Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

Chapter 21 ■ Responding to the Combat Log and Threat Information 401Writing CombatStatusAs an example of how the combat log can be used to get detailed informationabout combat in World of Warcraft, you will create an addon called CombatStatus.The initial version will show the damage per second and heals persecond for your party, including pets.The addon is structured with the following observations in mind:You can take advantage of unit flags to make capturing all of yourparty’s events easier. In particular, you can check for COMBATLOG_OBJECT_AFFILIATION_PARTY to get the relevant events.Because combat data arrives with GUID information rather than unitIDs,you’ll need to make sure you store and index all data using GUIDs. Thiswill ensure that you don’t lose any information if the order of unitIDschange.A player might have more than one pet (for example, druids and theirtreant pets, or shaman elemental totems). Rather than trying to considerthem individual pets, you can just collapse them into a single ‘‘pet’’ unitfor each of your party members. You can use the SPELL_SUMMON combat logevent to detect new units coming into play so we can track their GUIDs.Creating the Basic Addon StructureIn your Addons folder, create a new directory called CombatStatus. Inside,create a new file called CombatStatus.toc with the following contents:## Interface: 30300## Notes: Provides a DPS meter for your partyCombatStatus.luaCombatStatus.xmlAlthough you aren’t using any XML templates in this addon currently, it’sbetter to create the file now in case you choose to add some at a later time. CreateanewCombatStatus.xml file and add the basic element declaration: