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#!/usr/bin/perl -w
#
# Size Groups
#
# GtkSizeGroup provides a mechanism for grouping a number of
# widgets together so they all request the same amount of space.
# This is typically useful when you want a column of widgets to
# have the same size, but you can't use a GtkTable widget.
#
# Note that size groups only affect the amount of space requested,
# not the size that the widgets finally receive. If you want the
# widgets in a GtkSizeGroup to actually be the same size, you need
# to pack them in such a way that they get the size they request
# and not more. For example, if you are packing your widgets
# into a table, you would not include the GTK_FILL flag.
#
package sizegroup;
use strict;
use Glib qw(TRUE FALSE);
use Gtk2;
my $window = undef;
#
# Convenience function to create an option menu holding a number of strings
#
sub create_option_menu {
my @strings = @_;
if (Gtk2->CHECK_VERSION (2, 4, 0)) {
my $combo_box = Gtk2::ComboBox->new_text;
foreach my $str (@strings) {
$combo_box->append_text ($str);
}
$combo_box->set_active (0);
return $combo_box;
} else {
# on older versions, Gtk2::ComboBox is not available.
my $menu = Gtk2::Menu->new;
foreach my $str (@strings) {
my $menu_item = Gtk2::MenuItem->new_with_label ($str);
$menu_item->show;
$menu->append ($menu_item);
}
my $option_menu = Gtk2::OptionMenu->new;
$option_menu->set_menu ($menu);
return $option_menu;
}
}
sub add_row {
my ($table, $row, $size_group, $label_text, @options) = @_;
my $label = Gtk2::Label->new_with_mnemonic ($label_text);
$label->set_alignment (0, 1);
$table->attach ($label,
0, 1, $row, $row + 1,
[qw/expand fill/], [],
0, 0);
my $option_menu = create_option_menu (@options);
$label->set_mnemonic_widget ($option_menu);
$size_group->add_widget ($option_menu);
$table->attach ($option_menu,
1, 2, $row, $row + 1,
[], [],
0, 0);
}
sub toggle_grouping {
my ($check_button, $size_group) = @_;
# GTK_SIZE_GROUP_NONE is not generally useful, but is useful
# here to show the effect of GTK_SIZE_GROUP_HORIZONTAL by
# contrast.
my $new_mode = $check_button->get_active
? 'horizontal'
: 'none';
$size_group->set_mode ($new_mode);
}
sub do {
my @color_options = qw/Red Green Blue/;
my @dash_options = qw/Solid Dashed Dotted/;
my @end_options = qw/Square Round Arrow/;
if (!$window) {
$window = Gtk2::Dialog->new_with_buttons ("GtkSizeGroup", undef, [],
'gtk-close' => 'none');
$window->set_resizable (FALSE);
$window->signal_connect (response => sub { $window->destroy; 1 });
$window->signal_connect (destroy => sub { $window = undef; 1 });
my $vbox = Gtk2::VBox->new (FALSE, 5);
$window->vbox->pack_start ($vbox, TRUE, TRUE, 0);
$vbox->set_border_width (5);
my $size_group = Gtk2::SizeGroup->new ('horizontal');
# Create one frame holding color options
#
my $frame = Gtk2::Frame->new ("Color Options");
$vbox->pack_start ($frame, TRUE, TRUE, 0);
my $table = Gtk2::Table->new (2, 2, FALSE);
$table->set_border_width (5);
$table->set_row_spacings (5);
$table->set_col_spacings (10);
$frame->add ($table);
add_row ($table, 0, $size_group, "_Foreground", @color_options);
add_row ($table, 1, $size_group, "_Background", @color_options);
# And another frame holding line style options
#
$frame = Gtk2::Frame->new ("Line Options");
$vbox->pack_start ($frame, FALSE, FALSE, 0);
$table = Gtk2::Table->new (2, 2, FALSE);
$table->set_border_width (5);
$table->set_row_spacings (5);
$table->set_col_spacings (10);
$frame->add ($table);
add_row ($table, 0, $size_group, "_Dashing", @dash_options);
add_row ($table, 1, $size_group, "_Line ends", @end_options);
# And a check button to turn grouping on and off
my $check_button = Gtk2::CheckButton->new ("_Enable grouping");
$vbox->pack_start ($check_button, FALSE, FALSE, 0);
$check_button->set_active (TRUE);
$check_button->signal_connect (toggled => \&toggle_grouping, $size_group);
}
if (!$window->visible) {
$window->show_all;
} else {
$window->destroy;
}
return $window;
}
1;
__END__
Copyright (C) 2003 by the gtk2-perl team (see the file AUTHORS for the
full list)
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Library General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option) any
later version.
This library 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 Library General Public License for more
details.
You should have received a copy of the GNU Library General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307 USA.
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