From 61331ce1132ed77a510785c2c697d4177c873089 Mon Sep 17 00:00:00 2001
From: Noisyfox <timemanager.rick@gmail.com>
Date: Wed, 22 Jan 2025 10:02:57 +0800
Subject: [PATCH] Fix extruder number issue when SEMM is not enabled (#8027)

* Revert ac80575b28901a46468920cf1707213de4c86d22

* Fix issue that extruder number is not initialized properly when SEMM is not enabled
---
 src/libslic3r/Preset.cpp | 24 +++++++++++++++++-------
 src/slic3r/GUI/Tab.cpp   |  5 ++---
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 1906013cbd..cfc777c8cc 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -318,17 +318,27 @@ std::string Preset::remove_suffix_modified(const std::string &name)
 // Update new extruder fields at the printer profile.
 void Preset::normalize(DynamicPrintConfig &config)
 {
-    // BBS
-    auto* filament_diameter = dynamic_cast<const ConfigOptionFloats*>(config.option("filament_diameter"));
-    if (filament_diameter != nullptr)
-        // Loaded the FFF Printer settings. Verify, that all extruder dependent values have enough values.
-        config.set_num_filaments((unsigned int)filament_diameter->values.size());
+    size_t n = 1;
+    if (config.option("single_extruder_multi_material") == nullptr || config.opt_bool("single_extruder_multi_material")) {
+        // BBS
+        auto* filament_diameter = dynamic_cast<const ConfigOptionFloats*>(config.option("filament_diameter"));
+        if (filament_diameter != nullptr) {
+            n = filament_diameter->values.size();
+            // Loaded the FFF Printer settings. Verify, that all extruder dependent values have enough values.
+            config.set_num_filaments((unsigned int) n);
+        }
+    } else {
+        auto* nozzle_diameter = dynamic_cast<const ConfigOptionFloats*>(config.option("nozzle_diameter"));
+        if (nozzle_diameter != nullptr) {
+            n = nozzle_diameter->values.size();
+            // Loaded the FFF Printer settings. Verify, that all extruder dependent values have enough values.
+            config.set_num_extruders((unsigned int) n);
+        }
+    }
 
     if (config.option("filament_diameter") != nullptr) {
         // This config contains single or multiple filament presets.
         // Ensure that the filament preset vector options contain the correct number of values.
-        // BBS
-        size_t n = (filament_diameter == nullptr) ? 1 : filament_diameter->values.size();
         const auto &defaults = FullPrintConfig::defaults();
         for (const std::string &key : Preset::filament_options()) {
             if (key == "compatible_prints" || key == "compatible_printers")
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 6ef7e30b34..7ec6d1b976 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -5118,13 +5118,12 @@ bool Tab::select_preset(std::string preset_name, bool delete_current /*=false*/,
         apply_config_from_cache();
 
         // Orca: update presets for the selected printer
-        load_current_preset();
-
         if (m_type == Preset::TYPE_PRINTER && wxGetApp().app_config->get_bool("remember_printer_config")) {
             m_preset_bundle->update_selections(*wxGetApp().app_config);
             wxGetApp().plater()->sidebar().on_filaments_change(m_preset_bundle->filament_presets.size());
         }
-        
+        load_current_preset();
+
 
         if (delete_third_printer) {
             wxGetApp().CallAfter([filament_presets, process_presets]() {