Re: Impossible call 'patch' inside onkeydown handler?

[Christian W. <cwa...@gm...>]

Andrea Viarengo wrote:
> onkeydown (
>     function(key)
>       p_ref=patch{nx=1,ny=1,nz=0,nw=1,nh=1,angley=90,image="left.png"}  
>       return false
>    end
>    )
> --------------------------------------------------------------
> 
> When you press a key, you will get the message:
> 
>     Error running local keydown handler:
>     1/node.lua:13: attempt to call global 'patch' (a nil value)

This is by design. "patch" is only available at node loading time, not 
as a run-time function. You should not think of it as a function (even 
though it technically is one), but as part of a declarative node 
description syntax.

> if I substitute patch with pipmak_internal.patch, it seems to work fine,
> for this simple example,
> but using a more complex code, Pipmak crash in that point...

You're not supposed to use pipmak_internal. It's called internal for a 
reason...

We should probably make sure that you can't crash Pipmak even if you do, 
but that looks quite tedious... :/

> Is it a problem of my build, or really I cannot define a new patch inside
> a keydown handler?

You can't create patches at run time. What would you need that for? 
Would it be very inconvenient to have to reload the node for it?

  -Christian