PhysicalPrinters improvements:

- Added possibility to correct delete presets considering with the physical printers
- Smart switching to the printer preset if physical printer was selected

src/libslic3r/Preset.cpp

@@ -1436,6 +1436,11 @@ bool PhysicalPrinter::add_preset(const std::string& preset_name)
     return preset_names.emplace(preset_name).second;
 }
 
+bool PhysicalPrinter::delete_preset(const std::string& preset_name)
+{
+    return preset_names.erase(preset_name) > 0;
+}
+
 PhysicalPrinter::PhysicalPrinter(const std::string& name, const Preset& preset) :
     name(name)
 {
@@ -1521,7 +1526,6 @@ void PhysicalPrinterCollection::load_printers(const std::string& dir_path, const
         }
     m_printers.insert(m_printers.end(), std::make_move_iterator(printers_loaded.begin()), std::make_move_iterator(printers_loaded.end()));
     std::sort(m_printers.begin(), m_printers.end());
-//!    this->select_preset(first_visible_idx());
     if (!errors_cummulative.empty())
         throw std::runtime_error(errors_cummulative);
 }
@@ -1542,8 +1546,11 @@ std::string PhysicalPrinterCollection::path_from_name(const std::string& new_nam
     return (boost::filesystem::path(m_dir_path) / file_name).make_preferred().string();
 }
 
-void PhysicalPrinterCollection::save_printer(const PhysicalPrinter& edited_printer, const std::string& renamed_from)
+void PhysicalPrinterCollection::save_printer(PhysicalPrinter& edited_printer, const std::string& renamed_from/* = ""*/)
 {
+    // controll and update preset_names in edited_printer config 
+    edited_printer.update_preset_names_in_config();
+
     std::string name = renamed_from.empty() ? edited_printer.name : renamed_from;
     // 1) Find the printer with a new_name or create a new one,
     // initialize it with the edited config.
@@ -1605,6 +1612,33 @@ bool PhysicalPrinterCollection::delete_selected_printer()
     return true;
 }
 
+bool PhysicalPrinterCollection::delete_preset_from_printers( const std::string& preset_name, bool first_check /*=true*/)
+{
+    if (first_check) {
+        for (auto printer: m_printers)
+            if (printer.preset_names.size()==1 && *printer.preset_names.begin() == preset_name)
+                return false;
+    }
+
+    std::vector<std::string> printers_for_delete;
+    for (PhysicalPrinter& printer : m_printers)
+        if (printer.preset_names.size() == 1 && *printer.preset_names.begin() == preset_name)
+            printers_for_delete.emplace_back(printer.name);
+        else if (printer.delete_preset(preset_name)) {
+            if (printer.name == get_selected_printer_name() && 
+                preset_name == get_selected_printer_preset_name())
+                select_printer(printer);
+            save_printer(printer);
+        }
+
+    if (!printers_for_delete.empty()) {
+        for (const std::string& printer_name : printers_for_delete)
+            delete_printer(printer_name);
+        unselect_printer();
+    }
+    return true;
+}
+
 std::string PhysicalPrinterCollection::get_selected_full_printer_name() const
 {
     return (m_idx_selected == size_t(-1)) ? std::string() : this->get_selected_printer().get_full_name(m_selected_preset);
@@ -1625,6 +1659,23 @@ PhysicalPrinter& PhysicalPrinterCollection::select_printer_by_name(const std::st
     return *it;
 }
 
+PhysicalPrinter& PhysicalPrinterCollection::select_printer(const std::string& printer_name)
+{
+    auto it = this->find_printer_internal(printer_name);
+    assert(it != m_printers.end());
+
+    // update idx_selected
+    m_idx_selected      = it - m_printers.begin();
+    // update name of the currently selected preset
+    m_selected_preset   = *it->preset_names.begin();
+    return *it;
+}
+
+PhysicalPrinter& PhysicalPrinterCollection::select_printer(const PhysicalPrinter& printer)
+{
+    return select_printer(printer.name);
+}
+
 bool PhysicalPrinterCollection::has_selection() const
 {
     return m_idx_selected != size_t(-1);

src/libslic3r/Preset.hpp

@@ -569,6 +569,7 @@ public:
     // add preset to the preset_names
     // return false, if preset with this name is already exist in the set
     bool                add_preset(const std::string& preset_name);
+    bool                delete_preset(const std::string& preset_name);
     void                reset_presets();
 
     // Return a printer technology, return ptFFF if the printer technology is not set.
@@ -629,7 +630,7 @@ public:
     // Save the printer under a new name. If the name is different from the old one,
     // a new printer is stored into the list of printers.
     // New printer is activated.
-    void            save_printer(const PhysicalPrinter& printer, const std::string& renamed_from);
+    void            save_printer(PhysicalPrinter& printer, const std::string& renamed_from = "");
 
     // Delete the current preset, activate the first visible preset.
     // returns true if the preset was deleted successfully.
@@ -637,6 +638,10 @@ public:
     // Delete the selected preset
     // returns true if the preset was deleted successfully.
     bool            delete_selected_printer();
+    // Delete preset_name preset from all printers:
+    // If there is last preset for the printer and first_check== false, then delete this printer
+    // returns true if all presets were deleted successfully.
+    bool            delete_preset_from_printers(const std::string& preset_name, bool first_check = true);
 
     // Return the selected preset, without the user modifications applied.
     PhysicalPrinter&        get_selected_printer() { return m_printers[m_idx_selected]; }
@@ -659,6 +664,8 @@ public:
 
     // select printer with name and return reference on it
     PhysicalPrinter&        select_printer_by_name(const std::string& full_name);
+    PhysicalPrinter&        select_printer(const std::string &printer_name);
+    PhysicalPrinter&        select_printer(const PhysicalPrinter& printer);
     bool                    has_selection() const;
     void                    unselect_printer() ;
     bool                    is_selected(ConstIterator it, const std::string &preset_name) const;

src/slic3r/GUI/PresetComboBoxes.cpp

@@ -357,6 +357,8 @@ bool PresetComboBox::selection_is_changed_according_to_physical_printers()
             wxGetApp().get_tab(m_type)->update_preset_choice();
         else if (dynamic_cast<TabPresetComboBox*>(this)!=nullptr)
             wxGetApp().sidebar().update_presets(m_type);
+
+        this->update();
         return true;
     }
 
@@ -614,6 +616,8 @@ void PlaterPresetComboBox::show_edit_menu()
                 return;
 
             m_preset_bundle->physical_printers.delete_selected_printer();
+
+            wxGetApp().get_tab(m_type)->update_preset_choice();
             update();
         }, "cross", menu, []() { return true; }, wxGetApp().plater());
 
@@ -855,9 +859,16 @@ void TabPresetComboBox::update()
         set_label_marker(Append(separator(L("System presets")), wxNullBitmap));
     int idx_selected = m_collection->get_selected_idx();
 
-    std::string sel_preset_name = m_preset_bundle->physical_printers.get_selected_printer_preset_name();
+    PrinterTechnology proper_pt = ptAny;
-    PrinterTechnology proper_pt = (m_type == Preset::TYPE_PRINTER && m_preset_bundle->physical_printers.has_selection()) ? 
+    if (m_type == Preset::TYPE_PRINTER && m_preset_bundle->physical_printers.has_selection()) {
-                                  m_collection->find_preset(sel_preset_name)->printer_technology()                       :  ptAny;
+        std::string sel_preset_name = m_preset_bundle->physical_printers.get_selected_printer_preset_name();
+        Preset* preset = m_collection->find_preset(sel_preset_name);
+        if (preset)
+            proper_pt = preset->printer_technology();
+        else
+            m_preset_bundle->physical_printers.unselect_printer();
+    }
+
     for (size_t i = presets.front().is_visible ? 0 : m_collection->num_default_presets(); i < presets.size(); ++i)
     {
         const Preset& preset = presets[i];
@@ -868,7 +879,7 @@ void TabPresetComboBox::update()
         bool is_enabled = true;
         // check this value just for printer presets, when physical printer is selected
         if (m_type == Preset::TYPE_PRINTER && m_preset_bundle->physical_printers.has_selection())
-            is_enabled = m_enable_all ? true : preset.printer_technology() == proper_pt;//m_preset_bundle->physical_printers.get_selected_printer_technology();
+            is_enabled = m_enable_all ? true : preset.printer_technology() == proper_pt;
 
         std::string   bitmap_key = "tab";
         std::string main_icon_name = m_type == Preset::TYPE_PRINTER && preset.printer_technology() == ptSLA ? "sla_printer" : m_main_bitmap_name;
@@ -1017,8 +1028,49 @@ void TabPresetComboBox::update_dirty()
 
 void TabPresetComboBox::update_physical_printers( const std::string& preset_name)
 {
-    if (m_type == Preset::TYPE_PRINTER && update_ph_printers)
+    if (m_type != Preset::TYPE_PRINTER || !m_allow_to_update_physical_printers)
-        update_ph_printers(preset_name);
+        return;
+
+    m_allow_to_update_physical_printers = false;
+
+    PhysicalPrinterCollection& physical_printers = m_preset_bundle->physical_printers;
+    if (!physical_printers.has_selection())
+        return;
+
+    std::string printer_preset_name = physical_printers.get_selected_printer_preset_name();
+
+    if (Preset::remove_suffix_modified(preset_name) == printer_preset_name) {
+        if (!this->is_selected_physical_printer())
+            physical_printers.unselect_printer();
+    }
+    else
+    {
+        ChangePresetForPhysicalPrinterDialog dlg(Preset::remove_suffix_modified(preset_name));
+        if(dlg.ShowModal() == wxID_OK)
+        {
+            if (dlg.m_selection == ChangePresetForPhysicalPrinterDialog::Switch)
+                // unselect physical printer, if it was selected
+                m_preset_bundle->physical_printers.unselect_printer();
+            else
+            {
+                PhysicalPrinter printer = physical_printers.get_selected_printer();
+
+                if (dlg.m_selection == ChangePresetForPhysicalPrinterDialog::ChangePreset)
+                    printer.delete_preset(printer_preset_name);
+
+                if (printer.add_preset(preset_name))
+                    physical_printers.save_printer(printer);
+                else {
+                    wxMessageDialog dialog(nullptr, _L("This preset is already exist for this physical printer. Please, select another one."), _L("Information"), wxICON_INFORMATION | wxOK);
+                    dialog.ShowModal();
+                }
+
+                physical_printers.select_printer_by_name(printer.get_full_name(preset_name));
+            }
+        }
+        else
+            wxGetApp().get_tab(Preset::TYPE_PRINTER)->select_preset(printer_preset_name);
+    }
 }
 
 
@@ -1123,7 +1175,6 @@ void PresetForPrinter::msw_rescale()
 //          PhysicalPrinterDialog
 //------------------------------------------
 
-
 PhysicalPrinterDialog::PhysicalPrinterDialog(wxString printer_name)
     : DPIDialog(NULL, wxID_ANY, _L("Physical Printer"), wxDefaultPosition, wxSize(45 * wxGetApp().em_unit(), -1), wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
@@ -1427,9 +1478,6 @@ void PhysicalPrinterDialog::OnOK(wxEvent& event)
 
         if (dialog.ShowModal() == wxID_NO)
             return;
-
-        // Remove the printer from the list.
-        printers.delete_printer(into_u8(printer_name));
     }
 
     std::set<std::string> repeat_presets;
@@ -1438,8 +1486,6 @@ void PhysicalPrinterDialog::OnOK(wxEvent& event)
         if (!m_printer.add_preset(preset->get_preset_name()))
             repeat_presets.emplace(preset->get_preset_name());
     }
-    // update preset_names in printer config 
-    m_printer.update_preset_names_in_config();
 
     if (!repeat_presets.empty())
     {
@@ -1467,16 +1513,10 @@ void PhysicalPrinterDialog::OnOK(wxEvent& event)
     // save new physical printer
     printers.save_printer(m_printer, renamed_from);
 
-    // update selection on the tab only when it was changed
+    printers.select_printer(m_printer);
-    /*
+
-    if (m_printer.get_preset_name() != wxGetApp().preset_bundle->printers.get_selected_preset_name()) {
+    // refresh preset list on Printer Settings Tab
-        Tab* tab = wxGetApp().get_tab(Preset::TYPE_PRINTER);
+    wxGetApp().get_tab(Preset::TYPE_PRINTER)->update_preset_choice();
-        if (tab) {
-            wxString preset_name = m_printer_presets->GetString(m_printer_presets->GetSelection());
-            tab->select_preset(into_u8(preset_name));
-        }
-    }
-    */
 
     event.Skip();
 }
@@ -1520,4 +1560,74 @@ void PhysicalPrinterDialog::DeletePreset(PresetForPrinter* preset_for_printer)
 }
 
 
+//-----------------------------------------------
+//          ChangePresetForPhysicalPrinterDialog
+//-----------------------------------------------
+
+ChangePresetForPhysicalPrinterDialog::ChangePresetForPhysicalPrinterDialog(const std::string& preset_name)
+    : DPIDialog(nullptr, wxID_ANY, _L("Warning"), wxDefaultPosition, wxSize(45 * wxGetApp().em_unit(), -1), wxDEFAULT_DIALOG_STYLE | wxICON_WARNING/* | wxRESIZE_BORDER*/)
+{
+    SetFont(wxGetApp().normal_font());
+    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+
+    PhysicalPrinterCollection& printers = wxGetApp().preset_bundle->physical_printers;
+    std::string printer_name = printers.get_selected_printer_name();
+    std::string old_preset_name = printers.get_selected_printer_preset_name();
+
+    wxString msg_text = from_u8((boost::format(_u8L("You have selected physical printer \"%1%\"\n"
+                                                     "with related printer preset \"%2%\"")) % 
+                                printer_name % old_preset_name).str());
+    wxStaticText* label_top     = new wxStaticText(this, wxID_ANY, msg_text);
+    label_top->SetFont(wxGetApp().bold_font());
+
+    wxString choices[] = { from_u8((boost::format(_u8L("Just switch to \"%1%\"")) % preset_name).str()),
+                           from_u8((boost::format(_u8L("Change \"%1%\" to \"%2%\" for this physical printer")) % old_preset_name % preset_name).str()),
+                           from_u8((boost::format(_u8L("Add \"%1%\" as a next preset for the the physical printer")) % preset_name).str()) };
+
+    wxRadioBox* selection_type_box = new wxRadioBox(this, wxID_ANY, _L("What would you like to do?"), wxDefaultPosition, wxDefaultSize, WXSIZEOF(choices), choices,
+        3, wxRA_SPECIFY_ROWS);
+    selection_type_box->SetFont(wxGetApp().normal_font());
+    selection_type_box->SetSelection(0);
+
+    selection_type_box->Bind(wxEVT_RADIOBOX, [this](wxCommandEvent& e) {
+        int selection = e.GetSelection();
+        m_selection = (SelectionType)selection;
+    });
+
+    auto radio_sizer = new wxBoxSizer(wxHORIZONTAL);
+    radio_sizer->Add(selection_type_box, 1, wxALIGN_CENTER_VERTICAL);
+
+    wxStdDialogButtonSizer* btns = this->CreateStdDialogButtonSizer(wxOK | wxCANCEL);
+    wxButton* btnOK = static_cast<wxButton*>(this->FindWindowById(wxID_OK, this));
+    btnOK->Bind(wxEVT_BUTTON, &ChangePresetForPhysicalPrinterDialog::OnOK, this);
+
+    wxBoxSizer* topSizer = new wxBoxSizer(wxVERTICAL);
+
+    topSizer->Add(label_top,        0, wxEXPAND | wxLEFT | wxTOP | wxRIGHT, BORDER_W);
+    topSizer->Add(radio_sizer,  1, wxEXPAND | wxLEFT | wxTOP | wxRIGHT, BORDER_W);
+    topSizer->Add(btns,             0, wxEXPAND | wxALL, BORDER_W);
+
+    SetSizer(topSizer);
+    topSizer->SetSizeHints(this);
+}
+
+void ChangePresetForPhysicalPrinterDialog::on_dpi_changed(const wxRect& suggested_rect)
+{
+    const int& em = em_unit();
+
+    msw_buttons_rescale(this, em, { wxID_OK, wxID_CANCEL });
+
+    const wxSize& size = wxSize(45 * em, 35 * em);
+    SetMinSize(size);
+
+    Fit();
+    Refresh();
+}
+
+void ChangePresetForPhysicalPrinterDialog::OnOK(wxEvent& event)
+{
+    event.Skip();
+}
+
+
 }}    // namespace Slic3r::GUI

src/slic3r/GUI/PresetComboBoxes.hpp

@@ -166,7 +166,7 @@ class TabPresetComboBox : public PresetComboBox
     bool show_incompatible {false};
     bool m_enable_all {false};
 
-    std::function<void(std::string)>    update_ph_printers { nullptr };
+    bool    m_allow_to_update_physical_printers {false};
 
 public:
     TabPresetComboBox(wxWindow *parent, Preset::Type preset_type);
@@ -174,8 +174,8 @@ public:
     void set_show_incompatible_presets(bool show_incompatible_presets) {
         show_incompatible = show_incompatible_presets;
     }
-    void set_update_physical_printers_function(std::function<void(std::string)> update_fn) {
+    void allow_to_update_physical_printers() {
-        update_ph_printers = update_fn;
+        m_allow_to_update_physical_printers = m_type == Preset::TYPE_PRINTER;
     }
 
     void update() override;
@@ -263,6 +263,32 @@ protected:
     void on_sys_color_changed() override {};
 };
 
+
+//------------------------------------------------
+//          ChangePresetForPhysicalPrinterDialog
+//------------------------------------------------
+
+class ChangePresetForPhysicalPrinterDialog : public DPIDialog
+{
+    void OnOK(wxEvent& event);
+
+public:
+
+    enum SelectionType
+    {
+        Switch,
+        ChangePreset,
+        AddPreset
+    } m_selection {Switch};
+
+    ChangePresetForPhysicalPrinterDialog(const std::string& preset_name);
+    ~ChangePresetForPhysicalPrinterDialog() {}
+
+protected:
+    void on_dpi_changed(const wxRect& suggested_rect) override;
+    void on_sys_color_changed() override {};
+};
+
 } // namespace GUI
 } // namespace Slic3r
 

src/slic3r/GUI/Tab.cpp

@@ -164,17 +164,14 @@ void Tab::create_preset_tab()
     m_presets_choice->set_selection_changed_function([this](int selection) {
         if (!m_presets_choice->selection_is_changed_according_to_physical_printers())
         {
-            // for the printer presets set callback for the updating of the physical printers
+            // For the printer presets allow to update a physical printer if it is needed.
+            // After call of the update_physical_printers() this possibility will be disabled again to avoid a case,
+            // when select_preset is called from the others than this place
             if (m_type == Preset::TYPE_PRINTER)
-                m_presets_choice->set_update_physical_printers_function([this](std::string preset_name) { update_physical_printers(preset_name);});
+                m_presets_choice->allow_to_update_physical_printers();
 
             // select preset
             select_preset(m_presets_choice->GetString(selection).ToUTF8().data());
-
-            // Disable callback for the updating of the physical printers to avoid a case,
-            // when select_preset is called from the others than this place
-            if (m_type == Preset::TYPE_PRINTER)
-                m_presets_choice->set_update_physical_printers_function(nullptr);
         }
     });
 
@@ -772,36 +769,6 @@ void Tab::update_tab_ui()
     m_presets_choice->update();
 }
 
-void Tab::update_physical_printers(std::string preset_name)
-{
-    PhysicalPrinterCollection& physical_printers = wxGetApp().preset_bundle->physical_printers;
-    if (physical_printers.has_selection() && 
-        Preset::remove_suffix_modified(preset_name) != physical_printers.get_selected_printer_preset_name())
-    {
-        std::string printer_name = physical_printers.get_selected_full_printer_name();
-        wxString msg_text = from_u8((boost::format(_u8L("You have selected physical printer \"%1%\".")) % printer_name).str());
-        msg_text += "\n\n" + _L("Would you like to change related preset for this printer?") + "\n\n" +
-                    _L("Select YES if you want to change related preset for this printer \n"
-                       "or NO to switch to the another preset (logical printer).");
-        wxMessageDialog dialog(nullptr, msg_text, _L("Warning"), wxICON_WARNING | wxYES | wxNO);
-
-        if (dialog.ShowModal() == wxID_YES) {
-            preset_name = Preset::remove_suffix_modified(preset_name);
-            Preset* preset = m_presets->find_preset(preset_name);
-            assert(preset);
-            Preset& edited_preset = m_presets->get_edited_preset();
-            if (preset->name == edited_preset.name)
-                preset = &edited_preset;
-            physical_printers.get_selected_printer().update_from_preset(*preset);
-            physical_printers.select_printer_by_name(physical_printers.get_selected_printer().get_full_name(preset_name));
-            return;
-        }
-    }
-
-    // unselect physical printer, if it was selected
-    m_preset_bundle->physical_printers.unselect_printer();
-}
-
 // Load a provied DynamicConfig into the tab, modifying the active preset.
 // This could be used for example by setting a Wipe Tower position by interactive manipulation in the 3D view.
 void Tab::load_config(const DynamicPrintConfig& config)
@@ -2822,7 +2789,8 @@ void Tab::load_current_preset()
 {
     const Preset& preset = m_presets->get_edited_preset();
 
-    (preset.is_default || preset.is_system) ? m_btn_delete_preset->Disable() : m_btn_delete_preset->Enable(true);
+//    (preset.is_default || preset.is_system) ? m_btn_delete_preset->Disable() : m_btn_delete_preset->Enable(true);
+    update_delete_preset_btn();
 
     update();
     if (m_type == Slic3r::Preset::TYPE_PRINTER) {
@@ -2959,9 +2927,23 @@ void Tab::update_page_tree_visibility()
 
 }
 
+void Tab::update_delete_preset_btn()
+{
+    if (m_type == Preset::TYPE_PRINTER && m_presets_choice->is_selected_physical_printer() &&
+        m_preset_bundle->physical_printers.has_selection()) {
+        // we can't delete last preset from the physical printer
+        m_btn_delete_preset->Enable(m_preset_bundle->physical_printers.get_selected_printer().preset_names.size() > 1);
+    }
+    else {
+        const Preset& preset = m_presets->get_edited_preset();
+        m_btn_delete_preset->Enable(!preset.is_default && !preset.is_system);
+    }
+}
+
 void Tab::update_preset_choice()
 {
     m_presets_choice->update();
+    update_delete_preset_btn();
 }
 
 // Called by the UI combo box when the user switches profiles, and also to delete the current profile.
@@ -2971,16 +2953,55 @@ void Tab::select_preset(std::string preset_name, bool delete_current /*=false*/,
 {
     if (preset_name.empty()) {
         if (delete_current) {
-            // Find an alternate preset to be selected after the current preset is deleted.
+            PhysicalPrinterCollection& physical_printers = m_preset_bundle->physical_printers;
-            const std::deque<Preset> &presets 		= this->m_presets->get_presets();
+            if (m_presets_choice->is_selected_physical_printer()) {
-            size_t    				  idx_current   = this->m_presets->get_idx_selected();
+                PhysicalPrinter& printer = physical_printers.get_selected_printer();
-            // Find the next visible preset.
+
-            size_t 				      idx_new       = idx_current + 1;
+                if (printer.preset_names.size()==1) {
-            if (idx_new < presets.size())
+                    wxMessageDialog dialog(nullptr, _L("It's a last for this physical printer. We can't delete it"), _L("Information"), wxICON_INFORMATION | wxOK);
-                for (; idx_new < presets.size() && ! presets[idx_new].is_visible; ++ idx_new) ;
+                    dialog.ShowModal();
-            if (idx_new == presets.size())
+                }
-                for (idx_new = idx_current - 1; idx_new > 0 && ! presets[idx_new].is_visible; -- idx_new);
+                else {
-            preset_name = presets[idx_new].name;
+                    // just delete this preset from the current physical printer
+                    printer.delete_preset(m_presets->get_edited_preset().name);
+                    // select first from the possible presets for this printer
+                    physical_printers.select_printer(printer);
+
+                    preset_name = physical_printers.get_selected_printer_preset_name();
+                    // revert delete_current value to avoid deleting of the new selected preset
+                    delete_current = false;
+                }
+            }
+            else {
+                // Check preset for delete in physical printers
+                // Ask a customer about next action , if there is a printer with just one preset and this preset is equal to delete
+                if (m_type == Preset::TYPE_PRINTER && !physical_printers.empty() )
+                {
+                    // try to delete selected preset from the all printers it has
+                    if (!physical_printers.delete_preset_from_printers(m_presets->get_edited_preset().name))
+                    {
+                        wxMessageDialog dialog(nullptr, _L("There is/are a physical printer(s), which has/have one and only this printer preset.\n"
+                                                           "This/Those printer(s) will be deletede after deleting of the selected preset.\n"
+                                                           "Are you sure you want to delete the selected preset?"), _L("Warning"), wxYES_NO | wxNO_DEFAULT | wxICON_QUESTION);
+                        if (dialog.ShowModal() == wxID_NO)
+                            return;
+
+                        // delete selected preset from printers and printer, if it's needed
+                        physical_printers.delete_preset_from_printers(m_presets->get_edited_preset().name, false);
+                    }
+                }
+
+                // Find an alternate preset to be selected after the current preset is deleted.
+                const std::deque<Preset> &presets 		= this->m_presets->get_presets();
+                size_t    				  idx_current   = this->m_presets->get_idx_selected();
+                // Find the next visible preset.
+                size_t 				      idx_new       = idx_current + 1;
+                if (idx_new < presets.size())
+                    for (; idx_new < presets.size() && ! presets[idx_new].is_visible; ++ idx_new) ;
+                if (idx_new == presets.size())
+                    for (idx_new = idx_current - 1; idx_new > 0 && ! presets[idx_new].is_visible; -- idx_new);
+                preset_name = presets[idx_new].name;
+            }
         } else {
             // If no name is provided, select the "-- default --" preset.
             preset_name = m_presets->default_preset().name;
@@ -3075,23 +3096,16 @@ void Tab::select_preset(std::string preset_name, bool delete_current /*=false*/,
     }
 
     if (canceled) {
-        update_tab_ui();
+        if (m_type == Preset::TYPE_PRINTER) {
-        /*
+            if (!last_selected_ph_printer_name.empty() &&
-        // unselect physical printer selection to the correct synchronization of the printer presets between Tab and Plater
+                m_presets->get_edited_preset().name == PhysicalPrinter::get_preset_name(last_selected_ph_printer_name)) {
-        if (m_type == Preset::TYPE_PRINTER)
+                // If preset selection was canceled and previously was selected physical printer, we should select it back
-            m_preset_bundle->physical_printers.unselect_printer();
-        */
-
-
-        // Check if preset really was changed.
-        // If preset selection was canceled and previously was selected physical printer, we should select it back
-        if (m_type == Preset::TYPE_PRINTER && !last_selected_ph_printer_name.empty()) {
-            if (m_presets->get_edited_preset().name == PhysicalPrinter::get_preset_name(last_selected_ph_printer_name)) {
                 m_preset_bundle->physical_printers.select_printer_by_name(last_selected_ph_printer_name);
-                m_presets_choice->update();
             }
         }
 
+        update_tab_ui();
+
         // Trigger the on_presets_changed event so that we also restore the previous value in the plater selector,
         // if this action was initiated from the plater.
         on_presets_changed();
@@ -3334,6 +3348,7 @@ void Tab::save_preset(std::string name /*= ""*/, bool detach)
     // If saving the preset changes compatibility with other presets, keep the now incompatible dependent presets selected, however with a "red flag" icon showing that they are no more compatible.
     m_preset_bundle->update_compatible(PresetSelectCompatibleType::Never);
     //update physical printer's related printer preset if it's needed 
+    m_presets_choice->allow_to_update_physical_printers();
     m_presets_choice->update_physical_printers(name);
     // Add the new item into the UI component, remove dirty flags and activate the saved item.
     update_tab_ui();
@@ -3389,7 +3404,9 @@ void Tab::delete_preset()
     // Don't let the user delete the ' - default - ' configuration.
     std::string action = current_preset.is_external ? _utf8(L("remove")) : _utf8(L("delete"));
     // TRN  remove/delete
-    const wxString msg = from_u8((boost::format(_utf8(L("Are you sure you want to %1% the selected preset?"))) % action).str());
+    const wxString msg = m_presets_choice->is_selected_physical_printer() ?
+                         from_u8((boost::format(_utf8(L("Are you sure you want to delete \"%1%\" preset from the physical printer?"))) % current_preset.name).str()) :
+                         from_u8((boost::format(_utf8(L("Are you sure you want to %1% the selected preset?"))) % action).str());
     action = current_preset.is_external ? _utf8(L("Remove")) : _utf8(L("Delete"));
     // TRN  Remove/Delete
     wxString title = from_u8((boost::format(_utf8(L("%1% Preset"))) % action).str());  //action + _(L(" Preset"));

src/slic3r/GUI/Tab.hpp

@@ -275,6 +275,7 @@ public:
     void		load_current_preset();
 	void        rebuild_page_tree();
 	void        update_page_tree_visibility();
+    void		update_delete_preset_btn();
     void		update_preset_choice();
     // Select a new preset, possibly delete the current one.
 	void		select_preset(std::string preset_name = "", bool delete_current = false, const std::string& last_selected_ph_printer_name = "");
@@ -307,7 +308,6 @@ public:
 	void			load_initial_data();
 	void			update_dirty();
 	void			update_tab_ui();
-    void			update_physical_printers(std::string preset_name);
 	void			load_config(const DynamicPrintConfig& config);
 	virtual void	reload_config();
     void            update_mode();