"Undo"-buttons work

xs/src/libslic3r/PrintConfig.cpp

@@ -418,7 +418,7 @@ PrintConfigDef::PrintConfigDef()
     def->tooltip = L("This is only used in the Slic3r interface as a visual help.");
     def->cli = "filament-color=s@";
     def->gui_type = "color";
-    def->default_value = new ConfigOptionStrings { "#29b2b2" };
+    def->default_value = new ConfigOptionStrings { "#29B2B2" };
 
     def = this->add("filament_notes", coStrings);
     def->label = L("Filament notes");

xs/src/slic3r/GUI/Tab.cpp

@@ -62,9 +62,9 @@ void Tab::create_preset_tab(PresetBundle *preset_bundle)
 		m_undo_to_sys_btn->SetBackgroundColour(color);
 	}
 	m_undo_btn->SetBitmap(wxBitmap(from_u8(var("bullet_white.png")), wxBITMAP_TYPE_PNG));
-	m_undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){  }));
+	m_undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_back_to_initial_value(); }));
 	m_undo_to_sys_btn->SetBitmap(wxBitmap(from_u8(var("bullet_white.png")), wxBITMAP_TYPE_PNG));
-	m_undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){  }));
+	m_undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_back_to_sys_value(); }));
 
 	m_hsizer = new wxBoxSizer(wxHORIZONTAL);
 	sizer->Add(m_hsizer, 0, wxBOTTOM, 3);
@@ -442,6 +442,51 @@ void Tab::update_undo_buttons()
 	m_undo_to_sys_btn->SetBitmap(wxBitmap(from_u8(var(undo_to_sys_icon)), wxBITMAP_TYPE_PNG));
 }
 
+void Tab::on_back_to_initial_value()
+{
+	if (!m_is_modified_values) return;
+
+	auto selection = m_treectrl->GetItemText(m_treectrl->GetSelection());
+	for (auto page : m_pages)
+		if (page->title() == selection)	{
+			for (auto group : page->m_optgroups){
+				if (group->title == _("Capabilities")){
+					if (find(m_dirty_options.begin(), m_dirty_options.end(), "extruders_count") != m_dirty_options.end())
+						group->back_to_initial_value("extruders_count");
+				}
+				for (t_opt_map::iterator it = group->m_opt_map.begin(); it != group->m_opt_map.end(); ++it) {
+					const std::string& opt_key = it->first;
+					if (find(m_dirty_options.begin(), m_dirty_options.end(), opt_key) != m_dirty_options.end())
+						group->back_to_initial_value(opt_key);
+				}
+			}
+			break;
+		}
+
+}
+
+void Tab::on_back_to_sys_value()
+{
+	if (!m_is_nonsys_values) return;
+
+	auto selection = m_treectrl->GetItemText(m_treectrl->GetSelection());
+	for (auto page : m_pages)
+		if (page->title() == selection)	{
+			for (auto group : page->m_optgroups) {
+				if (group->title == _("Capabilities")){
+					if (find(m_sys_options.begin(), m_sys_options.end(), "extruders_count") == m_sys_options.end())
+						group->back_to_sys_value("extruders_count");
+				}
+				for (t_opt_map::iterator it = group->m_opt_map.begin(); it != group->m_opt_map.end(); ++it) {
+					const std::string& opt_key = it->first;
+					if (find(m_sys_options.begin(), m_sys_options.end(), opt_key) == m_sys_options.end())
+						group->back_to_sys_value(opt_key);
+				}
+			}
+			break;
+		}
+}
+
 // Update the combo box label of the selected preset based on its "dirty" state,
 // comparing the selected preset config with $self->{config}.
 void Tab::update_dirty(){

xs/src/slic3r/GUI/Tab.hpp

@@ -163,6 +163,9 @@ public:
 	void		update_changed_tree_ui();
 	void		update_undo_buttons();
 
+	void		on_back_to_initial_value();
+	void		on_back_to_sys_value();
+
 	PageShp		add_options_page(wxString title, std::string icon, bool is_extruder_pages = false);
 
 	virtual void	OnActivate(){}