Added WSF_MULTI_CONTROL to support controls that consist of multiple separate controls.

library/server/wsf_html/webcontrol/wsf_multi_control.e

@@ -0,0 +1,62 @@
+note
+	description: "Summary description for {WSF_MULTI_CONTROL}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	WSF_MULTI_CONTROL
+
+inherit
+
+	WSF_CONTROL
+
+create
+	make
+
+feature {NONE}
+
+	controls: LIST [WSF_CONTROL]
+
+	make (n: STRING)
+		do
+			control_name := n
+			controls := create {LINKED_LIST [WSF_CONTROL]}.make;
+		end
+
+	handle_callback (event: STRING; cname: STRING; page: WSF_PAGE_CONTROL)
+		do
+			if equal (cname, control_name) then
+
+			else
+				across
+					controls as c
+				loop
+					c.item.handle_callback(event, cname, page)
+				end
+			end
+		end
+
+	render: STRING
+		do
+			Result := ""
+			across
+				controls as c
+			loop
+				Result := Result + c.item.render
+			end
+		end
+
+	state: JSON_OBJECT
+		local
+			temp: JSON_OBJECT
+		do
+			create Result.make
+			across
+				controls as c
+			loop
+				temp := c.item.state
+			end
+		end
+
+end