Performance fix of rendering of the parameter tabs on Windows:

Disabled Windows Vista themes for the wxNotebook.

src/slic3r/GUI/Field.cpp

@@ -259,7 +259,12 @@ void TextCtrl::BUILD() {
 
     const long style = m_opt.multiline ? wxTE_MULTILINE : wxTE_PROCESS_ENTER/*0*/;
 	auto temp = new wxTextCtrl(m_parent, wxID_ANY, text_value, wxDefaultPosition, size, style);
-	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
+	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
+
+	if (! m_opt.multiline)
+		// Only disable background refresh for single line input fields, as they are completely painted over by the edit control.
+		// This does not apply to the multi-line edit field, where the last line and a narrow frame around the text is not cleared.
+		temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
 #ifdef __WXOSX__
     temp->OSXDisableAllSmartSubstitutions();
 #endif // __WXOSX__
@@ -375,6 +380,7 @@ void CheckBox::BUILD() {
     					false;
 
 	auto temp = new wxCheckBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size); 
+	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
 	temp->SetValue(check_value);
 	if (m_opt.readonly) temp->Disable();
@@ -433,6 +439,7 @@ void SpinCtrl::BUILD() {
 
 	auto temp = new wxSpinCtrl(m_parent, wxID_ANY, text_value, wxDefaultPosition, size,
 		0|wxTE_PROCESS_ENTER, min_val, max_val, default_value);
+	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
 
 #ifndef __WXOSX__
@@ -507,6 +514,7 @@ void Choice::BUILD() {
 		temp = new wxComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size);
 	else
 		temp = new wxComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size, 0, NULL, wxCB_READONLY);
+	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
 
 	// recast as a wxWindow to fit the calling convention
@@ -815,12 +823,16 @@ void PointCtrl::BUILD()
 
 	x_textctrl = new wxTextCtrl(m_parent, wxID_ANY, X, wxDefaultPosition, field_size, wxTE_PROCESS_ENTER);
 	y_textctrl = new wxTextCtrl(m_parent, wxID_ANY, Y, wxDefaultPosition, field_size, wxTE_PROCESS_ENTER);
+	x_textctrl->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	x_textctrl->SetBackgroundStyle(wxBG_STYLE_PAINT);
+	y_textctrl->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	y_textctrl->SetBackgroundStyle(wxBG_STYLE_PAINT);
 
 	auto static_text_x = new wxStaticText(m_parent, wxID_ANY, "x : ");
 	auto static_text_y = new wxStaticText(m_parent, wxID_ANY, "   y : ");
+	static_text_x->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	static_text_x->SetBackgroundStyle(wxBG_STYLE_PAINT);
+	static_text_y->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	static_text_y->SetBackgroundStyle(wxBG_STYLE_PAINT);
 
 	temp->Add(static_text_x, 0, wxALIGN_CENTER_VERTICAL, 0);
@@ -894,6 +906,7 @@ void StaticText::BUILD()
 
     const wxString legend(static_cast<const ConfigOptionString*>(m_opt.default_value)->value);
     auto temp = new wxStaticText(m_parent, wxID_ANY, legend, wxDefaultPosition, size, wxST_ELLIPSIZE_MIDDLE);
+	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
     temp->SetFont(wxGetApp().bold_font());
 
@@ -918,11 +931,13 @@ void SliderCtrl::BUILD()
 	m_slider = new wxSlider(m_parent, wxID_ANY, def_val * m_scale,
 							min * m_scale, max * m_scale,
 							wxDefaultPosition, size);
+	m_slider->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	m_slider->SetBackgroundStyle(wxBG_STYLE_PAINT);
  	wxSize field_size(40, -1);
 
 	m_textctrl = new wxTextCtrl(m_parent, wxID_ANY, wxString::Format("%d", m_slider->GetValue()/m_scale), 
 								wxDefaultPosition, field_size);
+	m_textctrl->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	m_textctrl->SetBackgroundStyle(wxBG_STYLE_PAINT);
 
 	temp->Add(m_slider, 1, wxEXPAND | wxALIGN_CENTER_VERTICAL, 0);

src/slic3r/GUI/GUI_App.cpp

@@ -94,7 +94,11 @@ bool GUI_App::OnInit()
     SetAppName("Slic3rPE-beta");
     SetAppDisplayName("Slic3r Prusa Edition");
 
+// Enable this to get the default Win32 COMCTRL32 behavior of static boxes.
 //    wxSystemOptions::SetOption("msw.staticbox.optimized-paint", 0);
+// Enable this to disable Windows Vista themes for all wxNotebooks. The themes seem to lead to terrible
+// performance when working on high resolution multi-display setups.
+//    wxSystemOptions::SetOption("msw.notebook.themed-background", 0);
 
 //     Slic3r::debugf "wxWidgets version %s, Wx version %s\n", wxVERSION_STRING, wxVERSION;
 
@@ -249,6 +253,7 @@ void GUI_App::init_fonts()
 {
     m_small_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
     m_bold_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold();
+    m_normal_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 
 #ifdef __WXMAC__
     m_small_font.SetPointSize(11);

src/slic3r/GUI/GUI_App.hpp

@@ -78,6 +78,7 @@ class GUI_App : public wxApp
 
     wxFont		    m_small_font;
     wxFont		    m_bold_font;
+	wxFont			m_normal_font;
 
     size_t          m_em_unit; // width of a "m"-symbol in pixels for current system font 
                                // Note: for 100% Scale m_em_unit = 10 -> it's a good enough coefficient for a size setting of controls
@@ -106,6 +107,7 @@ public:
 
     const wxFont&   small_font()            { return m_small_font; }
     const wxFont&   bold_font()             { return m_bold_font; }
+    const wxFont&   normal_font()           { return m_normal_font; }
     size_t          em_unit() const         { return m_em_unit; }
     void            set_em_unit(const size_t em_unit)    { m_em_unit = em_unit; }
 

src/slic3r/GUI/MainFrame.cpp

@@ -127,7 +127,9 @@ wxFrame(NULL, wxID_ANY, SLIC3R_BUILD, wxDefaultPosition, wxDefaultSize, wxDEFAUL
 
 void MainFrame::init_tabpanel()
 {
-    m_tabpanel = new wxNotebook(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNB_TOP | wxTAB_TRAVERSAL);
+    // wxNB_NOPAGETHEME: Disable Windows Vista theme for the Notebook background. The theme performance is terrible on Windows 10
+    // with multiple high resolution displays connected.
+    m_tabpanel = new wxNotebook(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNB_TOP | wxTAB_TRAVERSAL | wxNB_NOPAGETHEME);
 
     m_tabpanel->Bind(wxEVT_NOTEBOOK_PAGE_CHANGED, [this](wxEvent&) {
         auto panel = m_tabpanel->GetCurrentPage();

src/slic3r/GUI/Tab.cpp

@@ -1498,6 +1498,7 @@ void TabFilament::build()
         line = optgroup->create_single_option_line("filament_ramming_parameters");// { _(L("Ramming")), "" };
         line.widget = [this](wxWindow* parent) {
 			auto ramming_dialog_btn = new wxButton(parent, wxID_ANY, _(L("Ramming settings"))+dots, wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT);
+			ramming_dialog_btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
             auto sizer = new wxBoxSizer(wxHORIZONTAL);
 			sizer->Add(ramming_dialog_btn);
             
@@ -1633,6 +1634,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 
 	auto printhost_browse = [=](wxWindow* parent) {
 		auto btn = m_printhost_browse_btn = new wxButton(parent, wxID_ANY, _(L(" Browse "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT);
+		btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
         btn->SetBitmap(create_scaled_bitmap("zoom.png"));
 		auto sizer = new wxBoxSizer(wxHORIZONTAL);
 		sizer->Add(btn);
@@ -1651,6 +1653,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 	auto print_host_test = [this](wxWindow* parent) {
 		auto btn = m_print_host_test_btn = new wxButton(parent, wxID_ANY, _(L("Test")), 
 			wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
+		btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
         btn->SetBitmap(create_scaled_bitmap("wrench.png"));
 		auto sizer = new wxBoxSizer(wxHORIZONTAL);
 		sizer->Add(btn);
@@ -1688,6 +1691,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 		auto printhost_cafile_browse = [this, optgroup] (wxWindow* parent) {
 			auto btn = new wxButton(parent, wxID_ANY, _(L(" Browse "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT);
 // 			btn->SetBitmap(wxBitmap(from_u8(Slic3r::var("zoom.png")), wxBITMAP_TYPE_PNG));
+			btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 			btn->SetBitmap(create_scaled_bitmap("zoom.png"));
 			auto sizer = new wxBoxSizer(wxHORIZONTAL);
 			sizer->Add(btn);
@@ -1726,6 +1730,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 \tOn this system, Slic3r uses HTTPS certificates from the system Certificate Store or Keychain.\n\
 \tTo use a custom CA file, please import your CA file into Certificate Store / Keychain.")),
 				ca_file_hint));
+			txt->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 			auto sizer = new wxBoxSizer(wxHORIZONTAL);
 			sizer->Add(txt);
 			return sizer;
@@ -1966,7 +1971,7 @@ void TabPrinter::build_sla()
     Line line = optgroup->create_single_option_line("bed_shape");//{ _(L("Bed shape")), "" };
     line.widget = [this](wxWindow* parent) {
         auto btn = new wxButton(parent, wxID_ANY, _(L(" Set ")) + dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
-        //			btn->SetFont(Slic3r::GUI::small_font);
+        btn->SetFont(wxGetApp().small_font());
 //         btn->SetBitmap(wxBitmap(from_u8(Slic3r::var("printer_empty.png")), wxBITMAP_TYPE_PNG));
         btn->SetBitmap(create_scaled_bitmap("printer_empty.png"));
 
@@ -2883,7 +2888,9 @@ void Tab::update_ui_from_settings()
 wxSizer* Tab::compatible_widget_create(wxWindow* parent, PresetDependencies &deps)
 {
 	deps.checkbox = new wxCheckBox(parent, wxID_ANY, _(L("All")));
+	deps.checkbox->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	deps.btn = new wxButton(parent, wxID_ANY, _(L(" Set "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
+	deps.btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 
 // 	deps.btn->SetBitmap(wxBitmap(from_u8(Slic3r::var("printer_empty.png")), wxBITMAP_TYPE_PNG));
     deps.btn->SetBitmap(create_scaled_bitmap("printer_empty.png"));