From 284355d3786d80687a37067d1083d6f70963aa5f Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Mon, 16 Sep 2019 10:22:26 +0200
Subject: [PATCH] Fix of #2878 (endless warning loop in configuration update)

---
 src/slic3r/GUI/GUI_ObjectSettings.cpp | 31 +++++++++++++++++++++++++++
 src/slic3r/GUI/GUI_ObjectSettings.hpp |  5 +++++
 2 files changed, 36 insertions(+)

diff --git a/src/slic3r/GUI/GUI_ObjectSettings.cpp b/src/slic3r/GUI/GUI_ObjectSettings.cpp
index 0c10c5460c..adb5496178 100644
--- a/src/slic3r/GUI/GUI_ObjectSettings.cpp
+++ b/src/slic3r/GUI/GUI_ObjectSettings.cpp
@@ -168,6 +168,23 @@ bool ObjectSettings::update_settings_list()
     return true;
 }
 
+bool ObjectSettings::add_missed_options(DynamicPrintConfig* config_to, const DynamicPrintConfig& config_from)
+{
+    bool is_added = false;
+    if (wxGetApp().plater()->printer_technology() == ptFFF)
+    {
+        if (config_to->has("fill_density") && !config_to->has("fill_pattern"))
+        {
+            if (config_from.option<ConfigOptionPercent>("fill_density")->value == 100) {
+                config_to->set_key_value("fill_pattern", config_from.option("fill_pattern")->clone());
+                is_added = true;
+            }
+        }
+    }
+
+    return is_added;
+}
+
 void ObjectSettings::update_config_values(DynamicPrintConfig* config)
 {
     const auto objects_model        = wxGetApp().obj_list()->GetModel();
@@ -185,6 +202,12 @@ void ObjectSettings::update_config_values(DynamicPrintConfig* config)
 
     auto load_config = [this, config, &main_config]()
     {
+        /* Additional check for overrided options.
+         * There is a case, when some options should to be added, 
+         * to avoid check loop in the next configuration update
+         */
+        bool is_added = add_missed_options(config, main_config);
+
         // load checked values from main_config to config
         config->apply_only(main_config, config->keys(), true);
         // Initialize UI components with the config values.
@@ -192,6 +215,14 @@ void ObjectSettings::update_config_values(DynamicPrintConfig* config)
             og->reload_config();
         // next config check
         update_config_values(config);
+
+        if (is_added) {
+            wxTheApp->CallAfter([this]() {
+                wxWindowUpdateLocker noUpdates(m_parent);
+                update_settings_list();
+                m_parent->Layout();
+            });
+        }
     };
 
     auto get_field = [this](const t_config_option_key & opt_key, int opt_index)
diff --git a/src/slic3r/GUI/GUI_ObjectSettings.hpp b/src/slic3r/GUI/GUI_ObjectSettings.hpp
index a5724811a9..ff187eddcf 100644
--- a/src/slic3r/GUI/GUI_ObjectSettings.hpp
+++ b/src/slic3r/GUI/GUI_ObjectSettings.hpp
@@ -48,6 +48,11 @@ public:
     ~ObjectSettings() {}
 
     bool        update_settings_list();
+    /* Additional check for override options: Add options, if its needed.
+     * Example: if Infill is set to 100%, and Fill Pattern is missed in config_to,
+     * we should add fill_pattern to avoid endless loop in update
+     */
+    bool        add_missed_options(DynamicPrintConfig *config_to, const DynamicPrintConfig &config_from);
     void        update_config_values(DynamicPrintConfig*config);
     void        UpdateAndShow(const bool show) override;
     void        msw_rescale();