Moved to draft

draft/library/wsf_js_widget/kernel/grid/wsf_datasource.e

@@ -0,0 +1,79 @@
+note
+	description: "Summary description for {WSF_DATASOURCE}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	WSF_DATASOURCE [G -> WSF_ENTITY]
+
+feature --Event handling
+
+	set_on_update_agent (f: PROCEDURE [ANY, TUPLE])
+			--Set update listener
+		do
+			on_update_agent := f
+		end
+
+	update
+			--Trigger update listener
+		do
+			if attached on_update_agent as a then
+				a.call (Void)
+			end
+		end
+
+feature {WSF_PAGE_CONTROL, WSF_CONTROL} -- State management
+
+	state: JSON_OBJECT
+			-- Return state which contains the current sort_column and sort_direction
+		do
+			create Result.make
+			if attached sort_column as a_sort_column then
+				Result.put (create {JSON_STRING}.make_json (a_sort_column), "sort_column")
+			else
+				Result.put (create {JSON_NULL}, "sort_column")
+			end
+			Result.put (create {JSON_BOOLEAN}.make_boolean (sort_direction), "sort_direction")
+		end
+
+	set_state (new_state: JSON_OBJECT)
+			-- Restore sort_column and sort_direction from json
+		do
+			if attached {JSON_STRING} new_state.item ("sort_column") as new_sort_column then
+				sort_column := new_sort_column.unescaped_string_32 -- Implicit Conversion !
+			elseif attached {JSON_NULL} new_state.item ("sort_column") as new_sort_column then
+				sort_column := Void
+			end
+			if attached {JSON_BOOLEAN} new_state.item ("sort_direction") as new_sort_direction then
+				sort_direction := new_sort_direction.item
+			end
+		end
+
+feature -- Change
+
+	set_sort_column (a_sort_column: like sort_column)
+			-- Set the column by which the data should be sorted
+		do
+			sort_column := a_sort_column
+		end
+
+	set_sort_direction (a_sort_direction: like sort_direction)
+			-- Set the sorting direction
+		do
+			sort_direction := a_sort_direction
+		end
+
+feature -- Properties
+
+	sort_column: detachable STRING
+
+	sort_direction: BOOLEAN
+
+	data: ITERABLE [G]
+		deferred
+		end
+
+	on_update_agent: detachable PROCEDURE [ANY, TUPLE]
+
+end