Create a Form::Cancel; FormBuilder doesn't automatically add Save/Cancel buttons so this can serve as a Cancel button for it; it attempts to correctly handle either closing the modal pop-up dialog or else going back in history/going back to the page that linked to this one. needs tests. the Cancel button in TabSet needs to use this logic.

lib/WebGUI/Form/Cancel.pm

@@ -0,0 +1,66 @@
+package WebGUI::Form::Cancel;
+
+=head1 LEGAL
+
+ -------------------------------------------------------------------
+  WebGUI is Copyright 2001-2012 Plain Black Corporation.
+ -------------------------------------------------------------------
+  Please read the legal notices (docs/legal.txt) and the license
+  (docs/license.txt) that came with this distribution before using
+  this software.
+ -------------------------------------------------------------------
+  http://www.plainblack.com                     info@plainblack.com
+ -------------------------------------------------------------------
+
+=cut
+
+use strict;
+use base 'WebGUI::Form::Button';
+use WebGUI::International;
+
+=head1 NAME
+
+Package WebGUI::Form::Cancel
+
+=head1 DESCRIPTION
+
+Created a "Cancel" button that goes back in history or links to the referrer, depending.
+
+=head1 SEE ALSO
+
+This is a subclass of WebGUI::Form::Button.
+
+=head1 METHODS 
+
+The following methods are specifically available from this class. Check the superclass for additional methods.
+
+=cut
+
+sub new {
+
+    my $package = shift;
+    my $session = shift;
+
+    # taken from WebGUI::TabForm so that it can be easily added to FormBuilder built forms
+    my $i18n = WebGUI::International->new($session);
+
+    my $cancelURL = $session->request->referer;
+    my $cancelJS_fragment = $cancelURL ? sprintf("window.location.href='%s'", $cancelURL) : ' history.go(-1)';
+    my $cancelJS  = q{
+        if( window.parent && window.parent.admin window.parent.admin.modalDialog ) {
+            window.parent.admin.closeModalDialog();
+        } else {
+            $cancelJS_fragment;
+        }
+    };
+
+    $package->SUPER::new( $session, 
+        value  => $i18n->get('cancel'), 
+        extras => qq{onclick="javascript: $cancelJS" class="backwardButton"},
+        @_,
+    );
+
+}
+
+1;
+