On-screen
 

Is that possible to make an add-on which create an On-screen message (middle of the screen for example) from other add-ons chat messages?

I don't think that'd be safe to attempt. My item finder pulls up 100 items at a time. If such an addon blindly intercepts all addon messages targeting chat, you'd have quite the feed.

Addons can write Center screen messages. If you want some of your addons do so, just ask to the specified author.

And same answer as Rhyono, I have addons which output massively, so it won't be a good idea.

I understand.

Wrote to the author anyway. I was just curious that an add-on can be connected to other add-on this way. Can add a limitation to not be overspammed, can filter it. Was thinking about a simple add-on, right click on a text in the chat and every time that message appear it will print to the middle of the screen.

How complicated to add an on-screen display to an add-on? I have 0 knowledge of the add-ons so probably very difficult for me.

It's easily doable anyway but this kind of feature should be into a chat addon ;)

from what addon you are talking about?

To redirect d() messages to something else, you need to prehook / rewrite d() (and CHAT_SYSTEM_AddMessage() too)
There is not a lot of addons doing this except pChat

For THIS add-on I would like to have an on-screen message as in my chats I have the system messages disabled to prevent overspamming my chat with loots.

Hope the author will answer. Ha was online here like a month ago.:(