GCodeViewer -> Draw alphed extrusion paths into legend when set as not visible

src/slic3r/GUI/GCodeViewer.cpp

@@ -33,8 +33,7 @@ static GCodeProcessor::EMoveType buffer_type(unsigned char id) {
     return static_cast<GCodeProcessor::EMoveType>(static_cast<unsigned char>(GCodeProcessor::EMoveType::Retract) + id);
 }
 
-std::vector<std::array<float, 3>> decode_colors(const std::vector<std::string>& colors)
+std::vector<std::array<float, 3>> decode_colors(const std::vector<std::string>& colors) {
-{
     static const float INV_255 = 1.0f / 255.0f;
 
     std::vector<std::array<float, 3>> output(colors.size(), {0.0f, 0.0f, 0.0f} );
@@ -67,6 +66,10 @@ void GCodeViewer::VBuffer::reset()
     vertices_count = 0;
 }
 
+bool GCodeViewer::Path::is_path_visible(unsigned int flags, const Path& path) {
+    return Extrusions::is_role_visible(flags, path.role);
+};
+
 void GCodeViewer::IBuffer::reset()
 {
     // release gpu memory
@@ -509,10 +512,6 @@ void GCodeViewer::render_toolpaths() const
         BOOST_LOG_TRIVIAL(error) << "Unable to find uniform_color uniform";
     };
 
-    auto is_path_visible = [](unsigned int flags, const Path& path) {
-        return Extrusions::is_role_visible(flags, path.role);
-    };
-
     glsafe(::glCullFace(GL_BACK));
     glsafe(::glLineWidth(3.0f));
 
@@ -600,7 +599,7 @@ void GCodeViewer::render_toolpaths() const
             case GCodeProcessor::EMoveType::Extrude:
             {
                 for (const Path& path : buffer.paths) {
-                    if (!is_path_visible(m_extrusions.role_visibility_flags, path))
+                    if (!Path::is_path_visible(m_extrusions.role_visibility_flags, path))
                         continue;
 
                     set_color(current_program_id, extrusion_color(path));
@@ -713,7 +712,13 @@ void GCodeViewer::render_overlay() const
     case EViewType::FeatureType:
     {
         for (ExtrusionRole role : m_roles) {
+            bool visible = m_extrusions.is_role_visible(role);
+            if (!visible)
+                ImGui::PushStyleVar(ImGuiStyleVar_Alpha, 0.3333f);
+
             add_item(Extrusion_Role_Colors[static_cast<unsigned int>(role)], I18N::translate_utf8(ExtrusionEntity::role_to_string(role)));
+            if (!visible)
+                ImGui::PopStyleVar();
         }
         break;
     }

src/slic3r/GUI/GCodeViewer.hpp

@@ -54,6 +54,8 @@ class GCodeViewer
                 feedrate == move.feedrate && fan_speed == move.fan_speed && volumetric_rate == move.volumetric_rate() &&
                 extruder_id == move.extruder_id && cp_color_id == move.cp_color_id;
         }
+
+        static bool is_path_visible(unsigned int flags, const Path& path);
     };
 
     // buffer containing indices data and shader for a specific toolpath type
@@ -130,6 +132,10 @@ class GCodeViewer
 
         void reset_ranges() { ranges.reset(); }
 
+        bool is_role_visible(ExtrusionRole role) const {
+            return role < erCount && (role_visibility_flags & (1 << role)) != 0;
+        }
+
         static bool is_role_visible(unsigned int flags, ExtrusionRole role) {
             return role < erCount && (flags & (1 << role)) != 0;
         }

src/slic3r/GUI/GUI_Preview.cpp

@@ -332,7 +332,7 @@ bool Preview::init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view
 
 #if ENABLE_GCODE_VIEWER
     m_combochecklist_options = new wxComboCtrl();
-    m_combochecklist_options->Create(this, wxID_ANY, _(L("Options")), wxDefaultPosition, wxSize(15 * wxGetApp().em_unit(), -1), wxCB_READONLY);
+    m_combochecklist_options->Create(this, wxID_ANY, _(L("Others")), wxDefaultPosition, wxSize(15 * wxGetApp().em_unit(), -1), wxCB_READONLY);
     std::string options_items = GUI::into_u8(
         _(L("Travel")) + "|0|" +
         _(L("Retractions")) + "|0|" +
@@ -344,7 +344,7 @@ bool Preview::init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view
         _(L("Shells")) + "|0|" +
         _(L("Legend")) + "|1"
     );
-    Slic3r::GUI::create_combochecklist(m_combochecklist_options, GUI::into_u8(_(L("Options"))), options_items);
+    Slic3r::GUI::create_combochecklist(m_combochecklist_options, GUI::into_u8(_(L("Others"))), options_items);
 #else
     m_checkbox_travel = new wxCheckBox(this, wxID_ANY, _(L("Travel")));
     m_checkbox_retractions = new wxCheckBox(this, wxID_ANY, _(L("Retractions")));