#!/usr/bin/perl
use strict;

use Tk;
use Tk::TFrame;

my $con_but_txt = "Connect";
my $online = 0;

my $rd_b2;

# Set the software version and display it!
my $statusmsg = 'Version 0.1';

#------------
my $mw = MainWindow->new;

#------------
my $seg2_f = $mw->TFrame(-label => 'Segment 2',
                        -relief => 'groove',
                        -borderwidth => 2);

$rd_b2 = $seg2_f->Button(-text => "Read", -state => 'disabled', -command => [\&read_seg, 2]);
$rd_b2->grid(-row => 3, -column => 1, -sticky => "e", -padx => 4);

my $ts_e2   = $seg2_f->Text(-wrap => 'word', -width => 50, -height => 6)->grid(
                                                        -padx => 4, -pady => 4,
                                                        -row => 0, -column => 3,
                                                        -sticky => "nsew", -rowspan => 4);

$seg2_f->grid(-row => 1, -column => 0, -sticky => "nsew",-padx => 2);

#-------------
my $base_f = $mw->Frame( -relief => 'groove',
                        -borderwidth => 2);

my $status = $base_f->Label(-textvariable => \$statusmsg, -borderwidth => 2, -width => 20,
                                -relief => 'groove')->grid(-row => 1, -column => 0,
                                -sticky => "w",-padx => 2,-pady => 3);

my $conn_b = $base_f->Button(-textvariable => \$con_but_txt, -command => \&connect)->grid(-row => 1,
                                                -column => 3, -sticky => "e");

$base_f->Button(-text => "Exit", -command => sub {exit})->grid(-row => 1, -column => 4,
                                                        -sticky => "e");

$base_f->grid(-row => 2, -column => 0, -sticky => "w",-padx => 2);

#-------------

#-----------------------------------------
sub read_seg {
my $cnt;
my $inpstr;
my ($segnum) = @_;
        $statusmsg = sprintf("Reading Segment %d", $segnum);
        $mw->update();
        $mw->after(500);
        $statusmsg = "Online";
        $mw->update();
}

sub connect {
my $cnt;
my $inpstr;

# Connect / Disconnect
#
    if ($online == 0) {
        $online = 1;
        $con_but_txt = "Disconect";
        $statusmsg = 'Online';
    } else {
        $online = 0;
        $con_but_txt = "Connect";
        $statusmsg = 'Offline';
    }
    update_buttons();
}

# Enable/Disable various buttons
#
sub update_buttons {
    if ($online == 0) {  # We are Offline
#       $rd_b2->cofigure(-state => 'disabled');
        $mw->$seg2_f->$rd_b2->cofigure(-state => 'disabled');
    } else {             # We are Online
#       $rd_b2->cofigure(-state => 'normal');
        $mw->$seg2_f->$rd_b2->cofigure(-state => 'normal');
    }
}