A World of Warcraft addon that shades the trailing end of your cast bar to show time values you normally have to guess at — chiefly your spell queue window, the slice at the end of a cast during which your next spell is already accepted.
Retail only. Built and tested against 12.0.7 (Midnight), ## Interface: 120007.
Three independent overlays, each a coloured band measured backwards from the end of the bar. Any combination can be on at once.
| Overlay | Value |
|---|---|
| SpellQueueWindow | The SpellQueueWindow CVar, in milliseconds |
| Latency | Your home latency from GetNetStats, falling back to world latency |
| Custom | Any millisecond value you enter |
Each band is scaled against the duration of the cast currently in progress, so the same 400ms window covers proportionally more of a fast cast than a slow one.
When several are enabled they are drawn stacked, widest underneath, so a wider band never hides a narrower one.
A tab per overlay, each with its own colour, opacity and enable toggle. The SpellQueueWindow and Latency tabs show the value they currently resolve to, so you can see what is actually being drawn.
/cqo
Opens the options window. It has no arguments — everything is configured in the window. There is also an entry in the standard AddOns settings list, which simply opens the same window.
In combat, /cqo defers: it prints a message and opens the window once
combat ends. This is deliberate — the frame picker needs to grab the keyboard,
and that is blocked in combat.
Works with the default Blizzard cast bar out of the box, and with third-party cast bars by frame name.
The Select Frame button starts a picker: hover any frame and its name is
shown live, TAB cycles through overlapping frames under the cursor, left click
selects, Esc cancels. The picker deliberately searches every region under the
cursor rather than only mouse-enabled ones, since most cast bars disable mouse
input.
Third-party bars are often created after login, so the addon keeps retrying to bind to the frame you named for a short window after you log in, rather than resolving once and silently falling back to Blizzard's bar.
Verified against EllesmereUI's ERB_CastBar.
Copy the CastQueueOverlay folder into:
World of Warcraft/_retail_/Interface/AddOns/
Then /reload or restart the client.
MIT — see LICENSE.