Gtk2 2d Table Demo

[zentara]

Category:

GUI Programming

Description:

A simple demo, to show how to display data in a nicely colored Table in Gtk2. Mouse actions on elements is demonstrated. A Table in Gtk2 more closely resembles an html table, unlike plain Tk Tables, which are more like cell grids.

#!/usr/bin/perl
use warnings;
use strict;
use Gtk2 -init;

# mouse buttons 1,2 and 3 all do different actions as demo


# hack the col widths by padding header entries
my @AoA = (
     ['','   Header1   ','   Header2   ','   Header3   ','   Header4  
+ '],
     ['row0',1,2,3,4],
     ['row1',5,6,7,8],     #example data
     ['row2',9,10,11,12],
     ['row3',13,14,15,16],
);

# add more random data
my $count = 4;
foreach my $new(1..100){
  my $aref = ['row'.$count, rand_string(), rand_string(),rand_string()
+, rand_string() ];
  push @AoA, $aref;
  $count++;
}

my $rows = scalar @AoA;
my $cols = scalar @{$AoA[0]};
print "$rows $cols\n";

# override any pixmap based themes so color can show
Gtk2::Rc->parse_string(<<__);

style "default"
{

bg_pixmap[NORMAL] = "<none>"
bg_pixmap[INSENSITIVE] = "<none>"
bg_pixmap[ACTIVE] = "<none>"
bg_pixmap[PRELIGHT] = "<none>"

}class "GtkWidget" style "default"
__

# Create the window
my $window = new Gtk2::Window ( "toplevel" );
$window->signal_connect ("delete_event", sub { Gtk2->main_quit; });
$window->set_default_size(500, 300);
$window->set_border_width (10);


my $white = Gtk2::Gdk::Color->new (0xFFFF,0xFFFF,0xFFFF);
$window->modify_bg ('normal', $white);

my $vbox = Gtk2::VBox->new( 0, 0 );
#$vbox->modify_bg ('normal', $color);

my $title = Gtk2::Label->new("2D Array Table -w- alternate colored row
+s");
my $font_desc = Gtk2::Pango::FontDescription->from_string ("Times New 
+Roman Italic 20");

$title->modify_font($font_desc);

$title->modify_fg('normal',Gtk2::Gdk::Color->parse("#0000ff"));
$title->set_size_request(-1, 40);
$vbox->pack_start($title,0, 1, 0);

my $scwin = Gtk2::ScrolledWindow->new();
$scwin->set_policy('automatic', 'automatic');

my $table = Gtk2::Table->new($rows,$cols);

my $header_color = Gtk2::Gdk::Color->parse("#CCFFCC");
my $row_color = Gtk2::Gdk::Color->parse("#DDFFDD");
my $odd_color = Gtk2::Gdk::Color->parse("#FFCC66");
my $even_color = Gtk2::Gdk::Color->parse("#CCFF99");
my $black = Gtk2::Gdk::Color->parse("#000000");
my $red = Gtk2::Gdk::Color->parse("#FFCCCC");

my $font_desc_h = Gtk2::Pango::FontDescription->from_string ("Times Ne
+w Roman 25");

my $tooltip = Gtk2::Tooltips->new;

for (my $row=0; $row < $rows; ++$row) {
        for (my $col=0; $col < $cols; ++$col) {
    
            my $event_box = Gtk2::EventBox->new;
            my $label = Gtk2::Label->new ( $AoA[$row][$col]);
            my $length = length( $AoA[$row][$col] );
            
            # add a tooltip
            my $tip_text = $AoA[$row][$col];
            $tooltip->set_tip($event_box, $tip_text, undef);

            #$event_box->modify_bg (normal => $color);
            $label->set_alignment(0, 0.5);
            $label->set_justify('left'); 
#            $label->set_width_chars( $length );
            $event_box->add ($label);
            $label->show;
            
             
        if ($row == 0) { 
                $label->modify_font($font_desc_h);
                $event_box->modify_bg (normal => $header_color);
             } elsif ($row %2 ==0) { 
                $event_box->modify_bg (normal => $even_color);
             }
        
        if ($col == 0) {
                $label->set_width_chars($length + 5);
             }    
    
        #$table->attach_defaults ($event_box, $col, $col+1, $row, $row
++1);
         $table->attach($event_box, $col, $col+1, $row, $row+1,'fill',
+'fill',1,2);
         
         # add some activities with mouse 1 and 3 on each entry
        $event_box->signal_connect( 'button_release_event', 
              sub{
              my ($item, $event) = @_;
              #print "$item, $event\n";
              my $button_num = $event->button();
              #print "$button_num\n";
        
              if( $button_num == 1){
                     print $label->get_text(),"\n";
                   }
        
            if( $button_num == 2){
                    $item->modify_bg (normal => $red);
                   }
        
            if( $button_num == 3){
                    $item->modify_bg (normal => $black);
                   }
    
          } );
        
    }
}

$scwin->add_with_viewport( $table );
$vbox->pack_start( $scwin, 1, 1, 0 );
$window->add( $vbox );


$window->show_all();
Gtk2->main;

sub rand_string{
  my @charset = ('a'..'z','A'..'Z','0'..'9');
  my $length_desired = 15;
   my $random_string;
   for(1..$length_desired){
     $random_string .= $charset[rand @charset];
    }
return  $random_string;
}

__END__