Add ability to disconnect a link by clicking and dragging about imnodes

[Nelarius]

Hi @leifhelm! I'm not 100 % I understood what you mean. For two days now, it's possible to do this using the master branch:

You can reconnect a detached link to any pin, and the link will be created again (i.e. IsLinkCreated will return true). Doing this is sort of broken in the color-node example though, I need to do a massive refactor to the code there 🙈

[r-lyeh]

Also, in UE4:

• CTRL+clicking on an input or output pin will disconnect current pin and attach wire to mouse cursor, so you can reconnect the link to some other input/output pin very quickly.
• ALT+clicking on an input/output pin will remove hovered pin connection.
• ALT+clicking on a link will remove link plus and its connected pins.

[Nelarius]

The CTRL + click is a good idea - it would let you disconnect the wire/link while letting you drag new links from the pin 👍

[leifhelm]

Dragging from an output pin to reconnect could also be an option, if only one link can be connected to an output.

[leifhelm]

I was wondering if you could enable/disable this on a per attribute basis. This would enable multiple connections if they sould be possible. I plan on enabling one output to be distributed to many inputs but an input sould only have one connection.

PS: I too noticed that the examples are broken and not enable this. Furthermore, it is possible to right click outside of the windows in the examples and still open the context menu. (probably missing something like a ImGui::IsWindowHovered() check)

[Nelarius]

Okay yes, now I see! Yes, something like that could be done -- I was actually thinking about adding some sort of options for enabling/disabling this feature, exactly for the use-case you are talking about! But enabling it on a per-attribute basis is probably the most general way of doing it. 🙂

Furthermore, it is possible to right click outside of the windows in the examples and still open the context menu. (probably missing something like a ImGui::IsWindowHovered() check)

🙈 Noted, I will try to fix soon. Once I'm happy with some of the bigger changes here, I will try to rework that example.

[Nelarius]

Updated the parent comment with my current plans for detaching links.

[Nelarius]

All right, detaching by clicking and dragging can be enabled on a pin-by-pin basis, and links can also be detached by left-clicking on them with a modifier pressed (the link wire will jump to the mouse cursor). Calling this done for now 🙂