From 6780e74521111e4e08d8f3fdefab684f3e3e445b Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Tue, 13 Aug 2019 14:56:02 +0200
Subject: [PATCH] Update 3D-scene after filament's color change

---
 src/slic3r/GUI/Tab.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 4afd3a116..22c5a548a 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1621,6 +1621,24 @@ void TabFilament::build()
         optgroup->append_single_option_line("filament_density");
         optgroup->append_single_option_line("filament_cost");
 
+        optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value) {
+            this->update_dirty();
+            this->on_value_change(opt_key, value);
+
+            if (opt_key == "filament_colour")
+            {
+                const Preset& printer_preset = m_preset_bundle->printers.get_edited_preset();
+                const std::vector<std::string>& colors = static_cast<const ConfigOptionStrings*>(
+                                                         printer_preset.config.option("extruder_colour"))->values;
+                for (const std::string& color : colors)
+                    if (color.empty()) {
+                        // update scene
+                        wxGetApp().plater()->update();
+                        break;
+                    }
+            }
+        };
+
         optgroup = page->new_optgroup(_(L("Temperature")) + wxString(" °C", wxConvUTF8));
         Line line = { _(L("Extruder")), "" };
         line.append_option(optgroup->get_option("first_layer_temperature"));