tk_main(3)
NAME
Tk_Main - main program for Tk-based applications
SYNOPSIS
#include <tk.h> Tk_Main(argc, argv, appInitProc)
ARGUMENTS
- int argc (in) Number of ele
- ments in argv.
- char *argv[] (in) Array of
- strings con
taining com
mand-line argu
ments. - Tcl_AppInitProc *appInitProc (in) Address of an
- applicationspecific ini
tialization
procedure. The
value for this
argument is
usually
Tcl_AppInit.
DESCRIPTION
Tk_Main acts as the main program for most Tk-based appli
cations. Starting with Tk 4.0 it is not called main any
more 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 applica
tion.
- 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 initial
ization, 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.
KEYWORDS
application-specific initialization, command-line argu