From 54d8957bfeb6f5aac9dacd816af1436198942448 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Mon, 11 Jan 2016 11:00:07 +0000
Subject: [PATCH] Only advise to Edit -> Undo if undo stack is not empty.

---
 src/generate.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/generate.cpp b/src/generate.cpp
index 50ebedca..53cca0b3 100644
--- a/src/generate.cpp
+++ b/src/generate.cpp
@@ -330,11 +330,12 @@ void SolveSpaceUI::GenerateAll(int first, int last, bool andFindFree) {
                     "These include: \n"
                     "     %d request%s\n"
                     "     %d constraint%s\n"
-                    "     %d group%s\n\n"
-                    "Choose Edit -> Undo to undelete all elements.",
+                    "     %d group%s"
+                    "%s",
                        deleted.requests, deleted.requests == 1 ? "" : "s",
                        deleted.constraints, deleted.constraints == 1 ? "" : "s",
-                       deleted.groups, deleted.groups == 1 ? "" : "s");
+                       deleted.groups, deleted.groups == 1 ? "" : "s",
+                       undo.cnt > 0 ? "\n\nChoose Edit -> Undo to undelete all elements." : "");
         }
 
         deleted = {};