ENH: add params for filament retract when extruder change

jira: STUDIO-11965

Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: Id175e9dbce419d43cf45d6116ed4fa4fd556f606
(cherry picked from commit c7964441719f521d1a20dc9f084a7598bd01a9a5)

src/libslic3r/PrintConfig.cpp

@@ -4461,6 +4461,20 @@ void PrintConfigDef::init_fff_params()
     def->max = 18;
     def->set_default_value(new ConfigOptionFloats {18});
 
+    def = this->add("long_retractions_when_ec", coBools);
+    def->label = L("Long retraction when extruder change");
+    def->mode = comAdvanced;
+    def->nullable = true;
+    def->set_default_value(new ConfigOptionBoolsNullable {false});
+
+    def = this->add("retraction_distances_when_ec", coFloats);
+    def->label = L("Retraction distance when extruder change");
+    def->mode = comAdvanced;
+    def->nullable = true;
+    def->min = 0;
+    def->max = 10;
+    def->set_default_value(new ConfigOptionFloatsNullable{10});
+
     def = this->add("retract_length_toolchange", coFloats);
     def->label = L("Length");
     //def->full_label = L("Retraction Length (Toolchange)");
@@ -7454,6 +7468,8 @@ std::set<std::string> filament_options_with_variant = {
     "filament_retract_before_wipe",
     "filament_long_retractions_when_cut",
     "filament_retraction_distances_when_cut",
+    "long_retractions_when_ec",
+    "retraction_distances_when_ec",
     "nozzle_temperature_initial_layer",
     "nozzle_temperature",
     "filament_flush_volumetric_speed",