Ensure slice / print buttons visible on frame (Accordion tabs) (#12772)

Fixes
https://github.com/OrcaSlicer/OrcaSlicer/issues/12723#issuecomment-4033223440

## NOTES
• Icons easy to discern so its not an issue
• User will explore this feature while resizing window so its ok as well
• maybe will add a tooltip while button compacted on future

## PROBLEM
print / slice buttons not visible in frame and not usable. bbl machines
uses much more tabs and issue gets worse

**regular printer on minimum window size**
<img width="766" height="96" alt="Screenshot-20260315014602"
src="https://github.com/user-attachments/assets/965e72d2-64d6-462e-abbf-f3c355783da0"
/>

**bbl printer on minimum size**
<img width="764" height="93" alt="Screenshot-20260315014708"
src="https://github.com/user-attachments/assets/1250afd1-45c3-42d9-bda3-334671ec7dc5"
/>

## SOLUTION
tabs uses only icons to reduce space usage dynamically depends on
available space

**regular printer**

![explorer_PoszqO4wyw](https://github.com/user-attachments/assets/848331ee-0206-41a8-961f-e65e68ca5f56)

**bbl printer with multi device enabled**

![explorer_WznxxHVgIJ](https://github.com/user-attachments/assets/3e3a0414-71c2-436d-be3d-d1f380d5d299)

**worst case scenario without issue. (minimum window width + multi
device + Export sliced plate button)**
<img width="772" height="97" alt="Screenshot-20260315015216"
src="https://github.com/user-attachments/assets/8b21d693-4119-4f91-b16d-d734e4633b87"
/>

**adapts automatically to used layout**

![firefox_W80FMQaHee](https://github.com/user-attachments/assets/3f9eed31-2f8d-4763-8911-bf765175d30d)

src/slic3r/GUI/MainFrame.cpp

@@ -475,7 +475,9 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, BORDERLESS_FRAME_
         update_edge_panels();
 #endif
         wxQueueEvent(wxGetApp().plater(), new SimpleEvent(EVT_NOTICE_CHILDE_SIZE_CHANGED));
-        });
+
+        fit_tab_labels(); // ORCA on resize
+    });
 
     //BBS
     Bind(EVT_SELECT_TAB, [this](wxCommandEvent&evt) {
@@ -1242,6 +1244,7 @@ void MainFrame::init_tabpanel() {
                 wxPostEvent(m_plater, SimpleEvent(EVT_GLVIEWTOOLBAR_PREVIEW));
                 m_param_panel->OnActivate();
             }
+            fit_tab_labels(); // ORCA on switching prepare / preview
         }
         //else if (panel == m_param_panel)
         //    m_param_panel->OnActivate();
@@ -1345,8 +1348,10 @@ void MainFrame::init_tabpanel() {
 void MainFrame::show_device(bool bBBLPrinter) {
     auto idx = -1;
     if (bBBLPrinter) {
-        if (m_tabpanel->FindPage(m_monitor) != wxNOT_FOUND)
+        if (m_tabpanel->FindPage(m_monitor) != wxNOT_FOUND) {
+            fit_tab_labels(); // ORCA on printer change - same button layout
             return;
+        }
         // Remove printer view
         if ((idx = m_tabpanel->FindPage(m_printer_view)) != wxNOT_FOUND) {
             m_printer_view->Show(false);
@@ -1386,9 +1391,10 @@ void MainFrame::show_device(bool bBBLPrinter) {
 #endif // _MSW_DARK_MODE
 
     } else {
-        if (m_tabpanel->FindPage(m_printer_view) != wxNOT_FOUND)
+        if (m_tabpanel->FindPage(m_printer_view) != wxNOT_FOUND) {
+            fit_tab_labels(); // ORCA on printer change - same button layout
             return;
-
+        }
         if ((idx = m_tabpanel->FindPage(m_calibration)) != wxNOT_FOUND) {
             m_calibration->Show(false);
             m_tabpanel->RemovePage(idx);
@@ -1414,6 +1420,33 @@ void MainFrame::show_device(bool bBBLPrinter) {
         m_tabpanel->InsertPage(tpMonitor, m_printer_view, _L("Device"), std::string("tab_monitor_active"),
                                std::string("tab_monitor_active"));
     }
+    fit_tab_labels(); // ORCA on printer change
+}
+
+void MainFrame::fit_tab_labels()
+{
+    if (!m_tabpanel || !m_slice_option_btn) // ignore layout change while slice/print buttons not visible
+        return;
+
+    auto* ctrl  = m_tabpanel->GetBtnsListCtrl();
+    auto* sizer = ctrl->GetBtnsSizer();
+    int   count = sizer->GetItemCount();
+
+    // Restore all
+    for (size_t i = 1; i < count; ++i)
+        ctrl->SetCompact(i, false);
+    m_tabpanel->Refresh();
+    Layout();
+
+    // Compact (last to first)
+    for (size_t i = count - 1; i >= 1; --i) {
+        int right = ScreenToClient(m_slice_option_btn->ClientToScreen({})).x;
+        int left  = sizer->GetSize().GetWidth();
+        if (right - left - FromDIP(15) > 0) return;
+        ctrl->SetCompact(i, true);
+        m_tabpanel->Refresh();
+        Layout();
+    }
 }
 
 bool MainFrame::preview_only_hint()
@@ -1790,7 +1823,7 @@ wxBoxSizer* MainFrame::create_side_tools()
     update_side_button_style();
     m_slice_option_btn->Enable();
     m_print_option_btn->Enable();
-    sizer->Add(FromDIP(15), 0, 0, 0, 0);
+    //sizer->Add(FromDIP(15), 0, 0, 0, 0);
     sizer->Add(slice_panel);
     sizer->Add(FromDIP(15), 0, 0, 0, 0);
     sizer->Add(print_panel);
@@ -1915,6 +1948,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                 m_slice_enable = get_enable_slice_status();
                 m_slice_btn->Enable(m_slice_enable);
                 this->Layout();
+                fit_tab_labels(); // ORCA on label change
                 if(m_slice_option_pop_up)
                     m_slice_option_pop_up->Dismiss();
                 });
@@ -1925,6 +1959,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                 m_slice_enable = get_enable_slice_status();
                 m_slice_btn->Enable(m_slice_enable);
                 this->Layout();
+                fit_tab_labels(); // ORCA on label change
                 if(m_slice_option_pop_up)
                     m_slice_option_pop_up->Dismiss();
                 });
@@ -1949,6 +1984,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -1961,6 +1997,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -1987,6 +2024,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -1998,6 +2036,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -2007,6 +2046,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -2018,6 +2058,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -2027,6 +2068,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -2036,6 +2078,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                     });
 
@@ -2074,6 +2117,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                         m_print_enable = get_enable_print_status();
                         m_print_btn->Enable(m_print_enable);
                         this->Layout();
+                        fit_tab_labels(); // ORCA on label change
                         p->Dismiss();
                     });
                     p->append_button(print_multi_machine_btn);
@@ -2088,6 +2132,7 @@ wxBoxSizer* MainFrame::create_side_tools()
                     m_print_enable = get_enable_print_status();
                     m_print_btn->Enable(m_print_enable);
                     this->Layout();
+                    fit_tab_labels(); // ORCA on label change
                     p->Dismiss();
                 });
                 p->append_button(export_gcode_btn);
@@ -2400,6 +2445,8 @@ void MainFrame::on_dpi_changed(const wxRect& suggested_rect)
     this->SetSize(sz);
 
     this->Maximize(is_maximized);
+
+    fit_tab_labels(); // ORCA
 }
 
 void MainFrame::on_sys_color_changed()

src/slic3r/GUI/MainFrame.hpp

@@ -359,6 +359,7 @@ public:
 
     //SoftFever
     void show_device(bool bBBLPrinter);
+    void fit_tab_labels(); // ORCA
 
     PA_Calibration_Dlg* m_pa_calib_dlg{ nullptr };
     Temp_Calibration_Dlg* m_temp_calib_dlg{ nullptr };

src/slic3r/GUI/Notebook.cpp

@@ -202,6 +202,7 @@ bool ButtonsListCtrl::InsertPage(size_t n, const wxString &text, bool bSelect /*
     });
     Slic3r::GUI::wxGetApp().UpdateDarkUI(btn);
     m_pageButtons.insert(m_pageButtons.begin() + n, btn);
+    m_pageLabels.insert(m_pageLabels.begin() + n, text); // ORCA
     m_buttons_sizer->Insert(n, new wxSizerItem(btn));
     m_buttons_sizer->SetCols(m_buttons_sizer->GetCols() + 1);
     m_sizer->Layout();
@@ -212,6 +213,7 @@ void ButtonsListCtrl::RemovePage(size_t n)
 {
     Button* btn = m_pageButtons[n];
     m_pageButtons.erase(m_pageButtons.begin() + n);
+    m_pageLabels.erase(m_pageLabels.begin() + n); // ORCA
     m_buttons_sizer->Remove(n);
 #if __WXOSX__
     RemoveChild(btn);
@@ -238,6 +240,17 @@ void ButtonsListCtrl::SetPageText(size_t n, const wxString& strText)
 {
     Button* btn = m_pageButtons[n];
     btn->SetLabel(strText);
+    if(!strText.empty())  // ORCA
+        m_pageLabels[n] = strText;
+}
+
+// ORCA
+void ButtonsListCtrl::SetCompact(size_t n, bool compact)
+{
+    int em = em_unit(this);
+    Button* btn = m_pageButtons[n];
+    btn->SetMinSize({(compact ? 40 : 136) * em / 10, 36 * em / 10});
+    btn->SetLabel(compact ? "" : (" " +  m_pageLabels[n]));
 }
 
 wxString ButtonsListCtrl::GetPageText(size_t n) const

src/slic3r/GUI/Notebook.hpp

@@ -28,7 +28,9 @@ public:
     void RemovePage(size_t n);
     bool SetPageImage(size_t n, const std::string& bmp_name) const;
     void SetPageText(size_t n, const wxString& strText);
+    void SetCompact(size_t n, bool compact); // ORCA
     wxString GetPageText(size_t n) const;
+    wxFlexGridSizer* GetBtnsSizer(){return m_buttons_sizer;}; // ORCA
 
 private:
     wxFlexGridSizer*                m_buttons_sizer;
@@ -39,6 +41,7 @@ private:
     int                             m_btn_margin;
     int                             m_line_margin;
     //ModeSizer*                      m_mode_sizer {nullptr};
+    std::vector<wxString>           m_pageLabels; // ORCA
 };
 
 class Notebook: public wxBookCtrlBase