## Copyright (C) 1998, 1999, 2000 Joao Cardoso.
## 
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by the
## Free Software Foundation; either version 2 of the License, or (at your
## option) any later version.
## 
## This program is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## This file is part of tk_octave.

## tk_progress(val, text)
##
## creates a progress bar indicator window it it does not exist, and
## sets the bar of scale bar to value ( 0 <= val <= 100), and prints 'text'.
## if it exists, then only 'val' and 'text' are updated
## if called without arguments, destroys the window
##
## Octave can continue processing

## 2001-09-14 Paul Kienzle <pkienzle@users.sf.net>
## * converted for use with pthreads-based tk_octave

function tk_progress(val, text)

        tk_init
	if (nargin == 0)
		tk_cmd( "destroy .top_progress");
		return
	endif

	if (tk_cmd( "winfo exists .top_progress" ) != "1")
		tk_cmd( "toplevel .top_progress" );
		tk_cmd( "wm title .top_progress Progress" );
		tk_cmd( "label .top_progress.lab1 -relief ridge \
-text \"Wait please\" -padx 10 -pady 5 -textvariable tk_progress_message" ); 
		tk_cmd( "scale .top_progress.sca1 -orient horiz \
-showvalue 1 -sliderlength 10 -state disabled -variable tk_progress_value" );

		tk_cmd( "pack .top_progress.lab1 -anchor center -expand 1 \
-fill both -padx 20 -pady 10 -side top" ); 
		tk_cmd( "pack .top_progress.sca1 -anchor center -expand 1 \
-fill x -padx 20 -pady 10 -side top" );
	endif

	if (nargin >= 1)
		tk_cmd( sprintf("set tk_progress_value %d", val) );
	endif
	if (nargin == 2)
		tk_cmd( sprintf( "set tk_progress_message \"%s\"", text) );
		tk_cmd( sprintf( "wm title .top_progress {%s}", text) );
	endif

endfunction