dynamically creating/setting properties, Was: setting scaled image troubles

Hi,

> 
> 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)">

Thanks, this works - but not quite the way I wanted it to be :)

The problem is that the setObjProperty call only accepts names that are 
already defined in the system.

So, if I wanted the image to be scaled based on some select-box in the 
editing interface, I have to create an image-property for each offered size.

This works, and if there is no other solution, I'll stick with it.

However, I wonder if there is a way of adding a hitherto unknown property?

Thanks,

Diez