Index: trunk/src/data.c
===================================================================
--- trunk/src/data.c	(revision 21811)
+++ trunk/src/data.c	(revision 21812)
@@ -799,7 +799,7 @@
 #include "obj_arc_draw.h"
 #include "obj_line_draw.h"
 #include "conf_core.h"
-unsigned long pcb_data_clear_obj_flag(pcb_data_t *data, pcb_objtype_t tmask, unsigned long flag, int redraw)
+unsigned long pcb_data_clear_obj_flag(pcb_data_t *data, pcb_objtype_t tmask, unsigned long flag, int redraw, int undoable)
 {
 	pcb_rtree_it_t it;
 	pcb_box_t *n;
@@ -815,6 +815,8 @@
 				PCB_FLAG_CLEAR(flag, (pcb_any_obj_t *)n);
 				if (redraw)
 					pcb_pstk_invalidate_draw((pcb_pstk_t *)n);
+				if (undoable)
+					pcb_undo_add_obj_to_flag((pcb_any_obj_t *)n);
 				cnt++;
 			}
 		}
@@ -833,6 +835,8 @@
 					PCB_FLAG_CLEAR(flag, (pcb_any_obj_t *)n);
 					if (redraw)
 						pcb_line_invalidate_draw(l, (pcb_line_t *)n);
+					if (undoable)
+						pcb_undo_add_obj_to_flag((pcb_any_obj_t *)n);
 					cnt++;
 				}
 			}
@@ -845,6 +849,8 @@
 					PCB_FLAG_CLEAR(flag, (pcb_any_obj_t *)n);
 					if (redraw)
 						pcb_arc_invalidate_draw(l, (pcb_arc_t *)n);
+					if (undoable)
+						pcb_undo_add_obj_to_flag((pcb_any_obj_t *)n);
 					cnt++;
 				}
 			}
@@ -857,6 +863,8 @@
 					PCB_FLAG_CLEAR(flag, (pcb_any_obj_t *)n);
 					if (redraw)
 						pcb_poly_invalidate_draw(l, (pcb_poly_t *)n);
+					if (undoable)
+						pcb_undo_add_obj_to_flag((pcb_any_obj_t *)n);
 					cnt++;
 				}
 			}
@@ -869,6 +877,8 @@
 					PCB_FLAG_CLEAR(flag, (pcb_any_obj_t *)n);
 					if (redraw)
 						pcb_text_invalidate_draw(l, (pcb_text_t *)n);
+					if (undoable)
+						pcb_undo_add_obj_to_flag((pcb_any_obj_t *)n);
 					cnt++;
 				}
 			}
@@ -878,9 +888,9 @@
 	return cnt;
 }
 
-unsigned long pcb_data_clear_flag(pcb_data_t *data, unsigned long flag, int redraw)
+unsigned long pcb_data_clear_flag(pcb_data_t *data, unsigned long flag, int redraw, int undoable)
 {
-	return pcb_data_clear_obj_flag(data, PCB_OBJ_CLASS_REAL, flag, redraw);
+	return pcb_data_clear_obj_flag(data, PCB_OBJ_CLASS_REAL, flag, redraw, undoable);
 }
 
 
Index: trunk/src/data.h
===================================================================
--- trunk/src/data.h	(revision 21811)
+++ trunk/src/data.h	(revision 21812)
@@ -217,9 +217,11 @@
 void pcb_data_flag_change(pcb_data_t *data, pcb_objtype_t mask, int how, unsigned long flags);
 
 /* Clear specific static flag from all objects, optionally with matching
-   object types only. Returns number of object changed. */
-unsigned long pcb_data_clear_obj_flag(pcb_data_t *data, pcb_objtype_t tmask, unsigned long flag, int redraw);
-unsigned long pcb_data_clear_flag(pcb_data_t *data, unsigned long flag, int redraw);
+   object types only. If redraw is not 0, issue an object redraw on change.
+   If undoable is not 0, add flag changes to the undo list. Returns number
+   of object changed. */
+unsigned long pcb_data_clear_obj_flag(pcb_data_t *data, pcb_objtype_t tmask, unsigned long flag, int redraw, int undoable);
+unsigned long pcb_data_clear_flag(pcb_data_t *data, unsigned long flag, int redraw, int undoable);
 
 /* Clear the given dyflag bit from all objects under data */
 void pcb_data_dynflag_clear(pcb_data_t *data, pcb_dynf_t dynf);
Index: trunk/src/rats_act.c
===================================================================
--- trunk/src/rats_act.c	(revision 21811)
+++ trunk/src/rats_act.c	(revision 21812)
@@ -65,7 +65,7 @@
 	PCB_ACT_CONVARG(1, FGW_KEYWORD, AddRats, op = fgw_keyword(&argv[1]));
 
 	if (conf_core.temp.rat_warn) {
-		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1);
+		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1, 0);
 		pcb_draw();
 	}
 	switch (op) {
@@ -178,7 +178,7 @@
 	PCB_ACT_CONVARG(1, FGW_KEYWORD, DeleteRats, op = fgw_keyword(&argv[1]));
 
 	if (conf_core.temp.rat_warn) {
-		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1);
+		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1, 0);
 		pcb_draw();
 	}
 	switch(op) {
Index: trunk/src/tool.c
===================================================================
--- trunk/src/tool.c	(revision 21811)
+++ trunk/src/tool.c	(revision 21812)
@@ -414,7 +414,7 @@
 		return;
 
 	if (conf_core.temp.rat_warn)
-		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1);
+		pcb_data_clear_flag(PCB->Data, PCB_FLAG_WARN, 1, 0);
 	pcb_tool_notify_mode();
 	pcb_draw();
 }