Finished porting of the status bar to C++.

lib/Slic3r/GUI.pm

@@ -10,7 +10,6 @@ use Slic3r::GUI::MainFrame;
 use Slic3r::GUI::Plater;
 use Slic3r::GUI::Plater::3D;
 use Slic3r::GUI::Plater::3DPreview;
-use Slic3r::GUI::ProgressStatusBar;
 
 use Wx::Locale gettext => 'L';
 

lib/Slic3r/GUI/MainFrame.pm

@@ -114,6 +114,7 @@ sub new {
         # Save the slic3r.ini. Usually the ini file is saved from "on idle" callback,
         # but in rare cases it may not have been called yet.
         wxTheApp->{app_config}->save;
+        $self->{statusbar}->ResetCancelCallback();
         $self->{plater}->{print} = undef if($self->{plater});
         Slic3r::GUI::_3DScene::remove_all_canvases();
         Slic3r::GUI::deregister_on_request_update_callback();

lib/Slic3r/GUI/Plater.pm

@@ -1534,7 +1534,7 @@ sub on_process_completed {
     # At this point of time the thread should be either finished or canceled,
     # so the following call just confirms, that the produced data were consumed.
     $self->{background_slicing_process}->stop;
-    $self->statusbar->SetCancelCallback(undef);
+    $self->statusbar->ResetCancelCallback();
     $self->statusbar->StopBusy;
     $self->statusbar->SetStatusText("");
     

lib/Slic3r/GUI/ProgressStatusBar.pm

@@ -1,18 +0,0 @@
-# Status bar at the bottom of the main screen.
-# Now it just implements cancel cb on perl side, every other functionality is
-# in C++
-
-package Slic3r::GUI::ProgressStatusBar; 
-use strict;
-use warnings;
-
-our $cancel_cb;
-
-sub SetCancelCallback {
-    my $self = shift;
-    my ($cb) = @_;
-    $cancel_cb = $cb;
-    $cb ? $self->ShowCancelButton : $self->HideCancelButton;
-}
-
-1;

xs/src/slic3r/GUI/ProgressStatusBar.cpp

@@ -54,6 +54,7 @@ ProgressStatusBar::ProgressStatusBar(wxWindow *parent, int id):
 
     cancelbutton_->Bind(wxEVT_BUTTON, [this](const wxCommandEvent&) {
         if(cancel_cb_) cancel_cb_();
+        m_perl_cancel_callback.call();
         cancelbutton_->Hide();
     });
 }

xs/src/slic3r/GUI/ProgressStatusBar.hpp

@@ -4,6 +4,8 @@
 #include <memory>
 #include <functional>
 
+#include "../../libslic3r/Utils.hpp"
+
 class wxTimer;
 class wxGauge;
 class wxButton;
@@ -50,6 +52,7 @@ public:
     void show_cancel_button();
     void hide_cancel_button();
 
+    PerlCallback m_perl_cancel_callback;
 private:
     bool busy_ = false;
     CancelFn cancel_cb_;

xs/xsp/ProgressStatusBar.xsp

@@ -39,10 +39,9 @@
     void SetStatusText(const char *txt)
         %code%{ THIS->set_status_text(txt); %};
 
-    void ShowCancelButton()
-        %code%{ THIS->show_cancel_button(); %};
-
-    void HideCancelButton()
-        %code%{ THIS->hide_cancel_button(); %};
+    void SetCancelCallback(SV* callback)
+        %code%{ THIS->m_perl_cancel_callback.register_callback(callback);  THIS->show_cancel_button();%};
+    void ResetCancelCallback()
+        %code%{ THIS->m_perl_cancel_callback.deregister_callback();  THIS->hide_cancel_button(); %};
 
 };