Tk_SetWindowVisual(3)

✨ NAME ✨

Okay so bestie, this is Tk_SetWindowVisual(3) from the Tk Library Procedures manual — and it's literally here to change visual characteristics of window 💅

🌸 SYNOPSIS 🌸

#include <tk.h>

int
Tk_SetWindowVisual(tkwin, visual, depth, colormap)

🎀 ARGUMENTS 🎀

• Tk_Window tkwin (in) — token for window. Like, the window token, periodt.
• Visual *visual (in) — new visual type to use for tkwin.
• int depth (in) — number of bits per pixel desired for tkwin.
• Colormap colormap (in) — new colormap for tkwin, which must be compatible with visual and depth.

💖 DESCRIPTION 💖

When Tk creates a new window, it assigns it the default visual characteristics for its screen — that's visual, depth, and colormap. Tk_SetWindowVisual may be called to change them. No cap.

🚨 Timing check, bestie: Tk_SetWindowVisual must be called before the window has actually been created in X (e.g. before Tk_MapWindow or Tk_MakeWindowExist has been invoked for the window). The safest thing is to call Tk_SetWindowVisual immediately after calling Tk_CreateWindow. Slay.

If tkwin has already been created before Tk_SetWindowVisual is called, then it returns 0 and does not make any changes; otherwise it returns 1 to signify that the operation completed successfully. So yes, the return value is giving “did it work or not” energy.

Note that Tk_SetWindowVisual should not be called if you just want to change a window's colormap without changing its visual or depth — call Tk_SetWindowColormap instead. Iykyk 💅

🔑 KEYWORDS 🔑

colormap, depth, visual

Cute footer sign-off: this one is from Tk 4.0 (source/version), and the footer isn't showing a separate date, just the version and page name — mwah, bestie 💋✨