1st installment of preview ported in c++

lib/Slic3r/GUI/Plater.pm

@@ -296,29 +296,52 @@ sub new {
             }
         });
 
-        Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{canvas3D}, sub { Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D}); });
+#======================================================================================================================================
+        Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{canvas3D},
+        sub {
+            Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D});
+            $self->{preview_iface}->set_viewport_from_scene($self->{canvas3D});
+        });
+#        Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{canvas3D}, sub { Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D}); });
+#======================================================================================================================================
     }
 
     Slic3r::GUI::register_on_request_update_callback(sub { $self->schedule_background_process; });
     
     # Initialize 3D toolpaths preview
     if ($Slic3r::GUI::have_OpenGL) {
+#======================================================================================================================================
+        $self->{preview_iface} = Slic3r::GUI::create_preview_iface($self->{preview_notebook}, $self->{config}, $self->{print}, $self->{gcode_preview_data});
+        $self->{preview_page_idx} = $self->{preview_notebook}->GetPageCount-1;        
+#======================================================================================================================================        
         $self->{preview3D} = Slic3r::GUI::Plater::3DPreview->new($self->{preview_notebook}, $self->{print}, $self->{gcode_preview_data}, $self->{config});
         Slic3r::GUI::_3DScene::enable_legend_texture($self->{preview3D}->canvas, 1);
         Slic3r::GUI::_3DScene::enable_dynamic_background($self->{preview3D}->canvas, 1);
         Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{preview3D}->canvas, sub { Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{canvas3D}, $self->{preview3D}->canvas); });
+#======================================================================================================================================
+        $self->{preview_iface}->register_on_viewport_changed_callback(sub { $self->{preview_iface}->set_viewport_into_scene($self->{canvas3D}); });
+#======================================================================================================================================
         $self->{preview_notebook}->AddPage($self->{preview3D}, L('Preview'));
         $self->{preview3D_page_idx} = $self->{preview_notebook}->GetPageCount-1;
     }
     
     EVT_NOTEBOOK_PAGE_CHANGED($self, $self->{preview_notebook}, sub {
         my $preview = $self->{preview_notebook}->GetCurrentPage;
-        if (($preview != $self->{preview3D}) && ($preview != $self->{canvas3D})) {
+#======================================================================================================================================
+        if (($preview != $self->{preview3D}) && ($preview != $self->{canvas3D}) && ($preview != $self->{preview_iface})) {
+#        if (($preview != $self->{preview3D}) && ($preview != $self->{canvas3D})) {
+#======================================================================================================================================
             $preview->OnActivate if $preview->can('OnActivate');        
         } elsif ($preview == $self->{preview3D}) {
             $self->{preview3D}->reload_print;
             # sets the canvas as dirty to force a render at the 1st idle event (wxWidgets IsShownOnScreen() is buggy and cannot be used reliably)
             Slic3r::GUI::_3DScene::set_as_dirty($self->{preview3D}->canvas);
+#======================================================================================================================================
+        } elsif ($preview == $self->{preview_iface}) {
+            $self->{preview_iface}->reload_print;
+            # sets the canvas as dirty to force a render at the 1st idle event (wxWidgets IsShownOnScreen() is buggy and cannot be used reliably)
+            $self->{preview_iface}->set_canvas_as_dirty;
+#======================================================================================================================================
         } elsif ($preview == $self->{canvas3D}) {
             if (Slic3r::GUI::_3DScene::is_reload_delayed($self->{canvas3D})) {
                 my $selections = $self->collect_selections;
@@ -461,7 +484,10 @@ sub new {
     
     $_->SetDropTarget(Slic3r::GUI::Plater::DropTarget->new($self))
         for grep defined($_),
-            $self, $self->{canvas3D}, $self->{preview3D}, $self->{list};
+#======================================================================================================================================
+            $self, $self->{canvas3D}, $self->{preview3D}, $self->{preview_iface}, $self->{list};
+#            $self, $self->{canvas3D}, $self->{preview3D}, $self->{list};
+#======================================================================================================================================
 #            $self, $self->{canvas}, $self->{canvas3D}, $self->{preview3D};
     
     EVT_COMMAND($self, -1, $SLICING_COMPLETED_EVENT, sub {
@@ -491,6 +517,9 @@ sub new {
     if ($self->{preview3D}) {
         Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape);
     }
+#======================================================================================================================================
+    $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
+#======================================================================================================================================
     $self->update;
     
     {
@@ -1006,6 +1035,9 @@ sub remove {
     
     # Prevent toolpaths preview from rendering while we modify the Print object
     $self->{preview3D}->enabled(0) if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->set_enabled(0) if $self->{preview_iface};
+#======================================================================================================================================
     
     # If no object index is supplied, remove the selected one.
     if (! defined $obj_idx) {
@@ -1031,6 +1063,9 @@ sub reset {
     
     # Prevent toolpaths preview from rendering while we modify the Print object
     $self->{preview3D}->enabled(0) if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->set_enabled(0) if $self->{preview_iface};
+#======================================================================================================================================
     
     @{$self->{objects}} = ();
     $self->{model}->clear_objects;
@@ -1392,6 +1427,9 @@ sub async_apply_config {
             # Otherwise they will be just refreshed.
             $self->{gcode_preview_data}->reset;
             $self->{preview3D}->reload_print if $self->{preview3D};
+#======================================================================================================================================
+            $self->{preview_iface}->reload_print if $self->{preview_iface};
+#======================================================================================================================================
             # We also need to reload 3D scene because of the wipe tower preview box
             if ($self->{config}->wipe_tower) {
                 my $selections = $self->collect_selections;
@@ -1427,6 +1465,9 @@ sub stop_background_process {
     my ($self) = @_;
     $self->{background_slicing_process}->stop();
     $self->{preview3D}->reload_print if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->reload_print if $self->{preview_iface};
+#======================================================================================================================================
 }
 
 # Called by the "Slice now" button, which is visible only if the background processing is disabled.
@@ -1533,6 +1574,9 @@ sub export_gcode {
 sub on_update_print_preview {
     my ($self) = @_;
     $self->{preview3D}->reload_print if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->reload_print if $self->{preview_iface};
+#======================================================================================================================================
 
     # in case this was MM print, wipe tower bounding box on 3D tab might need redrawing with exact depth:
     my $selections = $self->collect_selections;
@@ -1614,6 +1658,9 @@ sub on_process_completed {
     
     # refresh preview
     $self->{preview3D}->reload_print if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->reload_print if $self->{preview_iface};
+#======================================================================================================================================
 }
 
 # Fill in the "Sliced info" box with the result of the G-code generator.
@@ -1883,6 +1930,10 @@ sub update {
     Slic3r::GUI::_3DScene::reload_scene($self->{canvas3D}, 0);
     $self->{preview3D}->reset_gcode_preview_data if $self->{preview3D};
     $self->{preview3D}->reload_print if $self->{preview3D};
+#======================================================================================================================================
+    $self->{preview_iface}->reset_gcode_preview_data if $self->{preview_iface};
+    $self->{preview_iface}->reload_print if $self->{preview_iface};
+#======================================================================================================================================
     $self->schedule_background_process;
     $self->Thaw;
 }
@@ -1959,6 +2010,9 @@ sub on_config_change {
 #            $self->{canvas}->update_bed_size;
             Slic3r::GUI::_3DScene::set_bed_shape($self->{canvas3D}, $self->{config}->bed_shape) if $self->{canvas3D};
             Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape) if $self->{preview3D};
+#======================================================================================================================================
+            $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
+#======================================================================================================================================
             $update_scheduled = 1;
         } elsif ($opt_key =~ '^wipe_tower' || $opt_key eq 'single_extruder_multi_material') {
             $update_scheduled = 1;
@@ -1994,12 +2048,18 @@ sub on_config_change {
             $update_scheduled = 1;
             my $extruder_colors = $config->get('extruder_colour');
             $self->{preview3D}->set_number_extruders(scalar(@{$extruder_colors}));
+#======================================================================================================================================
+            $self->{preview_iface}->set_number_extruders(scalar(@{$extruder_colors}));
+#======================================================================================================================================
         } elsif ($opt_key eq 'max_print_height') {
             $update_scheduled = 1;
         } elsif ($opt_key eq 'printer_model') {
             # update to force bed selection (for texturing)
             Slic3r::GUI::_3DScene::set_bed_shape($self->{canvas3D}, $self->{config}->bed_shape) if $self->{canvas3D};
             Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape) if $self->{preview3D};
+#======================================================================================================================================
+            $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
+#======================================================================================================================================
             $update_scheduled = 1;
         }
     }
@@ -2450,12 +2510,24 @@ sub select_view {
     my ($self, $direction) = @_;
     my $idx_page = $self->{preview_notebook}->GetSelection;
     my $page = ($idx_page == &Wx::wxNOT_FOUND) ? L('3D') : $self->{preview_notebook}->GetPageText($idx_page);
-    if ($page eq L('Preview')) {
+#======================================================================================================================================
-        Slic3r::GUI::_3DScene::select_view($self->{preview3D}->canvas, $direction);
+    if (($page eq L('Preview')) || ($page eq L('_Preview_'))) {
-        Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{canvas3D}, $self->{preview3D}->canvas);
+#======================================================================================================================================
+        if ($page eq L('Preview')) {
+            Slic3r::GUI::_3DScene::select_view($self->{preview3D}->canvas, $direction);
+            Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{canvas3D}, $self->{preview3D}->canvas);
+#======================================================================================================================================
+        } else {
+            $self->{preview_iface}->select_view($direction);
+            $self->{preview_iface}->set_viewport_into_scene($self->{canvas3D});
+        }
+#======================================================================================================================================            
     } else {
         Slic3r::GUI::_3DScene::select_view($self->{canvas3D}, $direction);
         Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D});
+#======================================================================================================================================            
+        $self->{preview_iface}->set_viewport_from_scene($self->{canvas3D});
+#======================================================================================================================================            
     }
 }
 

xs/CMakeLists.txt

@@ -222,6 +222,10 @@ add_library(libslic3r_gui STATIC
     ${LIBDIR}/slic3r/GUI/GUI.hpp
     ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.cpp
     ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.hpp
+    ${LIBDIR}/slic3r/GUI/GUI_Preview.cpp
+    ${LIBDIR}/slic3r/GUI/GUI_Preview.hpp
+    ${LIBDIR}/slic3r/GUI/GUI_PreviewIface.cpp
+    ${LIBDIR}/slic3r/GUI/GUI_PreviewIface.hpp
     ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.cpp
     ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.hpp
     ${LIBDIR}/slic3r/GUI/Tab.cpp
@@ -463,6 +467,7 @@ set(XS_XSP_FILES
     ${XSP_DIR}/GUI_3DScene.xsp
     ${XSP_DIR}/GUI_Preset.xsp
     ${XSP_DIR}/GUI_Tab.xsp
+    ${XSP_DIR}/GUI_Preview.xsp
     ${XSP_DIR}/Layer.xsp
     ${XSP_DIR}/Line.xsp
     ${XSP_DIR}/Model.xsp

xs/src/perlglue.cpp

@@ -63,6 +63,7 @@ REGISTER_CLASS(Preset, "GUI::Preset");
 REGISTER_CLASS(PresetCollection, "GUI::PresetCollection");
 REGISTER_CLASS(PresetBundle, "GUI::PresetBundle");
 REGISTER_CLASS(TabIface, "GUI::Tab");
+REGISTER_CLASS(PreviewIface, "GUI::Preview");
 REGISTER_CLASS(ProgressStatusBar, "GUI::ProgressStatusBar");
 REGISTER_CLASS(PresetUpdater, "PresetUpdater");
 REGISTER_CLASS(AppController, "AppController");

xs/src/slic3r/GUI/GUI.cpp

@@ -46,6 +46,10 @@
 
 #include "Tab.hpp"
 #include "TabIface.hpp"
+//##############################################################################################################################################################
+#include "GUI_Preview.hpp"
+#include "GUI_PreviewIface.hpp"
+//##############################################################################################################################################################
 #include "AboutDialog.hpp"
 #include "AppConfig.hpp"
 #include "ConfigSnapshotDialog.hpp"
@@ -148,6 +152,10 @@ wxStaticBitmap	*g_manifold_warning_icon = nullptr;
 bool		g_show_print_info = false;
 bool		g_show_manifold_warning_icon = false;
 
+//##############################################################################################################################################################
+PreviewIface* g_preview = nullptr; // <<< FIXME ENRICO -> add code to delete the pointer when the application closes
+//##############################################################################################################################################################
+
 static void init_label_colours()
 {
 	auto luma = get_colour_approx_luma(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
@@ -665,6 +673,19 @@ TabIface* get_preset_tab_iface(char *name)
 	return new TabIface(nullptr);
 }
 
+//##############################################################################################################################################################
+PreviewIface* create_preview_iface(wxNotebook* parent, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data)
+{
+    if (g_preview == nullptr)
+    {
+        Preview* panel = new Preview(parent, config, print, gcode_preview_data);
+        g_preview = new PreviewIface(panel);
+    }
+
+    return g_preview;
+}
+//##############################################################################################################################################################
+
 // opt_index = 0, by the reason of zero-index in ConfigOptionVector by default (in case only one element)
 void change_opt_value(DynamicPrintConfig& config, const t_config_option_key& opt_key, const boost::any& value, int opt_index /*= 0*/)
 {

xs/src/slic3r/GUI/GUI.hpp

@@ -39,6 +39,11 @@ class AppConfig;
 class PresetUpdater;
 class DynamicPrintConfig;
 class TabIface;
+//##############################################################################################################################################################
+class PreviewIface;
+class Print;
+class GCodePreviewData;
+//##############################################################################################################################################################
 
 #define _(s)    Slic3r::GUI::I18N::translate((s))
 
@@ -165,6 +170,10 @@ extern void open_preferences_dialog(int event_preferences);
 void create_preset_tabs(int event_value_change, int event_presets_changed);
 TabIface* get_preset_tab_iface(char *name);
 
+//##############################################################################################################################################################
+PreviewIface* create_preview_iface(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data);
+//##############################################################################################################################################################
+
 // add it at the end of the tab panel.
 void add_created_tab(Tab* panel, int event_value_change, int event_presets_changed);
 // Change option value in config

xs/src/slic3r/GUI/GUI_Preview.cpp

@@ -0,0 +1,376 @@
+#include "../../libslic3r/libslic3r.h"
+#include "GUI_Preview.hpp"
+#include "GUI.hpp"
+#include "AppConfig.hpp"
+#include "3DScene.hpp"
+#include "../../libslic3r/GCode/PreviewData.hpp"
+
+#include <wx/notebook.h>
+#include <wx/glcanvas.h>
+#include <wx/sizer.h>
+#include <wx/stattext.h>
+#include <wx/choice.h>
+#include <wx/combo.h>
+#include <wx/checkbox.h>
+
+namespace Slic3r {
+namespace GUI {
+
+Preview::Preview(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data)
+    : m_canvas(nullptr)
+    , m_double_slider_sizer(nullptr)
+    , m_label_view_type(nullptr)
+    , m_choice_view_type(nullptr)
+    , m_label_show_features(nullptr)
+    , m_combochecklist_features(nullptr)
+    , m_checkbox_travel(nullptr)
+    , m_checkbox_retractions(nullptr)
+    , m_checkbox_unretractions(nullptr)
+    , m_checkbox_shells(nullptr)
+    , m_config(config)
+    , m_print(print)
+    , m_gcode_preview_data(gcode_preview_data)
+    , m_number_extruders(1)
+    , m_preferred_color_mode("feature")
+    , m_loaded(false)
+    , m_enabled(false)
+    , m_force_sliders_full_range(false)
+{
+    if (init(notebook, config, print, gcode_preview_data))
+    {
+        notebook->AddPage(this, _(L("_Preview_")));
+        show_hide_ui_elements("none");
+        reload_print();
+    }
+}
+
+bool Preview::init(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data)
+{
+    if ((notebook == nullptr) || (config == nullptr) || (print == nullptr) || (gcode_preview_data == nullptr))
+        return false;
+
+    // creates this panel add append it to the given notebook as a new page
+    if (!Create(notebook, wxID_ANY, wxDefaultPosition, wxDefaultSize))
+        return false;
+
+    int attribList[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 24, WX_GL_SAMPLE_BUFFERS, 1, WX_GL_SAMPLES, 4, 0 };
+
+    int wxVersion = wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + wxRELEASE_NUMBER;
+    const AppConfig* app_config = GUI::get_app_config();
+    bool enable_multisample = (app_config != nullptr) && (app_config->get("use_legacy_opengl") != "1") && (wxVersion >= 30003);
+
+    // if multisample is not enabled or supported by the graphic card, remove it from the attributes list
+    bool can_multisample = enable_multisample && wxGLCanvas::IsDisplaySupported(attribList); // <<< FIXME ENRICO IsDisplaySupported() seems not to work
+    if (!can_multisample)
+        attribList[4] = 0;
+
+    m_canvas = new wxGLCanvas(this, wxID_ANY, attribList);
+    if (m_canvas == nullptr)
+        return false;
+
+    _3DScene::add_canvas(m_canvas);
+    _3DScene::allow_multisample(m_canvas, can_multisample);
+    _3DScene::enable_shader(m_canvas, true);
+    _3DScene::set_config(m_canvas, m_config);
+    _3DScene::set_print(m_canvas, m_print);
+    _3DScene::enable_legend_texture(m_canvas, true);
+    _3DScene::enable_dynamic_background(m_canvas, true);
+
+    m_double_slider_sizer = new wxBoxSizer(wxHORIZONTAL);
+    create_double_slider(this, m_double_slider_sizer, m_canvas);
+
+    m_label_view_type = new wxStaticText(this, wxID_ANY, _(L("View")));
+
+    m_choice_view_type = new wxChoice(this, wxID_ANY);
+    m_choice_view_type->Append(_(L("Feature type")));
+    m_choice_view_type->Append(_(L("Height")));
+    m_choice_view_type->Append(_(L("Width")));
+    m_choice_view_type->Append(_(L("Speed")));
+    m_choice_view_type->Append(_(L("Volumetric flow rate")));
+    m_choice_view_type->Append(_(L("Tool")));
+    m_choice_view_type->SetSelection(0);
+
+    m_label_show_features = new wxStaticText(this, wxID_ANY, _(L("Show")));
+
+    m_combochecklist_features = new wxComboCtrl();
+    m_combochecklist_features->Create(this, wxID_ANY, _(L("Feature types")), wxDefaultPosition, wxSize(200, -1), wxCB_READONLY);
+    std::string feature_text = _(L("Feature types"));
+    std::string feature_items = _(L("Perimeter")) + "|" +
+        _(L("External perimeter")) + "|" +
+        _(L("Overhang perimeter")) + "|" +
+        _(L("Internal infill")) + "|" +
+        _(L("Solid infill")) + "|" +
+        _(L("Top solid infill")) + "|" +
+        _(L("Bridge infill")) + "|" +
+        _(L("Gap fill")) + "|" +
+        _(L("Skirt")) + "|" +
+        _(L("Support material")) + "|" +
+        _(L("Support material interface")) + "|" +
+        _(L("Wipe tower")) + "|" +
+        _(L("Custom"));
+    Slic3r::GUI::create_combochecklist(m_combochecklist_features, feature_text, feature_items, true);
+
+    m_checkbox_travel = new wxCheckBox(this, wxID_ANY, _(L("Travel")));
+    m_checkbox_retractions = new wxCheckBox(this, wxID_ANY, _(L("Retractions")));
+    m_checkbox_unretractions = new wxCheckBox(this, wxID_ANY, _(L("Unretractions")));
+    m_checkbox_shells = new wxCheckBox(this, wxID_ANY, _(L("Shells")));
+
+    wxBoxSizer* top_sizer = new wxBoxSizer(wxHORIZONTAL);
+    top_sizer->Add(m_canvas, 1, wxALL | wxEXPAND, 0);
+    top_sizer->Add(m_double_slider_sizer, 0, wxEXPAND, 0);
+
+    wxBoxSizer* bottom_sizer = new wxBoxSizer(wxHORIZONTAL);
+    bottom_sizer->Add(m_label_view_type, 0, wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->Add(m_choice_view_type, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->AddSpacer(10);
+    bottom_sizer->Add(m_label_show_features, 0, wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->Add(m_combochecklist_features, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->AddSpacer(20);
+    bottom_sizer->Add(m_checkbox_travel, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->AddSpacer(10);
+    bottom_sizer->Add(m_checkbox_retractions, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->AddSpacer(10);
+    bottom_sizer->Add(m_checkbox_unretractions, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+    bottom_sizer->AddSpacer(10);
+    bottom_sizer->Add(m_checkbox_shells, 0, wxEXPAND | wxALL | wxALIGN_CENTER_VERTICAL, 5);
+
+    wxBoxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(top_sizer, 1, wxALL | wxEXPAND, 0);
+    main_sizer->Add(bottom_sizer, 0, wxALL | wxEXPAND, 0);
+
+    SetSizer(main_sizer);
+    SetMinSize(GetSize());
+    GetSizer()->SetSizeHints(this);
+
+    bind_event_handlers();
+    
+    // sets colors for gcode preview extrusion roles
+    std::vector<std::string>  extrusion_roles_colors = {
+        "FFFF66", // Perimeter 
+        "FFA500", // External perimeter
+        "0000FF", // Overhang perimeter
+        "B1302A", // Internal infill
+        "D732D7", // Solid infill
+        "FF1A1A", // Top solid infill
+        "9999FF", // Bridge infill
+        "FFFFFF", // Gap fill
+        "845321", // Skirt
+        "00FF00", // Support material
+        "008000", // Support material interface
+        "B3E3AB", // Wipe tower
+        "28CC94" // Custom
+    };
+    m_gcode_preview_data->set_extrusion_paths_colors(extrusion_roles_colors);
+
+    return true;
+}
+
+Preview::~Preview()
+{
+    unbind_event_handlers();
+
+    if (m_canvas != nullptr)
+    {
+        _3DScene::remove_canvas(m_canvas);
+        delete m_canvas;
+    }
+}
+
+void Preview::register_on_viewport_changed_callback(void* callback)
+{
+    if ((m_canvas != nullptr) && (callback != nullptr))
+        _3DScene::register_on_viewport_changed_callback(m_canvas, callback);
+}
+
+void Preview::set_number_extruders(unsigned int number_extruders)
+{
+    if (m_number_extruders != number_extruders)
+    {
+        m_number_extruders = number_extruders;
+        int type = 0; // color by a feature type
+        if (number_extruders > 1)
+        {
+            int tool_idx = m_choice_view_type->FindString(_(L("Tool")));
+            int type = (number_extruders > 1) ? tool_idx /* color by a tool number */  : 0; // color by a feature type
+            m_choice_view_type->SetSelection(type);
+            if ((0 <= type) && (type < (int)GCodePreviewData::Extrusion::Num_View_Types))
+                m_gcode_preview_data->extrusion.view_type = (GCodePreviewData::Extrusion::EViewType)type;
+
+            m_preferred_color_mode = (type == tool_idx) ? "tool_or_feature" : "feature";
+        }
+    }
+}
+
+void Preview::reset_gcode_preview_data()
+{
+    m_gcode_preview_data->reset();
+    _3DScene::reset_legend_texture();
+}
+
+void Preview::set_canvas_as_dirty()
+{
+    if (m_canvas != nullptr)
+        _3DScene::set_as_dirty(m_canvas);
+}
+
+void Preview::set_enabled(bool enabled)
+{
+    m_enabled = enabled;
+}
+
+void Preview::set_bed_shape(const Pointfs& shape)
+{
+    if (m_canvas != nullptr)
+        _3DScene::set_bed_shape(m_canvas, shape);
+}
+
+void Preview::select_view(const std::string& direction)
+{
+    if (m_canvas != nullptr)
+        _3DScene::select_view(m_canvas, direction);
+}
+
+void Preview::set_viewport_from_scene(wxGLCanvas* canvas)
+{
+    if ((m_canvas != nullptr) && (canvas != nullptr))
+        _3DScene::set_viewport_from_scene(m_canvas, canvas);
+}
+
+void Preview::set_viewport_into_scene(wxGLCanvas* canvas)
+{
+    if ((m_canvas != nullptr) && (canvas != nullptr))
+        _3DScene::set_viewport_from_scene(canvas, m_canvas);
+}
+
+void Preview::set_drop_target(wxDropTarget* target)
+{
+    if (target != nullptr)
+        SetDropTarget(target);
+}
+
+void Preview::load_print()
+{
+}
+
+void Preview::reload_print(bool force)
+{
+    _3DScene::reset_volumes(m_canvas);
+    m_loaded = false;
+
+    if (!IsShown() && !force)
+        return;
+
+    load_print();
+}
+
+void Preview::refresh_print()
+{
+    m_loaded = false;
+
+    if (!IsShown())
+        return;
+
+    load_print();
+}
+
+void Preview::bind_event_handlers()
+{
+    this->Bind(wxEVT_SIZE, &Preview::on_size, this);
+    m_choice_view_type->Bind(wxEVT_CHOICE, &Preview::on_choice_view_type, this);
+    m_combochecklist_features->Bind(wxEVT_CHECKLISTBOX, &Preview::on_combochecklist_features, this);
+    m_checkbox_travel->Bind(wxEVT_CHECKBOX, &Preview::on_checkbox_travel, this);
+    m_checkbox_retractions->Bind(wxEVT_CHECKBOX, &Preview::on_checkbox_retractions, this);
+    m_checkbox_unretractions->Bind(wxEVT_CHECKBOX, &Preview::on_checkbox_unretractions, this);
+    m_checkbox_shells->Bind(wxEVT_CHECKBOX, &Preview::on_checkbox_shells, this);
+}
+
+void Preview::unbind_event_handlers()
+{
+    this->Unbind(wxEVT_SIZE, &Preview::on_size, this);
+    m_choice_view_type->Unbind(wxEVT_CHOICE, &Preview::on_choice_view_type, this);
+    m_combochecklist_features->Unbind(wxEVT_CHECKLISTBOX, &Preview::on_combochecklist_features, this);
+    m_checkbox_travel->Unbind(wxEVT_CHECKBOX, &Preview::on_checkbox_travel, this);
+    m_checkbox_retractions->Unbind(wxEVT_CHECKBOX, &Preview::on_checkbox_retractions, this);
+    m_checkbox_unretractions->Unbind(wxEVT_CHECKBOX, &Preview::on_checkbox_unretractions, this);
+    m_checkbox_shells->Unbind(wxEVT_CHECKBOX, &Preview::on_checkbox_shells, this);
+}
+
+void Preview::show_hide_ui_elements(const std::string& what)
+{
+    bool enable = (what == "full");
+    m_label_show_features->Enable(enable);
+    m_combochecklist_features->Enable(enable);
+    m_checkbox_travel->Enable(enable); 
+    m_checkbox_retractions->Enable(enable);
+    m_checkbox_unretractions->Enable(enable);
+    m_checkbox_shells->Enable(enable);
+
+    enable = (what != "none");
+    m_label_view_type->Enable(enable);
+    m_choice_view_type->Enable(enable);
+}
+
+void Preview::reset_sliders()
+{
+    m_enabled = false;
+    reset_double_slider();
+    m_double_slider_sizer->Hide((size_t)0);
+}
+
+void Preview::update_sliders()
+{
+    m_enabled = true;
+    update_double_slider(m_force_sliders_full_range);
+    m_double_slider_sizer->Show((size_t)0);
+    Layout();
+}
+
+void Preview::on_size(wxSizeEvent& evt)
+{
+    evt.Skip();
+    Refresh();
+}
+
+void Preview::on_choice_view_type(wxCommandEvent& evt)
+{
+    m_preferred_color_mode = (m_choice_view_type->GetStringSelection() == L("Tool")) ? "tool" : "feature";
+    int selection = m_choice_view_type->GetCurrentSelection();
+    if ((0 <= selection) && (selection < (int)GCodePreviewData::Extrusion::Num_View_Types))
+        m_gcode_preview_data->extrusion.view_type = (GCodePreviewData::Extrusion::EViewType)selection;
+
+    reload_print();
+}
+
+void Preview::on_combochecklist_features(wxCommandEvent& evt)
+{
+    int flags = Slic3r::GUI::combochecklist_get_flags(m_combochecklist_features);
+    m_gcode_preview_data->extrusion.role_flags = (unsigned int)flags;
+    refresh_print();
+}
+
+void Preview::on_checkbox_travel(wxCommandEvent& evt)
+{
+    m_gcode_preview_data->travel.is_visible = m_checkbox_travel->IsChecked();
+    refresh_print();
+}
+
+void Preview::on_checkbox_retractions(wxCommandEvent& evt)
+{
+    m_gcode_preview_data->retraction.is_visible = m_checkbox_retractions->IsChecked();
+    refresh_print();
+}
+
+void Preview::on_checkbox_unretractions(wxCommandEvent& evt)
+{
+    m_gcode_preview_data->unretraction.is_visible = m_checkbox_unretractions->IsChecked();
+    refresh_print();
+}
+
+void Preview::on_checkbox_shells(wxCommandEvent& evt)
+{
+    m_gcode_preview_data->shell.is_visible = m_checkbox_shells->IsChecked();
+    refresh_print();
+}
+
+} // namespace GUI
+} // namespace Slic3r

xs/src/slic3r/GUI/GUI_Preview.hpp

@@ -0,0 +1,91 @@
+#ifndef slic3r_GUI_Preview_hpp_
+#define slic3r_GUI_Preview_hpp_
+
+#include <wx/panel.h>
+#include "../../libslic3r/Point.hpp"
+
+#include <string>
+
+class wxNotebook;
+class wxGLCanvas;
+class wxBoxSizer;
+class wxStaticText;
+class wxChoice;
+class wxComboCtrl;
+class wxCheckBox;
+
+namespace Slic3r {
+
+class DynamicPrintConfig;
+class Print;
+class GCodePreviewData;
+
+namespace GUI {
+
+class Preview : public wxPanel
+{
+    wxGLCanvas* m_canvas;
+    wxBoxSizer* m_double_slider_sizer;
+    wxStaticText* m_label_view_type;
+    wxChoice* m_choice_view_type;
+    wxStaticText* m_label_show_features;
+    wxComboCtrl* m_combochecklist_features;
+    wxCheckBox* m_checkbox_travel;
+    wxCheckBox* m_checkbox_retractions;
+    wxCheckBox* m_checkbox_unretractions;
+    wxCheckBox* m_checkbox_shells;
+
+    DynamicPrintConfig* m_config;
+    Print* m_print;
+    GCodePreviewData* m_gcode_preview_data;
+
+    unsigned int m_number_extruders;
+    std::string m_preferred_color_mode;
+
+    bool m_loaded;
+    bool m_enabled;
+    bool m_force_sliders_full_range;
+
+public:
+    Preview(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data);
+    virtual ~Preview();
+
+    void register_on_viewport_changed_callback(void* callback);
+    void set_number_extruders(unsigned int number_extruders);
+    void reset_gcode_preview_data();
+    void set_canvas_as_dirty();
+    void set_enabled(bool enabled);
+    void set_bed_shape(const Pointfs& shape);
+    void select_view(const std::string& direction);
+    void set_viewport_from_scene(wxGLCanvas* canvas);
+    void set_viewport_into_scene(wxGLCanvas* canvas);
+    void set_drop_target(wxDropTarget* target);
+
+    void load_print();
+    void reload_print(bool force = false);
+    void refresh_print();
+    
+private:
+    bool init(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data);
+
+    void bind_event_handlers();
+    void unbind_event_handlers();
+
+    void show_hide_ui_elements(const std::string& what);
+
+    void reset_sliders();
+    void update_sliders();
+
+    void on_size(wxSizeEvent& evt);
+    void on_choice_view_type(wxCommandEvent& evt);
+    void on_combochecklist_features(wxCommandEvent& evt);
+    void on_checkbox_travel(wxCommandEvent& evt);
+    void on_checkbox_retractions(wxCommandEvent& evt);
+    void on_checkbox_unretractions(wxCommandEvent& evt);
+    void on_checkbox_shells(wxCommandEvent& evt);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GUI_Preview_hpp_

xs/src/slic3r/GUI/GUI_PreviewIface.cpp

@@ -0,0 +1,62 @@
+#include "../../libslic3r/libslic3r.h"
+#include "GUI_PreviewIface.hpp"
+#include "GUI_Preview.hpp"
+
+namespace Slic3r {
+
+void PreviewIface::register_on_viewport_changed_callback(void* callback)
+{
+    m_preview->register_on_viewport_changed_callback(callback);
+}
+
+void PreviewIface::set_number_extruders(unsigned int number_extruders)
+{
+    m_preview->set_number_extruders(number_extruders);
+}
+
+void PreviewIface::reset_gcode_preview_data()
+{
+    m_preview->reset_gcode_preview_data();
+}
+
+void PreviewIface::reload_print(bool force)
+{
+    m_preview->reload_print(force);
+}
+
+void PreviewIface::set_canvas_as_dirty()
+{
+    m_preview->set_canvas_as_dirty();
+}
+
+void PreviewIface::set_enabled(bool enabled)
+{
+    m_preview->set_enabled(enabled);
+}
+
+void PreviewIface::set_bed_shape(const Pointfs& shape)
+{
+    m_preview->set_bed_shape(shape);
+}
+
+void PreviewIface::select_view(const std::string& direction)
+{
+    m_preview->select_view(direction);
+}
+
+void PreviewIface::set_viewport_from_scene(wxGLCanvas* canvas)
+{
+    m_preview->set_viewport_from_scene(canvas);
+}
+
+void PreviewIface::set_viewport_into_scene(wxGLCanvas* canvas)
+{
+    m_preview->set_viewport_into_scene(canvas);
+}
+
+void PreviewIface::set_drop_target(wxDropTarget* target)
+{
+    m_preview->set_drop_target(target);
+}
+
+} // namespace Slic3r

xs/src/slic3r/GUI/GUI_PreviewIface.hpp

@@ -0,0 +1,37 @@
+#ifndef slic3r_GUI_PreviewIface_hpp_
+#define slic3r_GUI_PreviewIface_hpp_
+
+#include "../../libslic3r/Point.hpp"
+
+class wxGLCanvas;
+class wxDropTarget;
+
+namespace Slic3r {
+
+namespace GUI {
+class Preview;
+} // namespace GUI
+
+class PreviewIface
+{
+    GUI::Preview* m_preview;
+
+public:
+    explicit PreviewIface(GUI::Preview* preview) : m_preview(preview) {}
+
+    void register_on_viewport_changed_callback(void* callback);
+    void set_number_extruders(unsigned int number_extruders);
+    void reset_gcode_preview_data();
+    void reload_print(bool force = false);
+    void set_canvas_as_dirty();
+    void set_enabled(bool enabled);
+    void set_bed_shape(const Pointfs& shape);
+    void select_view(const std::string& direction);
+    void set_viewport_from_scene(wxGLCanvas* canvas);
+    void set_viewport_into_scene(wxGLCanvas* canvas);
+    void set_drop_target(wxDropTarget* target);
+};
+
+} // namespace Slic3r
+
+#endif // slic3r_GUI_PreviewIface_hpp_

xs/xsp/GUI.xsp

@@ -59,6 +59,9 @@ void show_error_id(int id, std::string msg)
 TabIface* get_preset_tab(char *name)
     %code%{ RETVAL=Slic3r::GUI::get_preset_tab_iface(name); %};
 
+PreviewIface* create_preview_iface(SV *ui, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data)
+    %code%{ RETVAL=Slic3r::GUI::create_preview_iface((wxNotebook*)wxPli_sv_2_object(aTHX_ ui, "Wx::Notebook"), config, print, gcode_preview_data); %};
+
 bool load_language()
     %code%{ RETVAL=Slic3r::GUI::load_language(); %};
 

xs/xsp/GUI_Preview.xsp

@@ -0,0 +1,28 @@
+%module{Slic3r::XS};
+
+%{
+#include <xsinit.h>
+#include "slic3r/GUI/GUI_PreviewIface.hpp"
+%}
+
+%name{Slic3r::GUI::Preview} class PreviewIface {
+
+    void register_on_viewport_changed_callback(SV* callback)
+        %code%{ THIS->register_on_viewport_changed_callback((void*)callback); %};
+
+    void set_number_extruders(unsigned int number_extruders);
+    void reset_gcode_preview_data();
+    void reload_print(bool force = false);
+    void set_canvas_as_dirty();
+    void set_enabled(bool enabled);
+    void set_bed_shape(Pointfs shape);
+    void select_view(std::string direction);
+    void set_viewport_from_scene(SV *ui)
+        %code%{ THIS->set_viewport_from_scene((wxGLCanvas*)wxPli_sv_2_object(aTHX_ ui, "Wx::GLCanvas")); %};
+
+    void set_viewport_into_scene(SV *ui)
+        %code%{ THIS->set_viewport_into_scene((wxGLCanvas*)wxPli_sv_2_object(aTHX_ ui, "Wx::GLCanvas")); %};
+    
+    void SetDropTarget(SV *ui)
+        %code%{ THIS->set_drop_target((wxDropTarget*)wxPli_sv_2_object(aTHX_ ui, "Wx::DropTarget")); %};
+};

xs/xsp/my.map

@@ -235,10 +235,12 @@ PresetCollection*	      	O_OBJECT_SLIC3R
 Ref<PresetCollection>      	O_OBJECT_SLIC3R_T
 PresetBundle*	    		O_OBJECT_SLIC3R
 Ref<PresetBundle>    		O_OBJECT_SLIC3R_T
-TabIface*                       O_OBJECT_SLIC3R
+TabIface*                   O_OBJECT_SLIC3R
-Ref<TabIface> 			O_OBJECT_SLIC3R_T
+Ref<TabIface> 			    O_OBJECT_SLIC3R_T
-ProgressStatusBar*              O_OBJECT_SLIC3R
+PreviewIface*               O_OBJECT_SLIC3R
-Ref<ProgressStatusBar>          O_OBJECT_SLIC3R_T
+Ref<PreviewIface> 			O_OBJECT_SLIC3R_T
+ProgressStatusBar*          O_OBJECT_SLIC3R
+Ref<ProgressStatusBar>      O_OBJECT_SLIC3R_T
 
 PresetUpdater*              O_OBJECT_SLIC3R
 Ref<PresetUpdater>          O_OBJECT_SLIC3R_T

xs/xsp/typemap.xspt

@@ -215,6 +215,7 @@
 %typemap{PresetHints*};
 %typemap{Ref<PresetHints>}{simple};
 %typemap{TabIface*};
+%typemap{PreviewIface*};
 %typemap{ProgressStatusBar*};
 
 %typemap{PrintRegionPtrs*};