How to delete a layer in script-fu

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Graechan

Post subject: Re: How to delete a layer in script-fu

Posted: Wed Jun 01, 2011 2:22 am (#11)

Gimp Scripts Editor

Joined: Feb 18, 2011
Posts: 1673
Location: Australia

TA-DA

I got it

I had previously assigned "brouillard uni" as "activelayer" in the Let block all I needed was (gimp-image-remove-layer img activelayer). which did not occur to me because Frame 9 was the active layer.

Thanks for prodding me Mahvin

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paynekj

Post subject: Re: How to delete a layer in script-fu

Posted: Wed Jun 01, 2011 2:30 am (#12)

Gimp Scripts Editor

Joined: Jun 22, 2010
Posts: 599
Location: Here and there

Agh I got Ninja'd.....

But here's what I was writing any way ...

The delete procedure will be expecting an id number not a string, so you need to find the id of the "Brouillard uni" layer. Here's some code I wrote as part of someone else's problem that finds a layer id based on it's name:

Code: Select all

; routine to find the Id of a layer given the layer name
(define (kp24_find_layer_by_name image layerName)
  (let* (
           (layerList (vector->list (cadr (gimp-image-get-layers image))))    ; get the list of layer ids
           (wantedLayerId -1)
           (layerText "")
        )
        
        (for-each
          (lambda (layerId)
            (set! layerText (car (gimp-drawable-get-name layerId))) ; get a layer name
            (if (string=? layerText layerName)   ; is it the one we want?
              (set! wantedLayerId layerId)       ; it is, so save the layer id
            )            
          )
          layerList
        )
        (if (= -1 wantedLayerId)      ; didn't find it so complain
          (error (string-append "Could not find a layer with name:- " layerName))
        )
        (list wantedLayerId)
  )
)

to use it you pass it the image id and the string that is name of your layer. It returns a list containing the id of the layer:

Code: Select all

   (set! wanted_layer_id (car (kp24_find_layer_by_name imageId "Brouillard uni")))
   (gimp-drawable-delete wanted_layer_id)

Kevin

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ofnuts

Post subject: Re: How to delete a layer in script-fu

Posted: Wed Jun 01, 2011 2:34 am (#13)

GimpChat Member

Joined: Oct 25, 2010
Posts: 1353

I don't use script-fu, but another possibility is to iterate the layers and delete those with a name that match "Frame*" (or whatever regexp will work in TinyScheme). Personally, I make a habit of calling my temporary work items (layers, gradients, brushes...) with a "#" so that they are easier to spot.

In python-fu you have an <Image> object, that has an array of <Layer> (unexpectedly called "layers"), ordered as in the layer stack, so the top layer is image.layers[0]. Welcome to the 21st century

PS: sorta ninja'd by paynejk myself

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Graechan

Post subject: Re: How to delete a layer in script-fu

Posted: Wed Jun 01, 2011 4:25 am (#14)

Gimp Scripts Editor

Joined: Feb 18, 2011
Posts: 1673
Location: Australia

thank you Kevin I noted all that in case I need in future. And Offnuts its evident I don't do script-fu either :hehe

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