FIX:add multi-color goes wrong in multi-plate case

1.new: forbidden add multicolor from preview slider if a plate uses multiple filaments in prepare
2.fix: cannot change color from preview slider if a plate uses different color with another plate.

Change-Id: I28dee0e158fab121dc888590c4cc7554900504be

src/slic3r/GUI/GUI_Preview.cpp

@@ -447,40 +447,45 @@ void Preview::update_layers_slider_mode()
     //             multi-extruder printer profile , but whole model is printed by only one extruder
     //    false -> multi-extruder printer profile , and model is printed by several extruders
     bool one_extruder_printed_model = true;
-
+    bool can_change_color = true;
     // extruder used for whole model for multi-extruder printer profile
     int only_extruder = -1;
 
     // BBS
     if (wxGetApp().filaments_cnt() > 1) {
-        const ModelObjectPtrs &objects = wxGetApp().plater()->model().objects;
+        //const ModelObjectPtrs& objects = wxGetApp().plater()->model().objects;
-
+        auto plate_extruders = wxGetApp().plater()->get_partplate_list().get_curr_plate()->get_extruders();
-        // check if whole model uses just only one extruder
+        for (auto extruder : plate_extruders) {
-        if (!objects.empty()) {
+            if (extruder != plate_extruders[0])
-            const int extruder = objects[0]->config.has("extruder") ? objects[0]->config.option("extruder")->getInt() : 0;
+                can_change_color = false;
-
-            auto is_one_extruder_printed_model = [objects, extruder]() {
-                for (ModelObject *object : objects) {
-                    if (object->config.has("extruder") && object->config.option("extruder")->getInt() != extruder) return false;
-
-                    for (ModelVolume *volume : object->volumes)
-                        if ((volume->config.has("extruder") && volume->config.option("extruder")->getInt() != extruder) || !volume->mmu_segmentation_facets.empty()) return false;
-
-                    for (const auto &range : object->layer_config_ranges)
-                        if (range.second.has("extruder") && range.second.option("extruder")->getInt() != extruder) return false;
         }
-                return true;
+        // check if whole model uses just only one extruder
-            };
+        if (!plate_extruders.empty()) {
-
+            //const int extruder = objects[0]->config.has("extruder") ? objects[0]->config.option("extruder")->getInt() : 0;
-            if (is_one_extruder_printed_model())
+            const int extruder = plate_extruders[0];
             only_extruder = extruder;
-            else
+        //    auto is_one_extruder_printed_model = [objects, extruder]() {
-                one_extruder_printed_model = false;
+        //        for (ModelObject *object : objects) {
+        //            if (object->config.has("extruder") && object->config.option("extruder")->getInt() != extruder) /*return false*/;
+
+        //            for (ModelVolume *volume : object->volumes)
+        //                if ((volume->config.has("extruder") && volume->config.option("extruder")->getInt() != extruder) || !volume->mmu_segmentation_facets.empty()) return false;
+
+        //            for (const auto &range : object->layer_config_ranges)
+        //                if (range.second.has("extruder") && range.second.option("extruder")->getInt() != extruder) return false;
+        //        }
+        //        return true;
+        //    };
+
+        //    if (is_one_extruder_printed_model())
+        //        only_extruder = extruder;
+        //    else
+        //        one_extruder_printed_model = false;
         }
     }
 
     IMSlider *m_layers_slider = m_canvas->get_gcode_viewer().get_layers_slider();
-    m_layers_slider->SetModeAndOnlyExtruder(one_extruder_printed_model, only_extruder);
+    m_layers_slider->SetModeAndOnlyExtruder(one_extruder_printed_model, only_extruder, can_change_color);
 }
 
 void Preview::update_layers_slider_from_canvas(wxKeyEvent &event)

src/slic3r/GUI/IMSlider.cpp

@@ -521,6 +521,11 @@ Info IMSlider::GetTicksValues() const
 
 void IMSlider::SetTicksValues(const Info &custom_gcode_per_print_z)
 {
+    if (!m_can_change_color) {
+        m_ticks.erase_all_ticks_with_code(ToolChange);
+        return;
+    }
+
     if (m_values.empty()) {
         m_ticks.mode = m_mode;
         return;
@@ -584,7 +589,7 @@ void IMSlider::SetDrawMode(bool is_sequential_print)
                                           dmRegular; 
 }
 
-void IMSlider::SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model, const int only_extruder)
+void IMSlider::SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model, const int only_extruder, bool can_change_color)
 {
     m_mode = !is_one_extruder_printed_model ? MultiExtruder : only_extruder < 0 ? SingleExtruder : MultiAsSingle;
     if (!m_ticks.mode || (m_ticks.empty() && m_ticks.mode != m_mode)) m_ticks.mode = m_mode;
@@ -593,6 +598,8 @@ void IMSlider::SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model,
     UseDefaultColors(m_mode == SingleExtruder);
 
     m_is_wipe_tower = m_mode != SingleExtruder;
+
+    m_can_change_color = can_change_color;
 }
 
 void IMSlider::SetExtruderColors( const std::vector<std::string>& extruder_colors)
@@ -1252,7 +1259,10 @@ void IMSlider::render_menu()
 
         //BBS render this menu item only when extruder_num > 1
         if (extruder_num > 1) {
-            if (begin_menu(_u8L("Change Filament").c_str())) {
+            if (!m_can_change_color) {
+                begin_menu(_u8L("Change Filament").c_str(), false);
+            }
+            else if (begin_menu(_u8L("Change Filament").c_str())) {
                 for (int i = 0; i < extruder_num; i++) {
                     std::array<float, 4> rgba     = decode_color_to_float_array(colors[i]);
                     ImU32                icon_clr = IM_COL32(rgba[0] * 255.0f, rgba[1] * 255.0f, rgba[2] * 255.0f, rgba[3] * 255.0f);

src/slic3r/GUI/IMSlider.hpp

@@ -245,7 +245,7 @@ public:
     void SetExtraStyle(long style) { m_extra_style = style; }
     void SetManipulationMode(Mode mode) { m_mode = mode; }
     Mode GetManipulationMode() const { return m_mode; }
-    void SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model, const int only_extruder);
+    void SetModeAndOnlyExtruder(const bool is_one_extruder_printed_model, const int only_extruder, bool can_change_color);
     void SetExtruderColors(const std::vector<std::string> &extruder_colors);
 
     bool IsNewPrint();
@@ -360,6 +360,7 @@ private:
     std::vector<double>      m_layers_times;
     std::vector<double>      m_layers_values;
     std::vector<std::string> m_extruder_colors;
+    bool                     m_can_change_color;
     std::string              m_print_obj_idxs;
     bool                     m_is_need_post_tick_changed_event { false };
     Type                     m_tick_change_event_type;