Re: GnomeCanvas Enumerate Items

Thanks for the help.

Now I've come upon another problem. I'm failing to see how I'm suppose 
to get the properties of something like this. For example, I have a 
polygon and I want to iterate through the points or get the background 
color.

Thanks.

Jacques Garrigue wrote:
> From: Gregory Malecha <[email protected]>
>   
>> I was able to get most of this working using wrap_item. There are a few 
>> cases that it apparently doesn't handle though. Mainly group, text, 
>> rich_text, etc, the ones that aren't GnoCanvas.items. Here's the code 
>> that I have:
>>
>> type annotated_item =
>>     Group of GnomeCanvas.group_p GnoCanvas.item (* I'd like this to be 
>> GnoCanvas.group *)
>>     
> [...]
>   
>>   else if GnomeCanvas.Types.is_a item GnomeCanvas.Types.group then
>>     let gp = GnoCanvas.wrap_item item GnomeCanvas.Types.group in
>>     Group gp
>>     
> [..]
>   
>> Does anyone know of a way to get a GnoCanvas.group rather than a 
>> GnomeCanvas.group_p GnoCanvas.item when performing the cast?
>>     
>
> Since you have already checked that it has the right type, you can use
> Gobject.unsafe_cast.
>
>    new GnomeCanvas.group (Gobject.unsafe_cast item)
>
> Looks safe enough to me.
>
> Jacques
> ---------------------------------------------------------------------------
> Jacques Garrigue      Nagoya University     garrigue at math.nagoya-u.ac.jp
> 		   <A HREF=http://www.math.nagoya-u.ac.jp/~garrigue/>JG</A>
>
>   

-- 
gregory malecha
wiess college
computer science
219.510.3400