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ActiveTcl User Guide |
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Tk_Main - main program for Tk-based applications
#include <tk.h>
Tk_Main(argc, argv, appInitProc)
- int argc (in)
- Number of elements in argv.
- char *argv[] (in)
- Array of strings containing command-line arguments.
- Tcl_AppInitProc *appInitProc (in)
- Address of an application-specific initialization procedure.
The value for this argument is usually Tcl_AppInit.
Tk_Main acts as the main program for most Tk-based
applications. Starting with Tk 4.0 it is not called main
anymore because it is part of the Tk library and having a function
main in a library (particularly a shared library) causes
problems on many systems. Having main in the Tk library
would also make it hard to use Tk in C++ programs, since C++
programs must have special C++ main functions.
Normally each application contains a small main function
that does nothing but invoke Tk_Main. Tk_Main then
does all the work of creating and running a wish-like application.
When it is has finished its own initialization, but before it
processes commands, Tk_Main calls the procedure given by the
appInitProc argument. This procedure provides a
“hook” for the application to perform its own
initialization, such as defining application-specific commands. The
procedure must have an interface that matches the type
Tcl_AppInitProc:
typedef int Tcl_AppInitProc(Tcl_Interp *interp);
AppInitProc is almost always a pointer to Tcl_AppInit; for more details on
this procedure, see the documentation for Tcl_AppInit.
application-specific
initialization, command-line
arguments, main
program
Copyright © 1995-1997 Roger E. Critchlow Jr.
Copyright © 1994 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.