Drag to switch node port order not working

[gab3d]

Issue Summary

In the OpenToonz Manual ir reads:
"In the FXs that accept multiple input nodes it is possible to change the stacking order of the input nodes by clicking and dragging in ports area."
https://opentoonz.readthedocs.io/en/latest/applying_special_fx.html#transparency

...this seems to not be working currently and could be a good time saver!

Steps to Reproduce

In a node that has multiple inputs, and they are already connected to other nodes.
Drag from one node input port to another port of the same node.

Expected Results

To switch the connected nodes order.

Actual Results

Nothing... 😄

System Information

• OpenToonz Version: 1.3
• Operating System: Windows

[WolfInABowl]

This is what is being described, is it this that is not working correctly?

[artisteacher]

I think it depends on the FX. I can get that to work for the Over FX node - but not everything. It definitely does not work for Matte nodes...

[gab3d]

@WolfInABowl
yes, that same thing.

Now I see it works in the Over fx (it worked for me too), could you please try it on any of the following effects?:

• Over Ino
• Matte In
• Art Contour
• External Palette
• Glow
• Warp
• Bokeh Iwa

...basically I couldn't find any other fx node where this works, but the Over node.

[artisteacher]

It partially works for a particle node. It seems to me that it only works when you are changing between the same port type - ie. texture to texture or control to control. It won't work when trying to switch from texture to control, source to matte or etc.

Ideally, you should be able to switch input this way no matter what you are changing between.

[gab3d]

@artisteacher
mmm... 🤔 in the Over Ino it doesn't work and the ports are of the same type.

[artisteacher]

Nope - foreground vs background.

[gab3d]

...while testing what @artisteacher said about "switching partially working" in particle nodes, I saw another strange thing happening there when you try to switch between a Texture and a Control port:

• the ports seem to get connected theirselves (a vertical connection line shows between the two) and the previously connected nodes seem to get disconnected (I stress "seem" because if you delete one of the nodes that was previously connected to one of those ports the port gets connected to another node automatically).

Now, I realized that if you click on the Reorder Nodes button, the connection lines show again (and the switch was never performed).
So there must be a drawing/update issue in the Schematic, and switching between Texture and Control ports don't work for particle nodes.

[gab3d]

@artisteacher

Nope - foreground vs background.

you mean the actual visible name of the ports has to be identical for this to work?

[artisteacher]

you mean the actual visible name of the ports has to be identical for this to work?

That's what I think - or at least that when the name is different there are likely structural differences to the code that prevent it from working.