Tk_Main (3) - Linux Manuals
Tk_Main: main program for Tk-based applications
NAME
Tk_Main - main program for Tk-based applications
SYNOPSIS
#include <tk.h> Tk_Main(argc, argv, appInitProc)
ARGUMENTS
- 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.
DESCRIPTION
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);
KEYWORDS
application-specific initialization, command-line arguments, main program