Tk_Main - based applications
#include <tk.h> Tk_Main(argc, argv, appInitProc)
Tk_Main(3tk) Tk Library Procedures Tk_Main(3tk)
______________________________________________________________________________
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. On
Windows, when using -DUNI-
CODE, the parameter type
changes to wchar_t *.
Tcl_AppInitProc *appInitProc (in) Address of an application-
specific initialization pro-
cedure. 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 argu-
ment. 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_AppInit-
Proc:
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.
Tk_Main functions much the same as Tcl_Main. In particular, Tk_Main
supports both an interactive mode and a startup script mode, with the
file name and encoding of a startup script under the control of the
Tcl_SetStartupScript and Tcl_GetStartupScript routines. However it
calls Tk_MainLoop after processing any supplied script, and in interac-
tive uses events registered with Tcl_CreateFileHandler to process user
input.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | runtime/tk-8 |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
Tcl_DoOneEvent(3)
KEYWORDS
application-specific initialization, command-line arguments, main pro-
gram
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://source-
forge.net/projects/tcl/files/Tcl/8.6.7/tk8.6.7-src.tar.gz/download.
Further information about this software can be found on the open source
community website at https://www.tcl.tk/.
Tk 4.0 Tk_Main(3tk)