Auto color change improvements: Show info notification just ones, if there is new print

src/slic3r/GUI/DoubleSlider.cpp

@@ -424,6 +424,22 @@ void Control::SetExtruderColors( const std::vector<std::string>& extruder_colors
     m_extruder_colors = extruder_colors;
 }
 
+bool Control::IsNewPrint()
+{
+    if (GUI::wxGetApp().plater()->printer_technology() == ptSLA)
+        return false;
+    const Print& print = GUI::wxGetApp().plater()->fff_print();
+    std::string idxs;
+    for (auto object : print.objects())
+        idxs += std::to_string(object->id().id) + "_";
+
+    if (idxs == m_print_obj_idxs)
+        return false;
+
+    m_print_obj_idxs = idxs;
+    return true;
+}
+
 void Control::get_lower_and_higher_position(int& lower_pos, int& higher_pos)
 {
     const double step = get_scroll_step();

src/slic3r/GUI/DoubleSlider.hpp

@@ -233,6 +233,8 @@ public:
     void    SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model, const int only_extruder);
     void    SetExtruderColors(const std::vector<std::string>& extruder_colors);
 
+    bool    IsNewPrint();
+
     void set_render_as_disabled(bool value) { m_render_as_disabled = value; }
     bool is_rendering_as_disabled() const { return m_render_as_disabled; }
 
@@ -395,6 +397,7 @@ private:
     TickCodeInfo        m_ticks;
     std::vector<double> m_layers_times;
     std::vector<std::string>    m_extruder_colors;
+    std::string         m_print_obj_idxs;
 
 #if ENABLE_GCODE_LINES_ID_IN_H_SLIDER
     std::vector<double> m_alternate_values;

src/slic3r/GUI/GUI_Preview.cpp

@@ -1,3 +1,4 @@
+//#include "stdlib.h"
 #include "libslic3r/libslic3r.h"
 #include "libslic3r/Layer.hpp"
 #include "GUI_Preview.hpp"
@@ -642,10 +643,10 @@ void Preview::update_layers_slider(const std::vector<double>& layers_z, bool kee
         m_layers_slider->SetLayersTimes(m_gcode_result->time_statistics.modes.front().layers_times);
 
     // Suggest the auto color change, if model looks like sign
-    if (ticks_info_from_model.gcodes.empty())
+    if (m_layers_slider->IsNewPrint())
     {
         NotificationManager* notif_mngr = wxGetApp().plater()->get_notification_manager();
-        notif_mngr->close_notification_of_type(NotificationType::SignDetected);
+//        notif_mngr->close_notification_of_type(NotificationType::SignDetected);
 
         const Print& print = wxGetApp().plater()->fff_print();
         double delta_area = scale_(scale_(25)); // equal to 25 mm2
@@ -658,8 +659,8 @@ void Preview::update_layers_slider(const std::vector<double>& layers_z, bool kee
                 continue;
 
             const ExPolygons& bottom = object->get_layer(0)->lslices;
-            if (bottom.size() > 1 || !bottom[0].holes.empty())
+            //if (bottom.size() > 1 || !bottom[0].holes.empty())
-                continue;
+            //    continue;
 
             double bottom_area = area(bottom);
             int i;