Keep GLCanvas3D Building With SLIC3R_CAD Off

The bed-axes toggle added for the Design tab's reference planes reads
m_design_sketch_tool, which only exists under SLIC3R_CAD. Compute the
flag once and read the sketch tool inside the same guard as its other
uses.

.claude/skills/orca-profiles/references/extruder-variants.md

@@ -105,11 +105,12 @@ Rules:
    `single_extruder_multi_material` off, and in the app when the printer tab loads a printer with a
    different number of extruders, the pair is rebuilt from `extruder_variant_list` (one
    `Direct Drive Standard` per extruder when the list is absent) and the variant arrays are resized to
-   the rebuilt pair, padded with their first value or cut. The resize skips the `machine_max_*` limits
-   and `hotend_heating_rate` / `hotend_cooling_rate`: they keep their width, and an extruder beyond it
-   reads their first value, so extruder 2 and up of a list-less printer take extruder 1's normal limit
-   as their silent one too. With the three in agreement that changes nothing; a pair written without
-   the list is replaced. A listed variant the pair lacks is a menu choice that reads variant index 0.
+   the rebuilt pair, padded with their first value or cut. The `machine_max_*` limits are padded the
+   same way, so extruder 2 and up of a list-less printer take extruder 1's normal limit as their
+   silent one too. The resize skips `hotend_heating_rate` / `hotend_cooling_rate`: they keep their
+   width, and an extruder beyond it reads their first value. With the three in agreement that changes
+   nothing; a pair written without the list is replaced. A listed variant the pair lacks is a menu
+   choice that reads variant index 0.
    - The pair without `extruder_variant_list` slices, but the sidebar offers no variant switch and
      the app cannot add variants to a list-less process: nothing is lost while every extruder
      has exactly one variant, and every further variant is unreachable.

AGENTS.md

@@ -4,15 +4,17 @@ OrcaSlicer — open-source C++17 3D slicer. wxWidgets GUI, CMake build system.
 
 ## Build Commands
 
+Build the Release configuration unless asked otherwise.
+
 ```bash
 # macOS
-cmake --build build/arm64 --config RelWithDebInfo --target all --
+cmake --build build/arm64 --config Release --target all --
 
 # Linux
-cmake --build build --config RelWithDebInfo --target all --
+cmake --build build --config Release --target all --
 
-# Windows (replace %build_type% with Debug/Release/RelWithDebInfo)
-cmake --build . --config %build_type% --target ALL_BUILD -- -m
+# Windows
+cmake --build . --config Release --target ALL_BUILD -- -m
 ```
 
 ## Testing

resources/web/guide/21/common.js

@@ -311,7 +311,7 @@ function CreatePrinterBlock(OneModel)
 
 	return	'<div class="PrinterBlock" onClick="ChooseModel(\''+vendor+'\',\''+OneModel['model']+'\')">'+
 			'	<div class="PImg">'+
-			'		<img class="ModelThumbnail" src="' + OneModel['cover'] + '" />'+
+			'		<img class="ModelThumbnail" src="' + OneModel['cover'] + '" onerror="this.onerror=null;this.src=\'../img/printer-dummy.png\';"/>'+
 			'	</div>'+
 			'	<div class="PrinterInfoMark">?</div>'+
 			'	<div class="PrinterInfo">'+

scripts/appimage_lib_policy.sh

@@ -23,7 +23,13 @@ appimage_is_host_library() {
 }
 
 appimage_is_elf_file() {
-    file -b "$1" 2>/dev/null | grep -q '^ELF '
+    # Read the four-byte ELF magic rather than asking file(1): this runs once per candidate, and an
+    # AppDir holds thousands of them (the bundled Python runtime alone is ~5k files, none of them
+    # ELF). Two processes per call made this ~14 s of a ~95 s image build on its own.
+    local magic
+    [[ -f "$1" && -r "$1" ]] || return 1
+    IFS= read -r -n 4 -d '' magic < "$1" 2>/dev/null
+    [[ $magic == $'\177ELF' ]]
 }
 
 appimage_list_direct_dependencies() {

scripts/disable_validation.entitlements

@@ -4,5 +4,10 @@
 <dict>
     <key>com.apple.security.cs.disable-library-validation</key>
     <true/>
+    <!-- The Bambu network plug-in's code protector rewrites one of its own signed code pages
+         after loading. Under the hardened runtime macOS kills the process when that page is
+         paged back in; this lets it run, as Bambu Studio's signature does. -->
+    <key>com.apple.security.cs.allow-unsigned-executable-memory</key>
+    <true/>
 </dict>
 </plist>

src/OrcaSlicer.cpp

@@ -3618,6 +3618,9 @@ int CLI::run(int argc, char **argv)
                 {
                     if (opt_key == "compatible_prints" || opt_key == "compatible_printers" || opt_key == "model_id" || opt_key == "dev_model_name" || opt_key == "filament_settings_id")
                         continue;
+                    // rebuilt from every filament after this loop
+                    if (filament_dev_options.find(opt_key) != filament_dev_options.end())
+                        continue;
                     ConfigOption *opt = m_print_config.option(opt_key, true);
                     if (opt == nullptr) {
                         // opt_key does not exist in this ConfigBase and it cannot be created, because it is not defined by this->def().
@@ -3681,6 +3684,14 @@ int CLI::run(int argc, char **argv)
             }
         }
 
+        // The stored values cannot be told apart per filament, so they are kept as they are unless every slot has a config.
+        std::vector<const DynamicPrintConfig *> filament_configs(filament_count, nullptr);
+        for (size_t index = 0; index < load_filaments_config.size(); index++)
+            if (load_filaments_index[index] >= 1 && load_filaments_index[index] <= filament_count)
+                filament_configs[load_filaments_index[index] - 1] = &load_filaments_config[index];
+        if (std::find(filament_configs.begin(), filament_configs.end(), nullptr) == filament_configs.end())
+            set_filament_dev_options(m_print_config, filament_configs);
+
         if (m_print_config.option<ConfigOptionStrings>("filament_extruder_variant")) {
             std::vector<int>& filament_self_indice = m_print_config.option<ConfigOptionInts>("filament_self_index", true)->values;
             int index_size = m_print_config.option<ConfigOptionStrings>("filament_extruder_variant")->size();

src/dev-utils/platform/osx/entitlements.plist

@@ -5,5 +5,10 @@
   <!-- for dynamic loading of libraries without signature validation. Used for 3dconnection drivers.-->
   <key>com.apple.security.cs.disable-library-validation</key>  
   <true/>
+  <!-- The Bambu network plug-in's code protector rewrites one of its own signed code pages
+       after loading. Under the hardened runtime macOS kills the process when that page is
+       paged back in; this lets it run, as Bambu Studio's signature does. -->
+  <key>com.apple.security.cs.allow-unsigned-executable-memory</key>
+  <true/>
 </dict>
 </plist>

src/dev-utils/platform/unix/build_linux_image.sh.in

@@ -118,9 +118,13 @@ bundle_dependency_closure() {
     # (scripts/check_appimage_libs.sh).
     local -a search_dirs=("$dst_dir")
 
-    while [ ${#queue[@]} -gt 0 ]; do
-        target="${queue[0]}"
-        queue=("${queue[@]:1}")
+    # Walked with a read index rather than by reslicing the array: "${queue[@]:1}" rebuilds the whole
+    # queue on every pop, so draining it costs O(n^2). At the ~5k entries this bundle reaches that was
+    # ~22 s of the image build spent copying an array around.
+    local head=0
+    while [ "$head" -lt ${#queue[@]} ]; do
+        target="${queue[$head]}"
+        head=$((head + 1))
 
         if [ ! -e "$target" ] || ! appimage_is_elf_file "$target"; then
             continue

src/libslic3r/PrintConfig.cpp

@@ -10030,6 +10030,13 @@ static void extend_extruder_variant(DynamicPrintConfig& config, const unsigned i
             printer_extruder_variant_opt->values.insert(printer_extruder_variant_opt->values.end(), variants_list.begin(), variants_list.end());
         }
     }
+
+    // 3. Size the machine limits to the rebuilt variants, padded with their first value like the other variant keys.
+    // They are not extruder option keys, so the resize loop in set_num_extruders skips them.
+    const auto &defaults = FullPrintConfig::defaults();
+    for (const std::string &key : printer_options_with_variant_2)
+        if (auto *opt = config.option<ConfigOptionFloats>(key))
+            opt->resize(config.get_parameter_size(key, num_extruders), defaults.option(key));
 }
 
 void DynamicPrintConfig::set_num_extruders(unsigned int num_extruders)
@@ -10822,6 +10829,22 @@ void normalize_filament_values_to_variants(DynamicPrintConfig &config)
     }
 }
 
+void set_filament_dev_options(DynamicPrintConfig &config, const std::vector<const DynamicPrintConfig *> &filament_configs)
+{
+    for (const std::string &key : filament_dev_options) {
+        if (std::none_of(filament_configs.begin(), filament_configs.end(), [&key](const DynamicPrintConfig *filament) { return filament->has(key); }))
+            continue;
+        const ConfigOption *default_value = print_config_def.get(key)->default_value.get();
+        auto *dst = static_cast<ConfigOptionVectorBase *>(config.option(key, true));
+        dst->clear();
+        for (const DynamicPrintConfig *filament : filament_configs) {
+            const auto *src = static_cast<const ConfigOptionVectorBase *>(filament->has(key) ? filament->option(key) : default_value);
+            if (!src->empty())
+                dst->append(src);
+        }
+    }
+}
+
 
 //used for object/region config
 //use the smallest of multiple to single
@@ -11520,12 +11543,18 @@ void DynamicPrintConfig::update_non_diff_values_to_base_config(DynamicPrintConfi
     int cur_variant_count = cur_extruder_variants.size();
     int target_variant_count = target_extruder_variants.size();
 
+    // A base variant this config does not list (the base gained it after the config was saved, or the
+    // config lists none) takes this config's first variant of the same extruder, as a user preset's
+    // values do in update_diff_values_to_child_config. Left unmatched, the base's value would silently
+    // replace the user's.
     variant_index.resize(target_variant_count, -1);
     if (cur_variant_count == 0) {
         // Defensive: target_variant_count may be 0 if the preset doesn't carry extruder_variant_name.
         // In that case keep variant_index empty and let the downstream size checks produce a useful error.
         if (!variant_index.empty())
-            variant_index[0] = 0;
+            // This config's one value belongs to the extruder of the base's first variant.
+            variant_index = map_variant_indices(target_extruder_variants, target_extruder_ids, {},
+                                                target_extruder_ids.empty() ? std::vector<int>() : std::vector<int>{target_extruder_ids[0]});
     }
     else if ((cur_extruder_ids.size() > 0) && cur_variant_count != cur_extruder_ids.size()){
         //should not happen
@@ -11538,18 +11567,7 @@ void DynamicPrintConfig::update_non_diff_values_to_base_config(DynamicPrintConfi
              %extruder_variant_name %target_variant_count %extruder_id_name %target_extruder_ids.size();
     }
     else {
-        for (int i = 0; i < target_variant_count; i++)
-        {
-            for (int j = 0; j < cur_variant_count; j++)
-            {
-                if ((target_extruder_variants[i] == cur_extruder_variants[j])
-                    &&(target_extruder_ids.empty() || (target_extruder_ids[i] == cur_extruder_ids[j])))
-                {
-                    variant_index[i] = j;
-                    break;
-                }
-            }
-        }
+        variant_index = map_variant_indices(target_extruder_variants, target_extruder_ids, cur_extruder_variants, cur_extruder_ids);
     }
 
     for (auto& opt : keys) {
@@ -11574,6 +11592,13 @@ void DynamicPrintConfig::update_non_diff_values_to_base_config(DynamicPrintConfi
                     if (cur_variant_count > target_variant_count)
                         continue;
 
+                    // The variant lists are the base's layout itself, which every other value is
+                    // carried onto: a variant this config lacks keeps its own name and id.
+                    if (opt == extruder_id_name || opt == extruder_variant_name) {
+                        opt_src->set(opt_target);
+                        continue;
+                    }
+
                     int stride = 1;
                     if (key_set2.find(opt) != key_set2.end())
                         stride = 2;

src/libslic3r/PrintConfig.hpp

@@ -928,6 +928,11 @@ void normalize_filament_values_to_variants(DynamicPrintConfig &config);
 
 extern std::set<std::string> filament_dev_options;
 
+// Orca: a filament_dev_options option holds several values per filament, and how many is up to the
+// filament preset, so one filament's values cannot be replaced in place. This rebuilds each option from
+// filament_configs, one config per filament in slot order, as the filaments' values one after another.
+void set_filament_dev_options(DynamicPrintConfig &config, const std::vector<const DynamicPrintConfig *> &filament_configs);
+
 extern void update_static_print_config_from_dynamic(ConfigBase& config, const DynamicPrintConfig& dest_config, std::vector<int> variant_index, std::set<std::string>& key_set1, int stride = 1);
 extern void compute_filament_override_value(const std::string& opt_key, const ConfigOption *opt_old_machine, const ConfigOption *opt_new_machine, const ConfigOption *opt_new_filament, const DynamicPrintConfig& new_full_config,
     t_config_option_keys& diff_keys, DynamicPrintConfig& filament_overrides, std::vector<int>& f_map_indices);

src/slic3r/GUI/AMSMaterialsSetting.cpp

@@ -974,8 +974,8 @@ bool AMSMaterialsSetting::Show(bool show)
 
 static void _collect_filament_info(const wxString& shown_name,
                                    const Preset& filament,
-                                   unordered_map<wxString, wxString>& query_filament_vendors,
-                                   unordered_map<wxString, wxString>& query_filament_types)
+                                   std::unordered_map<wxString, wxString>& query_filament_vendors,
+                                   std::unordered_map<wxString, wxString>& query_filament_types)
 {
     query_filament_vendors[shown_name] = filament.config.get_filament_vendor();
     query_filament_types[shown_name] = filament.config.get_filament_type();

src/slic3r/GUI/Auxiliary.cpp

@@ -856,14 +856,14 @@ void AuxiliaryPanel::Split(const std::string &src, const std::string &separator,
     dest.clear();
     index = str.find_first_of(separator, start);
     do {
-        if (index != string::npos) {
+        if (index != std::string::npos) {
             substring = str.substr(start, index - start);
             dest.push_back(substring);
             start = index + separator.size();
             index = str.find(separator, start);
-            if (start == string::npos) break;
+            if (start == std::string::npos) break;
         }
-    } while (index != string::npos);
+    } while (index != std::string::npos);
 
     // the last part
     substring = str.substr(start);

src/slic3r/GUI/CalibrationWizardPresetPage.cpp

@@ -1307,7 +1307,7 @@ void CalibrationPresetPage::stripWhiteSpace(std::string& str)
 {
     if (str == "") { return; }
 
-    string::iterator cur_it;
+    std::string::iterator cur_it;
     cur_it = str.begin();
 
     while (cur_it != str.end()) {
@@ -2597,7 +2597,7 @@ void CalibrationPresetPage::update_multi_extruder_filament_combobox(const std::s
     int ams_id_int = 0;
     try {
         if (!ams_id.empty())
-            ams_id_int = stoi(ams_id.c_str());
+            ams_id_int = std::stoi(ams_id.c_str());
 
     } catch (...) {}
 
@@ -2685,7 +2685,7 @@ void CalibrationPresetPage::update_filament_combobox(std::string ams_id)
     int ams_id_int = 0;
     try {
         if (!ams_id.empty())
-            ams_id_int = stoi(ams_id.c_str());
+            ams_id_int = std::stoi(ams_id.c_str());
 
     } catch (...) {}
 

src/slic3r/GUI/CreatePresetsDialog.cpp

@@ -347,7 +347,7 @@ static std::string get_curr_timestmp()
     // return timestampString;
 }
 
-static void get_filament_compatible_printer(Preset* preset, vector<std::string>& printers)
+static void get_filament_compatible_printer(Preset* preset, std::vector<std::string>& printers)
 {
     auto compatible_printers = dynamic_cast<ConfigOptionStrings *>(preset->config.option("compatible_printers"));
     if (compatible_printers == nullptr) return;
@@ -1581,7 +1581,7 @@ void CreateFilamentPresetDialog::sort_printer_by_nozzle(std::vector<std::pair<st
 {
     std::unordered_map<std::string, float> nozzle_diameter = nozzle_diameter_map;
     std::sort(printer_name_to_filament_preset.begin(), printer_name_to_filament_preset.end(),
-              [&nozzle_diameter](const std::pair<string, T> &a, const std::pair<string, T> &b) {
+              [&nozzle_diameter](const std::pair<std::string, T> &a, const std::pair<std::string, T> &b) {
                   size_t nozzle_index_a = a.first.find(" nozzle");
                   size_t nozzle_index_b = b.first.find(" nozzle");
                   if (nozzle_index_a == std::string::npos || nozzle_index_b == std::string::npos) return a.first < b.first;
@@ -3143,7 +3143,7 @@ void CreatePrinterPresetDialog::set_current_visible_printer()
 
 wxArrayString CreatePrinterPresetDialog::printer_preset_sort_with_nozzle_diameter(const VendorProfile &vendor_profile, float nozzle_diameter)
 {
-    std::vector<pair<float, std::string>> preset_sort;
+    std::vector<std::pair<float, std::string>> preset_sort;
 
     auto get_nozzle_size_for_printer_model = [this](const std::string & model_name) -> size_t {
         auto iter = m_printer_name_to_preset.find(model_name);
@@ -4964,7 +4964,7 @@ wxBoxSizer *CreatePresetForPrinterDialog::create_selected_filament_preset_sizer(
 
     m_selected_printer->Bind(wxEVT_COMBOBOX, [this](wxCommandEvent &e) {
         wxString printer_name = m_selected_printer->GetStringSelection();
-        std::unordered_map<string, std::vector<std::shared_ptr<Preset>>>::iterator filament_iter = m_printer_compatible_filament_presets.find(into_u8(printer_name));
+        std::unordered_map<std::string, std::vector<std::shared_ptr<Preset>>>::iterator filament_iter = m_printer_compatible_filament_presets.find(into_u8(printer_name));
         if (m_printer_compatible_filament_presets.end() != filament_iter) {
             filament_choice_to_filament_preset.clear();
             wxArrayString filament_choices;

src/slic3r/GUI/DeviceCore/DevFilaSystem.cpp

@@ -160,7 +160,7 @@ DevAms::~DevAms()
     m_trays.clear();
 }
 
-static unordered_map<int, wxString> s_ams_display_formats = {
+static std::unordered_map<int, wxString> s_ams_display_formats = {
     {DevAms::AMS,      "AMS-%d"},
     {DevAms::AMS_LITE, "AMS Lite-%d"},
     {DevAms::N3F,      "AMS 2 PRO-%d"},

src/slic3r/GUI/DeviceCore/DevMappingNozzle.cpp

@@ -250,7 +250,7 @@ int DevNozzleMappingCtrl::CtrlGetAutoNozzleMappingV1(Slic3r::GUI::Plater* plater
 
 void DevNozzleMappingCtrl::ParseAutoNozzleMapping(const json& print_jj)
 {
-    if (print_jj.contains("command") && print_jj["command"].get<string>() == "get_auto_nozzle_mapping") {
+    if (print_jj.contains("command") && print_jj["command"].get<std::string>() == "get_auto_nozzle_mapping") {
         if (print_jj.contains("sequence_id") && print_jj["sequence_id"] == m_sequence_id) {
             Clear();
             DevJsonValParser::ParseVal(print_jj, "result", m_result);

src/slic3r/GUI/DeviceCore/DevNozzleSystem.cpp

@@ -426,7 +426,7 @@ void DevNozzleSystem::ClearNozzles()
 
 // ---- parsing ----------------------------------------------------------------------------------------
 
-static unordered_map<string, NozzleFlowType> _str2_nozzle_flow_type = {
+static std::unordered_map<std::string, NozzleFlowType> _str2_nozzle_flow_type = {
     {"S", NozzleFlowType::S_FLOW},
     {"H", NozzleFlowType::H_FLOW},
     {"A", NozzleFlowType::S_FLOW},
@@ -436,7 +436,7 @@ static unordered_map<string, NozzleFlowType> _str2_nozzle_flow_type = {
     {"B", NozzleFlowType::E_FLOW}, // E3D High Flow -> nvtE3DHighFlow
 };
 
-static unordered_map<string, NozzleType> _str2_nozzle_type = {
+static std::unordered_map<std::string, NozzleType> _str2_nozzle_type = {
     {"00", NozzleType::ntStainlessSteel},
     {"01", NozzleType::ntHardenedSteel},
     {"05", NozzleType::ntTungstenCarbide}

src/slic3r/GUI/DeviceErrorDialog.cpp

@@ -368,7 +368,7 @@ wxString DeviceErrorDialog::parse_error_level(int error_code)
     }
 }
 
-static const std::unordered_set<string> s_jump_liveview_error_codes = { "0300-8003", "0300-8002", "0300-800A"};
+static const std::unordered_set<std::string> s_jump_liveview_error_codes = { "0300-8003", "0300-8002", "0300-800A"};
 wxString DeviceErrorDialog::show_error_code(int error_code)
 {
     if (m_error_code == error_code) { return wxEmptyString;}

src/slic3r/GUI/DeviceManager.cpp

@@ -110,6 +110,7 @@ using json = nlohmann::json;
 class wxWindow;
 
 namespace fs = boost::filesystem;
+using namespace std::chrono_literals;
 
 #define CALI_DEBUG
 #define MINUTE_30 1800000    //ms
@@ -3103,7 +3104,7 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
                         DevFirmwareVersionInfo ver_info;
                         ver_info.name = (*it)["name"].get<std::string>();
                         if ((*it).contains("product_name"))
-                            ver_info.product_name = wxString::FromUTF8((*it)["product_name"].get<string>());
+                            ver_info.product_name = wxString::FromUTF8((*it)["product_name"].get<std::string>());
                         if ((*it).contains("sw_ver"))
                             ver_info.sw_ver = (*it)["sw_ver"].get<std::string>();
                         if ((*it).contains("sw_new_ver"))

src/slic3r/GUI/EditGCodeDialog.cpp

@@ -294,8 +294,8 @@ wxDataViewItem EditGCodeDialog::add_presets_placeholders()
 
 
     // Orca: create subgroups from the pages of the tabs
-    auto init_from_tab = [this, full_config](wxDataViewItem parent, Tab* tab, const set<string>& preset_keys){
-        set extra_keys(preset_keys);
+    auto init_from_tab = [this, full_config](wxDataViewItem parent, Tab* tab, const std::set<std::string>& preset_keys){
+        std::set extra_keys(preset_keys);
         for (const auto& page : tab->m_pages) {
             // ORCA: Pull icons from tabs for subgroups, icons are hidden on tabs
             std::string icon_name = "empty"; // use empty icon if not defined
@@ -549,7 +549,7 @@ void ParamsNode::RefreshSearch(const wxString& search_text)
 
     if (GetEnabledChildren().empty())
         if (auto pos = text.find(search_text); IsParamNode() && pos != wxString::npos) {
-            m_highlight_index = make_unique<pair<int, int>>(pos, search_text.Len());
+            m_highlight_index = make_unique<std::pair<int, int>>(pos, search_text.Len());
             Enable();
         } else {
             Disable();

src/slic3r/GUI/Field.cpp

@@ -702,11 +702,11 @@ void Field::get_value_by_opt_type(wxString& str, const bool check_value/* = true
                 set_value(str, true);
             }
         } else if (m_opt.opt_key == "sparse_infill_rotate_template" || m_opt.opt_key == "solid_infill_rotate_template") {
-            string ustr(str.utf8_string());
+            std::string ustr(str.utf8_string());
             if (!ConfigOptionFloats::validate_string(ustr)) {
-                string      v;
+                std::string v;
                 std::smatch match;
-                string      ps = (m_opt.opt_key == "sparse_infill_rotate_template") ?
+                std::string ps = (m_opt.opt_key == "sparse_infill_rotate_template") ?
                                      u8"[BT][!]?|[#][\\d]+[!]?|[+\\-]?[\\d.]+[%]?[*]?[\\d]*[/NnZz$LlUuQq~^|#]?[+\\-]?[\\d.]*[%#\'\"cm]?[m]?[BT]?[!*]?" :
                                      u8"[#][\\d]+[!]?|[+\\-]?[\\d.]+[%]?[*]?[\\d]*[/NnZz$LlUuQq~^|#]?[+\\-]?[\\d.]*[%#\'\"cm]?[m]?[!*]?";
 
@@ -729,7 +729,7 @@ void Field::get_value_by_opt_type(wxString& str, const bool check_value/* = true
             }
             break;
         } else if (m_opt.opt_key == "extra_solid_infills") {
-            string ustr(str.utf8_string());
+            std::string ustr(str.utf8_string());
             // New rule: accept either interval form (N or N#K) or explicit list (e.g. 1,7,9), with optional quotes.
             const std::regex rx_interval(u8R"(^\s*['"]?\s*\d+\s*(?:#\s*\d*)?\s*['"]?\s*$)");
             // List entries may be plain numbers or number with optional #K count, e.g., 5, 9#2, 18

src/slic3r/GUI/GCodeViewer.cpp

@@ -94,6 +94,8 @@
 #include "slic3r/GUI/Gizmos/GizmoObjectManipulation.hpp"
 #include "slic3r/GUI/PartPlate.hpp"
 
+using namespace std::string_view_literals;
+
 namespace Slic3r { class PrintBase; }
 
 
@@ -3184,7 +3186,7 @@ void GCodeViewer::render_legend_color_arr_recommen(float window_padding)
     float ams_item_height = 0;
     float filament_group_item_align_width = 0;
     {
-        float three_words_width    = imgui.calc_text_size(std::string_view("ABC")).x;
+        float three_words_width    = imgui.calc_text_size("ABC"sv).x;
         const int line_capacity = 4;
 
         for (const auto& extruder_filaments : {m_left_extruder_filament,m_right_extruder_filament })

src/slic3r/GUI/GLCanvas3D.cpp

@@ -177,6 +177,8 @@ extern wxPopupWindow* wxCurrentPopupWindow;
 #endif
 #endif
 
+using namespace std::string_view_literals;
+
 static constexpr const float TRACKBALLSIZE = 0.8f;
 
 static Slic3r::ColorRGBA DEFAULT_BG_LIGHT_COLOR      = { 0.906f, 0.906f, 0.906f, 1.0f };
@@ -2425,11 +2427,15 @@ void GLCanvas3D::_render_scene(const Camera& camera, const Size& cnv_size)
     if (m_canvas_type == ECanvasType::CanvasView3D) {
         // m_show_bed gates the plate list too: hiding the bed but leaving its grid and outline
         // floating would read as a rendering fault rather than a deliberate view option.
-        // Design tab: while its reference planes are up they draw their own axes from the modeling
-        // origin, where the bed's triad would otherwise sit on top of them.
-        if (show_bed)
-            _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(),
-                        m_show_world_axes && !(m_design_sketch_tool != nullptr && m_design_sketch_tool->draws_reference_axes()));
+        if (show_bed) {
+            bool show_axes = m_show_world_axes;
+#ifdef SLIC3R_CAD
+            // Design tab: while its reference planes are up they draw their own axes from the modeling
+            // origin, where the bed's triad would otherwise sit on top of them.
+            show_axes = show_axes && !(m_design_sketch_tool != nullptr && m_design_sketch_tool->draws_reference_axes());
+#endif
+            _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), show_axes);
+        }
         m_frame_profiler.mark("bed");
         if (show_bed) //BBS: add outline logic
             _render_platelist(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), only_current, only_body, hover_id, true, show_grid);

src/slic3r/GUI/GUI_App.cpp

@@ -9040,7 +9040,7 @@ std::map<std::string, std::string> GUI_App::get_delete_cache_presets_lock()
 
 void GUI_App::process_delete_presets()
 {
-    std::map<string, string> delete_cache_presets = get_delete_cache_presets_lock();
+    std::map<std::string, std::string> delete_cache_presets = get_delete_cache_presets_lock();
     for (auto it = delete_cache_presets.begin(); it != delete_cache_presets.end();) {
         if (it->first.empty()) continue;
         std::string del_setting_id = it->first;
@@ -10068,7 +10068,7 @@ bool is_soluble_filament(int extruder_id)
     return support_option->get_at(0);
 };
 
-bool has_filaments(const std::vector<string>& model_filaments) {
+bool has_filaments(const std::vector<std::string>& model_filaments) {
     auto &filament_presets = Slic3r::GUI::wxGetApp().preset_bundle->filament_presets;
     if (!Slic3r::GUI::wxGetApp().plater()) return false;
     auto model_objects = Slic3r::GUI::wxGetApp().plater()->model().objects;
@@ -10103,7 +10103,7 @@ bool is_support_filament(int extruder_id, bool strict_check)
     Slic3r::ConfigOptionBools *support_option = dynamic_cast<Slic3r::ConfigOptionBools *>(filament->config.option("filament_is_support"));
 
     if(!strict_check &&(filament_type == "PETG" || filament_type == "PLA")) {
-        std::vector<string> model_filaments;
+        std::vector<std::string> model_filaments;
         if (filament_type == "PETG")
             model_filaments.emplace_back("PLA");
         else {

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -1108,7 +1108,7 @@ void ObjectList::update_name_column_width() const
         }
     }
 
-    GetColumn(colName)->SetWidth(max(0, client_size.x - (others_width)*em));
+    GetColumn(colName)->SetWidth(std::max(0, client_size.x - (others_width)*em));
 }
 
 void ObjectList::set_filament_column_hidden(const bool hide) const
@@ -3970,7 +3970,7 @@ wxDataViewItem ObjectList::add_settings_item(wxDataViewItem parent_item, const D
         if (config->opt_float("layer_height") == object_cfg->opt_float("layer_height")) {
             SettingsFactory::Bundle new_cat_options;
             for (auto cat_opt : cat_options) {
-                std::vector<string> temp;
+                std::vector<std::string> temp;
                 for (auto value : cat_opt.second) {
                     if (value != "layer_height")
                         temp.push_back(value);

src/slic3r/GUI/Gizmos/GizmoObjectManipulation.cpp

@@ -44,6 +44,8 @@
 #define MAX_NUM 9999.99
 #define MAX_SIZE std::string_view{"9999.99"}
 
+using namespace std::string_view_literals;
+
 namespace Slic3r
 {
 namespace GUI

src/slic3r/GUI/HMS.cpp

@@ -33,7 +33,7 @@ static const char* HMS_LOCAL_IMG_PATH = "hms/local_image";
 
 // the local HMS info
 // Orca: dev-id-type set trimmed to the devices Orca ships local HMS images for
-static unordered_set<string> package_dev_id_types {"094", "239", "093", "22E"};
+static std::unordered_set<std::string> package_dev_id_types {"094", "239", "093", "22E"};
 
 // Orca: HMS should be disabled when stealth mode is on or networking is not installed
 static bool should_disable_hms()
@@ -345,17 +345,17 @@ wxString HMSQuery::query_hms_msg(const std::string& dev_id, const std::string& l
     return _query_hms_msg(dev_id.substr(0, 3), long_error_code, lang_code);
 }
 
-string HMSQuery::get_dev_id_type(const MachineObject* obj) const
+std::string HMSQuery::get_dev_id_type(const MachineObject* obj) const
 {
     if (obj)
     {
         return obj->get_dev_id().substr(0, 3);
     }
 
-    return string();
+    return std::string();
 }
 
-wxString HMSQuery::_query_hms_msg(const string& dev_id_type, const string& long_error_code, const string& lang_code)
+wxString HMSQuery::_query_hms_msg(const std::string& dev_id_type, const std::string& long_error_code, const std::string& lang_code)
 {
     if (long_error_code.empty())
     {
@@ -426,9 +426,9 @@ wxString HMSQuery::_query_hms_msg(const string& dev_id_type, const string& long_
     return wxEmptyString;
 }
 
-bool HMSQuery::_is_internal_error(const string &dev_id_type,
-                                  const string &error_code,
-                                  const string &lang_code)
+bool HMSQuery::_is_internal_error(const std::string &dev_id_type,
+                                  const std::string &error_code,
+                                  const std::string &lang_code)
 {
     init_hms_info(dev_id_type);
     auto iter = m_hms_info_jsons.find(dev_id_type);

src/slic3r/GUI/Jobs/PrintJob.cpp

@@ -335,7 +335,7 @@ void PrintJob::process(Ctl &ctl)
         auto origin_profile_id = model_info->metadata_items.find(BBL_DESIGNER_PROFILE_ID_TAG);
         if (origin_profile_id != model_info->metadata_items.end()) {
             try {
-                params.origin_profile_id    = stoi(origin_profile_id->second.c_str());
+                params.origin_profile_id    = std::stoi(origin_profile_id->second.c_str());
             }
             catch(...) {}
         }

src/slic3r/GUI/NotificationManager.cpp

@@ -536,12 +536,12 @@ void NotificationManager::PopNotification::count_lines()
 		return;
 
 	// handle with marks
-    if (pos_start == string::npos && pos_end == string::npos) {
+    if (pos_start == std::string::npos && pos_end == std::string::npos) {
         pos_start = text.find(error_start);
-        if (pos_start != string::npos) {
+        if (pos_start != std::string::npos) {
             text.erase(pos_start, error_start.length());
             pos_end = text.find(error_end);
-            if (pos_end != string::npos) {
+            if (pos_end != std::string::npos) {
                 text.erase(pos_end, error_end.length());
             }
         }
@@ -675,7 +675,7 @@ void NotificationManager::PopNotification::bbl_render_block_notif_text(ImGuiWrap
 			if (m_text1.size() > m_endlines[i])
 				last_end += (m_text1[m_endlines[i]] == '\n' || m_text1[m_endlines[i]] == ' ' ? 1 : 0);
 
-			if (pos_start != string::npos && pos_end != string::npos && m_endlines[i] - line.length() >= pos_start && m_endlines[i] <= pos_end) {
+			if (pos_start != std::string::npos && pos_end != std::string::npos && m_endlines[i] - line.length() >= pos_start && m_endlines[i] <= pos_end) {
 				push_style_color(ImGuiCol_Text, m_ErrorColor, m_state == EState::FadingOut, m_current_fade_opacity);
 				imgui.text(line.c_str());
 				ImGui::PopStyleColor();
@@ -737,7 +737,7 @@ void NotificationManager::PopNotification::render_text(ImGuiWrapper& imgui, cons
 			if (m_text1.size() > m_endlines[i])
 				last_end += (m_text1[m_endlines[i]] == '\n' || m_text1[m_endlines[i]] == ' ' ? 1 : 0);
 
-            if (pos_start != string::npos && pos_end != string::npos&& m_endlines[i] - line.length() >= pos_start && m_endlines[i] <= pos_end) {
+            if (pos_start != std::string::npos && pos_end != std::string::npos&& m_endlines[i] - line.length() >= pos_start && m_endlines[i] <= pos_end) {
                 push_style_color(ImGuiCol_Text, m_ErrorColor, m_state == EState::FadingOut, m_current_fade_opacity);
                 imgui.text(line.c_str());
                 ImGui::PopStyleColor();

src/slic3r/GUI/PartSkipDialog.cpp

@@ -86,7 +86,7 @@ PartSkipDialog::PartSkipDialog(wxWindow *parent) : DPIDialog(parent, wxID_ANY, _
 {
     std::time_t       t = std::time(0);
     std::stringstream buf;
-    buf << put_time(std::localtime(&t), "%a_%b_%d_%H_%M_%S/");
+    buf << std::put_time(std::localtime(&t), "%a_%b_%d_%H_%M_%S/");
     m_timestamp = buf.str();
 
     SetBackgroundColour(*wxWHITE);
@@ -402,7 +402,7 @@ std::string PartSkipDialog::create_tmp_path()
     return tmp_path;
 }
 
-bool PartSkipDialog::is_local_file_existed(const std::vector<string> &local_paths)
+bool PartSkipDialog::is_local_file_existed(const std::vector<std::string> &local_paths)
 {
     for (auto path : local_paths) {
         if (!std::filesystem::exists(path)) { return false; }
@@ -703,8 +703,8 @@ void PartSkipDialog::InitDialogUI()
     m_parts_state.clear();
     m_parts_name.clear();
 
-    string pick_img   = m_local_paths[0];
-    string slice_info = m_local_paths[2];
+    std::string pick_img   = m_local_paths[0];
+    std::string slice_info = m_local_paths[2];
 
     m_switch_drag_btn->SetIcon("canvas_drag");
     m_switch_drag_btn->SetBackgroundColor(*wxWHITE);

src/slic3r/GUI/PartSkipDialog.hpp

@@ -139,11 +139,11 @@ private:
     boost::shared_ptr<PrinterFileSystem> m_file_sys;
     std::string                          m_timestamp;
     std::string                          m_tmp_path;
-    std::vector<string>                  m_local_paths;
-    std::vector<string>                  m_target_paths;
+    std::vector<std::string>             m_local_paths;
+    std::vector<std::string>             m_target_paths;
     std::string                          create_tmp_path();
 
-    bool is_local_file_existed(const std::vector<string> &local_paths);
+    bool is_local_file_existed(const std::vector<std::string> &local_paths);
 
     void DownloadPartsFile();
     void OnFileSystemEvent(wxCommandEvent &event);

src/slic3r/GUI/Plater.cpp

@@ -357,7 +357,7 @@ wxDEFINE_EVENT(EVT_NOTICE_FULL_SCREEN_CHANGED, IntEvent);
 #define PRINTER_PANEL_RADIUS (6) // ORCA
 #define BTN_SYNC_SIZE (wxSize(FromDIP(96), FromDIP(98)))
 
-static string get_diameter_string(float diameter)
+static std::string get_diameter_string(float diameter)
 {
     std::ostringstream stream; // ORCA ensure 0.25 returned as 0.25. previous code returned as 0.2 because of std::setprecision(1)
     stream << std::fixed << std::setprecision(2) << diameter;  // Use 2 decimals to capture 0.25 / 0.15 reliably
@@ -6323,7 +6323,7 @@ void Sidebar::sync_ams_list(bool is_from_big_sync_btn)
     }
 
     // BBS:Record consumables information before synchronization
-    std::vector<string> color_before_sync;
+    std::vector<std::string> color_before_sync;
     std::vector<bool>   is_support_before;
     DynamicPrintConfig& project_config = wxGetApp().preset_bundle->project_config;
     ConfigOptionStrings* color_opt = project_config.option<ConfigOptionStrings>("filament_colour");
@@ -12762,7 +12762,7 @@ void Plater::priv::on_select_preset(wxCommandEvent &evt)
     Vec3d old_plate_pos = old_plate->get_center_origin();
 
     // BBS: Save the model in the current platelist
-    std::vector<vector<int> > plate_object;
+    std::vector<std::vector<int> > plate_object;
     for (size_t i = 0; i < old_plate_list.get_plate_count(); ++i) {
         PartPlate* plate = old_plate_list.get_plate(i);
         std::vector<int> obj_idxs;
@@ -17975,7 +17975,7 @@ bool Plater::load_files(const wxArrayString& filenames)
 
     // Orca: Iters through given paths and imports files from zip then remove zip from paths
     // returns true if zip files were found
-    auto handle_zips = [this](vector<fs::path>& paths) { // NOLINT(*-no-recursion) - Recursion is intended and should be managed properly
+    auto handle_zips = [this](std::vector<fs::path>& paths) { // NOLINT(*-no-recursion) - Recursion is intended and should be managed properly
         bool res = false;
         for (auto it = paths.begin(); it != paths.end();) {
             if (boost::algorithm::iends_with(it->string(), ".zip")) {

src/slic3r/GUI/Preferences.cpp

@@ -378,7 +378,7 @@ wxBoxSizer *PreferencesDialog::create_item_combobox(wxString title, wxString too
 
     auto current_setting = app_config->get(param);
     if (!current_setting.empty()) {
-        auto compare  = [current_setting](string possible_setting) { return current_setting == possible_setting; };
+        auto compare  = [current_setting](std::string possible_setting) { return current_setting == possible_setting; };
         auto iterator = find_if(config_name_index.begin(), config_name_index.end(), compare);
         if (iterator != config_name_index.end())
             current_index = static_cast<unsigned int>(iterator - config_name_index.begin());
@@ -1714,7 +1714,7 @@ void PreferencesDialog::create_items()
     g_sizer->Add(create_item_title(_L("Project")), 1, wxEXPAND);
 
     std::vector<wxString> projectLoadSettingsBehaviourOptions = {_L("Load All"), _L("Ask When Relevant"), _L("Always Ask"), _L("Load Geometry Only")};
-    std::vector<string>   projectLoadSettingsConfigOptions    = { OPTION_PROJECT_LOAD_BEHAVIOUR_LOAD_ALL, OPTION_PROJECT_LOAD_BEHAVIOUR_ASK_WHEN_RELEVANT, OPTION_PROJECT_LOAD_BEHAVIOUR_ALWAYS_ASK, OPTION_PROJECT_LOAD_BEHAVIOUR_LOAD_GEOMETRY };
+    std::vector<std::string> projectLoadSettingsConfigOptions    = { OPTION_PROJECT_LOAD_BEHAVIOUR_LOAD_ALL, OPTION_PROJECT_LOAD_BEHAVIOUR_ASK_WHEN_RELEVANT, OPTION_PROJECT_LOAD_BEHAVIOUR_ALWAYS_ASK, OPTION_PROJECT_LOAD_BEHAVIOUR_LOAD_GEOMETRY };
     auto item_project_load     = create_item_combobox(_L("Load behavior"), _L("Should printer/filament/process settings be loaded when opening a 3MF file?"), SETTING_PROJECT_LOAD_BEHAVIOUR, projectLoadSettingsBehaviourOptions, projectLoadSettingsConfigOptions);
     g_sizer->Add(item_project_load);
 

src/slic3r/GUI/Project.cpp

@@ -239,7 +239,7 @@ void ProjectPanel::on_reload(wxCommandEvent& evt)
         }
 
         bool has_content = false;
-        for (const string& v : {
+        for (const std::string& v : {
                  update_type,
                  license,
                  model_name,

src/slic3r/GUI/PublishSettingsDialog.cpp

@@ -14,6 +14,7 @@
 #include "Widgets/DialogButtons.hpp"
 #include "Widgets/StaticLine.hpp"
 #include "Widgets/StateColor.hpp"
+#include "Widgets/SwitchButton.hpp"
 
 #include "libslic3r/PrintConfig.hpp"
 #include "libslic3r/Preset.hpp"
@@ -864,34 +865,25 @@ void PublishSettingsDialog::build_option_model()
     };
 
     // --- Phase 1: printer per-extruder retraction settings (first, mirroring the sidebar's
-    // Printer group), from the printer tab's "Extruder"/"Extruder N" pages. One inner tab per
-    // extruder (e.g. "Left Extruder"/"Right Extruder" via Tab::translate_category), each holding
-    // that extruder's Retraction and Z-Hop rows with per-extruder "#N" values.
+    // Printer group), from the printer tab's "Extruder" page. One inner tab per extruder (named
+    // as on the printer tab's switch, e.g. "Left Extruder"/"Right Extruder" via
+    // Tab::translate_category), each holding that extruder's Retraction and Z-Hop rows with
+    // per-extruder "#N" values.
     {
         size_t g = section_group_for(Section::Printer);
         std::set<std::string> printer_added;
         for (Tab* tab : wxGetApp().tabs_list) {
-            if (tab->m_type != Preset::TYPE_PRINTER)
+            // The page's controls edit the extruder chosen on the printer tab's switch, so its
+            // option list is read once per extruder.
+            auto*       printer_tab = dynamic_cast<TabPrinter*>(tab);
+            const Page* page        = printer_tab ? printer_tab->extruder_page() : nullptr;
+            if (page == nullptr)
                 continue;
-            for (const PageShp& page : tab->m_pages) {
-                if (!page->title().StartsWith("Extruder"))
-                    continue;
-                // The extruder index of this page: its options are appended with the same
-                // "#N" opt_index (opt.second.second), so derive the tab's index from the first
-                // allowlisted option; skip the page when none is found (defensive).
-                int extruder_idx = -1;
-                for (const ConfigOptionsGroupShp& optgroup : page->m_optgroups) {
-                    if (optgroup->title != "Retraction" && optgroup->title != "Z-Hop")
-                        continue;
-                    for (const auto& opt : optgroup->opt_map())
-                        if (extruder_idx < 0)
-                            extruder_idx = opt.second.second;
-                    if (extruder_idx >= 0)
-                        break;
-                }
-                if (extruder_idx < 0)
-                    continue;
-                const wxString page_title = Tab::translate_category(page->title(), tab->m_type);
+            const size_t extruders_count = printer_tab->m_extruders_count;
+            for (size_t extruder_idx = 0; extruder_idx < extruders_count; ++extruder_idx) {
+                const wxString page_title = Tab::translate_category(extruders_count > 1 ? wxString::Format("Extruder %d", int(extruder_idx + 1)) : wxString("Extruder"), tab->m_type);
+                // Retraction and Z-Hop values are stored per variant column, not per extruder.
+                const int variant_index = printer_tab->extruder_variant_index(int(extruder_idx));
                 for (const ConfigOptionsGroupShp& optgroup : page->m_optgroups) {
                     // Allowlist on the untranslated optgroup title; the "Retraction when
                     // switching material" group is intentionally skipped.
@@ -899,17 +891,17 @@ void PublishSettingsDialog::build_option_model()
                         continue;
                     const wxString subcategory = _(optgroup->title);
                     for (const auto& opt : optgroup->opt_map()) {
-                        const std::string& opt_id   = opt.first;
                         const std::string& pure_key = opt.second.first;
                         // Rows are keyed by the full per-extruder "#N" opt_id so each extruder
                         // tab publishes its own value; GetPublishedKeys() emits the checked rows
                         // as-is.
+                        const std::string opt_id = pure_key + "#" + std::to_string(variant_index);
                         if (!printer_added.insert(opt_id).second)
                             continue;
                         wxString label, value, unit;
                         if (!option_text(opt_id, pure_key, label, value, unit))
                             continue;
-                        size_t cat_index = category_index_for(page_title, Section::Printer, g, size_t(extruder_idx));
+                        size_t cat_index = category_index_for(page_title, Section::Printer, g, extruder_idx);
                         size_t sub_index = subcategory_index_for(cat_index, subcategory, optgroup->icon);
                         add_row_ui(opt_id, label, value, unit, cat_index, sub_index);
                     }
@@ -1098,6 +1090,10 @@ void PublishSettingsDialog::build_option_model()
     for (SectionGroup& section : m_sections)
         if (!section.categories.empty())
             section.tabs->SelectItem(0);
+    // Orca: the Printer section shows its extruders on the same switch as the printer tab's Extruder page.
+    for (size_t s = 0; s < m_sections.size(); ++s)
+        if (m_sections[s].kind == Section::Printer && m_sections[s].categories.size() > 1)
+            setup_variant_switch(s);
     if (!m_sections.empty()) {
         m_outer_tabs->SelectItem(0);
         show_outer_page(0);
@@ -1630,6 +1626,8 @@ void PublishSettingsDialog::show_inner_page(size_t section_index, int inner_inde
         section.selected_mixed = -1;
     }
     section.selected_inner = inner_index;
+    if (section.variant_switch != nullptr)
+        section.variant_switch->SetSelection(inner_index); // fires its event, which ignores the shown page
     Category& category     = m_categories[section.categories[inner_index]];
     category.page->Show();
     category.scroll->FitInside();
@@ -1639,6 +1637,32 @@ void PublishSettingsDialog::show_inner_page(size_t section_index, int inner_inde
     section.page_host_sizer->Layout();
 }
 
+void PublishSettingsDialog::setup_variant_switch(size_t section_index)
+{
+    SectionGroup& section = m_sections[section_index];
+    std::vector<wxString> titles;
+    for (size_t category : section.categories)
+        titles.push_back(m_categories[category].title);
+
+    section.variant_switch = new MultiSwitchButton(section.page);
+    section.variant_switch->SetFitToOptions();
+    section.variant_switch->SetOptions(titles);
+    section.variant_switch->SetSelection(section.selected_inner);
+    section.variant_switch->Bind(wxCUSTOMEVT_MULTISWITCH_SELECTION, [this, section_index](wxCommandEvent& evt) {
+        evt.Skip();
+        // The hidden tab strip stays the selection model; its event shows the page.
+        SectionGroup& sec = m_sections[section_index];
+        if (evt.GetInt() != sec.selected_inner)
+            sec.tabs->SelectItem(evt.GetInt());
+    });
+
+    // The switch takes the place of the tab strip, centered like on the printer tab.
+    wxSizer* page_sizer = section.page->GetSizer();
+    page_sizer->Insert(1, section.variant_switch, 0, wxALIGN_CENTER_HORIZONTAL | wxTOP, FromDIP(4));
+    section.tabs->Hide();
+    section.page->Layout();
+}
+
 void PublishSettingsDialog::show_mixed_page(size_t section_index, int mixed_index)
 {
     if (section_index >= m_sections.size())
@@ -2184,6 +2208,13 @@ void PublishSettingsDialog::refresh_tab_indicators()
         for (size_t i = 0; i < section.categories.size(); ++i) {
             const bool on = category_has_selection(m_categories[section.categories[i]]);
             section.tabs->SetItemIndicator(static_cast<unsigned int>(i), on);
+            // The switch has no indicator dot; mark its option text instead.
+            if (section.variant_switch != nullptr) {
+                const wxString& title = m_categories[section.categories[i]].title;
+                const wxString  text  = on ? title + wxString(" ") + wxString(wxUniChar(0x2022)) : title;
+                if (section.variant_switch->GetOptionText(static_cast<unsigned int>(i)) != text)
+                    section.variant_switch->SetOptionText(static_cast<unsigned int>(i), text);
+            }
             any = any || on;
         }
         if (section.mixed_tabs != nullptr)
@@ -2248,6 +2279,8 @@ void PublishSettingsDialog::on_dpi_changed(const wxRect& suggested_rect)
         section.tabs->Rescale();
         if (section.mixed_tabs != nullptr)
             section.mixed_tabs->Rescale();
+        if (section.variant_switch != nullptr)
+            section.variant_switch->Rescale();
     }
 
     // Refresh the per-row Color chips at the new DPI (they carry the slot number too).

src/slic3r/GUI/PublishSettingsDialog.hpp

@@ -37,6 +37,7 @@ namespace Slic3r { class DynamicPrintConfig; }
 class TextInput;
 class StaticLine;
 class CheckBox;
+class MultiSwitchButton;
 
 namespace Slic3r { namespace GUI {
 
@@ -195,6 +196,10 @@ private:
         ScalableBitmap icon_bmp;      // tab icon next to the title; rescaled on DPI change
         wxPanel* page{nullptr};
         TabCtrl* tabs{nullptr};
+        // Printer section with several extruders: the extruder switch shown instead of `tabs`, the
+        // same MultiSwitchButton (and option names) as the printer tab's Extruder page. One option
+        // per entry of `categories`, named by its title; `tabs` stays as the hidden selection model.
+        MultiSwitchButton* variant_switch{nullptr};
         // Second tab strip, below the main one, listing only the mixed-color filament slots.
         // Present on the Material section only (null elsewhere).
         TabCtrl* mixed_tabs{nullptr};
@@ -277,6 +282,8 @@ private:
     bool row_is_visible(const Row& row) const;
     void apply_visibility();
     void bind_tab_events();
+    // Replaces a section's inner tab strip with a variant switch (see SectionGroup::variant_switch).
+    void setup_variant_switch(size_t section_index);
 
     TabCtrl* m_outer_tabs{nullptr};
     wxPanel* m_outer_host{nullptr};

src/slic3r/GUI/SelectMachine.cpp

@@ -182,7 +182,7 @@ std::string get_nozzle_volume_type_cloud_string(NozzleVolumeType nozzle_volume_t
 static int s_nozzle_mapping_last_request_time = 0;
 
 std::vector<wxString> SelectMachineDialog::MACHINE_BED_TYPE_STRING;
-std::vector<string> SelectMachineDialog::MachineBedTypeString;
+std::vector<std::string> SelectMachineDialog::MachineBedTypeString;
 void                SelectMachineDialog::init_machine_bed_types()
 {
     if (MACHINE_BED_TYPE_STRING.size() == 0) {
@@ -2748,8 +2748,8 @@ void SelectMachineDialog::on_ok_btn(wxCommandEvent &event)
     std::vector<ConfirmBeforeSendInfo> confirm_text;
 
     // check more than one using in same external spool
-    std::unordered_set<string> main_external_spool_filas;
-    std::unordered_set<string> deputy_external_spool_filas;
+    std::unordered_set<std::string> main_external_spool_filas;
+    std::unordered_set<std::string> deputy_external_spool_filas;
     for (const auto& mapping_info : m_ams_mapping_result) {
         if (mapping_info.ams_id == VIRTUAL_AMS_MAIN_ID_STR){
             main_external_spool_filas.insert(mapping_info.filament_id);
@@ -5239,7 +5239,7 @@ void SelectMachineDialog::update_show_status(MachineObject* obj_)
 
     /*Check high temperture slicing*/
     if (m_print_type == PrintFromType::FROM_NORMAL) {
-        std::set<string>  high_temp_filaments;
+        std::set<std::string> high_temp_filaments;
         std::unordered_set<int> known_fila_soften_extruders;
         std::unordered_set<int> unknown_fila_soften_extruders;
         auto preset_full_config = wxGetApp().preset_bundle->full_config();

src/slic3r/GUI/SelectMachine.hpp

@@ -337,7 +337,7 @@ private:
     wxColour                            m_colour_bold_color{wxColour(38, 46, 48)};
     StateColor                          m_btn_bg_enable;
 
-    std::unordered_map<string, PrintOption*> m_checkbox_list;
+    std::unordered_map<std::string, PrintOption*> m_checkbox_list;
     std::list<PrintOption*>                  m_checkbox_list_order;
 
     std::shared_ptr<int>                m_token = std::make_shared<int>(0);

src/slic3r/GUI/SendToPrinter.cpp

@@ -126,7 +126,7 @@ void SendToPrinterDialog::stripWhiteSpace(std::string& str)
 {
     if (str == "") { return; }
 
-    string::iterator cur_it;
+    std::string::iterator cur_it;
     cur_it = str.begin();
 
     while (cur_it != str.end()) {

src/slic3r/GUI/StatusPanel.hpp

@@ -171,7 +171,7 @@ public:
     std::string current_nozzle_loc = "";
     wxColour m_colour;
 
-    string m_file_name;
+    std::string m_file_name;
     bool   m_ams_loading{false};
     void   doRender(wxDC &dc);
     ExtruderImage(wxWindow *parent, wxWindowID id, int nozzle_num, const wxPoint &pos = wxDefaultPosition, const wxSize &size = wxDefaultSize);
@@ -244,7 +244,7 @@ protected:
     {
         wxString          local_image_url; //local image path
         std::string       img_url_paths; // oss url path
-        vector<wxPanel *> image_broad;
+        std::vector<wxPanel *> image_broad;
         bool              is_selected;
         bool              is_uploaded; // load
         wxBoxSizer *      image_tb_broad = nullptr;

src/slic3r/GUI/SyncAmsInfoDialog.cpp

@@ -1576,7 +1576,7 @@ bool SyncAmsInfoDialog::is_nozzle_type_match(DevExtderSystem data, wxString &err
         }
     }
 
-    vector<int> map_extruders = {1, 0};
+    std::vector<int> map_extruders = {1, 0};
 
     // The default two extruders are left, right, but the order of the extruders on the machine is right, left.
     std::vector<std::string> flow_type_of_machine;
@@ -1676,7 +1676,7 @@ void SyncAmsInfoDialog::stripWhiteSpace(std::string &str)
 {
     if (str == "") { return; }
 
-    string::iterator cur_it;
+    std::string::iterator cur_it;
     cur_it = str.begin();
 
     while (cur_it != str.end()) {

src/slic3r/GUI/Tab.cpp

@@ -811,6 +811,12 @@ wxString Tab::translate_category(const wxString& title, Preset::Type preset_type
         }
         return _("Extruder") + title.SubString(8, title.Last());
     }
+    // Orca: one "Extruder" page serves all extruders; name it "Extruders" when there are several.
+    if (preset_type == Preset::TYPE_PRINTER && title == "Extruder") {
+        auto preset = wxGetApp().preset_bundle;
+        if (preset && preset->get_printer_extruder_count() > 1)
+            return _("Extruders");
+    }
     return _(title);
 }
 
@@ -1153,6 +1159,38 @@ std::string Tab::options_list_storage_key(const std::string& opt_key) const
     return (serialized || is_plugin_field) ? opt_key : opt_key + "#0";
 }
 
+// Orca: deep_diff() flags every vector entry at or past the reference vector's length as changed,
+// whatever its value (e.g. the values of an extruder added by raising the extruder count). A vector
+// grows by copying its first entry (ConfigOptionVector::resize), so such an entry only counts as
+// changed when it differs from the reference's first entry, as before Orca's deep_diff() change.
+// The change of the count itself shows on "extruders_count".
+static void drop_unchanged_added_entries(std::vector<std::string> &options, const DynamicPrintConfig &current, const Preset *reference)
+{
+    if (reference == nullptr)
+        return;
+    // deep_diff() lists a key's entries one after another, so serialize each key's vectors once.
+    std::string              serialized_key;
+    std::vector<std::string> cur_values;
+    std::string              ref_first;
+    options.erase(std::remove_if(options.begin(), options.end(), [&](const std::string &opt) {
+        const auto pos = opt.find('#');
+        if (pos == std::string::npos)
+            return false;
+        const std::string key = opt.substr(0, pos);
+        const size_t      idx = size_t(std::atoi(opt.c_str() + pos + 1));
+        auto ref = dynamic_cast<const ConfigOptionVectorBase *>(reference->config.option(key));
+        auto cur = dynamic_cast<const ConfigOptionVectorBase *>(current.option(key));
+        if (ref == nullptr || cur == nullptr || idx < ref->size() || ref->size() == 0 || idx >= cur->size())
+            return false;
+        if (key != serialized_key) {
+            serialized_key = key;
+            cur_values     = cur->vserialize();
+            ref_first      = ref->vserialize().front();
+        }
+        return cur_values[idx] == ref_first;
+    }), options.end());
+}
+
 void Tab::update_all_extruder_options_status()
 {
     if (!m_extruder_switch && !m_variant_combo) {
@@ -1183,6 +1221,8 @@ void Tab::update_all_extruder_options_status()
 
     auto dirty_options = m_presets->current_dirty_options(true);
     auto nonsys_options = m_presets->current_different_from_parent_options(true);
+    if (m_type == Preset::TYPE_PRINTER)
+        update_custom_dirty(dirty_options, nonsys_options);
     auto filter_extruder_options = [](const std::vector<std::string>& options) {
         std::vector<std::string> filtered_options;
         for (const auto& opt : options) {
@@ -1231,7 +1271,7 @@ void Tab::update_extruder_switch_colors()
 
         if (m_active_page) {
             if (m_active_page->title() == "Speed" || m_active_page->title() == "Motion ability" || m_active_page->title() == "Filament" ||
-                m_active_page->title() == "Setting Overrides" || m_active_page->title() == "Multimaterial") {
+                m_active_page->title() == "Setting Overrides" || m_active_page->title() == "Multimaterial" || is_printer_extruder_page(m_active_page)) {
                 for (auto page_ptr : m_pages) {
                     if (page_ptr.get() == m_active_page) {
                         pages_to_check.push_back(page_ptr);
@@ -1262,8 +1302,8 @@ void Tab::update_extruder_switch_colors()
 void Tab::check_extruder_options_status(int index, bool &sys_extruder, bool &modified_extruder, const std::vector<PageShp>& pages_to_check)
 {
     int config_index = index;
+    int extruder_id  = index;
     if (m_type == Preset::TYPE_PRINT || m_type == Preset::TYPE_PRINTER || m_type == Preset::TYPE_MODEL) {
-        int extruder_id;
         NozzleVolumeType nozzle_type;
         parse_extruder_selection(index, extruder_id, nozzle_type);
 
@@ -1296,6 +1336,10 @@ void Tab::check_extruder_options_status(int index, bool &sys_extruder, bool &mod
                 }
 
                 std::string target_opt_key = base_opt_key + "#" + std::to_string(config_index * stride);
+                // Orca: on the printer's Extruder page only per-variant options use the variant column,
+                // the others (nozzle_diameter, extruder_offset, ...) are indexed by the extruder.
+                if (is_printer_extruder_page(page.get()) && printer_options_with_variant_1.count(base_opt_key) == 0)
+                    target_opt_key = base_opt_key + "#" + std::to_string(extruder_id);
 
                 auto status_iter = m_all_extruder_options_status.find(target_opt_key);
                 if (status_iter != m_all_extruder_options_status.end()) {
@@ -1336,18 +1380,6 @@ void TabPrinter::init_options_list()
     Tab::init_options_list();
     if (m_printer_technology == ptFFF)
         m_options_list.emplace("extruders_count", m_opt_status_value);
-    for (size_t i = 1; i < m_extruders_count; ++i) {
-        wxString target_title = wxString::Format("Extruder %d", int(i + 1));
-        for (auto &page : m_pages) {
-            if (page->title() == target_title) {
-                for (auto group : page->m_optgroups) {
-                    for (auto &opt : group->opt_map())
-                        m_options_list.emplace(opt.first, m_opt_status_value);
-                }
-                break;
-            }
-        }
-    }
 }
 
 void TabPrinter::msw_rescale()
@@ -1437,7 +1469,7 @@ void Tab::update_changed_tree_ui()
                     get_sys_and_mod_flags("compatible_printers", sys_page, modified_page);
                 }
             }
-            if (page->title() == "Speed" || page->title() == "Motion ability" || page->title() == "Filament" || page->title() == "Setting Overrides" || page->title() == "Multimaterial") {
+            if (page->title() == "Speed" || page->title() == "Motion ability" || page->title() == "Filament" || page->title() == "Setting Overrides" || page->title() == "Multimaterial" || is_printer_extruder_page(page.get())) {
                 auto options = generate_extruder_options();
                 for (size_t switch_index = 0; switch_index < options.size(); ++switch_index) {
                     std::vector<PageShp> pages_to_check = { page };
@@ -1540,6 +1572,10 @@ void Tab::on_roll_back_value(const bool to_sys /*= true*/)
 
     m_postpone_update_ui = false;
 
+    // Orca: the restored config may have another extruder count than the tab shows.
+    if (auto printer_tab = dynamic_cast<TabPrinter *>(this))
+        printer_tab->sync_extruders_count();
+
     // When all values are rolled, then we have to update whole tab in respect to the reverted values
     update();
     if (m_active_page)
@@ -1877,6 +1913,17 @@ static wxString pad_combo_value_for_config(const DynamicPrintConfig &config)
     return config.opt_bool("pad_enable") ? (config.opt_bool("pad_around_object") ? _("Around object") : _("Below object")) : _("None");
 }
 
+// Rebuilds the variant switch of every tab that has one, e.g. after the extruder count or a nozzle volume type changed.
+static void update_all_extruder_variants(int extruder_idx = -1)
+{
+    for (auto tab : wxGetApp().tabs_list)
+        tab->update_extruder_variants(extruder_idx);
+    if (auto tab = wxGetApp().plate_tab)
+        tab->update_extruder_variants(extruder_idx);
+    for (auto tab : wxGetApp().model_tabs_list)
+        tab->update_extruder_variants(extruder_idx);
+}
+
 void Tab::on_value_change(const std::string& opt_key, const boost::any& value)
 {
     // Orca:
@@ -2257,7 +2304,7 @@ void Tab::on_value_change(const std::string& opt_key, const boost::any& value)
             wxGetApp().plater()->update();
     }
 
-    string opt_key_without_idx = opt_key.substr(0, opt_key.find('#'));
+    std::string opt_key_without_idx = opt_key.substr(0, opt_key.find('#'));
 
     if (opt_key_without_idx == "long_retractions_when_cut") {
         unsigned char activate = boost::any_cast<unsigned char>(value);
@@ -2319,15 +2366,7 @@ void Tab::on_value_change(const std::string& opt_key, const boost::any& value)
 
     if (opt_key.find("nozzle_volume_type") != std::string::npos) {
         int extruder_idx = std::atoi(opt_key.substr(opt_key.find_last_of('#') + 1).c_str());
-        for (auto tab : wxGetApp().tabs_list) {
-            tab->update_extruder_variants(extruder_idx);
-        }
-        if (auto tab = wxGetApp().plate_tab) {
-            tab->update_extruder_variants(extruder_idx);
-        }
-        for (auto tab : wxGetApp().model_tabs_list) {
-            tab->update_extruder_variants(extruder_idx);
-        }
+        update_all_extruder_variants(extruder_idx);
         if (wxGetApp().app_config->get("auto_calculate_flush") == "all") {
             wxGetApp().plater()->sidebar().auto_calc_flushing_volumes(-1,extruder_idx);
         }
@@ -5685,9 +5724,13 @@ if (is_marlin_flavor)
             size_t extruders_count = size_t(boost::any_cast<int>(v));
             wxTheApp->CallAfter([this, opt_key, value, extruders_count]() {
                 if (opt_key == "extruders_count" || opt_key == "single_extruder_multi_material") {
+                    const size_t old_extruders_count = m_extruders_count;
                     extruders_count_changed(extruders_count);
                     init_options_list(); // m_options_list should be updated before UI updating
                     update_dirty();
+                    // Orca: the variant switches (here, Process in the sidebar, ...) list one option per extruder.
+                    if (m_extruders_count != old_extruders_count)
+                        update_all_extruder_variants();
                     if (opt_key == "single_extruder_multi_material") { // the single_extruder_multimaterial was added to force pages
                         on_value_change(opt_key, value);                      // rebuild - let's make sure the on_value_change is not skipped
 
@@ -5697,6 +5740,7 @@ if (is_marlin_flavor)
 // Orca: we use a different logic here. If SEMM is enabled, we set extruder count to 1.
 #if 1
                             extruders_count_changed(1);
+                            update_all_extruder_variants();
 #else
 
                             std::vector<double> nozzle_diameters =
@@ -5768,14 +5812,13 @@ if (is_marlin_flavor)
         m_pages.insert(m_pages.end() - n_after_single_extruder_MM, page);
     }
 
-    // Orca: build missed extruder pages
-    for (auto extruder_idx = m_extruders_count_old; extruder_idx < m_extruders_count; ++extruder_idx) {
-        const wxString& page_name = (m_extruders_count > 1) ? wxString::Format("Extruder %d", int(extruder_idx + 1)) : wxString::Format("Extruder");
-
-        //# build page
-        //const wxString& page_name = wxString::Format("Extruder %d", int(extruder_idx + 1));
-        auto page = add_options_page(page_name, "custom-gcode_extruder", true); // ORCA: icon only visible on placeholders
-        m_pages.insert(m_pages.begin() + n_before_extruders + extruder_idx, page);
+    // Orca: a single "Extruder" page serves all extruders. Its controls are created once for extruder 0;
+    // switch_excluder() re-targets them to the extruder selected on the variant switch (m_extruder_switch),
+    // which the printer tab shows on this page too.
+    if (extruder_page() == nullptr && m_extruders_count > 0) {
+        const size_t extruder_idx = 0;
+        auto page = add_options_page(L("Extruder"), "custom-gcode_extruder", true); // ORCA: icon only visible on placeholders
+        m_pages.insert(m_pages.begin() + n_before_extruders, page);
 
         auto optgroup = page->new_optgroup(L("Basic information"), L"param_information", -1, true);
             optgroup->append_single_option_line("nozzle_diameter", "printer_extruder_basic_information#nozzle-diameter", extruder_idx);
@@ -5788,8 +5831,10 @@ if (is_marlin_flavor)
             option.opt.full_width = true;
             optgroup->append_single_option_line(option, "printer_extruder_basic_information#extruder-offset-position");
 
-            optgroup->m_on_change = [this, extruder_idx](const t_config_option_key& opt_key, boost::any value)
+            optgroup->m_on_change = [this](const t_config_option_key& opt_key, boost::any value)
             {
+                // The page edits the extruder selected on the variant switch.
+                const size_t extruder_idx = size_t(get_current_active_extruder());
                 bool is_SEMM = m_config->opt_bool("single_extruder_multi_material");
                 if (is_SEMM && m_extruders_count > 1 && boost::starts_with(opt_key, "nozzle_diameter"))
                 {
@@ -5884,22 +5929,22 @@ if (is_marlin_flavor)
             //optgroup->append_line(line);
 #endif
     }
-    // BBS. No extra extruder page for single physical extruder machine
-    // # remove extra pages
-    auto &first_extruder_title = const_cast<wxString &>(m_pages[n_before_extruders]->title());
-    if (m_extruders_count < m_extruders_count_old) {
-        m_pages.erase(	m_pages.begin() + n_before_extruders + m_extruders_count,
-                        m_pages.begin() + n_before_extruders + m_extruders_count_old);
-        if (m_extruders_count == 1)
-            first_extruder_title = wxString::Format("Extruder");
-    } else if (m_extruders_count_old == 1) {
-        first_extruder_title = wxString::Format("Extruder %d", 1);
-    }
-    auto & index = wxGetApp().sidebar().settings_index();
-    for (auto &group : m_pages[n_before_extruders]->m_optgroups) {
-        group->set_config_category_and_type(first_extruder_title, m_type);
-        for (auto &opt : group->opt_map())
-            index.add_key(opt.first + "#0", m_type, group->title, first_extruder_title, group->icon);
+
+    // The page holds only the "#0" controls, so register every extruder's options with the search
+    // index under "Extruder N"; a search hit selects that extruder (TabPrinter::activate_option()).
+    if (Page *page = extruder_page()) {
+        auto &index = wxGetApp().sidebar().settings_index();
+        for (auto &group : page->m_optgroups) {
+            group->set_config_category_and_type(page->title(), m_type);
+            for (auto &opt : group->opt_map()) {
+                if (opt.second.second < 0)
+                    continue;
+                for (size_t i = 0; i < m_extruders_count; ++i) {
+                    const wxString category = m_extruders_count > 1 ? wxString::Format("Extruder %d", int(i + 1)) : wxString("Extruder");
+                    index.add_key(opt.second.first + "#" + std::to_string(i), m_type, group->title, category, group->icon);
+                }
+            }
+        }
     }
 
     Thaw();
@@ -6180,12 +6225,6 @@ void TabPrinter::toggle_options()
         return;
 
     auto nozzle_volumes = m_preset_bundle->project_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type");
-    auto extruders      = m_config->option<ConfigOptionEnumsGeneric>("extruder_type");
-        auto get_index_for_extruder =
-            [this, &extruders](int extruder_id, int stride = 1) {
-        return m_config->get_index_for_extruder(extruder_id + 1, "printer_extruder_id",
-            ExtruderType(extruders->values[extruder_id]), get_actual_nozzle_volume_type(extruder_id), "printer_extruder_variant", stride);
-    };
 
     //BBS: whether the preset is Bambu Lab printer
     bool is_BBL_printer = false;
@@ -6260,14 +6299,13 @@ void TabPrinter::toggle_options()
         toggle_option("tool_change_on_wipe_tower", !bSEMM && supports_wipe_tower_2 && extruders_count > 1);
         toggle_option("wait_for_temp_on_wipe_tower", !bSEMM && supports_wipe_tower_2 && extruders_count > 1);
     }
-    wxString extruder_number;
-    long val = 1;
-    if ( m_active_page->title().IsSameAs(L("Extruder")) ||
-        (m_active_page->title().StartsWith("Extruder ", &extruder_number) && extruder_number.ToLong(&val) &&
-        val > 0 && (size_t)val <= m_extruders_count))
+    if (m_active_page->title() == L("Extruder") && m_extruders_count > 0)
     {
-        size_t i = size_t(val - 1);
-        int variant_index = get_index_for_extruder(i);
+        // Orca: the single Extruder page edits the extruder selected on the variant switch; its
+        // controls carry field index 0 (i), the values are read for `extruder`.
+        const size_t i        = 0;
+        const size_t extruder = std::min<size_t>(size_t(get_current_active_extruder()), m_extruders_count - 1);
+        const int    variant_index = extruder_variant_index(int(extruder));
         bool have_retract_length = m_config->opt_float("retraction_length", variant_index) > 0;
 
         toggle_option("extruder_printable_area", false, i);          // disable
@@ -6294,7 +6332,7 @@ void TabPrinter::toggle_options()
         vec.resize(0);
         vec = {"retract_lift_above", "retract_lift_below", "retract_lift_enforce"};
         for (auto el : vec)
-          toggle_option(el, retraction && (m_config->opt_float("z_hop", i) > 0), i);
+          toggle_option(el, retraction && (m_config->opt_float("z_hop", variant_index) > 0), i);
 
         // some options only apply when not using firmware retraction
         vec.resize(0);
@@ -6347,7 +6385,7 @@ void TabPrinter::toggle_options()
         toggle_option("long_retractions_when_cut", !use_firmware_retraction && m_config->opt_int("enable_long_retraction_when_cut"), i);
         toggle_line("retraction_distances_when_cut", m_config->opt_bool("long_retractions_when_cut", variant_index), i);
 
-        toggle_option("travel_slope", m_config->opt_enum("z_hop_types", i) != ZHopType::zhtNormal, i);
+        toggle_option("travel_slope", m_config->opt_enum("z_hop_types", variant_index) != ZHopType::zhtNormal, i);
     }
 
     if (m_active_page->title() == L("Motion ability")) {
@@ -6421,12 +6459,16 @@ void TabPrinter::on_value_change(const std::string& opt_key, const boost::any& v
         return;
 
     const int pos = opt_key.find("#");
+    // Orca: fields of the single Extruder page keep index 0 but edit the selected extruder.
+    const int data_idx = pos > 0 ? extruder_page_data_index(opt_key) : -1;
 
     if (pos > 0) {
         std::string temp_str = opt_key;
         boost::erase_head(temp_str, pos + 1);
         int orig_opt_idx = static_cast<size_t>(atoi(temp_str.c_str()));
         int opt_idx = orig_opt_idx >= 0 ? orig_opt_idx : 0;
+        if (data_idx >= 0)
+            opt_idx = data_idx;
 
         std::string opt_key_pure = opt_key;
         boost::erase_tail(opt_key_pure, opt_key_pure.size() - pos);
@@ -6461,7 +6503,12 @@ void TabPrinter::on_value_change(const std::string& opt_key, const boost::any& v
         }
     }
 
-    Tab::on_value_change(opt_key, value);
+    // Orca: report Extruder page changes as "key#<extruder>", as the former "Extruder N" pages did,
+    // so per-extruder handling in Tab::on_value_change() sees the extruder that was edited.
+    if (data_idx >= 0)
+        Tab::on_value_change(opt_key.substr(0, pos) + "#" + std::to_string(get_current_active_extruder()), value);
+    else
+        Tab::on_value_change(opt_key, value);
 }
 
 void TabPrinter::update()
@@ -7393,12 +7440,7 @@ bool Tab::tree_sel_change_delayed(wxCommandEvent& event)
         // update_undo_buttons();
         this->OnActivate();
         m_parent->set_active_tab(this);
-        if (m_variant_sizer) {
-            wxWindow *variant_ctrl = m_extruder_switch ? (wxWindow *) m_extruder_switch : m_variant_combo;
-            m_main_sizer->Show(m_variant_sizer, variant_ctrl->IsThisEnabled() && !m_active_page->m_opt_id_map.empty() && !m_active_page->title().StartsWith("Extruder "));
-            if (m_extruder_sync) m_extruder_sync->Show(variant_ctrl->IsShown());
-            GetParent()->Layout();
-        }
+        update_variant_sizer_visibility();
 
         m_page_view->Thaw();
         return false;
@@ -7409,12 +7451,7 @@ bool Tab::tree_sel_change_delayed(wxCommandEvent& event)
         return false;
 
     m_active_page = page;
-    if (m_variant_sizer) {
-        wxWindow *variant_ctrl = m_extruder_switch ? (wxWindow *) m_extruder_switch : m_variant_combo;
-        m_main_sizer->Show(m_variant_sizer, variant_ctrl->IsThisEnabled() && !m_active_page->m_opt_id_map.empty() && !m_active_page->title().StartsWith("Extruder"));
-        if (m_extruder_sync) m_extruder_sync->Show(variant_ctrl->IsShown());
-        GetParent()->Layout();
-    }
+    update_variant_sizer_visibility();
 
     auto throw_if_canceled = std::function<void()>([this](){
 #ifdef WIN32
@@ -8240,9 +8277,11 @@ void Tab::update_extruder_variants(int extruder_id, bool reload)
         m_actual_nozzle_volumes.resize(extruder_nums, NozzleVolumeType::nvtStandard);
         for (int i = 0; i < extruder_nums; i++) m_actual_nozzle_volumes[i] = (NozzleVolumeType)nozzle_volumes->values[i];
 
-        // Orca: a non-Bambu dual-nozzle printer has two extruders but a single variant column, so
-        // the nozzle switch and sync button have nothing to act on. Only enable with real variants.
-        if (extruder_nums >= 2 && m_preset_bundle->support_different_extruders()) {
+        // Orca: when every extruder uses the same variant (e.g. a non-Bambu dual-nozzle printer), the
+        // switch has no nozzle variants to select and nothing to sync. The printer tab still enables it
+        // to choose the extruder its Extruder and Motion ability pages edit.
+        m_extruder_switch_variants = extruder_nums >= 2 && m_preset_bundle->support_different_extruders();
+        if (m_extruder_switch_variants || (m_type == Preset::TYPE_PRINTER && extruder_nums >= 2)) {
             auto options = generate_extruder_options();
             m_extruder_switch->SetOptions(options);
 
@@ -8281,12 +8320,8 @@ void Tab::update_extruder_variants(int extruder_id, bool reload)
     if (m_type == Preset::TYPE_PRINT) {
         update_pages_with_multi_variant();
     }
-    if (m_variant_sizer) {
-        wxWindow *variant_ctrl = m_extruder_switch ? (wxWindow *) m_extruder_switch : m_variant_combo;
-        m_main_sizer->Show(m_variant_sizer, variant_ctrl->IsThisEnabled() && m_active_page && !m_active_page->m_opt_id_map.empty() && !m_active_page->title().StartsWith("Extruder "));
-        if (m_extruder_sync) m_extruder_sync->Show(variant_ctrl->IsShown());
-        GetParent()->Layout();
-    }
+    update_extruder_switch_colors();
+    update_variant_sizer_visibility();
 }
 
 // The variant switch tags are the narrowest place a volume type is named, so they abbreviate it;
@@ -8361,12 +8396,21 @@ std::vector<wxString> Tab::generate_extruder_options()
         return options;
     }
 
+    // Orca: the printer tab has one tag per extruder, named as its former "Extruder N" pages were.
+    // parse_extruder_selection() counts a hybrid extruder as two tags; that still lines up because
+    // only the last extruder can be hybrid.
+    if (m_type == Preset::TYPE_PRINTER) {
+        for (int i = 0; i < extruder_nums; ++i)
+            options.push_back(translate_category(wxString::Format("Extruder %d", i + 1), m_type));
+        return options;
+    }
+
     std::string pt = m_preset_bundle->printers.get_edited_preset().get_printer_type(m_preset_bundle);
-    // Orca: the main/deputy toolhead names describe a dual-nozzle printer, where extruder 0 is the
-    // left (deputy) and extruder 1 the right (main) nozzle. From three extruders on the tools are
-    // interchangeable, so name them by index instead of repeating one side.
+    // Orca: the main/deputy toolhead names describe a Bambu dual-nozzle printer, where extruder 0 is
+    // the left (deputy) and extruder 1 the right (main) nozzle. Other printers number their tools.
+    const bool toolhead_names = extruder_nums == 2 && m_preset_bundle->is_bbl_vendor();
     for (int i = 0; i < extruder_nums; ++i) {
-        wxString extruder_name = extruder_nums > 2 ? wxString::Format("T%d", i + 1) :
+        wxString extruder_name = !toolhead_names ? wxString::Format("T%d", i + 1) :
                                                      _L(DevPrinterConfigUtil::get_toolhead_display_name(
                                                          pt, (i == 0) ? DEPUTY_EXTRUDER_ID : MAIN_EXTRUDER_ID,
                                                          ToolHeadComponent::Nozzle, ToolHeadNameCase::TitleCase, true));
@@ -8383,6 +8427,71 @@ std::vector<wxString> Tab::generate_extruder_options()
     return options;
 }
 
+Page *TabPrinter::extruder_page() const
+{
+    for (const PageShp &page : m_pages)
+        if (page->title() == "Extruder")
+            return page.get();
+    return nullptr;
+}
+
+int TabPrinter::extruder_page_data_index(const std::string &field_id) const
+{
+    if (Page *page = extruder_page())
+        for (const auto &group : page->m_optgroups)
+            if (auto it = group->opt_map().find(field_id); it != group->opt_map().end())
+                return it->second.second;
+    return -1;
+}
+
+int TabPrinter::extruder_variant_index(int extruder)
+{
+    const auto *extruders = m_config->option<ConfigOptionEnumsGeneric>("extruder_type");
+    const int   index     = extruder < int(extruders->size()) ?
+                                m_config->get_index_for_extruder(extruder + 1, "printer_extruder_id", ExtruderType(extruders->values[extruder]),
+                                                                 get_actual_nozzle_volume_type(extruder), "printer_extruder_variant") :
+                                -1;
+    return index < 0 ? extruder : index;
+}
+
+void TabPrinter::update_custom_dirty(std::vector<std::string> &dirty_options, std::vector<std::string> &nonsys_options)
+{
+    drop_unchanged_added_entries(dirty_options, *m_config, &m_presets->get_selected_preset());
+    drop_unchanged_added_entries(nonsys_options, *m_config, m_presets->get_selected_preset_parent());
+}
+
+void TabPrinter::sync_extruders_count()
+{
+    if (m_printer_technology != ptFFF)
+        return;
+    const auto *nozzle_diameter = m_config->option<ConfigOptionFloats>("nozzle_diameter");
+    if (nozzle_diameter == nullptr || nozzle_diameter->size() == m_extruders_count)
+        return;
+    extruders_count_changed(nozzle_diameter->size());
+    init_options_list();
+    update_all_extruder_variants();
+}
+
+void TabPrinter::activate_option(const std::string &opt_key, const wxString &category)
+{
+    wxString number;
+    long     n = 0;
+    const bool numbered = category.StartsWith("Extruder ", &number) && number.ToLong(&n);
+    if (extruder_page() == nullptr || (!numbered && category != "Extruder")) {
+        Tab::activate_option(opt_key, category);
+        return;
+    }
+
+    // Selecting fires the switch's event, which re-targets the page (switch_excluder()).
+    const int extruder_idx = (n >= 1 && n <= long(m_extruders_count)) ? int(n - 1) : 0;
+    if (m_extruder_switch && m_extruder_switch->IsThisEnabled() && extruder_idx != get_current_active_extruder())
+        m_extruder_switch->SetSelection(calculate_selection_index_for_extruder(extruder_idx, get_actual_nozzle_volume_type(extruder_idx)));
+
+    // The page's controls are created for index 0.
+    const auto pos = opt_key.find('#');
+    Tab::activate_option(pos == std::string::npos ? opt_key : opt_key.substr(0, pos) + "#0", "Extruder");
+}
+
 NozzleVolumeType Tab::get_actual_nozzle_volume_type(int extruder_id)
 {
     int extruder_count = m_preset_bundle->get_printer_extruder_count();
@@ -8459,18 +8568,44 @@ bool Tab::get_extruder_sync_enable_state(int extruder_id)
     return false;
 }
 
+bool Tab::variant_switch_active() const
+{
+    if (m_extruder_switch)
+        return m_extruder_switch->IsThisEnabled();
+    return m_variant_combo && m_variant_combo->IsThisEnabled();
+}
+
+void Tab::update_variant_sizer_visibility()
+{
+    if (!m_variant_sizer)
+        return;
+    const bool show = variant_switch_active() && m_active_page && !m_active_page->m_opt_id_map.empty();
+    m_main_sizer->Show(m_variant_sizer, show);
+    if (m_extruder_sync) {
+        m_extruder_sync->Show(show);
+        // Orca: copying between extruders is offered only between nozzle variants, and not on the Extruder page.
+        m_extruder_sync->Enable(m_extruder_switch_variants && !is_printer_extruder_page(m_active_page) &&
+                                get_extruder_sync_enable_state(get_current_active_extruder()));
+    }
+    GetParent()->Layout();
+}
+
 void Tab::switch_excluder(int extruder_id, bool reload)
 {
     Preset & printer_preset = m_preset_bundle->printers.get_edited_preset();
     auto nozzle_volumes = m_preset_bundle->project_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type");
     auto extruders      = printer_preset.config.option<ConfigOptionEnumsGeneric>("extruder_type");
 
+    // Orca: the printer tab re-targets its pages to the extruder selected on the switch. Resolved before
+    // the range check below, which keeps the extruder_type read in get_index_for_extruder in range.
+    if (m_type == Preset::TYPE_PRINTER && extruder_id == -1)
+        extruder_id = get_current_active_extruder();
     if (!m_variant_combo && (extruder_id >= (int)nozzle_volumes->size() || extruder_id >= (int)extruders->size()))
         extruder_id = 0;
     if (m_extruder_switch) {
         int current_extruder = get_current_active_extruder();
         bool sync_enable = get_extruder_sync_enable_state(current_extruder);
-        m_extruder_sync->Enable(m_extruder_switch->IsThisEnabled() && sync_enable);
+        m_extruder_sync->Enable(m_extruder_switch_variants && sync_enable && !is_printer_extruder_page(m_active_page));
         m_extruder_sync->Show();
         if (m_type != Preset::TYPE_PRINTER) {
             if (extruder_id == -1)
@@ -8497,24 +8632,26 @@ void Tab::switch_excluder(int extruder_id, bool reload)
         return;
     if (m_extruder_switch) m_extruder_switch->SetClientData(reinterpret_cast<void*>(static_cast<std::uintptr_t>(index)));
     if (m_variant_combo) m_variant_combo->SetClientData(reinterpret_cast<void *>(static_cast<std::uintptr_t>(index)));
-    wxWindow *variant_ctrl = m_extruder_switch ? (wxWindow *) m_extruder_switch : m_variant_combo;
     for (auto page : m_pages) {
         bool is_extruder = false;
+        int  page_index  = index;
         if (m_type == Preset::TYPE_PRINTER) {
-            if (page->title().StartsWith("Extruder")) {
-                int extruder_id2 = std::atoi(page->title().Mid(9).ToUTF8()) - 1;
-                if (extruder_id >= 0 && extruder_id2 != extruder_id)
-                    continue;
-                if (extruder_id2 > 0)
-                    index = get_index_for_extruder(extruder_id2);
+            if (page->title() == "Extruder")
                 is_extruder = true;
-            } else if (page->title().StartsWith("Motion ability")) {
-                index = get_index_for_extruder(extruder_id == -1 ? 0 : extruder_id, 2);
-            }
+            else if (page->title().StartsWith("Motion ability"))
+                page_index = get_index_for_extruder(extruder_id == -1 ? 0 : extruder_id, 2);
         }
         page->m_opt_id_map.clear();
         for (auto group : page->m_optgroups) {
             for (auto &opt : group->opt_map()) {
+                if (is_extruder && opt.second.second >= 0) {
+                    // Per-variant options use the variant column, the others (nozzle_diameter,
+                    // extruder_offset, ...) are sized by the extruder count and use the extruder.
+                    const int idx = printer_options_with_variant_1.count(opt.second.first) > 0 ? page_index : extruder_id;
+                    const_cast<int &>(opt.second.second) = idx;
+                    page->m_opt_id_map.insert({opt.second.first + "#" + std::to_string(idx), opt.first});
+                    continue;
+                }
                 auto iter = std::find(printer_extruder_options.begin(), printer_extruder_options.end(), opt.second.first);
                 if (iter != printer_extruder_options.end()) {
                     page->m_opt_id_map.insert({opt.first, opt.first});
@@ -8522,9 +8659,9 @@ void Tab::switch_excluder(int extruder_id, bool reload)
                 }
 
                 if (opt.second.second >= 0) {
-                    const_cast<int &>(opt.second.second) = index;
-                    page->m_opt_id_map.insert({opt.second.first + "#" + std::to_string(index), opt.first});
-                    group->draw_multi_extruder = !is_extruder && variant_ctrl->IsThisEnabled();
+                    const_cast<int &>(opt.second.second) = page_index;
+                    page->m_opt_id_map.insert({opt.second.first + "#" + std::to_string(page_index), opt.first});
+                    group->draw_multi_extruder = variant_switch_active();
                 }
             }
         }

src/slic3r/GUI/Tab.hpp

@@ -331,6 +331,10 @@ public:
     MultiSwitchButton *  m_variant_combo   = nullptr;
     ScalableButton *m_extruder_sync   = nullptr;
 	wxPanel *       m_extruder_sync_box  = nullptr;
+    // Orca: whether m_extruder_switch switches nozzle variants (it then offers sync between them).
+    // The printer tab also enables the switch for printers without variants, to choose the extruder
+    // its Extruder and Motion ability pages edit.
+    bool            m_extruder_switch_variants = false;
     std::vector<NozzleVolumeType> m_actual_nozzle_volumes;
 
 public:
@@ -387,6 +391,13 @@ public:
     void        update_changed_tree_ui();
 	void		update_undo_buttons();
     void        update_extruder_switch_colors();
+    // Whether the variant switch (m_extruder_switch / m_variant_combo) is enabled: on the printer tab for
+    // any multi-extruder printer, on the other tabs when it switches nozzle variants.
+    bool        variant_switch_active() const;
+    // Orca: whether `page` is the printer tab's single "Extruder" page, which edits the extruder selected on the switch.
+    bool        is_printer_extruder_page(const Page* page) const { return m_type == Preset::TYPE_PRINTER && page && page->title() == "Extruder"; }
+    // Shows the variant switch row on pages with options that follow it.
+    void        update_variant_sizer_visibility();
     void        update_all_extruder_options_status();
     void        check_extruder_options_status(int index, bool &sys_extruder, bool &modified_extruder, const std::vector<PageShp>& pages_to_check);
 
@@ -444,7 +455,7 @@ public:
 	virtual void    on_value_change(const std::string& opt_key, const boost::any& value);
 
     void            update_wiping_button_visibility();
-	void			activate_option(const std::string& opt_key, const wxString& category);
+	virtual void	activate_option(const std::string& opt_key, const wxString& category);
     void			apply_searcher();
 	void			cache_config_diff(const std::vector<std::string>& selected_options, const DynamicPrintConfig* config = nullptr);
 	void			apply_config_from_cache();
@@ -710,6 +721,25 @@ public:
 	void		cache_extruder_cnt(const DynamicPrintConfig* config = nullptr);
 	bool		apply_extruder_cnt_from_cache();
 	void		refresh_printer_agent_dropdown() const;
+
+	// Orca: a single "Extruder" page for all extruders. Its controls are created once (index 0) and
+	// switch_excluder() re-targets them to the extruder selected on m_extruder_switch.
+	Page*		extruder_page() const;
+	// Config index an "Extruder" page field (e.g. "retraction_length#0") currently edits, -1 if not on that page.
+	int			extruder_page_data_index(const std::string& field_id) const;
+	// Config index of an extruder's per-variant options (Retraction, Z-Hop, ...): its variant column
+	// for the nozzle selected on the switch, or the extruder index on a printer without variants.
+	int			extruder_variant_index(int extruder);
+	// After the config was restored (roll back): follow its extruder count, if it differs.
+	void		sync_extruders_count();
+	// Search jump to "Extruder N" / "key#N": selects extruder N on the switch, then activates the
+	// page's own field on the "Extruder" page.
+	void		activate_option(const std::string& opt_key, const wxString& category) override;
+
+protected:
+	// Orca: values of extruders added by raising the extruder count have no saved / system value to
+	// revert to; the change is shown on "extruders_count", not on each of their parameters.
+	void		update_custom_dirty(std::vector<std::string> &dirty_options, std::vector<std::string> &nonsys_options) override;
 };
 
 class TabSLAMaterial : public Tab

src/slic3r/GUI/WebGuideDialog.cpp

@@ -1682,13 +1682,13 @@ int GuideFrame::SaveProfileData()
     return 0;
 }
 
-void StringReplace(string &strBase, string strSrc, string strDes)
+void StringReplace(std::string &strBase, std::string strSrc, std::string strDes)
 {
-    string::size_type pos    = 0;
-    string::size_type srcLen = strSrc.size();
-    string::size_type desLen = strDes.size();
+    std::string::size_type pos    = 0;
+    std::string::size_type srcLen = strSrc.size();
+    std::string::size_type desLen = strDes.size();
     pos                      = strBase.find(strSrc, pos);
-    while ((pos != string::npos)) {
+    while ((pos != std::string::npos)) {
         strBase.replace(pos, srcLen, strDes);
         pos = strBase.find(strSrc, (pos + desLen));
     }

src/slic3r/GUI/Widgets/AMSControl.cpp

@@ -1052,7 +1052,7 @@ void AMSControl::UpdateAms(const std::string   &series_name,
     /*update humidity popup*/
     if (m_percent_humidity_dry_popup->IsShown())
     {
-        string target_id = m_percent_humidity_dry_popup->get_owner_ams_id();
+        std::string target_id = m_percent_humidity_dry_popup->get_owner_ams_id();
         for (const auto& the_info : ams_info)
         {
             if (target_id == the_info.ams_id)

src/slic3r/GUI/Widgets/AMSControl.hpp

@@ -63,7 +63,7 @@ protected:
 
     std::string                      m_dev_id;
     std::vector<std::vector<std::string>> m_item_ids{ {}, {} };
-    std::vector<std::pair<string, string>> pair_id;
+    std::vector<std::pair<std::string, std::string>> pair_id;
 
     int         m_total_ext_count = 1;
     AMSextruder *m_extruder{nullptr};
@@ -181,7 +181,7 @@ public:
     std::tuple<bool, bool> isFilaSwitchReady();
     void show_switcher_status(bool show);
 
-    void UpdatePassRoad(string ams_id, AMSPassRoadType type, AMSPassRoadSTEP step);
+    void UpdatePassRoad(std::string ams_id, AMSPassRoadType type, AMSPassRoadSTEP step);
     void CreateAms();
     void CreateAmsDoubleNozzle(const std::string &series_name, const std::string& printer_type);
     void CreateAmsSingleNozzle(const std::string &series_name, const std::string &printer_type);

src/slic3r/GUI/Widgets/AMSItem.cpp

@@ -634,7 +634,7 @@ void AMSextruderImage::doRender(wxDC &dc)
 }
 
 
-AMSextruderImage::AMSextruderImage(wxWindow *parent, wxWindowID id, string file_name, const wxSize& size, const wxPoint &pos)
+AMSextruderImage::AMSextruderImage(wxWindow *parent, wxWindowID id, std::string file_name, const wxSize& size, const wxPoint &pos)
 {
     wxWindow::Create(parent, id, pos, size);
     SetBackgroundColour(StateColor::darkModeColorFor(*wxWHITE));
@@ -823,7 +823,7 @@ void SwitcherImage::doRender(wxDC &dc)
     Layout();
 }
 
-SwitcherImage::SwitcherImage(wxWindow *parent, wxWindowID id, string file_name, const wxSize& size, const wxPoint &pos)
+SwitcherImage::SwitcherImage(wxWindow *parent, wxWindowID id, std::string file_name, const wxSize& size, const wxPoint &pos)
 {
     wxWindow::Create(parent, id, pos, size);
     SetBackgroundColour(StateColor::darkModeColorFor(*wxWHITE));
@@ -899,7 +899,7 @@ void AMSextruder::OnAmsLoading(bool load, int nozzle_id, wxColour col /*= AMS_CO
 }
 
 /*return true if something is updated*/
-bool AMSextruder::updateNozzleNum(int nozzle_num, const string& series_name)
+bool AMSextruder::updateNozzleNum(int nozzle_num, const std::string& series_name)
 {
     if (m_nozzle_num == nozzle_num && m_series_name == series_name) return false;
     m_series_name = series_name;

src/slic3r/GUI/Widgets/AMSItem.hpp

@@ -393,10 +393,10 @@ public:
     bool            m_show_state = {false};
     wxColour        m_colour;
     ScalableBitmap  m_ams_extruder;
-    string m_file_name;
+    std::string m_file_name;
     bool            m_ams_loading{ false };
     void            doRender(wxDC &dc);
-    AMSextruderImage(wxWindow *parent, wxWindowID id, string file_name, const wxSize& size, const wxPoint &pos = wxDefaultPosition);
+    AMSextruderImage(wxWindow *parent, wxWindowID id, std::string file_name, const wxSize& size, const wxPoint &pos = wxDefaultPosition);
     ~AMSextruderImage();
 };
 
@@ -444,10 +444,10 @@ public:
     bool            m_show_state = {false};
     wxColour        m_colour;
     ScalableBitmap  m_switcher;
-    string m_file_name;
+    std::string m_file_name;
     // bool            m_ams_loading{ false };
     void            doRender(wxDC &dc);
-    SwitcherImage(wxWindow *parent, wxWindowID id, string file_name, const wxSize& size, const wxPoint &pos = wxDefaultPosition);
+    SwitcherImage(wxWindow *parent, wxWindowID id, std::string file_name, const wxSize& size, const wxPoint &pos = wxDefaultPosition);
     ~SwitcherImage();
 };
 
@@ -456,7 +456,7 @@ class AMSextruder : public wxWindow
 {
 private:
     int    m_nozzle_num = -1;
-    string m_series_name;
+    std::string m_series_name;
 
 public:
     void TurnOn(wxColour col);
@@ -466,7 +466,7 @@ public:
     void msw_rescale();
     void has_ams(bool hams) {m_has_vams = hams; Refresh();};
     void no_ams_mode(bool mode) {m_none_ams_mode = mode; Refresh();};
-    bool updateNozzleNum(int nozzle_num, const std::string& series_name = string());
+    bool updateNozzleNum(int nozzle_num, const std::string& series_name = std::string());
 
     bool            m_none_ams_mode{true};
     bool            m_has_vams{false};

src/slic3r/Utils/BBLNetworkPlugin.cpp

@@ -596,7 +596,8 @@ PrintParams_Legacy BBLNetworkPlugin::as_legacy(PrintParams& param)
 }
 
 // Every PrintParams field except the four the 02.08.01 series added
-// (task_timelapse_use_internal, extruder_cali_manual_mode, svc_context, slicer_uid).
+// (task_timelapse_use_internal, extruder_cali_manual_mode, svc_context, slicer_uid) and the
+// queue_plate_id 02.08.02 appended.
 PrintParams_0203 BBLNetworkPlugin::as_0203(PrintParams& param)
 {
     PrintParams_0203 p;

src/slic3r/Utils/bambu_networking.hpp

@@ -336,6 +336,7 @@ struct PrintParams {
     bool            try_emmc_print;
     std::string     svc_context;
     std::string     slicer_uid;
+    std::string     queue_plate_id;
 };
 
 struct TaskQueryParams
@@ -412,7 +413,7 @@ enum class NetworkAbi {
     Unsupported, // no generation in this build can call it - never dispatch through it
     Legacy,      // 01.10.01: PrintParams_Legacy; send_message/send_message_to_printer take no flag
     V0203,       // 02.03.00: PrintParams_0203; bind takes no dev_model
-    Current,     // 02.08.01: the layouts and signatures this build declares directly
+    Current,     // 02.08.04: the layouts and signatures this build declares directly
 };
 
 struct NetworkLibraryVersion {
@@ -425,10 +426,12 @@ struct NetworkLibraryVersion {
 };
 
 // Every row names the generation that can call it, so a series can never be offered without a
-// host-side ABI for it. Series with no generation - 02.01.01, 02.00.02 and older - must stay out;
-// is_supported_network_version() is the gate that keeps them from loading.
+// host-side ABI for it. Series with no generation - 02.08.01 (whose PrintParams lacks the
+// queue_plate_id that 02.08.02 appended, and whose malformed bind table macOS 27 refuses to
+// load), 02.01.01, 02.00.02 and older - must stay out; is_supported_network_version() is the
+// gate that keeps them from loading.
 static const NetworkLibraryVersion AVAILABLE_NETWORK_VERSIONS[] = {
-    {"02.08.01", "02.08.01", nullptr, true, nullptr, NetworkAbi::Current},
+    {"02.08.04", "02.08.04", nullptr, true, nullptr, NetworkAbi::Current},
     {"02.03.00", "02.03.00", nullptr, false,
      "An older plug-in series. Features that need newer plug-in support, such as print-failure "
      "snapshots in the device error dialog, are unavailable.", NetworkAbi::V0203},

src/slic3r/Utils/json_diff.hpp

@@ -7,9 +7,6 @@
 
 #include "nlohmann/json.hpp"
 
-
-using namespace std;
-
 class json_diff
 {
 private:

tests/libslic3r/test_config.cpp

@@ -538,6 +538,110 @@ SCENARIO("update_diff_values_to_child_config keeps a child's values on variants
     }
 }
 
+SCENARIO("update_non_diff_values_to_base_config keeps a project's changed values on variants it does not list",
+         "[Config][Variant]") {
+    std::set<std::string> no_keys;
+    auto variants = [](std::initializer_list<std::string> names) { return new Slic3r::ConfigOptionStrings(names); };
+
+    GIVEN("A filament base with three variants") {
+        Slic3r::DynamicPrintConfig base;
+        base.set_key_value("filament_extruder_variant",
+            variants({"Direct Drive Standard", "Bowden Standard", "Direct Drive High Flow"}));
+        base.set_deserialize_strict("nozzle_temperature", "220,220,220");
+
+        WHEN("the project was saved when the base had only its first variant") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_key_value("filament_extruder_variant", variants({"Direct Drive Standard"}));
+            project.set_deserialize_strict("nozzle_temperature", "199");
+
+            AND_WHEN("the project lists the value as changed") {
+                project.update_non_diff_values_to_base_config(base, project.keys(), {"nozzle_temperature"}, "", "filament_extruder_variant",
+                                                              Slic3r::filament_options_with_variant, no_keys);
+                THEN("the project's value applies to every variant") {
+                    REQUIRE(project.opt_serialize("nozzle_temperature") == "199,199,199");
+                }
+            }
+            AND_WHEN("the project does not list the value as changed") {
+                project.update_non_diff_values_to_base_config(base, project.keys(), {}, "", "filament_extruder_variant",
+                                                              Slic3r::filament_options_with_variant, no_keys);
+                THEN("the base's values replace it") {
+                    REQUIRE(project.opt_serialize("nozzle_temperature") == "220,220,220");
+                }
+            }
+        }
+        WHEN("the project lists every variant, in another order") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_key_value("filament_extruder_variant",
+                variants({"Bowden Standard", "Direct Drive High Flow", "Direct Drive Standard"}));
+            project.set_deserialize_strict("nozzle_temperature", "190,205,199");
+            project.update_non_diff_values_to_base_config(base, project.keys(), {"nozzle_temperature"}, "", "filament_extruder_variant",
+                                                          Slic3r::filament_options_with_variant, no_keys);
+            THEN("each variant keeps its own value") {
+                REQUIRE(project.opt_serialize("nozzle_temperature") == "199,190,205");
+            }
+        }
+        WHEN("the project lists no variants") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_deserialize_strict("nozzle_temperature", "199");
+            project.update_non_diff_values_to_base_config(base, project.keys(), {"nozzle_temperature"}, "", "filament_extruder_variant",
+                                                          Slic3r::filament_options_with_variant, no_keys);
+            THEN("the project's value applies to every variant") {
+                REQUIRE(project.opt_serialize("nozzle_temperature") == "199,199,199");
+            }
+        }
+    }
+
+    GIVEN("A two-extruder printer base with two variants per extruder") {
+        Slic3r::DynamicPrintConfig base;
+        base.set_key_value("printer_extruder_variant",
+            variants({"Direct Drive Standard", "Direct Drive High Flow", "Direct Drive Standard", "Direct Drive High Flow"}));
+        base.set_key_value("printer_extruder_id", new Slic3r::ConfigOptionInts({1, 1, 2, 2}));
+        base.set_deserialize_strict("retraction_length", "0.8,0.8,0.8,0.8");
+
+        WHEN("the project lists only the Standard variant of each extruder") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_key_value("printer_extruder_variant", variants({"Direct Drive Standard", "Direct Drive Standard"}));
+            project.set_key_value("printer_extruder_id", new Slic3r::ConfigOptionInts({1, 2}));
+            project.set_deserialize_strict("retraction_length", "1.1,2.2");
+            project.update_non_diff_values_to_base_config(base, project.keys(), {"retraction_length"}, "printer_extruder_id", "printer_extruder_variant",
+                                                          Slic3r::printer_options_with_variant_1,
+                                                          Slic3r::printer_options_with_variant_2);
+            THEN("each extruder's High Flow variant takes that extruder's value") {
+                REQUIRE(project.opt_serialize("retraction_length") == "1.1,1.1,2.2,2.2");
+            }
+        }
+        WHEN("the project lists only the Standard variant of each extruder, and the variant lists as changed") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_key_value("printer_extruder_variant", variants({"Direct Drive Standard", "Direct Drive Standard"}));
+            project.set_key_value("printer_extruder_id", new Slic3r::ConfigOptionInts({1, 2}));
+            project.set_deserialize_strict("machine_max_speed_x", "300,100,400,150");
+            base.set_deserialize_strict("machine_max_speed_x", "500,200,500,200,500,200,500,200");
+            project.update_non_diff_values_to_base_config(base, project.keys(),
+                                                          {"machine_max_speed_x", "printer_extruder_id", "printer_extruder_variant"},
+                                                          "printer_extruder_id", "printer_extruder_variant",
+                                                          Slic3r::printer_options_with_variant_1,
+                                                          Slic3r::printer_options_with_variant_2);
+            THEN("the variant lists are the base's") {
+                REQUIRE(project.opt_serialize("printer_extruder_variant") == base.opt_serialize("printer_extruder_variant"));
+                REQUIRE(project.opt_serialize("printer_extruder_id") == "1,1,2,2");
+            }
+            THEN("each extruder's High Flow variant takes that extruder's pair of limits") {
+                REQUIRE(project.opt_serialize("machine_max_speed_x") == "300,100,300,100,400,150,400,150");
+            }
+        }
+        WHEN("the project lists no variants") {
+            Slic3r::DynamicPrintConfig project;
+            project.set_deserialize_strict("retraction_length", "1.1");
+            project.update_non_diff_values_to_base_config(base, project.keys(), {"retraction_length"}, "printer_extruder_id", "printer_extruder_variant",
+                                                          Slic3r::printer_options_with_variant_1,
+                                                          Slic3r::printer_options_with_variant_2);
+            THEN("only the first extruder's variants take the project's value") {
+                REQUIRE(project.opt_serialize("retraction_length") == "1.1,1.1,0.8,0.8");
+            }
+        }
+    }
+}
+
 // SCENARIO("DynamicPrintConfig JSON serialization", "[Config]") {
 //     WHEN("DynamicPrintConfig is serialized and deserialized") {
 // 	auto now = std::chrono::high_resolution_clock::now();

tests/libslic3r/test_config_variant_expansion.cpp

@@ -799,3 +799,67 @@ TEST_CASE("A per-variant filament option read with a single value gives it to ev
     config.load_from_ini_string("pressure_advance = 0.021", ForwardCompatibilitySubstitutionRule::Disable);
     REQUIRE(config.option<ConfigOptionFloats>("pressure_advance")->values == std::vector<double>({0.021, 0.021, 0.021}));
 }
+
+// Machine limits (printer_options_with_variant_2) hold a (normal, silent) pair per printer variant, so the
+// printer Tab's Motion ability page can edit each extruder's own limits.
+TEST_CASE("set_num_extruders gives every printer variant its own pair of machine limits", "[Config]")
+{
+    DynamicPrintConfig config = DynamicPrintConfig::full_print_config();
+    auto speed_x = [&config]() { return config.option<ConfigOptionFloats>("machine_max_speed_x")->values; };
+
+    SECTION("a new extruder's pair is padded with the first value, like the other variant keys") {
+        config.option<ConfigOptionFloats>("machine_max_speed_x")->values = {500., 200.};
+        config.set_num_extruders(3);
+        REQUIRE(config.option<ConfigOptionStrings>("printer_extruder_variant")->size() == 3);
+        REQUIRE(speed_x() == std::vector<double>({500., 200., 500., 500., 500., 500.}));
+    }
+
+    SECTION("per-extruder pairs are kept, and removing an extruder removes its pair") {
+        config.option<ConfigOptionFloats>("machine_max_speed_x")->values = {500., 200., 400., 150., 300., 100.};
+        config.set_num_extruders(3);
+        REQUIRE(speed_x() == std::vector<double>({500., 200., 400., 150., 300., 100.}));
+        config.set_num_extruders(2);
+        REQUIRE(speed_x() == std::vector<double>({500., 200., 400., 150.}));
+    }
+
+    SECTION("a printer with nozzle variants gets a pair per variant") {
+        // 2 extruders x 2 variants each = 4 variants
+        config.option<ConfigOptionStrings>("extruder_variant_list", true)->values = {"Direct Drive Standard,Direct Drive High Flow",
+                                                                                     "Direct Drive Standard,Direct Drive High Flow"};
+        const std::vector<double> per_variant = {500., 200., 510., 210., 520., 220., 530., 230.};
+        config.option<ConfigOptionFloats>("machine_max_speed_x")->values = per_variant;
+        config.set_num_extruders(2);
+        REQUIRE(speed_x() == per_variant);
+
+        config.option<ConfigOptionFloats>("machine_max_speed_x")->values = {500., 200.};
+        config.set_num_extruders(2);
+        REQUIRE(speed_x() == std::vector<double>({500., 200., 500., 500., 500., 500., 500., 500.}));
+    }
+}
+
+// The device drying options hold several values per filament, as many as each filament preset gives.
+TEST_CASE("The device drying options are rebuilt as each filament's values in slot order", "[Config]")
+{
+    DynamicPrintConfig two_values, one_value, no_value;
+    two_values.option<ConfigOptionStrings>("filament_dev_ams_drying_ams_limitations", true)->values = {"1", "0"};
+    two_values.option<ConfigOptionFloats>("filament_dev_ams_drying_temperature", true)->values     = {45., 45., 55., 55.};
+    one_value.option<ConfigOptionStrings>("filament_dev_ams_drying_ams_limitations", true)->values = {"1"};
+    one_value.option<ConfigOptionFloats>("filament_dev_ams_drying_temperature", true)->values      = {65., 65., 75., 75.};
+
+    // values a project stored for three other filaments
+    DynamicPrintConfig config;
+    config.option<ConfigOptionStrings>("filament_dev_ams_drying_ams_limitations", true)->values = {"0", "0", "0"};
+    config.option<ConfigOptionFloats>("filament_dev_chamber_drying_time", true)->values         = {12., 8., 12.};
+
+    set_filament_dev_options(config, {&two_values, &one_value, &two_values});
+    REQUIRE(config.option<ConfigOptionStrings>("filament_dev_ams_drying_ams_limitations")->values ==
+            std::vector<std::string>({"1", "0", "1", "1", "0"}));
+    REQUIRE(config.option<ConfigOptionFloats>("filament_dev_ams_drying_temperature")->values ==
+            std::vector<double>({45., 45., 55., 55., 65., 65., 75., 75., 45., 45., 55., 55.}));
+    // an option no filament defines keeps the stored values
+    REQUIRE(config.option<ConfigOptionFloats>("filament_dev_chamber_drying_time")->values == std::vector<double>({12., 8., 12.}));
+
+    // a filament without the option takes the option's default
+    set_filament_dev_options(config, {&two_values, &no_value});
+    REQUIRE(config.option<ConfigOptionStrings>("filament_dev_ams_drying_ams_limitations")->values == std::vector<std::string>({"1", "0", ""}));
+}

tests/libslic3r/test_preset_bundle_loading.cpp

@@ -6228,8 +6228,9 @@ TEST_CASE("A per-variant project value maps onto its base preset's variant layou
                                                                    base_finder(&base, calls));
     CHECK(config.option<ConfigOptionStrings>("print_extruder_variant")->values ==
           std::vector<std::string>{"Direct Drive Standard", "Direct Drive High Flow"});
-    // The listed key keeps the project's Standard value and takes High Flow from the base.
-    check_double_vector(config.option<ConfigOptionFloats>("outer_wall_speed")->values, {100., 300.});
+    // The listed key keeps the project's Standard value, and High Flow, which the project does not
+    // list, takes it too, as a user preset's value does.
+    check_double_vector(config.option<ConfigOptionFloats>("outer_wall_speed")->values, {100., 100.});
     check_double_vector(config.option<ConfigOptionFloats>("inner_wall_speed")->values, {250., 350.});
 }
 

tests/slic3rutils/test_network_versions.cpp

@@ -78,31 +78,34 @@ TEST_CASE("Series and managed classification", "[NetworkVersions]")
 
 TEST_CASE_METHOD(PluginFolderFixture, "Managed builds fold into the series; customs are surfaced", "[NetworkVersions]")
 {
-    add_plugin("02.08.01.55");          // managed, same series -> folded into the 02.08.01 row
+    add_plugin("02.08.04.60");          // managed, same series -> folded into the 02.08.04 row
     add_plugin("02.09.00.10");          // managed, unknown series -> not listed
+    add_plugin("02.08.01.55");          // managed, series this build no longer has an ABI for -> not listed
     add_plugin("02.03.00.62");          // managed, older whitelisted series -> folded into 02.03.00
     add_plugin("02.01.01.52");          // managed, series with no ABI in this build -> not listed
-    add_plugin("02.08.01_custom");      // custom, whitelisted series -> listed under it
-    add_plugin("02.08.01.52-dev");      // custom (dash-suffixed), whitelisted series -> listed
+    add_plugin("02.08.04_custom");      // custom, whitelisted series -> listed under it
+    add_plugin("02.08.04.52-dev");      // custom (dash-suffixed), whitelisted series -> listed
 
     auto versions = get_all_available_versions();
 
     // The specific managed build never gets its own row - the series represents it.
-    REQUIRE(count_version(versions, "02.08.01.55") == 0);
-    REQUIRE(count_version(versions, "02.08.01")    == 1);
+    REQUIRE(count_version(versions, "02.08.04.60") == 0);
+    REQUIRE(count_version(versions, "02.08.04")    == 1);
     REQUIRE(count_version(versions, "02.09.00.10") == 0);
+    REQUIRE(count_version(versions, "02.08.01.55") == 0);
+    REQUIRE(count_version(versions, "02.08.01")    == 0);
     REQUIRE(count_version(versions, "02.03.00.62") == 0);
     REQUIRE(count_version(versions, "02.03.00")    == 1);
     REQUIRE(count_version(versions, "02.01.01.52") == 0);
     // Custom-named builds are distinct files kept under their own name.
-    REQUIRE(count_version(versions, "02.08.01_custom")  == 1);
-    REQUIRE(count_version(versions, "02.08.01.52-dev")  == 1);
+    REQUIRE(count_version(versions, "02.08.04_custom")  == 1);
+    REQUIRE(count_version(versions, "02.08.04.52-dev")  == 1);
 
     // Newest series first, its customs nested under it (suffix sort: "" < ".52-dev" < "_custom"),
     // then older series, legacy last.
-    REQUIRE(versions[0].version == "02.08.01");
-    REQUIRE(versions[1].version == "02.08.01.52-dev");
-    REQUIRE(versions[2].version == "02.08.01_custom");
+    REQUIRE(versions[0].version == "02.08.04");
+    REQUIRE(versions[1].version == "02.08.04.52-dev");
+    REQUIRE(versions[2].version == "02.08.04_custom");
     REQUIRE(versions[3].version == "02.03.00");
     REQUIRE(versions.back().version == BAMBU_NETWORK_AGENT_VERSION_LEGACY);
 
@@ -111,9 +114,9 @@ TEST_CASE_METHOD(PluginFolderFixture, "Managed builds fold into the series; cust
     REQUIRE_FALSE(versions[3].is_latest);
 
     // Customs sort/render nested under their series (non-empty suffix, base = the series).
-    REQUIRE(versions[1].base_version == "02.08.01");
+    REQUIRE(versions[1].base_version == "02.08.04");
     REQUIRE_FALSE(versions[1].suffix.empty());
-    REQUIRE(versions[2].base_version == "02.08.01");
+    REQUIRE(versions[2].base_version == "02.08.04");
     REQUIRE_FALSE(versions[2].suffix.empty());
 
     // "(Latest)" is the series row, never a nested custom build.
@@ -123,20 +126,20 @@ TEST_CASE_METHOD(PluginFolderFixture, "Managed builds fold into the series; cust
     REQUIRE_FALSE(versions[2].is_latest);
 
     // The stored default that drives download and update-check decisions is now the series.
-    REQUIRE(std::string(get_latest_network_version()) == "02.08.01");
+    REQUIRE(std::string(get_latest_network_version()) == "02.08.04");
 }
 
 TEST_CASE_METHOD(PluginFolderFixture, "Only the loaded series is marked installed", "[NetworkVersions]")
 {
-    add_plugin("02.08.01.55");
-    add_plugin("02.08.01_custom");
+    add_plugin("02.08.04.60");
+    add_plugin("02.08.04_custom");
 
-    // The loaded plug-in reports its full build (02.08.01.55); the series row is what gets marked.
+    // The loaded plug-in reports its full build (02.08.04.60); the series row is what gets marked.
     {
-        auto versions = get_all_available_versions("02.08.01.55");
+        auto versions = get_all_available_versions("02.08.04.60");
         int marked = 0;
         for (const auto& info : versions)
-            if (info.is_loaded) { ++marked; REQUIRE(info.version == "02.08.01"); }
+            if (info.is_loaded) { ++marked; REQUIRE(info.version == "02.08.04"); }
         REQUIRE(marked == 1);
     }
 
@@ -152,10 +155,10 @@ TEST_CASE_METHOD(PluginFolderFixture, "Only the loaded series is marked installe
 
     // A loaded custom build matches its own row, never the bare series.
     {
-        auto versions = get_all_available_versions("02.08.01_custom");
+        auto versions = get_all_available_versions("02.08.04_custom");
         int marked = 0;
         for (const auto& info : versions)
-            if (info.is_loaded) { ++marked; REQUIRE(info.version == "02.08.01_custom"); }
+            if (info.is_loaded) { ++marked; REQUIRE(info.version == "02.08.04_custom"); }
         REQUIRE(marked == 1);
     }
 
@@ -167,11 +170,11 @@ TEST_CASE_METHOD(PluginFolderFixture, "Only the loaded series is marked installe
 TEST_CASE("Only whitelisted series pass the load gate", "[NetworkVersions]")
 {
     // Each whitelisted series, its builds, and custom-named builds of that series.
-    REQUIRE(is_supported_network_version("02.08.01"));
-    REQUIRE(is_supported_network_version("02.08.01.52"));
-    REQUIRE(is_supported_network_version("02.08.01.55"));
-    REQUIRE(is_supported_network_version("02.08.01_custom"));
-    REQUIRE(is_supported_network_version("02.08.01.52-dev"));
+    REQUIRE(is_supported_network_version("02.08.04"));
+    REQUIRE(is_supported_network_version("02.08.04.52"));
+    REQUIRE(is_supported_network_version("02.08.04.60"));
+    REQUIRE(is_supported_network_version("02.08.04_custom"));
+    REQUIRE(is_supported_network_version("02.08.04.52-dev"));
     REQUIRE(is_supported_network_version("02.03.00"));
     REQUIRE(is_supported_network_version("02.03.00.62"));
     REQUIRE(is_supported_network_version("02.03.00.70"));
@@ -179,6 +182,9 @@ TEST_CASE("Only whitelisted series pass the load gate", "[NetworkVersions]")
     REQUIRE(is_supported_network_version(BAMBU_NETWORK_AGENT_VERSION_LEGACY));
 
     // Series whitelisted by previous Orca releases that no generation here can call.
+    REQUIRE_FALSE(is_supported_network_version("02.08.01"));
+    REQUIRE_FALSE(is_supported_network_version("02.08.01.55"));
+    REQUIRE_FALSE(is_supported_network_version("02.08.01_custom"));
     REQUIRE_FALSE(is_supported_network_version("02.01.01.52"));
     REQUIRE_FALSE(is_supported_network_version("02.00.02.50"));
 
@@ -198,9 +204,9 @@ TEST_CASE("Each version resolves to the ABI generation that can call it", "[Netw
 {
     // The generation is keyed on the series, so every build of a series - including the
     // custom-named ones - resolves to the same one.
-    CHECK(network_plugin_abi("02.08.01")        == NetworkAbi::Current);
-    CHECK(network_plugin_abi("02.08.01.55")     == NetworkAbi::Current);
-    CHECK(network_plugin_abi("02.08.01.52-dev") == NetworkAbi::Current);
+    CHECK(network_plugin_abi("02.08.04")        == NetworkAbi::Current);
+    CHECK(network_plugin_abi("02.08.04.60")     == NetworkAbi::Current);
+    CHECK(network_plugin_abi("02.08.04.52-dev") == NetworkAbi::Current);
     CHECK(network_plugin_abi("02.03.00")        == NetworkAbi::V0203);
     CHECK(network_plugin_abi("02.03.00.62")     == NetworkAbi::V0203);
     CHECK(network_plugin_abi("02.03.00_custom") == NetworkAbi::V0203);
@@ -208,6 +214,7 @@ TEST_CASE("Each version resolves to the ABI generation that can call it", "[Netw
 
     // Anything the load gate rejects must dispatch through nothing at all, rather than
     // defaulting to a layout it does not share.
+    CHECK(network_plugin_abi("02.08.01.55") == NetworkAbi::Unsupported);
     CHECK(network_plugin_abi("02.01.01.52") == NetworkAbi::Unsupported);
     CHECK(network_plugin_abi("02.00.02.50") == NetworkAbi::Unsupported);
     CHECK(network_plugin_abi("02.09.00.10") == NetworkAbi::Unsupported);
@@ -234,7 +241,7 @@ TEST_CASE_METHOD(PluginFolderFixture, "Legacy series never adopts discovered bui
     // With nothing else on disk, the series holds "(Latest)" even though its library is
     // not installed.
     for (const auto& info : versions) {
-        if (info.version == "02.08.01") {
+        if (info.version == "02.08.04") {
             REQUIRE(info.is_latest);
             REQUIRE_FALSE(info.is_loaded);
         }