Setting the blendLevel of BGColor with no color...???

[John Patten]

Hi All...

I'm guessing you shouldn't be able to do this:

    on MouseDown
       if the backgroundcolor of me is "" then
       set the backgroundcolor of me to "blue"
set the ink of me to blend
set the blendLevel of me to 50
else
    set the backgroundcolor of me to ""
    set the ink of me to blend
    set the blendLevel of me to 100
    end if
end mouseDown

This works fine with a series of rectangle graphics. Setting the  
backgroundColor to "" results in a transparent rectangle but still  
containing an Opaque qualities. (However still couldn't get them to  
change while mouse down and dragging...but I digress...)

However, when you try to control the blendlevel of colored rectangles  
with a scrollbar the rectangles with their backgroundColor set to ""  
turn white. I was hoping I could still preserve the transparency and  
keep the rectangle grcs opaque. (I need to the user to be able click  
on them to either colorize or remove color with a click.)

Here's my scrollbar:

on mouseStillDown
    put the number of grcs of group "grid" - 1 into ModTransparency
    put 1 into X
    repeat ModTransparency
       set the blendLevel of grc ("rectangle"&X) to ThumbPosition of me
       add 1 to X
    end repeat
    put the thumbPosition of me
end mouseStillDown


Is setting the bgcolor of a grc to "" not really something that is  
supposed to result in a transparent grc with an opaque setting of true?

Thanks!

John Patten