Re: X11, Tcl and Tk for Windows

[Harold L Hunt II <huntharo at msu dot edu>]

Mark,

>   int idc = DefaultColormap (_pdisp, 0); // Failure here, or in
> subsequent call to XParseColor ()

Do these two calls indicate that you are trying to use a PseudoColor 
(e.g. 8 bit palletized color) visual?  If so, then you need to be 
running Windows in 8 bit color mode or you can run in fullscreen mode 
with 8 bit color.  This later one would be done via (XWin.exe 
-fullscreen -depth 8).

PseudoColor is not supported when the underlying display is not a 
pallete-based display.

Please correct me if I am totally off base.

Harold

Mark Horn wrote:

> I am looking for Tcl/Tk v8.0 and a compatible version of Xlib, for a 
> port of an application developed originally for a Unix platform. The 
> application is a based transport simulator, and is written in C++ . The 
> Tcl/Tk is there to provide the GUI, including a window within which X11 
> calls provide "real-time" graphics display of the behaviour of simulated 
> objects (eg "real-time" movement of vehicles across a map).
>
> At first sight Cygwin appears to provide what I need:
>
> a. Include files for tcl and tk in usr/include and for X in 
> X11R6/include/X11.
> b. The X11 library at usr\X11R6\lib\libX11.a ... And the Tcl/Tk 
> libraries tcl80.lib and tk80.lib
>
> But when I link with the libraries mentioned in (b), the following 
> sequence of code leads to failure in the X software. For brevity this 
> code omits checks on call results, which are OK up to the last line.
>
>   _pint = Tcl_CreateInterp();
>   Tcl_Init (_pint);
>   _tk_mainwin = Tk_MainWindow (_pint);
>   _pdisp= Tk_Display (_tk_mainwin);
>   int idc = DefaultColormap (_pdisp, 0); // Failure here, or in 
> subsequent call to XParseColor ()
>
> I have also tried linking with libraries tcl84.lib , tk84.lib from the 
> Tcl/Tk distribution at http://www.tcl.tk/software/ includes .. but in 
> that case I get a failure in the call to Tcl_Init. I would appreciate 
> advice on how to obtain a workable collection of the software libraries, 
> or on some other way of overcoming these difficulties.
>
> Mark Horn