add chamber_temperature (expert, filament setting)

It doesn't do anything, but can be used to write custom g-code.
Ex: M191 S[chamber_temperature]

src/libslic3r/Print.cpp

@@ -98,6 +98,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
         "avoid_crossing_perimeters",
         "bed_shape",
         "bed_temperature",
+        "chamber_temperature",
         "before_layer_gcode",
         "between_objects_gcode",
         "bridge_acceleration",

src/libslic3r/PrintConfig.cpp

@@ -96,6 +96,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("Bed temperature for layers after the first one. "
                    "Set this to zero to disable bed temperature control commands in the output.");
     def->cli = "bed-temperature=i@";
+    def->sidetext = L("°C");
     def->min = 0;
     def->max = 300;
     def->default_value = new ConfigOptionInts { 0 };
@@ -237,6 +238,17 @@ void PrintConfigDef::init_fff_params()
     def->max = 180;
     def->default_value = new ConfigOptionFloat(125);
 
+    def = this->add("chamber_temperature", coInts);
+    def->label = L("Chamber");
+    def->full_label = L("Chamber temperature");
+    def->tooltip = L("Chamber temperature0. Note that this setting doesn't do anything, but you can access it in Start G-code, Tool change G-code and the other ones, like for other temperature settings.");
+    def->cli = "chamber-temperature=i@";
+    def->sidetext = L("°C");
+    def->min = 0;
+    def->max = 300;
+    def->mode = comExpert;
+    def->default_value = new ConfigOptionInts{ 0 };
+
     def = this->add("clip_multipart_objects", coBool);
     def->label = L("Clip multi-part objects");
     def->tooltip = L("When printing multi-material objects, this settings will make slic3r "
@@ -1074,6 +1086,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("Heated build plate temperature for the first layer. Set this to zero to disable "
                    "bed temperature control commands in the output.");
     def->cli = "first-layer-bed-temperature=i@";
+    def->sidetext = L("°C");
     def->max = 0;
     def->max = 300;
     def->default_value = new ConfigOptionInts { 0 };
@@ -1138,6 +1151,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("Extruder temperature for first layer. If you want to control temperature manually "
                    "during print, set this to zero to disable temperature control commands in the output file.");
     def->cli = "first-layer-temperature=i@";
+    def->sidetext = L("°C");
     def->min = 0;
     def->max = max_temp;
     def->default_value = new ConfigOptionInts{ 200 };
@@ -2603,6 +2617,7 @@ void PrintConfigDef::init_fff_params()
                    "temperature control commands in the output.");
     def->cli = "temperature=i@";
     def->full_label = L("Temperature");
+    def->sidetext = L("°C");
     def->min = 0;
     def->max = max_temp;
     def->default_value = new ConfigOptionInts { 200 };

src/libslic3r/PrintConfig.hpp

@@ -895,10 +895,10 @@ public:
     ConfigOptionInts                bed_temperature;
     ConfigOptionFloat               bridge_acceleration;
     ConfigOptionInts                bridge_fan_speed;
-    ConfigOptionInts                top_fan_speed;
     ConfigOptionFloat               brim_width;
     ConfigOptionBool                brim_ears;
     ConfigOptionFloat               brim_ears_max_angle;
+    ConfigOptionInts                chamber_temperature;
     ConfigOptionBool                complete_objects;
     ConfigOptionFloats              colorprint_heights;
     ConfigOptionBools               cooling;
@@ -947,6 +947,7 @@ public:
     ConfigOptionInt                 standby_temperature_delta;
     ConfigOptionInts                temperature;
     ConfigOptionInt                 threads;
+    ConfigOptionInts                top_fan_speed;
     ConfigOptionBools               wipe;
     ConfigOptionBool                wipe_tower;
     ConfigOptionFloat               wipe_tower_x;
@@ -976,10 +977,10 @@ protected:
         OPT_PTR(bed_temperature);
         OPT_PTR(bridge_acceleration);
         OPT_PTR(bridge_fan_speed);
-        OPT_PTR(top_fan_speed);
         OPT_PTR(brim_width);
         OPT_PTR(brim_ears);
         OPT_PTR(brim_ears_max_angle);
+        OPT_PTR(chamber_temperature);
         OPT_PTR(complete_objects);
         OPT_PTR(colorprint_heights);
         OPT_PTR(cooling);
@@ -1028,6 +1029,7 @@ protected:
         OPT_PTR(standby_temperature_delta);
         OPT_PTR(temperature);
         OPT_PTR(threads);
+        OPT_PTR(top_fan_speed);
         OPT_PTR(wipe);
         OPT_PTR(wipe_tower);
         OPT_PTR(wipe_tower_x);

src/slic3r/GUI/Preset.cpp

@@ -440,7 +440,8 @@ const std::vector<std::string>& Preset::filament_options()
         "min_print_speed", "start_filament_gcode", "end_filament_gcode",
         "compatible_prints", "compatible_prints_condition",
         "compatible_printers", "compatible_printers_condition", "inherits"
-        , "filament_wipe_advanced_pigment"
+        , "filament_wipe_advanced_pigment",
+		"chamber_temperature"
     };
     return s_opts;
 }

src/slic3r/GUI/Tab.cpp

@@ -1544,6 +1544,8 @@ void TabFilament::build()
 		line.append_option(optgroup->get_option("first_layer_bed_temperature"));
 		line.append_option(optgroup->get_option("bed_temperature"));
 		optgroup->append_line(line);
+		
+		optgroup->append_single_option_line("chamber_temperature");
 
 	page = add_options_page(_(L("Cooling")), "hourglass.png");
 		optgroup = page->new_optgroup(_(L("Enable")));