[PD] <<Loaded>> virtual event

[Mathieu Bouchard]

Le 2012-02-20 à 13:54:00, Jonathan Wilkes a écrit :

> And it doesn't quite work.  The <<Loaded>> virtual event will trigger 
> before Tk is actually finished drawing the patch window.

Well, there are four possible distinct meanings of « finished loading » 
that could be helpful :

1. the patch has finished loading in the «server»... the t_canvas objects 
have been created, their subobjects have been loaded if they're stored in 
files, the .x76543210 receive symbols exist, so Tk can send to them. 
[initbang] has been run (some dynamic patching depends on it).

2. [loadbang] has also finished running. This means that all the rest of 
the load-time dynamic patching is done, and the patch's own init has all 
been run, so that you can start using the patch for real.

3. all the sys_queuegui() calls related to this toplevel canvas have been 
done, and all sys_gui() calls have already gone through the sendbuf, the 
TCP connection, and have been eval'd. This means that all the Tk Canvas 
Items have been created, so that you can send to them, make stats about 
them, query their info, etc.

4. All the stuff drawn in step 3 has appeared in the framebuffer of the 
videocard. This means that it's read to use a screenshot tool such as [#in 
x11] or gnome-screenshot.

I think that there are different uses for each of those levels. For my 
patch_dans_patch picture series, I would have liked some kind of object 
that would have told me that everything has been drawn on the screen, but 
this would require a (very small) change to Tk itself, AFAIK.

> If I send the message to create the tip manually, after the patch has 
> finished loading, it displays fine.

The fact that you wait for it to appear on the screen, makes it a level 4 
notification.

What you need for the tooltip to work is probably a level 3 notification.

What is available now in pd43 is a level 2 notification, afaik.

I don't have examples of uses of level 1 notifications, but I feel like 
there are. But I don't think that it's strictly necessary to implement 
this level, because it's quite close to level 2. I think that levels 2,3,4 
are much more useful.

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| Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC