move warning about complete object from pop-up to red foreground message.

src/PrusaSlicer.cpp

@@ -425,9 +425,9 @@ int CLI::run(int argc, char **argv)
                         fff_print.auto_assign_extruders(mo);
                 }
                 print->apply(model, m_print_config);
-                std::string err = print->validate();
+                std::pair<PrintError, std::string> err = print->validate();
-                if (! err.empty()) {
+                if (! err.first == PrintError::None) {
-                    boost::nowide::cerr << err << std::endl;
+                    boost::nowide::cerr << err.second << std::endl;
                     return 1;
                 }
                 if (print->empty())

src/libslic3r/Print.cpp

@@ -1273,19 +1273,19 @@ static inline bool sequential_print_vertical_clearance_valid(const Print &print)
 }
 
 // Precondition: Print::validate() requires the Print::apply() to be called its invocation.
-std::string Print::validate() const
+std::pair<PrintError, std::string> Print::validate() const
 {
     if (m_objects.empty())
-        return L("All objects are outside of the print volume.");
+        return { PrintError::WrongPosition, L("All objects are outside of the print volume.") };
 
     if (extruders().empty())
-        return L("The supplied settings will cause an empty print.");
+        return { PrintError::NoPrint, L("The supplied settings will cause an empty print.") };
 
     if (m_config.complete_objects) {
     	if (! sequential_print_horizontal_clearance_valid(*this))
-            return L("Some objects are too close; your extruder will collide with them.");
+            return { PrintError::WrongPosition, L("Some objects are too close; your extruder will collide with them.") };
         if (! sequential_print_vertical_clearance_valid(*this))
-	        return L("Some objects are too tall and cannot be printed without extruder collisions.");
+            return { PrintError::WrongPosition,L("Some objects are too tall and cannot be printed without extruder collisions.") };
     }
 
     if (m_config.spiral_vase) {
@@ -1294,14 +1294,14 @@ std::string Print::validate() const
             total_copies_count += object->instances().size();
         // #4043
         if (total_copies_count > 1 && ! m_config.complete_objects.value)
-            return L("The Spiral Vase option can only be used when printing a single object.");
+            return { PrintError::WrongSettings,L("The Spiral Vase option can only be used when printing a single object.") };
         assert(m_objects.size() == 1 || config().complete_objects.value);
         size_t num_regions = 0;
         for (const std::vector<std::pair<t_layer_height_range, int>> &volumes_per_region : m_objects.front()->region_volumes)
         	if (! volumes_per_region.empty())
         		++ num_regions;
         if (num_regions > 1)
-            return L("The Spiral Vase option can only be used when printing single material objects.");
+            return { PrintError::WrongSettings,L("The Spiral Vase option can only be used when printing single material objects.") };
     }
 
     if (this->has_wipe_tower() && ! m_objects.empty()) {
@@ -1314,21 +1314,21 @@ std::string Print::validate() const
             double filament_diam = m_config.filament_diameter.get_at(extruder_idx);
             if (nozzle_diam - EPSILON > first_nozzle_diam || nozzle_diam + EPSILON < first_nozzle_diam
              || std::abs((filament_diam-first_filament_diam)/first_filament_diam) > 0.1)
-                 return L("The wipe tower is only supported if all extruders have the same nozzle diameter "
+                return { PrintError::WrongSettings,L("The wipe tower is only supported if all extruders have the same nozzle diameter "
-                          "and use filaments of the same diameter.");
+                         "and use filaments of the same diameter.") };
         }
 
         if (m_config.gcode_flavor != gcfRepRap && m_config.gcode_flavor != gcfRepetier && m_config.gcode_flavor != gcfMarlin
             && m_config.gcode_flavor != gcfKlipper)
-            return L("The Wipe Tower is currently only supported for the Marlin, RepRap/Sprinter and Repetier G-code flavors.");
+            return { PrintError::WrongSettings,L("The Wipe Tower is currently only supported for the Marlin, RepRap/Sprinter and Repetier G-code flavors.") };
         if (! m_config.use_relative_e_distances)
-            return L("The Wipe Tower is currently only supported with the relative extruder addressing (use_relative_e_distances=1).");
+            return { PrintError::WrongSettings,L("The Wipe Tower is currently only supported with the relative extruder addressing (use_relative_e_distances=1).") };
         if (m_config.ooze_prevention)
-            return L("Ooze prevention is currently not supported with the wipe tower enabled.");
+            return { PrintError::WrongSettings,L("Ooze prevention is currently not supported with the wipe tower enabled.") };
         if (m_config.use_volumetric_e)
-            return L("The Wipe Tower currently does not support volumetric E (use_volumetric_e=0).");
+            return { PrintError::WrongSettings,L("The Wipe Tower currently does not support volumetric E (use_volumetric_e=0).") };
         if (m_config.complete_objects && extruders().size() > 1)
-            return L("The Wipe Tower is currently not supported for multimaterial sequential prints.");
+            return { PrintError::WrongSettings,L("The Wipe Tower is currently not supported for multimaterial sequential prints.") };
         
         if (m_objects.size() > 1) {
             bool                                has_custom_layering = false;
@@ -1349,15 +1349,15 @@ std::string Print::validate() const
                 const SlicingParameters &slicing_params = object->slicing_parameters();
             if (std::abs(slicing_params.first_print_layer_height - slicing_params0.first_print_layer_height) > EPSILON ||
                 std::abs(slicing_params.layer_height             - slicing_params0.layer_height            ) > EPSILON)
-                    return L("The Wipe Tower is only supported for multiple objects if they have equal layer heights");
+                return { PrintError::WrongSettings,L("The Wipe Tower is only supported for multiple objects if they have equal layer heights") };
             if (slicing_params.raft_layers() != slicing_params0.raft_layers())
-                return L("The Wipe Tower is only supported for multiple objects if they are printed over an equal number of raft layers");
+                return { PrintError::WrongSettings,L("The Wipe Tower is only supported for multiple objects if they are printed over an equal number of raft layers") };
             if (object->config().support_material_contact_distance_type != m_objects.front()->config().support_material_contact_distance_type
                 || object->config().support_material_contact_distance_top != m_objects.front()->config().support_material_contact_distance_top
                 || object->config().support_material_contact_distance_bottom != m_objects.front()->config().support_material_contact_distance_bottom)
-                return L("The Wipe Tower is only supported for multiple objects if they are printed with the same support_material_contact_distance");
+                return { PrintError::WrongSettings,L("The Wipe Tower is only supported for multiple objects if they are printed with the same support_material_contact_distance") };
             if (! equal_layering(slicing_params, slicing_params0))
-                return L("The Wipe Tower is only supported for multiple objects if they are sliced equally.");
+                return { PrintError::WrongSettings,L("The Wipe Tower is only supported for multiple objects if they are sliced equally.") };
                 if (has_custom_layering) {
                     PrintObject::update_layer_height_profile(*object->model_object(), slicing_params, layer_height_profiles[i]);
                     if (*(layer_height_profiles[i].end()-2) > *(layer_height_profiles[tallest_object_idx].end()-2))
@@ -1399,7 +1399,7 @@ std::string Print::validate() const
                             } while (ref_z == next_ref_z);
                         }
                         if (std::abs(this_height - ref_height) > EPSILON)
-                            return L("The Wipe tower is only supported if all objects have the same variable layer height");
+                            return { PrintError::WrongSettings,L("The Wipe tower is only supported if all objects have the same variable layer height") };
                         i += 2;
                     }
                 }
@@ -1448,20 +1448,20 @@ std::string Print::validate() const
                     // The object has some form of support and either support_material_extruder or support_material_interface_extruder
                     // will be printed with the current tool without a forced tool change. Play safe, assert that all object nozzles
                     // are of the same diameter.
-                    return L("Printing with multiple extruders of differing nozzle diameters. "
+                    return { PrintError::WrongSettings,L("Printing with multiple extruders of differing nozzle diameters. "
                            "If support is to be printed with the current extruder (support_material_extruder == 0 or support_material_interface_extruder == 0), "
-                           "all nozzles have to be of the same diameter.");
+                           "all nozzles have to be of the same diameter.") };
                 }
                 if (this->has_wipe_tower()) {
                     if (object->config().support_material_contact_distance_type == zdNone) {
                         // Soluble interface
                         if (! object->config().support_material_synchronize_layers)
-                            return L("For the Wipe Tower to work with the soluble supports, the support layers need to be synchronized with the object layers.");
+                            return { PrintError::WrongSettings,L("For the Wipe Tower to work with the soluble supports, the support layers need to be synchronized with the object layers.") };
                     } else {
                         // Non-soluble interface
                         if (object->config().support_material_extruder != 0 || object->config().support_material_interface_extruder != 0)
-                            return L("The Wipe Tower currently supports the non-soluble supports only if they are printed with the current extruder without triggering a tool change. "
+                            return { PrintError::WrongSettings,L("The Wipe Tower currently supports the non-soluble supports only if they are printed with the current extruder without triggering a tool change. "
-                                     "(both support_material_extruder and support_material_interface_extruder need to be set to 0).");
+                                     "(both support_material_extruder and support_material_interface_extruder need to be set to 0).") };
                     }
                 }
             }
@@ -1482,27 +1482,27 @@ std::string Print::validate() const
                 first_layer_min_nozzle_diameter = min_nozzle_diameter;
             }
             if (first_layer_height > first_layer_min_nozzle_diameter)
-                return L("First layer height can't be greater than nozzle diameter");
+                return { PrintError::WrongSettings,L("First layer height can't be greater than nozzle diameter") };
             
             // validate layer_height
             double layer_height = object->config().layer_height.value;
             if (layer_height > min_nozzle_diameter)
-                return L("Layer height can't be greater than nozzle diameter");
+                return { PrintError::WrongSettings,L("Layer height can't be greater than nozzle diameter") };
 
             // Validate extrusion widths.
             std::string err_msg;
             if (! validate_extrusion_width(object->config(), "extrusion_width", layer_height, err_msg))
-            	return err_msg;
+                return { PrintError::WrongSettings,err_msg };
             if ((object->config().support_material || object->config().raft_layers > 0) && ! validate_extrusion_width(object->config(), "support_material_extrusion_width", layer_height, err_msg))
-            	return err_msg;
+                return { PrintError::WrongSettings,err_msg };
             for (const char *opt_key : { "perimeter_extrusion_width", "external_perimeter_extrusion_width", "infill_extrusion_width", "solid_infill_extrusion_width", "top_infill_extrusion_width" })
 				for (size_t i = 0; i < object->region_volumes.size(); ++ i)
             		if (! object->region_volumes[i].empty() && ! validate_extrusion_width(this->get_region(i)->config(), opt_key, layer_height, err_msg))
-		            	return err_msg;
+                        return { PrintError::WrongSettings, err_msg };
         }
     }
 
-    return std::string();
+    return { PrintError::None, std::string() };
 }
 
 #if 0

src/libslic3r/Print.hpp

@@ -399,7 +399,7 @@ public:
     bool                has_skirt() const;
 
     // Returns an empty string if valid, otherwise returns an error message.
-    std::string         validate() const override;
+    std::pair<PrintError, std::string> validate() const override;
     double              skirt_first_layer_height() const;
     Flow                brim_flow(size_t extruder_id) const;
     Flow                skirt_flow(size_t extruder_id) const;

src/libslic3r/PrintBase.hpp

@@ -203,6 +203,13 @@ protected:
     ModelObject                  *m_model_object;
 };
 
+enum PrintError {
+    None,
+    WrongPosition,
+    NoPrint,
+    WrongSettings,
+};
+
 /**
  * @brief Printing involves slicing and export of device dependent instructions.
  *
@@ -229,7 +236,7 @@ public:
     virtual bool            empty() const = 0;
 
     // Validate the print, return empty string if valid, return error if process() cannot (or should not) be started.
-    virtual std::string     validate() const { return std::string(); }
+    virtual std::pair<PrintError, std::string> validate() const { return { PrintError::None, std::string() }; }
 
     enum ApplyStatus {
         // No change after the Print::apply() call.

src/libslic3r/SLAPrint.cpp

@@ -602,7 +602,7 @@ std::string SLAPrint::output_filename(const std::string &filename_base) const
     return this->PrintBase::output_filename(m_print_config.output_filename_format.value, ".sl1", filename_base, &config);
 }
 
-std::string SLAPrint::validate() const
+std::pair<PrintError, std::string>SLAPrint::validate() const
 {
     for(SLAPrintObject * po : m_objects) {
 
@@ -612,8 +612,8 @@ std::string SLAPrint::validate() const
         if(supports_en &&
            mo->sla_points_status == sla::PointsStatus::UserModified &&
            mo->sla_support_points.empty())
-            return L("Cannot proceed without support points! "
+            return { PrintError::WrongSettings, L("Cannot proceed without support points! "
-                     "Add support points or disable support generation.");
+                     "Add support points or disable support generation.") };
 
         sla::SupportConfig cfg = make_support_cfg(po->config());
 
@@ -623,21 +623,21 @@ std::string SLAPrint::validate() const
         sla::PadConfig::EmbedObject &builtinpad = padcfg.embed_object;
         
         if(supports_en && !builtinpad.enabled && elv < cfg.head_fullwidth())
-            return L(
+            return { PrintError::WrongSettings, L(
                 "Elevation is too low for object. Use the \"Pad around "
-                "object\" feature to print the object without elevation.");
+                "object\" feature to print the object without elevation.") };
         
         if(supports_en && builtinpad.enabled &&
            cfg.pillar_base_safety_distance_mm < builtinpad.object_gap_mm) {
-            return L(
+            return { PrintError::WrongSettings, L(
                 "The endings of the support pillars will be deployed on the "
                 "gap between the object and the pad. 'Support base safety "
                 "distance' has to be greater than the 'Pad object gap' "
-                "parameter to avoid this.");
+                "parameter to avoid this.") };
         }
         
         std::string pval = padcfg.validate();
-        if (!pval.empty()) return pval;
+        if (!pval.empty()) return { PrintError::WrongSettings, pval };
     }
 
     double expt_max = m_printer_config.max_exposure_time.getFloat();
@@ -645,16 +645,16 @@ std::string SLAPrint::validate() const
     double expt_cur = m_material_config.exposure_time.getFloat();
 
     if (expt_cur < expt_min || expt_cur > expt_max)
-        return L("Exposition time is out of printer profile bounds.");
+        return { PrintError::WrongSettings, L("Exposition time is out of printer profile bounds.") };
 
     double iexpt_max = m_printer_config.max_initial_exposure_time.getFloat();
     double iexpt_min = m_printer_config.min_initial_exposure_time.getFloat();
     double iexpt_cur = m_material_config.initial_exposure_time.getFloat();
 
     if (iexpt_cur < iexpt_min || iexpt_cur > iexpt_max)
-        return L("Initial exposition time is out of printer profile bounds.");
+        return { PrintError::WrongSettings, L("Initial exposition time is out of printer profile bounds.") };
 
-    return "";
+    return { PrintError::None, "" };
 }
 
 bool SLAPrint::invalidate_step(SLAPrintStep step)

src/libslic3r/SLAPrint.hpp

@@ -432,7 +432,7 @@ public:
 
     const SLAPrintStatistics&   print_statistics() const { return m_print_statistics; }
 
-    std::string validate() const override;
+    std::pair<PrintError, std::string> validate() const override;
 
     // An aggregation of SliceRecord-s from all the print objects for each
     // occupied layer. Slice record levels dont have to match exactly.

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -373,7 +373,7 @@ bool BackgroundSlicingProcess::empty() const
 	return m_print->empty();
 }
 
-std::string BackgroundSlicingProcess::validate()
+std::pair<PrintError, std::string> BackgroundSlicingProcess::validate()
 {
 	assert(m_print != nullptr);
 	return m_print->validate();

src/slic3r/GUI/BackgroundSlicingProcess.hpp

@@ -92,9 +92,9 @@ public:
 	void 		set_task(const PrintBase::TaskParams &params);
 	// After calling apply, the empty() call will report whether there is anything to slice.
 	bool 		empty() const;
-	// Validate the print. Returns an empty string if valid, returns an error message if invalid.
+	// Validate the print. Returns a {PrintError::None,empty string} if valid, returns an error message if invalid.
 	// Call validate before calling start().
-	std::string validate();
+	std::pair<PrintError, std::string> validate();
 
 	// Set the export path of the G-code.
 	// Once the path is set, the G-code 

src/slic3r/GUI/GLCanvas3D.cpp

@@ -658,7 +658,7 @@ GLCanvas3D::WarningTexture::WarningTexture()
 {
 }
 
-void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool state, const GLCanvas3D& canvas)
+void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool state, const GLCanvas3D& canvas, std::string str_override)
 {
     auto it = std::find(m_warnings.begin(), m_warnings.end(), warning);
 
@@ -682,8 +682,9 @@ void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool
     }
 
     // Look at the end of our vector and generate proper texture.
-    std::string text;
+    std::string text = str_override;
     bool red_colored = false;
+    if (text.empty()) {
         switch (m_warnings.back()) {
         case ObjectOutside: text = L("An object outside the print area was detected"); break;
         case ToolpathOutside: text = L("A toolpath outside the print area was detected"); break;
@@ -695,6 +696,10 @@ void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool
             red_colored = true;
             break;
         }
+        default: text = L("An error occured");
+        }
+    } else {
+        red_colored = true;
     }
 
     generate(text, canvas, true, red_colored); // GUI::GLTexture::reset() is called at the beginning of generate(...)

src/slic3r/GUI/GLCanvas3D.hpp

@@ -314,12 +314,13 @@ private:
             ToolpathOutside,
             SlaSupportsOutside,
             SomethingNotShown,
+            PrintWarning,
             ObjectClashed
         };
 
         // Sets a warning of the given type to be active/inactive. If several warnings are active simultaneously,
         // only the last one is shown (decided by the order in the enum above).
-        void activate(WarningTexture::Warning warning, bool state, const GLCanvas3D& canvas);
+        void activate(WarningTexture::Warning warning, bool state, const GLCanvas3D& canvas, std::string str_override = "");
         void render(const GLCanvas3D& canvas) const;
 
         // function used to get an information for rescaling of the warning
@@ -699,6 +700,13 @@ public:
     bool are_labels_shown() const { return m_labels.is_shown(); }
     void show_labels(bool show) { m_labels.show(show); }
 
+    void show_print_warning(std::string str) { 
+        if (str.empty())
+            m_warning_texture.activate(WarningTexture::Warning::PrintWarning, false, *this);
+        else 
+            m_warning_texture.activate(WarningTexture::Warning::PrintWarning, true, *this, str); 
+    }
+
 private:
     bool _is_shown_on_screen() const;
 

src/slic3r/GUI/Plater.cpp

@@ -3165,8 +3165,9 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
 		// The delayed error message is no more valid.
 		this->delayed_error_message.clear();
         // The state of the Print changed, and it is non-zero. Let's validate it and give the user feedback on errors.
-        std::string err = this->background_process.validate();
+        std::pair<PrintError, std::string> err = this->background_process.validate();
-        if (err.empty()) {
+        this->get_current_canvas3D()->show_print_warning("");
+        if (err.first == PrintError::None) {
             if (invalidated != Print::APPLY_STATUS_UNCHANGED && this->background_processing_enabled())
                 return_state |= UPDATE_BACKGROUND_PROCESS_RESTART;
         } else {
@@ -3176,12 +3177,14 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
             while (p->GetParent())
                 p = p->GetParent();
             auto *top_level_wnd = dynamic_cast<wxTopLevelWindow*>(p);
-            if (! postpone_error_messages && top_level_wnd && top_level_wnd->IsActive()) {
+            if ( (err.first == PrintError::WrongPosition || err.first == PrintError::NoPrint)  && top_level_wnd && top_level_wnd->IsActive()) {
+                this->get_current_canvas3D()->show_print_warning(err.second);
+            } else if (!postpone_error_messages && top_level_wnd && top_level_wnd->IsActive()) {
                 // The error returned from the Print needs to be translated into the local language.
-                GUI::show_error(this->q, err);
+                GUI::show_error(this->q, err.second);
             } else {
                 // Show the error message once the main window gets activated.
-                this->delayed_error_message = err;
+                this->delayed_error_message = err.second;
             }
             return_state |= UPDATE_BACKGROUND_PROCESS_INVALID;
         }