+let choose_must list_of_must can =
+ let chosen = ref None in
+ let user_constraints = ref [] in
+ let window =
+ GWindow.window
+ ~modal:true ~title:"Query refinement." ~border_width:2 () in
+ let vbox = GPack.vbox ~packing:window#add () in
+ let hbox =
+ GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let lMessage =
+ GMisc.label
+ ~text:
+ ("You can now specify the genericity of the query. " ^
+ "The more generic the slower.")
+ ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let hbox =
+ GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let lMessage =
+ GMisc.label
+ ~text:
+ "Suggestion: start with faster queries before moving to more generic ones."
+ ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let notebook =
+ GPack.notebook ~scrollable:true
+ ~packing:(vbox#pack ~expand:true ~fill:true ~padding:5) () in
+ let _ =
+ let page = ref 0 in
+ let last = List.length list_of_must in
+ List.map
+ (function must ->
+ incr page ;
+ let label =
+ GMisc.label ~text:
+ (if !page = 1 then "More generic" else
+ if !page = last then "More precise" else " ") () in
+ let expected_height = 25 * (List.length must + 2) in
+ let height = if expected_height > 400 then 400 else expected_height in
+ let scrolled_window =
+ GBin.scrolled_window ~border_width:10 ~height ~width:600
+ ~packing:(notebook#append_page ~tab_label:label#coerce) () in
+ let clist =
+ GList.clist ~columns:2 ~packing:scrolled_window#add
+ ~titles:["URI" ; "Position"] ()
+ in
+ ignore
+ (List.map
+ (function (uri,position) ->
+ let n =
+ clist#append
+ [uri; if position then "MainConclusion" else "Conclusion"]
+ in
+ clist#set_row ~selectable:false n
+ ) must
+ ) ;
+ clist#columns_autosize ()
+ ) list_of_must in
+ let _ =
+ let label = GMisc.label ~text:"User provided" () in
+ let vbox =
+ GPack.vbox ~packing:(notebook#append_page ~tab_label:label#coerce) () in
+ let hbox =
+ GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let lMessage =
+ GMisc.label
+ ~text:"Select the constraints that must be satisfied and press OK."
+ ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let expected_height = 25 * (List.length can + 2) in
+ let height = if expected_height > 400 then 400 else expected_height in
+ let scrolled_window =
+ GBin.scrolled_window ~border_width:10 ~height ~width:600
+ ~packing:(vbox#pack ~expand:true ~fill:true ~padding:5) () in
+ let clist =
+ GList.clist ~columns:2 ~packing:scrolled_window#add
+ ~selection_mode:`EXTENDED
+ ~titles:["URI" ; "Position"] ()
+ in
+ ignore
+ (List.map
+ (function (uri,position) ->
+ let n =
+ clist#append
+ [uri; if position then "MainConclusion" else "Conclusion"]
+ in
+ clist#set_row ~selectable:true n
+ ) can
+ ) ;
+ clist#columns_autosize () ;
+ ignore
+ (clist#connect#select_row
+ (fun ~row ~column ~event ->
+ user_constraints := (List.nth can row)::!user_constraints)) ;
+ ignore
+ (clist#connect#unselect_row
+ (fun ~row ~column ~event ->
+ user_constraints :=
+ List.filter
+ (function uri -> uri != (List.nth can row)) !user_constraints)) ;
+ in
+ let hbox =
+ GPack.hbox ~packing:(vbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let okb =
+ GButton.button ~label:"Ok"
+ ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ let cancelb =
+ GButton.button ~label:"Abort"
+ ~packing:(hbox#pack ~expand:false ~fill:false ~padding:5) () in
+ (* actions *)
+ ignore (window#connect#destroy GMain.Main.quit) ;
+ ignore (cancelb#connect#clicked window#destroy) ;
+ ignore
+ (okb#connect#clicked
+ (function () -> chosen := Some notebook#current_page ; window#destroy ())) ;
+ window#set_position `CENTER ;
+ window#show () ;
+ GMain.Main.main () ;
+ match !chosen with
+ None -> raise NoChoice
+ | Some n ->
+ if n = List.length list_of_must then
+ (* user provided constraints *)
+ !user_constraints
+ else
+ List.nth list_of_must n
+;;
+