Tk_SetAppName(3)

💅 Tk_SetAppName — NAME (yes bestie, this is the name section)

okay so Tk_SetAppName 💖 — it sets the name of an application so that send commands can find it. That's the whole vibe. Iconic, lowkey essential.

---

✨ SYNOPSIS ✨

#include <tk.h>

const char *
Tk_SetAppName(tkwin, name)

---

🎀 ARGUMENTS 🎀

• Tk_Window tkwin (in) — token for a window in the application. Fr fr it's only used to pick out which particular application we're talking about, nothing else. It's giving "just here to point at the right one" energy.
• const char *name (in) — the name you wanna register the application under. That's it, that's the assignment.

---

🦋 DESCRIPTION 🦋

So Tk_SetAppName associates a name with a given application and records that association on the display that contains the application's main window. Once you've called this, other applications on that display can use the send command to invoke operations over in your application. Slay, you're reachable now 💅

If name is already in use by some other application on the display — tragic, but okay — then a new name gets generated by appending " #2" to name. And if that name is also in use, the number just keeps getting incremented until an unused name is found. Persistence! The return value from the procedure is a pointer to the name that was actually used — so yeah, check that, don't just assume you got what you asked for 🙈

If the application already has a name when Tk_SetAppName gets called, then the new name replaces the old name. Out with the old, in with the new ✨

Tk_SetAppName also adds a send command to the application's interpreter, which can be used to send commands from this application to others on any of the displays where the application has windows. Multi-display communication, we love to see it 🌈

The application's name registration persists until the interpreter is deleted or the send command is deleted from interp — at which point the name is automatically unregistered and the application becomes inaccessible via send. 😭 The application can be made accessible again by calling Tk_SetAppName. So it's not forever-forever, it's just until-you-delete-things-forever.

ngl the best part: Tk_SetAppName is called automatically by Tk_Init, so applications do not normally need to call it explicitly. It's already handled bestie, you don't gotta do a thing 🫶

And for the Tcl girlies: the command tk appname provides Tcl-level access to the functionality of Tk_SetAppName. iykyk ⭐

---

👑 KEYWORDS 👑

application, name, register, send command

---

and that's the whole page!! 💜 this one comes from the Tk library docs, version 4.0, dated right there at the bottom as Tk_SetAppName(3) — go forth and register those names responsibly, mwah 🎀🌸