Fix macOS object-list filament editor crash/glitch (#13700)

# Description

Fixes a macOS object-list filament editor crash/glitch where the
filament column could enter Cocoa native text editing and expose
`wxCustomRendererObject: 0x...` or crash while committing an invalid
`DataViewBitmapText` value.

The visible `wxCustomRendererObject` glitch was observed on macOS
through Cocoa `wxDataViewCtrl` editing. The underlying unsafe
assignment/variant/editor assumptions are not inherently macOS-only, so
the defensive data-path fixes are cross-platform.

Changes:
- Adds an explicit `DataViewBitmapText` assignment operator that avoids
copying the `wxObject` base, matching the existing copy constructor.
- Rejects unexpected variant types before reading object-list
name/filament values as `DataViewBitmapText`.
- Hardens filament editor value extraction against unexpected editor
controls.
- On macOS, routes filament-column editing through the custom
bitmap-choice renderer instead of `wxDataViewCtrl::EditItem()`, avoiding
native text editing of `wxCustomRendererObject`.



Fixes https://github.com/OrcaSlicer/OrcaSlicer/issues/13682

Previous PR with conversation:
[#13684](https://github.com/OrcaSlicer/OrcaSlicer/pull/13684)

This should fix the crash observed by @Noisyfox as we're addressing the
underlying problem of presenting the `wxCustomRendererObject`.

## Tests

Validated on macOS arm64. Repeated double-click/edit attempts on an
unselected object's filament cell no longer show
`wxCustomRendererObject` and no crash reproduced.

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src/slic3r/GUI/ExtraRenderers.cpp

@@ -343,7 +343,10 @@ wxWindow* BitmapChoiceRenderer::CreateEditorCtrl(wxWindow* parent, wxRect labelR
 
 bool BitmapChoiceRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant& value)
 {
-    ::ComboBox*c         = static_cast<::ComboBox *>(ctrl);
+    auto* c = dynamic_cast<::ComboBox*>(ctrl);
+    if (!c)
+        return false;
+
     int selection = c->GetSelection();
     if (selection < 0)
         return false;

src/slic3r/GUI/ExtraRenderers.hpp

@@ -28,6 +28,15 @@ public:
         m_bmp(other.m_bmp)
     { }
 
+    DataViewBitmapText& operator=(const DataViewBitmapText &other)
+    {
+        if (this != &other) {
+            m_text = other.m_text;
+            m_bmp = other.m_bmp;
+        }
+        return *this;
+    }
+
     void SetText(const wxString &text)      { m_text = text; }
     wxString GetText() const                { return m_text; }
     void SetBitmap(const wxBitmap &bmp)     { m_bmp = bmp; }

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -435,15 +435,25 @@ void ObjectList::create_objects_ctrl()
 
     // column Extruder of the view control:
     BitmapChoiceRenderer* bmp_choice_renderer = new BitmapChoiceRenderer();
-    bmp_choice_renderer->set_can_create_editor_ctrl_function([this]() {
-        return m_objects_model->GetItemType(GetSelection()) & (itVolume | itLayer | itObject);
+    const auto get_filament_context_item = [this]() {
+#ifdef __WXOSX__
+        return m_filament_editor_item.IsOk() ? m_filament_editor_item : GetSelection();
+#else
+        return GetSelection();
+#endif
+    };
+    bmp_choice_renderer->set_can_create_editor_ctrl_function([this, get_filament_context_item]() {
+        const wxDataViewItem item = get_filament_context_item();
+        return m_objects_model->GetItemType(item) & (itVolume | itLayer | itObject);
     });
-    bmp_choice_renderer->set_default_extruder_idx([this]() {
-        return m_objects_model->GetDefaultExtruderIdx(GetSelection());
+    bmp_choice_renderer->set_default_extruder_idx([this, get_filament_context_item]() {
+        const wxDataViewItem item = get_filament_context_item();
+        return m_objects_model->GetDefaultExtruderIdx(item);
     });
-    bmp_choice_renderer->set_has_default_extruder([this]() {
-        return m_objects_model->GetVolumeType(GetSelection()) == ModelVolumeType::PARAMETER_MODIFIER ||
-               m_objects_model->GetItemType(GetSelection()) == itLayer;
+    bmp_choice_renderer->set_has_default_extruder([this, get_filament_context_item]() {
+        const wxDataViewItem item = get_filament_context_item();
+        return m_objects_model->GetVolumeType(item) == ModelVolumeType::PARAMETER_MODIFIER ||
+               m_objects_model->GetItemType(item) == itLayer;
     });
     AppendColumn(new wxDataViewColumn(_L("Fila."), bmp_choice_renderer,
         colFilament, m_columns_width[colFilament] * em, wxALIGN_CENTER_HORIZONTAL, 0));
@@ -461,11 +471,16 @@ void ObjectList::create_objects_ctrl()
         wxALIGN_CENTER_HORIZONTAL, 0);
 
 
-    // Open filament editor faster
+    // On macOS, bypass wxDataViewCtrl::EditItem() for this custom renderer to avoid
+    // native text editing of wxCustomRendererObject.
     this->Bind(wxEVT_DATAVIEW_ITEM_ACTIVATED, [this](wxDataViewEvent& event) {
         if (event.GetColumn() == colFilament) {
+#ifdef __WXOSX__
+            start_filament_editor(event.GetItem());
+#else
             // Trigger the editor opening manually
             this->EditItem(event.GetItem(), GetColumn(colFilament));
+#endif
         }
     });
 
@@ -1082,10 +1097,11 @@ void ObjectList::update_filament_in_config(const wxDataViewItem& item)
     if (m_prevent_update_filament_in_config)
         return;
 
+    ModelConfig* config = nullptr;
     const ItemType item_type = m_objects_model->GetItemType(item);
     if (item_type & itObject) {
         const int obj_idx = m_objects_model->GetIdByItem(item);
-        m_config = &(*m_objects)[obj_idx]->config;
+        config = &(*m_objects)[obj_idx]->config;
     }
     else {
         const int obj_idx = m_objects_model->GetIdByItem(m_objects_model->GetObject(item));
@@ -1094,15 +1110,17 @@ void ObjectList::update_filament_in_config(const wxDataViewItem& item)
              if (obj_idx < 0 || ui_volume_idx < 0)
                 return;
              int volume_in3d_idx = m_objects_model->get_real_volume_index_in_3d(obj_idx,ui_volume_idx);
-             m_config            = &(*m_objects)[obj_idx]->volumes[volume_in3d_idx]->config;
+             config              = &(*m_objects)[obj_idx]->volumes[volume_in3d_idx]->config;
         }
         else if (item_type & itLayer)
-            m_config = &get_item_config(item);
+            config = &get_item_config(item);
     }
 
-    if (!m_config)
+    if (!config)
         return;
 
+    m_config = config;
+
     take_snapshot("Change Filament");
 
     const int extruder = m_objects_model->GetExtruderNumber(item);
@@ -6327,10 +6345,71 @@ void ObjectList::ItemValueChanged(wxDataViewEvent &event)
     }
 }
 
+#ifdef __WXOSX__
+bool ObjectList::is_live_model_item(wxDataViewItem item) const
+{
+    if (!item.IsOk() || !m_objects_model)
+        return false;
+
+    wxDataViewItemArray all_items;
+    m_objects_model->GetAllChildren(wxDataViewItem(nullptr), all_items);
+    for (const wxDataViewItem& live_item : all_items)
+        if (live_item.GetID() == item.GetID())
+            return true;
+
+    return false;
+}
+
+void ObjectList::start_filament_editor(wxDataViewItem item)
+{
+    if (m_starting_filament_editor || !is_live_model_item(item))
+        return;
+
+    const ItemType type = m_objects_model->GetItemType(item);
+    if (!(type & (itVolume | itLayer | itObject)))
+        return;
+
+    auto* column = GetColumn(colFilament);
+    if (!column)
+        return;
+
+    auto* custom_renderer = dynamic_cast<wxDataViewCustomRenderer*>(column->GetRenderer());
+    if (!custom_renderer || custom_renderer->GetEditorCtrl())
+        return;
+
+    m_starting_filament_editor = true;
+    m_filament_editor_item = item;
+    const bool started = custom_renderer->StartEditing(item, GetItemRect(item, column));
+    m_filament_editor_item = wxDataViewItem(nullptr);
+    m_starting_filament_editor = false;
+
+    if (!started)
+        return;
+
+    SetCustomRendererPtr(custom_renderer);
+    SetCustomRendererItem(item);
+}
+#endif // __WXOSX__
+
 void GUI::ObjectList::OnStartEditing(wxDataViewEvent &event)
 {
     auto col  = event.GetColumn();
     auto item = event.GetItem();
+#ifdef __WXOSX__
+    if (col == colFilament) {
+        if (m_starting_filament_editor)
+            return;
+
+        event.Veto();
+        CallAfter([this, item] {
+            if (!is_live_model_item(item))
+                return;
+            start_filament_editor(item);
+        });
+        return;
+    }
+#endif // __WXOSX__
+
     if (col == colName) {
         ObjectDataViewModelNode* node = (ObjectDataViewModelNode*)item.GetID();
         if (node->GetType() & itPlate) {
@@ -6398,6 +6477,12 @@ void ObjectList::OnEditingStarted(wxDataViewEvent &event)
         dynamic_cast<TabPrintModel*>(wxGetApp().get_model_tab(vol_idx >= 0))->reset_model_config();
         return;
     }
+#ifdef __WXOSX__
+    if (col == colFilament) {
+        start_filament_editor(item);
+        return;
+    }
+#endif // __WXOSX__
     if (col != colFilament && col != colName)
         return;
     auto column = GetColumn(col);

src/slic3r/GUI/GUI_ObjectList.hpp

@@ -192,6 +192,13 @@ private:
     int 	    m_last_selected_column = -1;
 #endif /* __MSW__ */
 
+#ifdef __WXOSX__
+    bool m_starting_filament_editor = false;
+    wxDataViewItem m_filament_editor_item { nullptr };
+    bool is_live_model_item(wxDataViewItem item) const;
+    void start_filament_editor(wxDataViewItem item);
+#endif // __WXOSX__
+
 #if 0
     SettingsFactory::Bundle m_freq_settings_fff;
     SettingsFactory::Bundle m_freq_settings_sla;

src/slic3r/GUI/ObjectDataViewModel.cpp

@@ -332,12 +332,16 @@ bool ObjectDataViewModelNode::SetValue(const wxVariant& variant, unsigned col)
         m_variable_height_icon << variant;
         return true;
     case colName: {
+        if (variant.GetType() != wxT("DataViewBitmapText"))
+            return false;
         DataViewBitmapText data;
         data << variant;
         m_bmp = data.GetBitmap();
         m_name = data.GetText();
         return true; }
     case colFilament: {
+        if (variant.GetType() != wxT("DataViewBitmapText"))
+            return false;
         DataViewBitmapText data;
         data << variant;
         m_extruder_bmp = data.GetBitmap();