Tk_MainLoop(3)

💅 Tk_MainLoop — loop for events until all windows are deleted 🎀

okay so bestie, quick vibe check: this one's from the Tk Library Procedures corner of the world, section 3 of the manual, and it's genuinely one of the shortest little icons in the whole toolkit. no cap, it's like three lines of actual content but the way it holds up an entire app? main character energy fr fr. 🦋

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✨ SYNOPSIS ✨

#include <tk.h>

Tk_MainLoop()

that's it. that's the whole thing. no arguments, no options, no nothing. she just goes. 💅

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🌸 DESCRIPTION 🌸

so Tk_MainLoop is a procedure that loops repeatedly calling Tcl_DoOneEvent. like, that's literally her whole job — she sits there in a loop, over and over, handing the mic to Tcl_DoOneEvent every single time. 🔁

and here's the part you gotta internalize: she returns only when there are no applications left in this process — meaning, in parenthetical terms, no main windows exist anymore. that's the only exit. no other way out. it's giving "you can check out any time you like" energy. 😭

most windowing applications will call Tk_MainLoop after initialization, and from then on the main execution of the application will consist entirely of callbacks invoked via Tcl_DoOneEvent. like — the entire app is callbacks now. that's the whole runtime. everything after init is just event after event after event, and Tk_MainLoop is the one holding the door open for all of them. 🫶

✨ tiny but important: it's a loop, and it doesn't come back just because you're bored. it comes back when the windows are gone. plan accordingly, bestie. 💀

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🔑 KEYWORDS 🔑

• application
• event
• main loop

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🎀 okay that's the page! she's short, she's iconic, she's the entire heartbeat of your Tk app. mwah. 💖

and for the cute sign-off: this whole thing came to you straight from Tk — the page itself is Tk_MainLoop(3), parked in section 3 of the manual. that's the source and the version right there, no extra date drama attached. slay. 🌈👑