fix: snapmaker U1 SelectMachineDialog blocking print

src/slic3r/GUI/SelectMachine.cpp

@@ -1124,7 +1124,10 @@ bool SelectMachineDialog::do_ams_mapping(MachineObject *obj_,bool use_ams)
 
     int filament_result = 0;
     std::vector<bool> map_opt;  //four values: use_left_ams, use_right_ams, use_left_ext, use_right_ext
-    if (nozzle_nums > 1){
+    // Orca: only do the per-physical-extruder left/right split when the device actually reports
+    // 2+ extruders. A non-BBL multi-nozzle printer (e.g. Snapmaker U1) reports a single extruder
+    // with one filament pool, so it maps as a single surface via the else branch below.
+    if (nozzle_nums > 1 && obj_->GetExtderSystem()->GetTotalExtderCount() > 1){
         //get nozzle property, the extders are same?
         if (true/*!can_hybrid_mapping(obj_get_extder_data())*/){
             std::vector<FilamentInfo>           m_ams_mapping_result_left, m_ams_mapping_result_right;
@@ -5498,8 +5501,8 @@ void SelectMachineDialog::reset_and_sync_ams_list()
                 item = new MaterialItem(m_filament_left_panel, colour_rgb, _L(display_materials[extruder]));
                 m_sizer_ams_mapping_left->Add(item, 0, wxALL, FromDIP(5));
             }
-            else if (m_filaments_map[extruder] == 2)
-            {
+            else // map == 2, or (non-BBL multi-nozzle) 3+; update_material_item_pos() collapses
+            {    // these into the single panel when the device reports < 2 extruders.
                 item = new MaterialItem(m_filament_right_panel, colour_rgb, _L(display_materials[extruder]));
                 m_sizer_ams_mapping_right->Add(item, 0, wxALL, FromDIP(5));
             }

src/slic3r/Utils/QidiPrinterAgent.cpp

@@ -1,5 +1,6 @@
 #include "QidiPrinterAgent.hpp"
 #include "Http.hpp"
+#include "IPrinterAgent.hpp"
 #include "libslic3r/PresetBundle.hpp"
 #include "slic3r/GUI/GUI_App.hpp"
 
@@ -48,6 +49,13 @@ AgentInfo QidiPrinterAgent::get_agent_info_static()
     return AgentInfo{"qidi", "Qidi", QidiPrinterAgent_VERSION, "Qidi printer agent"};
 }
 
+FilamentSyncMode QidiPrinterAgent::get_filament_sync_mode() const
+{
+    if (GUI::wxGetApp().app_config->get_bool("use_printer_agents"))
+        return FilamentSyncMode::subscription;
+    return FilamentSyncMode::pull;
+}
+
 bool QidiPrinterAgent::fetch_filament_info(std::string dev_id, FilamentSyncMode sync_mode)
 {
     if (sync_mode != get_filament_sync_mode())

src/slic3r/Utils/QidiPrinterAgent.hpp

@@ -34,7 +34,7 @@ public:
     int start_local_print_with_record(PrintParams params, OnUpdateStatusFn update_fn, WasCancelledFn cancel_fn, OnWaitFn wait_fn) override;
     int start_sdcard_print(PrintParams params, OnUpdateStatusFn update_fn, WasCancelledFn cancel_fn) override;
 
-    FilamentSyncMode get_filament_sync_mode() const override { return FilamentSyncMode::subscription; }
+    FilamentSyncMode get_filament_sync_mode() const override;
 
 private:
     // Push enable_box + value_t<tool> SAVE_VARIABLEs before a print starts.

src/slic3r/Utils/SnapmakerPrinterAgent.cpp

@@ -1,11 +1,13 @@
 #include "SnapmakerPrinterAgent.hpp"
 #include "Http.hpp"
+#include "IPrinterAgent.hpp"
 #include "libslic3r/PresetBundle.hpp"
 #include "slic3r/GUI/GUI_App.hpp"
 
 #include "nlohmann/json.hpp"
 #include <boost/log/trivial.hpp>
 #include <chrono>
+#include <sstream>
 #include <thread>
 
 namespace Slic3r {
@@ -271,4 +273,11 @@ bool SnapmakerPrinterAgent::fetch_filament_info(std::string dev_id, FilamentSync
     return true;
 }
 
+FilamentSyncMode SnapmakerPrinterAgent::get_filament_sync_mode() const
+{
+    if (GUI::wxGetApp().app_config->get_bool("use_printer_agents"))
+        return FilamentSyncMode::subscription;
+    return FilamentSyncMode::pull;
+}
+
 } // namespace Slic3r

src/slic3r/Utils/SnapmakerPrinterAgent.hpp

@@ -18,6 +18,7 @@ public:
     AgentInfo        get_agent_info() override { return get_agent_info_static(); }
 
     bool fetch_filament_info(std::string dev_id, FilamentSyncMode sync_mode = FilamentSyncMode::pull) override;
+    FilamentSyncMode get_filament_sync_mode() const override;
     int connect_printer(std::string dev_id, std::string dev_ip, std::string username, std::string password, bool use_ssl) override;
     int command_start_camera(std::string dev_id) override;