Added field and Matrix cell validation

ee2/third_party/pt_field_pack/pt_fieldtype.php

@@ -115,6 +115,44 @@ private function _structure_options(&$options, $total_levels, $level = 1, $inden
 
 	// --------------------------------------------------------------------
 
+	/**
+	 * Validate
+	 */
+	function validate($data)
+	{
+		// is this a required field?
+		if ($this->settings['field_required'] == 'y')
+		{
+			// make sure there are selections
+			if (! $data)
+			{
+				return lang('required');
+			}
+		}
+
+		return TRUE;
+	}
+
+	/**
+	 * Validate Cell
+	 */
+	function validate_cell($data)
+	{
+		// is this a required cell?
+		if ($this->settings['col_required'] == 'y')
+		{
+			// make sure there are selections
+			if (! $data)
+			{
+				return lang('col_required');
+			}
+		}
+
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
 	/**
 	 * Prep Iterators
 	 */