+        F32 increment,
+        S32 max_sliders,
+        BOOL allow_overlap,
+        BOOL draw_track,
+        BOOL use_triangle,
+        const LLString& control_name)
+        :
+        LLUICtrl( name, rect, TRUE,     on_commit_callback, callback_userdata, 
+                FOLLOWS_LEFT | FOLLOWS_TOP),
+
+        mInitialValue( initial_value ),
+        mMinValue( min_value ),
+        mMaxValue( max_value ),
+        mIncrement( increment ),
+        mMaxNumSliders(max_sliders),
+        mAllowOverlap(allow_overlap),
+        mDrawTrack(draw_track),
+        mUseTriangle(use_triangle),
+        mMouseOffset( 0 ),
+        mDragStartThumbRect( 0, getRect().getHeight(), MULTI_THUMB_WIDTH, 0 ),
+        mTrackColor(            LLUI::sColorsGroup->getColor( "MultiSliderTrackColor" ) ),
+        mThumbOutlineColor(     LLUI::sColorsGroup->getColor( "MultiSliderThumbOutlineColor" ) ),
+        mThumbCenterColor(      LLUI::sColorsGroup->getColor( "MultiSliderThumbCenterColor" ) ),
+        mThumbCenterSelectedColor(      LLUI::sColorsGroup->getColor( "MultiSliderThumbCenterSelectedColor" ) ),
+        mDisabledThumbColor(LLUI::sColorsGroup->getColor( "MultiSliderDisabledThumbColor" ) ),
+        mTriangleColor(LLUI::sColorsGroup->getColor( "MultiSliderTriangleColor" ) ),
+        mMouseDownCallback( NULL ),
+        mMouseUpCallback( NULL )
+{
+        mValue.emptyMap();
+        mCurSlider = LLString::null;
+
+        // properly handle setting the starting thumb rect
+        // do it this way to handle both the operating-on-settings
+        // and standalone ways of using this
+        setControlName(control_name, NULL);
+        setValue(getValue());
+}
+
+EWidgetType LLMultiSlider::getWidgetType() const
+{
+        return WIDGET_TYPE_MULTI_SLIDER_BAR;
+}
+
+LLString LLMultiSlider::getWidgetTag() const
+{
+        return LL_MULTI_SLIDER_TAG;
+}
+
+void LLMultiSlider::setSliderValue(const LLString& name, F32 value, BOOL from_event)
+{
+        // exit if not there
+        if(!mValue.has(name)) {
+                return;
+        }
+
+        value = llclamp( value, mMinValue, mMaxValue );
+
+        // Round to nearest increment (bias towards rounding down)
+        value -= mMinValue;
+        value += mIncrement/2.0001f;
+        value -= fmod(value, mIncrement);
+        F32 newValue = mMinValue + value;
+
+        // now, make sure no overlap
+        // if we want that
+        if(!mAllowOverlap) {
+                bool hit = false;
+
+                // look at the current spot
+                // and see if anything is there
+                LLSD::map_iterator mIt = mValue.beginMap();
+                for(;mIt != mValue.endMap(); mIt++) {
+                        
+                        F32 testVal = (F32)mIt->second.asReal() - newValue;
+                        if(testVal > -FLOAT_THRESHOLD && testVal < FLOAT_THRESHOLD &&
+                                mIt->first != name) {
+                                hit = true;
+                                break;
+                        }
+                }
+
+                // if none found, stop
+                if(hit) {
+                        return;
+                }
+        }
+        
+
+        // now set it in the map
+        mValue[name] = newValue;
+
+        // set the control if it's the current slider and not from an event
+        if (!from_event && name == mCurSlider)
+        {
+                setControlValue(mValue);
+        }
+        
+        F32 t = (newValue - mMinValue) / (mMaxValue - mMinValue);
+
+        S32 left_edge = MULTI_THUMB_WIDTH/2;
+        S32 right_edge = getRect().getWidth() - (MULTI_THUMB_WIDTH/2);
+
+        S32 x = left_edge + S32( t * (right_edge - left_edge) );
+        mThumbRects[name].mLeft = x - (MULTI_THUMB_WIDTH/2);
+        mThumbRects[name].mRight = x + (MULTI_THUMB_WIDTH/2);
+}
+
+void LLMultiSlider::setValue(const LLSD& value)
+{
+        // only do if it's a map
+        if(value.isMap()) {
+                
+                // add each value... the first in the map becomes the current
+                LLSD::map_const_iterator mIt = value.beginMap();
+                mCurSlider = mIt->first;
+
+                for(; mIt != value.endMap(); mIt++) {
+                        setSliderValue(mIt->first, (F32)mIt->second.asReal(), TRUE);
+                }
+        }
+}
+
+F32 LLMultiSlider::getSliderValue(const LLString& name) const
+{
+        return (F32)mValue[name].asReal();
+}
+
+void LLMultiSlider::setCurSlider(const LLString& name)
+{
+        if(mValue.has(name)) {
+                mCurSlider = name;
+        }
+}
+
+const LLString& LLMultiSlider::addSlider()
+{
+        return addSlider(mInitialValue);
+}
+
+const LLString& LLMultiSlider::addSlider(F32 val)
+{
+        std::stringstream newName;
+        F32 initVal = val;
+
+        if(mValue.size() >= mMaxNumSliders) {
+                return LLString::null;
+        }
+
+        // create a new name
+        newName << "sldr" << mNameCounter;
+        mNameCounter++;
+
+        bool foundOne = findUnusedValue(initVal);
+        if(!foundOne) {
+                return LLString::null;
+        }
+
+        // add a new thumb rect
+        mThumbRects[newName.str()] = LLRect( 0, getRect().getHeight(), MULTI_THUMB_WIDTH, 0 );
+
+        // add the value and set the current slider to this one
+        mValue.insert(newName.str(), initVal);
+        mCurSlider = newName.str();
+
+        // move the slider
+        setSliderValue(mCurSlider, initVal, TRUE);
+
+        return mCurSlider;
+}
+
+bool LLMultiSlider::findUnusedValue(F32& initVal)
+{
+        bool firstTry = true;
+
+        // find the first open slot starting with
+        // the initial value
+        while(true) {
+                
+                bool hit = false;
+
+                // look at the current spot
+                // and see if anything is there
+                LLSD::map_iterator mIt = mValue.beginMap();
+                for(;mIt != mValue.endMap(); mIt++) {
+                        
+                        F32 testVal = (F32)mIt->second.asReal() - initVal;
+                        if(testVal > -FLOAT_THRESHOLD && testVal < FLOAT_THRESHOLD) {
+                                hit = true;
+                                break;
+                        }
+                }
+
+                // if we found one
+                if(!hit) {
+                        break;
+                }
+
+                // increment and wrap if need be
+                initVal += mIncrement;
+                if(initVal > mMaxValue) {
+                        initVal = mMinValue;
+                }
+
+                // stop if it's filled
+                if(initVal == mInitialValue && !firstTry) {
+                        llwarns << "Whoa! Too many multi slider elements to add one to" << llendl;
+                        return false;
+                }
+
+                firstTry = false;
+                continue;
+        }
+
+        return true;
+}
+
+
+void LLMultiSlider::deleteSlider(const LLString& name)
+{
+        // can't delete last slider
+        if(mValue.size() <= 0) {
+                return;
+        }
+
+        // get rid of value from mValue and its thumb rect
+        mValue.erase(name);
+        mThumbRects.erase(name);
+
+        // set to the last created
+        if(mValue.size() > 0) {
+                std::map<LLString, LLRect>::iterator mIt = mThumbRects.end();
+                mIt--;
+                mCurSlider = mIt->first;
+        }
+}
+
+void LLMultiSlider::clear()
+{
+        while(mThumbRects.size() > 0) {
+                deleteCurSlider();
+        }
+
+        LLUICtrl::clear();
+}
+
+BOOL LLMultiSlider::handleHover(S32 x, S32 y, MASK mask)
+{
+        if( gFocusMgr.getMouseCapture() == this )
+        {
+                S32 left_edge = MULTI_THUMB_WIDTH/2;
+                S32 right_edge = getRect().getWidth() - (MULTI_THUMB_WIDTH/2);
+
+                x += mMouseOffset;
+                x = llclamp( x, left_edge, right_edge );
+
+                F32 t = F32(x - left_edge) / (right_edge - left_edge);
+                setCurSliderValue(t * (mMaxValue - mMinValue) + mMinValue );
+                onCommit();
+
+                getWindow()->setCursor(UI_CURSOR_ARROW);
+                lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (active)" << llendl;               
+        }
+        else
+        {
+                getWindow()->setCursor(UI_CURSOR_ARROW);
+                lldebugst(LLERR_USER_INPUT) << "hover handled by " << getName() << " (inactive)" << llendl;             
+        }
+        return TRUE;
+}
+
+BOOL LLMultiSlider::handleMouseUp(S32 x, S32 y, MASK mask)
+{
+        BOOL handled = FALSE;
+
+        if( gFocusMgr.getMouseCapture() == this )
+        {
+                gFocusMgr.setMouseCapture( NULL );
+
+                if( mMouseUpCallback )
+                {
+                        mMouseUpCallback( this, mCallbackUserData );
+                }
+                handled = TRUE;
+                make_ui_sound("UISndClickRelease");
+        }
+        else
+        {
+                handled = TRUE;
+        }
+
+        return handled;
+}
+
+BOOL LLMultiSlider::handleMouseDown(S32 x, S32 y, MASK mask)
+{
+        // only do sticky-focus on non-chrome widgets
+        if (!getIsChrome())
+        {
+                setFocus(TRUE);
+        }
+        if( mMouseDownCallback )
+        {
+                mMouseDownCallback( this, mCallbackUserData );
+        }
+
+        if (MASK_CONTROL & mask) // if CTRL is modifying
+        {
+                setCurSliderValue(mInitialValue);
+                onCommit();
+        }
+        else
+        {
+                // scroll through thumbs to see if we have a new one selected and select that one
+                std::map<LLString, LLRect>::iterator mIt = mThumbRects.begin();
+                for(; mIt != mThumbRects.end(); mIt++) {
+                        
+                        // check if inside.  If so, set current slider and continue
+                        if(mIt->second.pointInRect(x,y)) {
+                                mCurSlider = mIt->first;
+                                break;
+                        }
+                }
+
+                // Find the offset of the actual mouse location from the center of the thumb.
+                if (mThumbRects[mCurSlider].pointInRect(x,y))
+                {
+                        mMouseOffset = (mThumbRects[mCurSlider].mLeft + MULTI_THUMB_WIDTH/2) - x;
+                }
+                else
+                {
+                        mMouseOffset = 0;
+                }
+
+                // Start dragging the thumb
+                // No handler needed for focus lost since this class has no state that depends on it.
+                gFocusMgr.setMouseCapture( this );
+                mDragStartThumbRect = mThumbRects[mCurSlider];                          
+        }
+        make_ui_sound("UISndClick");
+
+        return TRUE;
+}
+
+BOOL    LLMultiSlider::handleKeyHere(KEY key, MASK mask, BOOL called_from_parent)
+{
+        BOOL handled = FALSE;
+        if( getVisible() && getEnabled() && !called_from_parent )
+        {
+                switch(key)
+                {
+                case KEY_UP:
+                case KEY_DOWN:
+                        // eat up and down keys to be consistent
+                        handled = TRUE;
+                        break;
+                case KEY_LEFT:
+                        setCurSliderValue(getCurSliderValue() - getIncrement());
+                        onCommit();
+                        handled = TRUE;
+                        break;
+                case KEY_RIGHT:
+                        setCurSliderValue(getCurSliderValue() + getIncrement());
+                        onCommit();
+                        handled = TRUE;
+                        break;
+                default:
+                        break;
+                }
+        }
+        return handled;
+}
+
+void LLMultiSlider::draw()
+{
+        LLColor4 curThumbColor;
+
+        std::map<LLString, LLRect>::iterator mIt;
+        std::map<LLString, LLRect>::iterator curSldrIt;
+        if( getVisible() )
+        {
+                // Draw background and thumb.
+
+                // drawing solids requires texturing be disabled
+                LLGLSNoTexture no_texture;
+
+                LLRect rect(mDragStartThumbRect);
+
+                F32 opacity = getEnabled() ? 1.f : 0.3f;
+
+                // Track
+                LLUUID thumb_image_id;
+                thumb_image_id.set(LLUI::sAssetsGroup->getString("rounded_square.tga"));
+                LLPointer<LLImageGL> thumb_imagep(LLUI::sImageProvider->getUIImageByID(thumb_image_id)->getImage());
+
+                S32 height_offset = (getRect().getHeight() - MULTI_TRACK_HEIGHT) / 2;
+                LLRect track_rect(0, getRect().getHeight() - height_offset, getRect().getWidth(), height_offset );
+
+
+                if(mDrawTrack)
+                {
+                        track_rect.stretch(-1);
+                        gl_draw_scaled_image_with_border(track_rect.mLeft, track_rect.mBottom, 16, 16, track_rect.getWidth(), track_rect.getHeight(),
+                                thumb_imagep, mTrackColor % opacity);
+                }
+
+                // if we're supposed to use a drawn triangle
+                // simple gl call for the triangle
+                if(mUseTriangle) {
+
+                        for(mIt = mThumbRects.begin(); mIt != mThumbRects.end(); mIt++) {
+
+                                gl_triangle_2d(
+                                        mIt->second.mLeft - EXTRA_TRIANGLE_WIDTH, 
+                                        mIt->second.mTop + EXTRA_TRIANGLE_HEIGHT,
+                                        mIt->second.mRight + EXTRA_TRIANGLE_WIDTH, 
+                                        mIt->second.mTop + EXTRA_TRIANGLE_HEIGHT,
+                                        mIt->second.mLeft + mIt->second.getWidth() / 2, 
+                                        mIt->second.mBottom - EXTRA_TRIANGLE_HEIGHT,
+                                        mTriangleColor, TRUE);
+                        }
+                }
+                else if (!thumb_imagep)
+                {
+                        // draw all the thumbs
+                        curSldrIt = mThumbRects.end();
+                        for(mIt = mThumbRects.begin(); mIt != mThumbRects.end(); mIt++) {
+                                
+                                // choose the color
+                                curThumbColor = mThumbCenterColor;
+                                if(mIt->first == mCurSlider) {
+                                        
+                                        curSldrIt = mIt;
+                                        continue;
+                                        //curThumbColor = mThumbCenterSelectedColor;
+                                }
+
+                                // the draw command
+                                gl_rect_2d(mIt->second, curThumbColor, TRUE);
+                        }
+
+                        // now draw the current slider
+                        if(curSldrIt != mThumbRects.end()) {
+                                gl_rect_2d(curSldrIt->second, mThumbCenterSelectedColor, TRUE);
+                        }
+
+                        // and draw the drag start
+                        if (gFocusMgr.getMouseCapture() == this)
+                        {
+                                gl_rect_2d(mDragStartThumbRect, mThumbCenterColor % opacity, FALSE);
+                        }
+                }
+                else if( gFocusMgr.getMouseCapture() == this )
+                {
+                        // draw drag start
+                        gl_draw_scaled_image_with_border(mDragStartThumbRect.mLeft, 
+                                mDragStartThumbRect.mBottom, 16, 16, 
+                                mDragStartThumbRect.getWidth(), 
+                                mDragStartThumbRect.getHeight(), 
+                                thumb_imagep, mThumbCenterColor % 0.3f, TRUE);
+
+                        // draw the highlight
+                        if (hasFocus())
+                        {
+                                F32 lerp_amt = gFocusMgr.getFocusFlashAmt();
+                                LLRect highlight_rect = mThumbRects[mCurSlider];
+                                highlight_rect.stretch(llround(lerp(1.f, 3.f, lerp_amt)));
+                                gl_draw_scaled_image_with_border(highlight_rect.mLeft, 
+                                        highlight_rect.mBottom, 16, 16, highlight_rect.getWidth(), 
+                                        highlight_rect.getHeight(),
+                                        thumb_imagep, gFocusMgr.getFocusColor());
+                        }
+
+                        // draw the thumbs
+                        curSldrIt = mThumbRects.end();
+                        for(mIt = mThumbRects.begin(); mIt != mThumbRects.end(); mIt++) {
+                                
+                                // choose the color
+                                curThumbColor = mThumbCenterColor;
+                                if(mIt->first == mCurSlider) {
+                                        // don't draw now, draw last
+                                        curSldrIt = mIt;
+                                        continue;                               
+                                }
+                                
+                                // the draw command
+                                gl_draw_scaled_image_with_border(
+                                        mIt->second.mLeft, 
+                                        mIt->second.mBottom, 16, 16, 
+                                        mIt->second.getWidth(), 
+                                        mIt->second.getHeight(), thumb_imagep, 
+                                        curThumbColor, TRUE);
+                        }
+                        
+                        // draw cur slider last
+                        if(curSldrIt != mThumbRects.end()) {
+                                gl_draw_scaled_image_with_border(
+                                        curSldrIt->second.mLeft, 
+                                        curSldrIt->second.mBottom, 16, 16, 
+                                        curSldrIt->second.getWidth(), 
+                                        curSldrIt->second.getHeight(), thumb_imagep, 
+                                        mThumbCenterSelectedColor, TRUE);
+                        }
+                        
+                }
+                else
+                { 
+                        // draw highlight
+                        if (hasFocus())
+                        {
+                                F32 lerp_amt = gFocusMgr.getFocusFlashAmt();
+                                LLRect highlight_rect = mThumbRects[mCurSlider];
+                                highlight_rect.stretch(llround(lerp(1.f, 3.f, lerp_amt)));
+                                gl_draw_scaled_image_with_border(highlight_rect.mLeft, highlight_rect.mBottom, 16, 16, highlight_rect.getWidth(), highlight_rect.getHeight(),
+                                        thumb_imagep, gFocusMgr.getFocusColor());
+                        }
+
+                        // draw thumbs
+                        curSldrIt = mThumbRects.end();
+                        for(mIt = mThumbRects.begin(); mIt != mThumbRects.end(); mIt++) {
+                                
+                                // choose the color
+                                curThumbColor = mThumbCenterColor;
+                                if(mIt->first == mCurSlider) {
+                                        curSldrIt = mIt;
+                                        continue;
+                                        //curThumbColor = mThumbCenterSelectedColor;
+                                }                               
+                                
+                                // the draw command
+                                gl_draw_scaled_image_with_border(
+                                        mIt->second.mLeft, 
+                                        mIt->second.mBottom, 16, 16, 
+                                        mIt->second.getWidth(), 
+                                        mIt->second.getHeight(), thumb_imagep, 
+                                        curThumbColor % opacity, TRUE);
+                        }
+
+                        if(curSldrIt != mThumbRects.end()) {
+                                gl_draw_scaled_image_with_border(
+                                        curSldrIt->second.mLeft, 
+                                        curSldrIt->second.mBottom, 16, 16, 
+                                        curSldrIt->second.getWidth(), 
+                                        curSldrIt->second.getHeight(), thumb_imagep, 
+                                        mThumbCenterSelectedColor % opacity, TRUE);
+                        }
+                }
+
+                LLUICtrl::draw();
+        }
+}
+
+// virtual
+LLXMLNodePtr LLMultiSlider::getXML(bool save_children) const
+{
+        LLXMLNodePtr node = LLUICtrl::getXML();
+
+        node->createChild("initial_val", TRUE)->setFloatValue(getInitialValue());
+        node->createChild("min_val", TRUE)->setFloatValue(getMinValue());
+        node->createChild("max_val", TRUE)->setFloatValue(getMaxValue());
+        node->createChild("increment", TRUE)->setFloatValue(getIncrement());
+
+        return node;
+}
+
+
+//static
+LLView* LLMultiSlider::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
+{
+        LLString name("multi_slider_bar");
+        node->getAttributeString("name", name);
+
+        LLRect rect;
+        createRect(node, rect, parent, LLRect());
+
+        F32 initial_value = 0.f;
+        node->getAttributeF32("initial_val", initial_value);
+
+        F32 min_value = 0.f;
+        node->getAttributeF32("min_val", min_value);
+
+        F32 max_value = 1.f; 
+        node->getAttributeF32("max_val", max_value);
+
+        F32 increment = 0.1f;
+        node->getAttributeF32("increment", increment);
+
+        S32 max_sliders = 1;
+        node->getAttributeS32("max_sliders", max_sliders);
+
+        BOOL allow_overlap = FALSE;
+        node->getAttributeBOOL("allow_overlap", allow_overlap);
+
+        BOOL draw_track = TRUE;
+        node->getAttributeBOOL("draw_track", draw_track);
+
+        BOOL use_triangle = FALSE;
+        node->getAttributeBOOL("use_triangle", use_triangle);
+
+        LLMultiSlider* multiSlider = new LLMultiSlider(name,
+                                                        rect,
+                                                        NULL,
+                                                        NULL,
+                                                        initial_value,
+                                                        min_value,
+                                                        max_value,
+                                                        increment,
+                                                        max_sliders,
+                                                        allow_overlap,
+                                                        draw_track,
+                                                        use_triangle);
+
+        multiSlider->initFromXML(node, parent);
+
+        return multiSlider;
+}