ctk-toolkit

Tk Get Windows HDC

I'm modifying a Tk widget on Windows. I need to get the corresponding HDC given either a Tk Window, Drawable, or GC. I've tried poking around in the Tk internals but can't find anything helpful. The closest I've gotten is using Tk_GetHWND from tkPlatDecls.h and passing that to GetDC from windows.h. However, the result seems to always be null.

Does anyone have any experience with this?

Solution

  • I figured it out! For anyone stumbling across this in the future, you can use:

    #include <tkWinInt.h> // from tk-private/win
// Other code
TkWinDCState state;
HDC hdc = TkWinGetDrawableDC(display, drawable, &state);