Changing Value of mulitple items at once with GUI Slider

[joe-harford]

I'm struggling to change the values across multiple objects using a GUI slider.

I have everything working on single objects, but when trying to do the same with multiple I run into problems.

Here is the script below -

global proc globalBrushWidth()
{       
    // Get polys in selection
    string $origSelect[] = ls -sl;
    $polysInSelection = filterExpand -selectionMask 12;
    select $polysInSelection;

    for ($node in $polysInSelection)
    {

        string $history[] = listHistory $node;
        int $histArraySize = size($history);
        $brushIndex = ($histArraySize - 3);
        select $history[ $brushIndex ];
        string $brushSel[] = ls -sl;
        // Output to slider
        $brushWidth = $brushSel[0] + ".globalScale";       
        float $brushWidthVal = floatSliderGrp -q -value setBrushWidthSlider ;
        setAttr $brushWidth $brushWidthVal;
    }
    select $polysInSelection;
}

Thanks for the help in advance

global proc globalBrushWidth()
{       
    // Get polys in selection
    string $origSelect[] = ls -sl;
    $polysInSelection = filterExpand -selectionMask 12;
    select $polysInSelection;

    for ($node in $polysInSelection)
    {

        string $history[] = listHistory $node;
        int $histArraySize = size($history);
        $brushIndex = ($histArraySize - 3);
        select $history[ $brushIndex ];
        string $brushSel[] = ls -sl;
        // Output to slider
        $brushWidth = $brushSel[0] + ".globalScale";       
        float $brushWidthVal = floatSliderGrp -q -value setBrushWidthSlider ;
        setAttr $brushWidth $brushWidthVal;
    }
    select $polysInSelection;
}