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diff --git a/linden/indra/llui/llslider.cpp b/linden/indra/llui/llslider.cpp
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+/** 
+ * @file llslider.cpp
+ * @brief LLSlider base class
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
+ */
+
+#include "linden_common.h"
+
+#include "llslider.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"
+
+const S32 THUMB_WIDTH = 8;
+const S32 TRACK_HEIGHT = 6;
+
+LLSlider::LLSlider( 
+        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,
+        const LLString& control_name)
+        :
+        LLUICtrl( name, rect, TRUE,     on_commit_callback, callback_userdata, 
+                FOLLOWS_LEFT | FOLLOWS_TOP),
+        mValue( initial_value ),
+        mInitialValue( initial_value ),
+        mMinValue( min_value ),
+        mMaxValue( max_value ),
+        mIncrement( increment ),
+        mMouseOffset( 0 ),
+        mDragStartThumbRect( 0, mRect.getHeight(), THUMB_WIDTH, 0 ),
+        mThumbRect( 0, mRect.getHeight(), THUMB_WIDTH, 0 ),
+        mTrackColor(            LLUI::sColorsGroup->getColor( "SliderTrackColor" ) ),
+        mThumbOutlineColor(     LLUI::sColorsGroup->getColor( "SliderThumbOutlineColor" ) ),
+        mThumbCenterColor(      LLUI::sColorsGroup->getColor( "SliderThumbCenterColor" ) ),
+        mDisabledThumbColor(LLUI::sColorsGroup->getColor( "SliderDisabledThumbColor" ) ),
+        mMouseDownCallback( NULL ),
+        mMouseUpCallback( NULL )
+{
+        // prperly 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(getValueF32());
+}
+
+EWidgetType LLSlider::getWidgetType() const
+{
+        return WIDGET_TYPE_SLIDER_BAR;
+}
+
+LLString LLSlider::getWidgetTag() const
+{
+        return LL_SLIDER_TAG;
+}
+
+void LLSlider::setValue(F32 value, BOOL from_event)
+{
+        value = llclamp( value, mMinValue, mMaxValue );
+
+        // Round to nearest increment (bias towards rounding down)
+        value -= mMinValue;
+        value += mIncrement/2.0001f;
+        value -= fmod(value, mIncrement);
+        mValue = mMinValue + value;
+
+        if (!from_event)
+        {
+                setControlValue(mValue);
+        }
+        
+        F32 t = (mValue - mMinValue) / (mMaxValue - mMinValue);
+
+        S32 left_edge = THUMB_WIDTH/2;
+        S32 right_edge = mRect.getWidth() - (THUMB_WIDTH/2);
+
+        S32 x = left_edge + S32( t * (right_edge - left_edge) );
+        mThumbRect.mLeft = x - (THUMB_WIDTH/2);
+        mThumbRect.mRight = x + (THUMB_WIDTH/2);
+}
+
+F32 LLSlider::getValueF32() const
+{
+        return mValue;
+}
+
+BOOL LLSlider::handleHover(S32 x, S32 y, MASK mask)
+{
+        if( gFocusMgr.getMouseCapture() == this )
+        {
+                S32 left_edge = THUMB_WIDTH/2;
+                S32 right_edge = mRect.getWidth() - (THUMB_WIDTH/2);
+
+                x += mMouseOffset;
+                x = llclamp( x, left_edge, right_edge );
+
+                F32 t = F32(x - left_edge) / (right_edge - left_edge);
+                setValue(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 LLSlider::handleMouseUp(S32 x, S32 y, MASK mask)
+{
+        BOOL handled = FALSE;
+
+        if( gFocusMgr.getMouseCapture() == this )
+        {
+                gFocusMgr.setMouseCapture( NULL, NULL );
+
+                if( mMouseUpCallback )
+                {
+                        mMouseUpCallback( this, mCallbackUserData );
+                }
+                handled = TRUE;
+                make_ui_sound("UISndClickRelease");
+        }
+        else
+        {
+                handled = TRUE;
+        }
+
+        return handled;
+}
+
+BOOL LLSlider::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
+        {
+                setValue(mInitialValue);
+                onCommit();
+        }
+        else
+        {
+                // Find the offset of the actual mouse location from the center of the thumb.
+                if (mThumbRect.pointInRect(x,y))
+                {
+                        mMouseOffset = (mThumbRect.mLeft + 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, NULL );  
+                mDragStartThumbRect = mThumbRect;                               
+        }
+        make_ui_sound("UISndClick");
+
+        return TRUE;
+}
+
+BOOL    LLSlider::handleKeyHere(KEY key, MASK mask, BOOL called_from_parent)
+{
+        BOOL handled = FALSE;
+        if( getVisible() && mEnabled && !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:
+                        setValue(getValueF32() - getIncrement());
+                        onCommit();
+                        handled = TRUE;
+                        break;
+                case KEY_RIGHT:
+                        setValue(getValueF32() + getIncrement());
+                        onCommit();
+                        handled = TRUE;
+                        break;
+                default:
+                        break;
+                }
+        }
+        return handled;
+}
+
+void LLSlider::draw()
+{
+        if( getVisible() )
+        {
+                // Draw background and thumb.
+
+                // drawing solids requires texturing be disabled
+                LLGLSNoTexture no_texture;
+
+                LLRect rect(mDragStartThumbRect);
+
+                F32 opacity = mEnabled ? 1.f : 0.3f;
+
+                // Track
+
+                LLUUID thumb_image_id;
+                thumb_image_id.set(LLUI::sAssetsGroup->getString("rounded_square.tga"));
+                LLImageGL* thumb_imagep = LLUI::sImageProvider->getUIImageByID(thumb_image_id);
+
+                S32 height_offset = (mRect.getHeight() - TRACK_HEIGHT) / 2;
+                LLRect track_rect(0, mRect.getHeight() - height_offset, mRect.getWidth(), height_offset );
+
+                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);
+                //gl_rect_2d( track_rect, mThumbOutlineColor % opacity );
+
+                if (!thumb_imagep)
+                {
+                        gl_rect_2d(mThumbRect, mThumbCenterColor, TRUE);
+                        if (gFocusMgr.getMouseCapture() == this)
+                        {
+                                gl_rect_2d(mDragStartThumbRect, mThumbCenterColor % opacity, FALSE);
+                        }
+                }
+                else if( gFocusMgr.getMouseCapture() == this )
+                {
+                        gl_draw_scaled_image_with_border(mDragStartThumbRect.mLeft, mDragStartThumbRect.mBottom, 16, 16, mDragStartThumbRect.getWidth(), mDragStartThumbRect.getHeight(), 
+                                thumb_imagep, mThumbCenterColor % 0.3f, TRUE);
+
+                        if (hasFocus())
+                        {
+                                F32 lerp_amt = gFocusMgr.getFocusFlashAmt();
+                                LLRect highlight_rect = mThumbRect;
+                                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());
+                        }
+
+
+                        gl_draw_scaled_image_with_border(mThumbRect.mLeft, mThumbRect.mBottom, 16, 16, mThumbRect.getWidth(), mThumbRect.getHeight(), 
+                                thumb_imagep, mThumbOutlineColor, TRUE);
+
+                        //// Start Thumb
+                        //gl_rect_2d( mDragStartThumbRect, mThumbOutlineColor % 0.3f );
+                        //rect.stretch(-1);
+                        //gl_rect_2d( rect, mThumbCenterColor % 0.3f );
+
+                        //// Thumb
+                        //gl_rect_2d( mThumbRect, mThumbOutlineColor );
+                }
+                else
+                { 
+                        if (hasFocus())
+                        {
+                                F32 lerp_amt = gFocusMgr.getFocusFlashAmt();
+                                LLRect highlight_rect = mThumbRect;
+                                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());
+                        }
+
+                        gl_draw_scaled_image_with_border(mThumbRect.mLeft, mThumbRect.mBottom, 16, 16, mThumbRect.getWidth(), mThumbRect.getHeight(), 
+                                thumb_imagep, mThumbCenterColor % opacity, TRUE);
+                        //rect = mThumbRect;
+
+                        //gl_rect_2d( mThumbRect, mThumbOutlineColor % opacity );
+                        //  
+                        //rect.stretch(-1);
+
+                        //// Thumb
+                        //gl_rect_2d( rect, mThumbCenterColor % opacity );
+
+                }
+
+                LLUICtrl::draw();
+        }
+}
+
+// virtual
+LLXMLNodePtr LLSlider::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* LLSlider::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
+{
+        LLString name("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);
+
+
+        LLSlider* slider = new LLSlider(name,
+                                                        rect,
+                                                        NULL,
+                                                        NULL,
+                                                        initial_value,
+                                                        min_value,
+                                                        max_value,
+                                                        increment);
+
+        slider->initFromXML(node, parent);
+
+        return slider;
+}