#!/usr/bin/perl -w
use strict;
use warnings;
use Glib qw/TRUE FALSE/;
use Gtk2 '-init';

#global variables
my $interface;
my $mapped = 0;
my $progressbar_uasposition;
my $progressbar_waytemp2;
my $progressbar_waytemp1;
my $progressbar_wayfinal;
my $progressbar_waytemp3;
my $progressbar_uas;

#shared Variables
my $die: shared = 0;
my $count_waytemp3 = 0;
my $count_uas = 0;
my $count_uasposition = 0;
my $current_controls = 0;
    
$interface = Gtk2::Window->new('popup');
$interface->set_position('mouse');
$interface->set_border_width( 5);
#$interface->set_decorated(0);
#Gtk2::Window::set_decorated($interface, 0);
    
#Eventbox for capturing the mouse click
my $eventbox_interface = Gtk2::EventBox->new;
    
#table to contain the widgets
my $table_interface = Gtk2::Table->new( 14, 2, FALSE);
    
#spacers for the widgets
my $spacer1 = Gtk2::Label->new();
my $spacer2 = Gtk2::Label->new();
my $spacer3 = Gtk2::Label->new();
my $spacer4 = Gtk2::Label->new();

#Labels
my $label_downloading = Gtk2::Label->new( 'Downloading');
my $label_uploading = Gtk2::Label->new( 'Uploading');

#Bold text for the Main Labels
my $fontdescription = Gtk2::Pango::FontDescription->new;
$fontdescription->set_weight( 'bold');
$label_uploading->modify_font( $fontdescription);
$label_downloading->modify_font( $fontdescription);
    
#The interface for Nav
#text features
my $buffer = Gtk2::TextBuffer->new();

#Label
my $label_nav_waypoint = Gtk2::Label->new( );
my $label_nav_waytemp = Gtk2::Label->new( 'waytemp');
my $label_nav_uas = Gtk2::Label->new( 'uaspf.txt');

#Markup for the text labels
$label_nav_waypoint->set_markup( '<b>Waypoint Generation</b>');

#Create the scrolled window that the lat and long entries will be disp
+layed in
my $swindow_nav = Gtk2::ScrolledWindow->new( undef, undef);
$swindow_nav->set_policy( 'automatic', 'automatic');
$swindow_nav->set_shadow_type( 'etched-out');
my $textview_nav = Gtk2::TextView->new;
$swindow_nav->add( $textview_nav);

#Buttons to compile the waypoint files
my $button_nav_waypoint = Gtk2::Button->new( 'Compile/Send');
my $button_nav_connect = Gtk2::Button->new( 'Connect');

#Horizontal separator
my $hseparator_nav = Gtk2::HSeparator->new;

#Progressbar for the waytemp upload and the uaspf.txt download
$progressbar_waytemp3 = Gtk2::ProgressBar->new;
$progressbar_uas = Gtk2::ProgressBar->new;

#pack the widgets into the table
$table_interface->attach_defaults( $label_nav_waypoint, 0, 2, 0, 1);
$table_interface->attach_defaults( $spacer1, 0, 2, 1, 2);
$table_interface->attach_defaults( $swindow_nav, 0, 2, 2, 3);
$table_interface->attach_defaults( $spacer2, 0, 2, 3, 4);
$table_interface->attach_defaults( $button_nav_waypoint, 0, 2, 4, 5);
$table_interface->attach_defaults( $spacer3, 0, 2, 5, 6);
$table_interface->attach_defaults( $hseparator_nav, 0, 2, 6, 7);
$table_interface->attach_defaults( $label_uploading, 0, 2, 7, 8);
$table_interface->attach_defaults( $label_nav_waytemp, 0, 1, 8, 9);
$table_interface->attach_defaults( $progressbar_waytemp3, 0, 2, 9, 10)
+;
$table_interface->attach_defaults( $spacer4, 0, 2, 10, 11);
$table_interface->attach_defaults( $label_downloading, 0, 2, 11, 12);
$table_interface->attach_defaults( $label_nav_uas, 0, 1, 12, 13);
$table_interface->attach_defaults( $progressbar_uas, 0, 2, 13, 14);
$table_interface->attach_defaults( $button_nav_connect, 1, 2, 14, 15);
        
#Button function; starts the connection
$button_nav_waypoint->signal_connect( 'button-press-event' => sub {my 
+$buffer = $textview_nav->get_buffer; my $string = $buffer->get_text($
+buffer->get_start_iter, $buffer->get_end_iter, 1); print "$string\n";
+});
$button_nav_connect->signal_connect( 'button-press-event' => sub { my 
+$button_nav_label = $button_nav_connect->get_label;
                                                    if ( $button_nav_l
+abel eq 'Connect') {
                                                        $button_nav_co
+nnect->set_label( 'Disconnect');
                                                    }
                                                    else {
                                                        $button_nav_co
+nnect->set_label( 'Connect');
                                                    }
                                                });
    

#add the widgets to the window: widgets->table->eventbox->window
$eventbox_interface->add( $table_interface);
$interface->add( $eventbox_interface);

$interface->show_all;

$interface->signal_connect( 'button-release-event' => sub { Gtk2->main
+_quit});

#allows the popup window entries to work correctly
my $rc = Gtk2::Gdk->keyboard_grab($interface->window, 0 ,Gtk2->get_cur
+rent_event_time);


Gtk2->main;
[download]

It needed the code "my $buffer = $textview_nav->get_buffer".

Doh!!! I shouldn't have missed that. I see the problem now.... in your code you create the textview (with a an automatic buffer ), and you thought it was using $buffer.

#my $textview_nav = Gtk2::TextView->new; 
# should have been
my $textview_nav = Gtk2::TextView->new_with_buffer($buffer);
[download]

If you had used new_with_buffer($buffer) , then reading from the global $buffer would have worked. As it now is written, your global $buffer is unused.

P.S. You might also want to add a line to make the textview have the cursor when it opens.

my $rc = 
Gtk2::Gdk->keyboard_grab($textview_nav->window, 0 ,
                                     Gtk2->get_current_event_time);
[download]

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I'm not really a human, but I play one on earth. Cogito ergo sum a bum