feat: auto-save, 0.1/0.01mm arrow steps, dark mode contrast fix

- Preferences > General Settings: "Auto-save project every 5 minutes"
  checkbox (config key autosave_enabled); a wxTimer in MainFrame fires
  every 5 min and calls save_project() silently when the project has a
  filename, is dirty, and the option is enabled (closes #10334)
- Alt+Arrow moves selected objects by 0.1 mm; Alt+Shift+Arrow by
  0.01 mm; existing Shift+Arrow (1 mm) and plain Arrow (10 mm) are
  unchanged; added to the keyboard shortcuts dialog (closes #10194)
- LayerRangeEditor now explicitly sets background/foreground to the
  app's dark-mode palette colours after UpdateDarkUI(), fixing the
  unreadable contrast in the Height Range Modifier field on Linux dark
  mode (closes #10685)

Author: BenJule

src/slic3r/GUI/GLCanvas3D.cpp

@@ -4329,7 +4329,7 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
 class TranslationProcessor
 {
     using UpAction = std::function<void(void)>;
-    using DownAction = std::function<void(const Vec3d&, bool, bool)>;
+    using DownAction = std::function<void(const Vec3d&, bool, bool, bool)>;
 
     UpAction m_up_action{ nullptr };
     DownAction m_down_action{ nullptr };
@@ -4407,7 +4407,7 @@ class TranslationProcessor
 
             if (apply) {
                 m_running = true;
-                m_down_action(m_direction, evt.ShiftDown(), evt.CmdDown());
+                m_down_action(m_direction, evt.ShiftDown(), evt.CmdDown(), evt.AltDown());
             }
         }
     }
@@ -4433,12 +4433,12 @@ void GLCanvas3D::on_key(wxKeyEvent& evt)
             refresh_camera_scene_box();
             m_dirty = true;
         },
-        [this](const Vec3d& direction, bool slow, bool camera_space) {
+        [this](const Vec3d& direction, bool slow, bool camera_space, bool fine) {
             if (m_gizmos.is_ban_move_glvolume()) {
                 return;
             }
             m_selection.setup_cache();
-            double multiplier = slow ? 1.0 : 10.0;
+            double multiplier = fine ? (slow ? 0.01 : 0.1) : (slow ? 1.0 : 10.0);
 
             Vec3d displacement;
             if (camera_space) {

src/slic3r/GUI/GUI_ObjectLayers.cpp

@@ -351,6 +351,10 @@ LayerRangeEditor::LayerRangeEditor( ObjectLayers* parent,
 {
     this->SetFont(wxGetApp().normal_font());
     wxGetApp().UpdateDarkUI(this);
+    if (wxGetApp().dark_mode()) {
+        SetBackgroundColour(wxGetApp().get_window_default_clr());
+        SetForegroundColour(wxGetApp().get_label_clr_default());
+    }
 
     // Reset m_enter_pressed flag to _false_, when value is editing
     this->Bind(wxEVT_TEXT, [this](wxEvent&) { m_enter_pressed = false; }, this->GetId());

src/slic3r/GUI/KBShortcutsDialog.cpp

@@ -240,6 +240,8 @@ void KBShortcutsDialog::fill_shortcuts()
             {L("Arrow Left"), L("Move selection 10 mm in negative X direction")},
             {L("Arrow Right"), L("Move selection 10 mm in positive X direction")},
             {L("Shift+Any arrow"), L("Movement step set to 1 mm")},
+            {L("Alt+Any arrow"), L("Movement step set to 0.1 mm")},
+            {L("Alt+Shift+Any arrow"), L("Movement step set to 0.01 mm")},
             {"Esc", L("Deselect all")},
             {"1-9", L("keyboard 1-9: set filament for object/part")},
             {ctrl + "0", L("Camera view - Default")},

src/slic3r/GUI/MainFrame.cpp

@@ -296,6 +296,19 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, BORDERLESS_FRAME_
 	});
 #endif
 
+    // Auto-save timer: silently saves the open project every 5 minutes when enabled
+    m_autosave_timer = new wxTimer(this);
+    Bind(wxEVT_TIMER, [this](wxTimerEvent& e) {
+        if (e.GetTimer().GetId() != m_autosave_timer->GetId()) { e.Skip(); return; }
+        if (!wxGetApp().app_config || wxGetApp().app_config->get("autosave_enabled") != "1") return;
+        if (!m_plater) return;
+        if (!m_plater->is_project_dirty()) return;
+        if (m_plater->get_project_filename(".3mf").IsEmpty()) return;
+        BOOST_LOG_TRIVIAL(info) << "auto-save: saving project";
+        m_plater->save_project(false);
+    });
+    m_autosave_timer->Start(5 * 60 * 1000); // every 5 minutes
+
 #ifdef __APPLE__
     // Initialize the docker task bar icon.
     switch (wxGetApp().get_app_mode()) {

src/slic3r/GUI/MainFrame.hpp

@@ -96,6 +96,7 @@ class MainFrame : public DPIFrame
 #endif
     bool     m_loaded {false};
     wxTimer* m_reset_title_text_colour_timer{ nullptr };
+    wxTimer* m_autosave_timer{ nullptr };
 
     wxString    m_qs_last_input_file = wxEmptyString;
     wxString    m_qs_last_output_file = wxEmptyString;

src/slic3r/GUI/Preferences.cpp

@@ -1319,6 +1319,10 @@ wxWindow* PreferencesDialog::create_general_page()
         50, "single_instance");
 
     auto item_auto_transfer_when_switch_preset = create_item_checkbox(_L("Automatically transfer modified value when switching process and filament presets"), page,_L("After closing, a popup will appear to ask each time"), 50, "auto_transfer_when_switch_preset");
+    auto item_autosave = create_item_checkbox(_L("Auto-save project every 5 minutes"), page,
+                                              _L("Automatically save the open project file every 5 minutes. Only saves if the project has a filename and unsaved changes."), 50,
+                                              "autosave_enabled");
+
     auto item_bed_type_follow_preset = create_item_checkbox(_L("Auto plate type"), page,
                                                          _L("Studio will remember build plate selected last time for certain printer model."), 50,
                                                          "user_bed_type");
@@ -1529,6 +1533,7 @@ wxWindow* PreferencesDialog::create_general_page()
     sizer_page->Add(item_region, 0, wxTOP, FromDIP(3));
     sizer_page->Add(item_currency, 0, wxTOP, FromDIP(3));
     sizer_page->Add(item_auto_flush, 0, wxTOP, FromDIP(3));
+    sizer_page->Add(item_autosave, 0, wxTOP, FromDIP(3));
     sizer_page->Add(item_single_instance, 0, wxTOP, FromDIP(3));
     sizer_page->Add(item_bed_type_follow_preset, 0, wxTOP, FromDIP(3));
     //sizer_page->Add(item_hints, 0, wxTOP, FromDIP(3));