Show a notification when attempting to slice during SLA support points editing

This should also fix #5736 and a similar crash when deleting an object during manual editing (which was introduced between 2.2.0 and 2.3.0)

src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp

@@ -903,7 +903,7 @@ void GLGizmoSlaSupports::on_set_state()
         m_new_point_head_diameter = static_cast<const ConfigOptionFloat*>(cfg.option("support_head_front_diameter"))->value;
     }
     if (m_state == Off && m_old_state != Off) { // the gizmo was just turned Off
-        bool will_ask = m_editing_mode && unsaved_changes();
+        bool will_ask = m_editing_mode && unsaved_changes() && on_is_activable();
         if (will_ask) {
             wxGetApp().CallAfter([this]() {
                 // Following is called through CallAfter, because otherwise there was a problem

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -7,6 +7,7 @@
 #include "slic3r/GUI/GUI_ObjectManipulation.hpp"
 #include "slic3r/GUI/Plater.hpp"
 #include "slic3r/Utils/UndoRedo.hpp"
+#include "slic3r/GUI/NotificationManager.hpp"
 
 #include "slic3r/GUI/Gizmos/GLGizmoMove.hpp"
 #include "slic3r/GUI/Gizmos/GLGizmoScale.hpp"
@@ -1139,5 +1140,19 @@ bool GLGizmosManager::grabber_contains_mouse() const
     return (curr != nullptr) ? (curr->get_hover_id() != -1) : false;
 }
 
+
+bool GLGizmosManager::is_in_editing_mode(bool error_notification) const
+{
+    if (m_current != SlaSupports || ! dynamic_cast<GLGizmoSlaSupports*>(get_current())->is_in_editing_mode())
+        return false;
+
+    if (error_notification)
+        wxGetApp().plater()->get_notification_manager()->push_slicing_error_notification(
+            _u8L("You are currently editing SLA support points. Please, apply or discard "
+                 "your changes first."));
+
+    return true;
+}
+
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/Gizmos/GLGizmosManager.hpp

@@ -210,6 +210,8 @@ public:
     ClippingPlane get_clipping_plane() const;
     bool wants_reslice_supports_on_undo() const;
 
+    bool is_in_editing_mode(bool error_notification = false) const;
+
     void render_current_gizmo() const;
     void render_current_gizmo_for_picking_pass() const;
     void render_painter_gizmo() const;

src/slic3r/GUI/Plater.cpp

@@ -790,6 +790,9 @@ Sidebar::Sidebar(Plater *parent)
     p->btn_export_gcode->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { p->plater->export_gcode(false); });
     p->btn_reslice->Bind(wxEVT_BUTTON, [this](wxCommandEvent&)
     {
+        if (p->plater->canvas3D()->get_gizmos_manager().is_in_editing_mode(true))
+            return;
+
         const bool export_gcode_after_slicing = wxGetKeyState(WXK_SHIFT);
         if (export_gcode_after_slicing)
             p->plater->export_gcode(true);
@@ -4214,9 +4217,9 @@ bool Plater::priv::can_fix_through_netfabb() const
 
 bool Plater::priv::can_increase_instances() const
 {
-    if (m_ui_jobs.is_any_running()) {
-        return false;
-    }
+    if (m_ui_jobs.is_any_running()
+     || q->canvas3D()->get_gizmos_manager().is_in_editing_mode())
+            return false;
 
     int obj_idx = get_selected_object_idx();
     return (0 <= obj_idx) && (obj_idx < (int)model.objects.size());
@@ -4224,9 +4227,9 @@ bool Plater::priv::can_increase_instances() const
 
 bool Plater::priv::can_decrease_instances() const
 {
-    if (m_ui_jobs.is_any_running()) {
-        return false;
-    }
+    if (m_ui_jobs.is_any_running()
+     || q->canvas3D()->get_gizmos_manager().is_in_editing_mode())
+            return false;
 
     int obj_idx = get_selected_object_idx();
     return (0 <= obj_idx) && (obj_idx < (int)model.objects.size()) && (model.objects[obj_idx]->instances.size() > 1);
@@ -5116,6 +5119,10 @@ void Plater::export_gcode(bool prefer_removable)
     if (p->model.objects.empty())
         return;
 
+    if (canvas3D()->get_gizmos_manager().is_in_editing_mode(true))
+        return;
+
+
     if (p->process_completed_with_error)
         return;
 
@@ -5391,6 +5398,11 @@ void Plater::reslice()
     if (p->process_completed_with_error)
         return;
 
+    // In case SLA gizmo is in editing mode, refuse to continue
+    // and notify user that he should leave it first.
+    if (canvas3D()->get_gizmos_manager().is_in_editing_mode(true))
+        return;
+
     // Stop arrange and (or) optimize rotation tasks.
     this->stop_jobs();