WoWInterface - Event question: SPELL_CAST

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- - Event question: SPELL_CAST_SUCCESS (https://www.wowinterface.com/forums/showthread.php?t=44949)

Event question: SPELL_CAST_SUCCESS

Hi I'm a newbie addon developer and I'm running into some trouble understanding the SPELL_CAST_SUCCESS event. I wrote a short block of code that is supposed to detect when a specific spell is casted and then trigger a cooldown frame I set up. However, the event only triggers when the spell casted is an instant cast spell such as Corruption or Drain Soul. When I successfully cast a casted spell like Haunt or Shadow Bolt, the event doesn't trigger.

Can someone help me understand why SPELL_CAST_SUCCESS doesn't work for casted spells and what event I should be using instead?

Here is my code for reference:

Code:

function DispelBar_OnEvent(event,...)        

        local timeStamp, event, hideCaster, sourceGUID, sourceName, sourceFlags, sourceRaidFlags, destGUID, destName, destFlags, destRaidFlags = select(1,...)

        

        if(event=="SPELL_CAST_SUCCESS") then

                local spellName = select(13,...)

                print("SPELL_CAST_SUCCESS"..": "..spellName)

                if(spellName == "Haunt") then

                        CooldownFrame:SetCooldown(GetTime(), 10)

                end

        end

end

In this example if I changed

Code:

if(spellName == "Haunt")

to an instant cast spell like

Code:

if(spellName == "Corruption")

then it works.

Thanks for all help in advance and let me know if I need to clarify anything.

I ran into something like this before and I forgot how I handled it. I'll have to take a look at combat log events again and see what comes up. You should be able to run the /etrace command and it'll show you a log of every event firing when they happen.

Thanks a lot for the etrace command I didn't know it existed. Very useful! With it I found that UNIT_SPELLCAST_SUCCEEDED can be used instead.

Thanks again

Followup question: Why wouldnt' SPELL_CAST_SUCCESS work? The descriptions of it in all the documentation I've read never seem to mention any exceptions.

To avoid any client/locale issues, it's probably best to use spell ID instead of spell name in if statments

Quote:

Originally Posted by indoviet (Post 267710)

Because you are using the combat log events, which do not necessarily fire in the order you expect. If I were to guess, I would say you are getting _SUCCESS before the _CAST event is finished. CLEU is a last resort event; you should always check specific events whenever possible, if they exist. 98% of what happens in the game can be mapped to events that are not COMBAT_LOG_EVENT_UNFILTERED.

Why does CLEU fire in strange order? There is no solid answer, but latency, user/client CPU/RAM, ISP quality, and many other factors have their impact. The SPELLCAST events fire only on the client, and have no client-Blizzard-client loop, which is why they always work.

But that's my best guess.