From 31f213d6ca8de9e450bf399daa044a2704ec6f3e Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Fri, 17 Feb 2017 15:00:01 +0100
Subject: [PATCH] Hopefully fixes "Export G-Code" Disabled After First Export"
 https://github.com/prusa3d/Slic3r/issues/137

---
 lib/Slic3r/GUI/Plater.pm | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index b0d6130fc..8d7c96a77 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -1787,12 +1787,10 @@ sub object_list_changed {
         $self->{"btn_layer_editing"}->Disable if (! $self->{config}->variable_layer_height);
     }
 
-    if ($self->{export_gcode_output_file} || $self->{send_gcode_file}) {
-        $self->{btn_reslice}->Disable;
-        $self->{btn_export_gcode}->Disable;
-        $self->{btn_print}->Disable;
-        $self->{btn_send_gcode}->Disable;
-    }
+    my $export_in_progress = $self->{export_gcode_output_file} || $self->{send_gcode_file};
+    my $method = ($have_objects && ! $export_in_progress) ? 'Enable' : 'Disable';
+    $self->{"btn_$_"}->$method
+        for grep $self->{"btn_$_"}, qw(reslice export_gcode print send_gcode);
 }
 
 sub selection_changed {