AutoUV Segmenting was rewritten the AutoUV state

When a user opened multiple AutoUV Segmenting windows, each window kept its
state (#st{}) frozen at the moment it was created. After completing the
segmentation process in one window and activating the AutoUV Editor, if the
user switched to another segmenting window, the Geometry window would show
that the previously segmented object had lost its segmentation.

Note:
- Fixed an issue with multiple AutoUV Segmenting window erasing the
  previous segmentation. Thanks to Arclite.

Author: Micheus

plugins_src/autouv/auv_seg_ui.erl

@@ -205,6 +205,11 @@ seg_event_5(Ev, #seg{st=St0}=Ss) ->
 seg_event_6({new_state,St}, Ss) ->
     get_seg_event(Ss#seg{st=St});
 
+seg_event_6({new_orig_state,{Id,#st{shapes=Shp1,mat=TMat}}}, #seg{orig_st=#st{shapes=Shp0}=St}=Ss) ->
+    We = gb_trees:get(Id,Shp1),
+    Shp = gb_trees:enter(Id,We,Shp0),
+    get_seg_event(Ss#seg{orig_st=St#st{shapes=Shp,mat=TMat}});
+
 seg_event_6({action,{view,Cmd}}, #seg{st=St0}=Ss) ->
     case Cmd of
     aim -> 

plugins_src/autouv/wpc_autouv.erl

@@ -283,6 +283,7 @@ init_show_maps(Charts0, Fs, #we{name=WeName,id=Id}, GeomSt0) ->
     case wings_wm:is_window(EditWin) of
 	true ->
 	    wings_wm:send(EditWin, {add_faces,Fs,GeomSt}),
+	    update_all_seg_ui(all, Id, GeomSt),
 	    wings_wm:send(geom, {new_state,GeomSt});
 	false ->
 	    %% we are going to ensure to open the AutoUV window in the same
@@ -293,6 +294,7 @@ init_show_maps(Charts0, Fs, #we{name=WeName,id=Id}, GeomSt0) ->
 	    Pos = wxWindow:clientToScreen(SegWin,X0,Y0),
 	    Win = create_window({edit,Fs}, EditWin, Id, GeomSt),
 	    wxWindow:move(Win,Pos),
+	    update_all_seg_ui(SegWin, Id, GeomSt),
 	    wings_wm:send(geom, {new_state,GeomSt})
     end,
     GeomSt.
@@ -481,6 +483,7 @@ update_selected_uvcoords(#st{bb=Uvs}=St) ->
     We = update_uvs(Charts, We0),    
     Shs = gb_trees:update(Id, We, Shs0),
     GeomSt = GeomSt0#st{shapes=Shs},
+    update_all_seg_ui(all, Id, GeomSt),
     wings_wm:send(geom, {new_state,GeomSt}),
     clear_temp_sel(St#st{bb=Uvs#uvstate{st=GeomSt}}).
 
@@ -2829,3 +2832,20 @@ camera_reset() ->
                                      distance=Dist,
                                      pan_x=0.0,pan_y=0.0,
                                      along_axis=none}).
+
+%% When multiple 'AutoUV Segmenting' windows are open, this function ensures that all of them
+%% keep their #ss.orig_st field updated with the latest UV state. This prevents the field from
+%% being overridden when concluding a new segmentation, which previously caused users to lose
+%% the work they had already done in an active 'AutoUV Edit' window.
+update_all_seg_ui(SegWin, Id, St) ->
+    All = wings_wm:windows(),
+    Filter = fun(Name) when Name =:= SegWin -> false;
+                ({autouv,{segment,_}}) -> true;
+                (_) -> false
+             end,
+    case lists:filter(Filter, All) of
+        [] ->
+            ok;
+        SegAuv0 ->
+            [wings_wm:send(Name,{new_orig_state,{Id,St}}) || Name <- SegAuv0]
+    end.