XMCHANGECOLOR(3)

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💖 XmChangeColor — the glow-up button for your widget's whole color story 💖

ok so real talk, this is XmChangeColor from the Xm library, and it lives in section 3 of the manual (the library call section, bestie, not a command you type in your shell). It's a function, it's a C thing, and it's lowkey iconic. Let's get into it. 🎀

✨ SYNOPSIS ✨

#include <Xm/Xm.h>
void XmChangeColor(
Widget widget,
Pixel background);

no cap, that's the whole signature. two args, returns nothing, changes everything. 💅

🌸 DESCRIPTION 🌸

XmChangeColor handles all the color modifications for the widget you point at whenever you hand it a new background pixel value. It's the main character of color math.

Here's the tea: when you give it a new background color, it recalculates the foreground, select, and shadow colors based on that new background, and then it sets the corresponding resources on the widget for you. So you don't have to go resource-hunting yourself. Obsessed, honestly. 🦋

And the plot twist — the way it figures out those new colors depends on you:

  • If a color calculation procedure has been set by a call to XmSetColorCalculation, then XmChangeColor uses that procedure to calculate the new colors. Your rules, your vibe.
  • Otherwise? It just uses a default procedure. Perfectly fine, no notes, it's got you. ✨

🫶 The Arguments 🫶

  • widget — specifies the widget ID whose colors will be updated. Like, the actual widget you want the glow-up applied to. Point at it, that's the one. 👑
  • background — specifies the background color pixel value. This is the new background pixel, and everything else gets derived from it. It's giving the source of truth for the whole color situation.
Heads up bestie: those two argument descriptions are the entire contract. There's no return value — the function is void, so it just does the thing and says nothing. Silent. Mysterious. Efficient. 💀

these are the sibling functions, the little friend group, the ones you'll wanna meet too:

iykyk, if you're messing with XmChangeColor you're probably gonna need at least one of these. fr fr. 🌸

okay that's the whole page!! 💜 this little writeup came to you straight from the Xm library docs — it's the library call manual entry for XmChangeColor, section 3, and yeah the page header and footer both just say XmChangeColor(library call) because the docs said so and I respect the docs. 🫶 stay colorful, bestie. 🎀✨🦋

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