Re: setting scaled image troubles

Diez,

As far as I understand you're trying to create the thumbnail within a  
python script. You don't have to.
Inside your content object create a method (method, not DTML-Method!)   
"onChangeObjEvt" with the following code:

<dtml-call "setObjProperty('img',  
createThumbnail 
(img 
= 
getObjProperty 
('imghighres 
',REQUEST 
),maxdim 
= 
getObjProperty 
('thumbwidth 
',REQUEST),qual=getObjProperty('thumbquality',REQUEST)),lang)">

This one replaces the "img" field (type: image) with a thumbnail from  
the image from the imghighres and takes the properties for maxdim and  
quality (jpeg quality) from the string fields thumbwidth and  
thumbquality.
If you want to just resize the existing image inside field "img"  
replace imghighres with img.

Without using different fields:

<dtml-call "setObjProperty('img',  
createThumbnail 
(img=getObjProperty('imghighres',REQUEST),maxdim=20,qual=95),lang)">

Yours sincerely
Sebastian Tänzer

tänzer media group e.K.
design development consulting

c/o amcm GmbH
Kekuléstr. 39
53115 Bonn
Germany

Tel      +49-228-33646-23
Fax     +49-228-33646-13
Mobil  +49-174-333-7001

E-Mail [email protected]
WWW  http://www.taenzer.me

Am 03.02.2009 um 22:41 schrieb Diez B. Roggisch:

> Hi,
>
> I'm trying to create a ZMSGraphic-like custom-object that auto- 
> generates
> preview images to embed into the text.
>
> I found more or less everything I need. pil_img_resize, ImageFromData.
>
> But after creating a scaled image, I don't seem to be able to set it  
> to
> the custom object as property, let alone invoke getHref on it.
>
> See the below code for a debugging session. Any suggestions?
>
> (Pdb) img = context.getObjProperty("img", request)
> (Pdb) scaled_img = context.pil_img_resize(img, (20, 20))
> (Pdb) scaled_blob = context.ImageFromData(scaled_img['data'])
> (Pdb) p scaled_blob
> <MyImage at >
> (Pdb) p img
> <MyImage at >
> (Pdb) context.setObjProperty("scaled_img", scaled_blob, "ger")
> (Pdb) context.getObjProperty("scaled_img", request)
> ''
>
> Diez
>
>