WIP (NewUI with fonts): Improvements some controls

* SpinInput : Code refactoring
 * BitmapToggleButton :
     * Create wxBitmapToggleButton if control doesn't have a label and wxToggleButton otherwise
     * Linux specific: Calculate default size from label size

 + Tab: Linux specific: Set background color for tree_ctrl and don't set background color for Tab

src/slic3r/GUI/Tab.cpp

@@ -86,7 +86,7 @@ Tab::Tab(wxBookCtrlBase* parent, const wxString& title, Preset::Type type) :
 
 #ifdef __WXMSW__
     wxGetApp().UpdateDarkUI(this);
-#else
+#elif __WXOSX__
     SetBackgroundColour(parent->GetBackgroundColour());
 #endif
 
@@ -296,6 +296,9 @@ void Tab::create_preset_tab()
     m_treectrl = new wxTreeCtrl(panel, wxID_ANY, wxDefaultPosition, wxSize(20 * m_em_unit, -1),
         wxTR_NO_BUTTONS | wxTR_HIDE_ROOT | wxTR_SINGLE | wxTR_NO_LINES | wxBORDER_SUNKEN | wxWANTS_CHARS);
     m_treectrl->SetFont(wxGetApp().normal_font());
+#ifdef __linux__
+    m_treectrl->SetBackgroundColour(m_parent->GetBackgroundColour());
+#endif
     m_left_sizer->Add(m_treectrl, 1, wxEXPAND);
     // Index of the last icon inserted into m_treectrl
     m_icon_count = -1;

src/slic3r/GUI/Tab.hpp

@@ -73,7 +73,7 @@ class SubstitutionManager
 	std::function<void()> m_cb_hide_delete_all_btn{ nullptr };
 
 	std::vector<std::string>	m_substitutions;
-	std::vector<wxCheckBox*>	m_chb_match_single_lines;
+	std::vector<wxWindow*>		m_chb_match_single_lines;
 
 	void validate_length();
 	bool is_compatible_with_ui();

src/slic3r/GUI/Widgets/BitmapToggleButton.cpp

@@ -4,17 +4,17 @@
 
 BitmapToggleButton::BitmapToggleButton(wxWindow* parent, const wxString& label, wxWindowID id)
 {
+    if (label.IsEmpty())
+        wxBitmapToggleButton::Create(parent, id, wxNullBitmap, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE | wxBU_EXACTFIT);
+    else {
 #ifdef __linux__
-    long style = wxBORDER_NONE | wxBU_EXACTFIT;
-	if (label.IsEmpty())
-		style = style | wxBU_NOTEXT;
-	// Call Create() from wxToggleButton instead of wxBitmapToggleButton to allow add Label text under Linux
-	wxToggleButton::Create(parent, id, label, wxDefaultPosition, wxDefaultSize, style);
+        wxSize def_size = wxSize(parent->GetTextExtent(label).GetX() + 20, 20);
 #else
-	wxBitmapToggleButton::Create(parent, id, wxNullBitmap, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE | wxBU_EXACTFIT);
-	if (!label.IsEmpty())
-		SetLabel(label);
+        wxSize def_size = wxDefaultSize;
 #endif
+        // Call Create() from wxToggleButton instead of wxBitmapToggleButton to allow add Label text under Linux
+        wxToggleButton::Create(parent, id, label, wxDefaultPosition, def_size, wxBORDER_NONE | wxBU_EXACTFIT);
+    }
 
 #ifdef __WXMSW__
 	if (parent) {
@@ -22,7 +22,7 @@ BitmapToggleButton::BitmapToggleButton(wxWindow* parent, const wxString& label,
 		SetForegroundColour(parent->GetForegroundColour());
 	}
 #elif __linux__
-	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 #endif
 
     Bind(wxEVT_TOGGLEBUTTON, [this](auto& e) {
@@ -39,9 +39,14 @@ BitmapToggleButton::BitmapToggleButton(wxWindow* parent, const wxString& label,
 void BitmapToggleButton::update_size()
 {
 #ifdef __linux__
+    wxSize bmp_sz = GetBitmap().GetSize();
+    wxSize sz = GetSize();
 	if (GetLabel().IsEmpty())
-		SetSize(GetBitmap().GetSize());
-	else
+        SetSize(bmp_sz);
+    else
+        SetSize(sz.x, bmp_sz.y);
+#else
+    wxSize best_sz = GetBestSize();
+    SetSize(best_sz);
 #endif
-	    SetSize(GetBestSize());
 }

src/slic3r/GUI/Widgets/DropDown.cpp

@@ -87,7 +87,6 @@ void DropDown::Invalidate(bool clear)
 
 void DropDown::SetSelection(int n)
 {
-    assert(n < (int) texts.size());
     if (n >= (int) texts.size())
         n = -1;
     if (selection == n) return;

src/slic3r/GUI/Widgets/SpinInput.cpp

@@ -73,8 +73,8 @@ void SpinInput::Create(wxWindow *parent,
     text_ctrl->Bind(wxEVT_TEXT_ENTER, &SpinInput::onTextEnter, this);
     text_ctrl->Bind(wxEVT_KEY_DOWN, &SpinInput::keyPressed, this);
     text_ctrl->Bind(wxEVT_RIGHT_DOWN, [this](auto &e) {}); // disable context menu
-    button_inc = createButton(true);
-    button_dec = createButton(false);
+    button_inc = create_button(ButtonId::btnIncrease);
+    button_dec = create_button(ButtonId::btnDecrease);
     delta      = 0;
     timer.Bind(wxEVT_TIMER, &SpinInput::onTimer, this);
 
@@ -265,11 +265,11 @@ void SpinInput::render(wxDC& dc)
     // draw seperator of buttons
     wxPoint pt = button_inc->GetPosition();
     pt.y = size.y / 2;
-    pt.x += 1;
     dc.SetPen(wxPen(border_color.defaultColor()));
 
     const double scale = dc.GetContentScaleFactor();
-    dc.DrawLine(pt, pt + wxSize{button_inc->GetSize().x - int(3. * scale), 0});
+    const int    btn_w = button_inc->GetSize().GetWidth();
+    dc.DrawLine(pt, pt + wxSize{ btn_w - int(scale), 0});
     // draw label
     auto label = GetLabel();
     if (!label.IsEmpty()) {
@@ -308,16 +308,16 @@ void SpinInput::messureSize()
     button_dec->SetPosition({size.x - btnSize.x - int(3. * scale), size.y / 2 + 1});
 }
 
-Button *SpinInput::createButton(bool inc)
+Button *SpinInput::create_button(ButtonId id)
 {
-    auto btn = new Button(this, "", inc ? "spin_inc_act" : "spin_dec_act", wxBORDER_NONE, wxSize(12, 7));
+    auto btn = new Button(this, "", id == ButtonId::btnIncrease ? "spin_inc_act" : "spin_dec_act", wxBORDER_NONE, wxSize(12, 7));
     btn->SetCornerRadius(0);
-    btn->SetInactiveIcon(inc ? "spin_inc" : "spin_dec");
+    btn->SetInactiveIcon(id == ButtonId::btnIncrease ? "spin_inc" : "spin_dec");
     btn->DisableFocusFromKeyboard();
     btn->SetSelected(false);
 
     btn->Bind(wxEVT_LEFT_DOWN, [=](auto &e) {
-        delta = inc ? 1 : -1;
+        delta = id == ButtonId::btnIncrease ? 1 : -1;
         SetValue(val + delta);
         text_ctrl->SetFocus();
         btn->CaptureMouse();
@@ -326,7 +326,7 @@ Button *SpinInput::createButton(bool inc)
         sendSpinEvent();
     });
     btn->Bind(wxEVT_LEFT_DCLICK, [=](auto &e) {
-        delta = inc ? 1 : -1;
+        delta = id == ButtonId::btnIncrease ? 1 : -1;
         btn->CaptureMouse();
         SetValue(val + delta);
         sendSpinEvent();

src/slic3r/GUI/Widgets/SpinInput.hpp

@@ -24,6 +24,12 @@ class SpinInput : public wxNavigationEnabled<StaticBox>
     static const int SpinInputWidth = 200;
     static const int SpinInputHeight = 50;
 
+    enum class ButtonId
+    {
+        btnIncrease,
+        btnDecrease
+    };
+
 public:
     SpinInput();
 
@@ -90,7 +96,7 @@ private:
 
     void messureSize();
 
-    Button *createButton(bool inc);
+    Button *create_button(ButtonId id);
 
     // some useful events
     void mouseWheelMoved(wxMouseEvent& event);