Quoting Ba la <[EMAIL PROTECTED]>:
> Hi Mark,
> I am opening two displays using
> XtOpenDisplay()
> function call after that I am creating two shells
> using XtAppCreateShell(), in that my first function
> XtAppCreateShell() succeeds, but the second function
> call to create shell using XtAppCreateShell fails and
> dumps the core, the parameters diff is the 1st
> parameter app_name and the 4th parameter Display(what
> I got from XtOpenDisplay) remaining all same, I didn't
> find any syntax error in that 2nd call, then how come
> it is getting fails ???, (I am working in 8bpp mode)
>
> I am in the process of finding out the error, can
> you give me some hints!!!! on this issue.
>
> my questions are,
> ** out of two createshell functions one is succeeds
> other fails, is it really error with
> XtAppCreateSheel() function call or some errors with
> XtOpenDisplay itself,
> ** is ther anyway to check whether the XtOpenDisplay
> function executed properly and the display is opened
> for funther operation like that.
Hi,
I just wrote this small test program, and it seens to work:
--
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
XtAppContext appcon;
Widget shell1, shell2;
Display *display1, *display2;
int
main(int argc, char *argv[])
{
Arg args[2];
Cardinal num_args;
XtToolkitInitialize();
num_args = 0;
XtSetArg(args[num_args], XtNwidth, 100); ++num_args;
XtSetArg(args[num_args], XtNheight, 100); ++num_args;
appcon = XtCreateApplicationContext();
display1 = XtOpenDisplay(appcon, NULL, "test1", "Test", NULL, 0, &argc,
argv);
display2 = XtOpenDisplay(appcon, NULL, "test2", "Test", NULL, 0, &argc,
argv);
shell1 = XtAppCreateShell("test1", "Test", applicationShellWidgetClass,
display1, args, num_args);
shell2 = XtAppCreateShell("test2", "Test", applicationShellWidgetClass,
display2, args, num_args);
XtRealizeWidget(shell1);
XtRealizeWidget(shell2);
XtAppMainLoop(appcon);
return (0);
}
--
I noticed that if you pass NULL as the argc argument to XOpenDisplay, it
will try to deference it, so I believe the problem you are seeing may be
passing NULL were a valid pointer is expected. I didn't test connecting
to two different X servers, so there maybe some problem in this case.
> Thanks in advance.
> Bala.
>
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Paulo
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