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theme.py: Check if we can actually get an Xorg/X11 display

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The added exception at least means we don't then segmentation fault in
the next line, but it also means we then hit another exception later
in the main loop as we try to create the main Tk window.

Hopefully the exception messages will be clear enough to the user.

closes #500
This commit is contained in:
Athanasius 2020-07-04 09:37:50 +01:00
parent 87d7c823a7
commit af9c44640f
1 changed files with 2 additions and 0 deletions
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theme.py
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@ -85,6 +85,8 @@ elif platform == 'linux':
XQueryTree.argtypes = [POINTER(Display), Window, POINTER(Window), POINTER(Window), POINTER(Window), POINTER(c_uint)]
XQueryTree.restype = c_int
dpy = xlib.XOpenDisplay(None)
if not dpy:
raise Exception("Can't find your display, can't continue")
motif_wm_hints_property = XInternAtom(dpy, b'_MOTIF_WM_HINTS', False)
motif_wm_hints_normal = MotifWmHints(MWM_HINTS_FUNCTIONS | MWM_HINTS_DECORATIONS,
MWM_FUNC_RESIZE | MWM_FUNC_MOVE | MWM_FUNC_MINIMIZE | MWM_FUNC_CLOSE,