Reordered scene reload to prevent race conditions.

Also extended progress status bar to support status value -1 for pulsing.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/slic3r/GUI/ProgressStatusBar.cpp b/src/slic3r/GUI/ProgressStatusBar.cpp
index 44a7b06c5..93ab3feb9 100644
--- a/src/slic3r/GUI/ProgressStatusBar.cpp
+++ b/src/slic3r/GUI/ProgressStatusBar.cpp
@@ -75,7 +75,11 @@ void ProgressStatusBar::set_progress(int val)
     if(val == m_prog->GetRange()) {
         m_prog->SetValue(0);
         show_progress(false);
-    } else {
+    }
+    else if(val < 0) {
+        m_prog->Pulse();
+    }
+    else {
         m_prog->SetValue(val);
     }
 }