[Qgis-user] Data Defined operation

[Saulteau Don]

It says it wants to see the colour value as a string.

So in your case, you can use a CASE THEN ELSE END statement to get there.

CASE WHEN "Type" = 'SL' THEN '255,0,0,100' END

There the numbers represent 'red,green,blue,alpha'
Alpha is the transparency value. 0 is completely transparent and 100 is not
transparent.

On Tue, Feb 7, 2017 at 9:08 PM, Springfield Harrison <stellargps at gmail.com>
wrote:

> Hello,
>
>     Attempting to use the Data Defined function (tool?).
>
>     The following configuration has no effect; it may be looking for a
> colour input.  This DD is to set the background colour on a label where
> Type = SL.
>
>     If I use this function on bold Text, it works but that requires no
> input, it just toggles.
>
>     Where am I supposed to enter the "Expected Input" colour
> specifications?
>
> Data defined override
> Active: yes  (ctrl|right-click toggles)
> Expected input:
> string [r,g,b,a] as int 0-255
> Valid input types:
> string
> Current definition (expression):
> "Type" = 'SL'
>
> Thanks very much . . . .
>
> Cheers . . . . . Springfield Harrison
>
>
>
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