GLUTCREATESUBWINDOW(3)

✨ NAME ✨

ok so this is glutCreateSubWindow — the OpenGLUT girlies' fave for making a subwindow 🪟💖 and yes we're getting into it, bestie

This one lives in the OpenGLUT window library, so like, window-coded through and through 🎀

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🌸 SYNOPSIS 🌸

#include <openglut.h>

int
glutCreateSubWindow(int parentID, int x, int y, int w, int h);

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💅 PARAMETERS 💅

• parentID — the window identifier of the parent, aka who's your daddy (window). 👑
• x — horizontal position of the subwindow. side to side, bestie ➡️
• y — vertical position of the subwindow. up and down, bestie ⬇️
• w — width of the subwindow. how thicc 📏
• h — height of the subwindow. how tall 📐

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🦋 DESCRIPTION 🦋

okay so here's the tea: in almost every regard that actually matters to you, a subwindow is literally just like a top-level window. no cap. it has a window id ✨ it has its own set of event callbacks ✨ you can render to it ✨ you get notified of its creation ✨ the whole vibe.

A subwindow lives inside some other window — could be a top-level window, could be another subwindow, it's giving nesting dolls 🪆. And because of that, it generally only interacts with other windows of your own creation, which means it is not subjected to a window manager. that's the whole reason it hits different from a top-level window:

• There are no borders or decorations. none. clean face, no makeup 💅
• There is no title bar, hence no title. it's anonymous, it's mysterious 🕶️
• Requests tend to be acted on a little more directly, without interference from a window manager. instant. no middleman 🏃♀️
• The subwindow inherits the display mode of its parent. genetics, babes 🧬

Like a top-level window, you must register a display callback function if you wish to use glutMainloop(). do not skip this step i am begging 🙏

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⚠️ ok so a notable case where this function can fail is for offscreen windows. A coherent concept of a subwindow of an offscreen window would introduce more complication than is presently believed to be worthwhile. Attempting such a window presently just fails. Failure is denoted by a 0 window id being returned. so if you get a 0 back, that's your sign bestie, it did not slay 💀

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🌈 why subwindows are actually iconic 🌈

Subwindows can be very useful for partitioning a window into GUI elements:

• They have their own input callbacks, so you don't have to figure out which window an event is for. it knows. it always knows 🧚
• Graphics are clipped to the boundaries of your subwindows, so you do not need to worry much about where your drawing goes. spill your art everywhere, it stays contained 🎨
• Because windows and subwindows work almost identically from the perspective of a GLUT program, it is relatively easy to move a cluster of related controls into a separate top-level window — or, conversely, embed what was a top-level window inside of another window. ✨ shapeshifting ✨
• OpenGLUT can also report some basic statistics about your (sub)window, relieving you of the duty of tracking all of that information for yourself. it's got you 🫶

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👑 SEE ALSO 👑

• glutCreateWindow(3)
• glutDestroyWindow(3)
• glutCreateMenuWindow(3)

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and that's the whole page, bestie 🍓 this one's from the OpenGLUT manual, dated UNDATED, and the footer says UNTITLED() which is honestly so real of it — no title, just vibes 💜✨