XMDIRECTIONMATCH(3)

💅 XmDirectionMatch — the library call that checks for a specified direction component

okay bestie, gather round, because today we're talking about XmDirectionMatch, a little function from the <Xm/Xm.h> world (yes, the Xm library call section, she's official) 🎀

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✨ SYNOPSIS ✨

#include <Xm/Xm.h>
Boolean XmDirectionMatch (d1, d2)
        XmDirection     d1;
        XmDirection     d2;
(void)

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🦋 DESCRIPTION 🦋

So XmDirectionMatch takes two XmDirection values and compares them. It hands you back a Boolean depending on whether those two inputs "match" or not. The simplest match is when d1 and d2 are literally identical, but bestie, that is NOT the only way to match. There are other matches, and they're kind of iconic honestly.

Here's the tea: XmDirectionMatch only tries to compare the specified bits. The nonspecified bits just automatically match, no questions asked. It's giving "we're not gonna stress about the parts you didn't mention" energy 💅

For example (and this one's important, so pay attention), suppose d1 equals XmTOP_TO_BOTTOM_RIGHT_TO_LEFT. In that case the function will return True if d2 equals either XmRIGHT_TO_LEFT or XmTOP_TO_BOTTOM. Cute, right? BUT — and this is the plot twist 😭 — the function will return False if d2 equals XmTOP_TO_BOTTOM_LEFT_TO_RIGHT, XmBOTTOM_TO_TOP_RIGHT_TO_LEFT, or XmBOTTOM_TO_TOP_LEFT_TO_RIGHT.

Now here's the part where it gets ✨nuanced✨. Direction can be thought of as having three components:

1. a horizontal component
2. a vertical component
3. the precedence among them

Which means — even on top of all those directions we just talked about — the function will still return False if d1 equals XmTOP_TO_BOTTOM_RIGHT_TO_LEFT and d2 equals XmRIGHT_TO_LEFT_TOP_TO_BOTTOM. Same vibes, different precedence, and she said nope 🙈

The parameters, bestie:

• d1 — Specifies an XmDirection value.
• d2 — Specifies an XmDirection value.

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🌈 RETURN VALUES 🌈

Returns True if d1 "matches" d2; otherwise, returns False. That's it, that's the whole personality 🫶

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👑 RELATED INFORMATION 👑

Go read these next, they're all in the same friend group:

• XmDirection(3)
• XmDirectionMatchPartial(3)
• XmDirectionToStringDirection(3)
• XmString(3)
• XmStringDirection(3)
• XmStringDirectionToDirection(3)

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and that's the whole page, bestie 💜 this was XmDirectionMatch(library call) — straight out of the Xm library call manual, mwah, no notes, periodt ✨