XtCallActionProc(3)

💖 XtCallActionProc — the XT FUNCTIONS era 💖

okay bestie, we're doing a deep dive on XtCallActionProc from the X Toolkit Intrinsics manual (that's the Xt in XtCallActionProc(3) btw, iykyk). she's a libXt girlie and she is so useful. let's get into it 🦋

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✨ NAME ✨

XtCallActionProc — invoke an action procedure directly 🎀

like, you just. call it. no translation table middleman. main character energy fr.

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🌸 SYNTAX 🌸

#include <X11/Intrinsic.h>

void XtCallActionProc(Widget widget, const char *action, XEvent *event,
       String *params, Cardinal num_params);

look at her. five args. she's giving efficient 💅

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🫶 ARGUMENTS 🫶

• widget — the widget where you want the action to go down. heads up bestie: it Must be of class core or any subclass thereof. no exceptions, that's the vibe check.
• action — the name of the action routine. the lil string that says who's getting summoned ✨
• event — the contents of the event that gets handed over to the action routine. yes you're literally constructing the event yourself, we love a DIY moment 💀
• params — the contents of the params passed to the action routine. the little suitcase of args 🎀
• num_params — the number of entries in params. (the manpage says "num" and honestly? iconic, we're keeping it exactly as written, no cap.) 🔥

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🌈 DESCRIPTION 🌈

so here's the tea ☕ — XtCallActionProc goes searching for the named action routine in the same manner and order as translation tables are bound. same search, same priority, same whole system. she's not doing anything new, she's just doing it directly 👑

if she finds it, the action routine gets invoked with the widget you specified, the event pointer, and the parameters. slay. ✨

but now the important part, and i need you to actually read this one:

it is the responsibility of the caller — that's you, bestie, that's your job 💅 — to make sure the contents of the event, params, and num_params arguments are appropriate for the specified routine, and if necessary, that the specified widget is realized or sensitive.

no one is checking your work for you. she trusts you. do not betray her. 😭

and if the named action routine cannot be found? she generates a warning message and returns. that's it. no crash, no drama, just a warning and a little "anyway…" 🙈

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👑 SEE ALSO 👑

• X Toolkit Intrinsics - C Language Interface
• Xlib - C Language X Interface

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X Version 11 ✦ libXt 1.3.1 ✦ and that's the whole XtCallActionProc(3) page, bestie 🦋 go call some action procs, stay realized, stay sensitive, and remember: the caller is always responsible. periodt. 💖✨🎀