Design tab: Text dialog with font, height and live outline; offer header

- Text opens a dialog instead of a bare text entry: any installed font
  (bold, italic), the height in mm, and a live outline of exactly what
  will be inserted with its size. Enter inserts, Esc cancels; the last
  font and height are remembered. text_to_regions gains an overload
  taking a loaded font.
- The offer menu opens with a greyed title naming what the rows act on
  ("Flat face 4 of Body 2", "Sketch line", "Nothing selected").

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QK4VgguuCAk2hZLWgcjJb9

docs/CAD/design_tab.md

@@ -60,6 +60,9 @@ pointing at things stays quiet.
 The offer also opens by itself the moment you press Sketch on a face or plane, showing the
 sketch tools — the app hands you the tools directly.
 
+The first line names what the rows act on — *"Flat face 4 of Body 2"*, *"Sketch line"*,
+*"Nothing selected"* — so the menu is readable even when the selection is not under the cursor.
+
 **Eight families, always in this fixed order:** Create, Add material, Remove, Dress-up,
 Repeat, Transform, Reference, Modify.
 
@@ -302,6 +305,10 @@ variable and the whole model follows.
 
 ## Import and export
 
+**Text** asks for the words, the font (any installed font, bold, italic) and the height, and
+shows the outline that will be inserted with its size in millimetres before anything is added.
+The last font and height are remembered.
+
 **Import STEP** brings in a real B-rep solid, not a mesh: its faces and edges can be filleted,
 shelled and cut like anything modelled here.
 

localization/i18n/list.txt

@@ -301,6 +301,7 @@ src/slic3r/GUI/CAD/DesignPanel.cpp
 src/slic3r/GUI/CAD/DesignSketchTool.cpp
 src/slic3r/GUI/CAD/SketchInlineEditor.cpp
 src/slic3r/GUI/CAD/DesignOffer.hpp
+src/slic3r/GUI/CAD/DesignTextDialog.cpp
 src/slic3r/GUI/Gizmos/GLGizmoPrimitive.cpp
 src/slic3r/GUI/Gizmos/GLGizmoSketch.cpp
 src/slic3r/GUI/KeyChord.cpp

src/libslic3r/CAD/SketchImport.cpp

@@ -67,12 +67,18 @@ ImportRegions text_to_regions(const std::string& utf8, double size_mm,
         return {};
 
     const std::string path = font_path.empty() ? default_font_path() : font_path;
-    std::unique_ptr<Emboss::FontFile> ff = Emboss::create_font_file(path.c_str());
-    if (!ff)
-        return {};
-    Emboss::FontFileWithCache fwc(std::move(ff));
-    if (!fwc.has_value())
+    return text_to_regions(utf8, size_mm,
+                           std::shared_ptr<const Emboss::FontFile>(Emboss::create_font_file(path.c_str())));
+}
+
+ImportRegions text_to_regions(const std::string& utf8, double size_mm,
+                              const std::shared_ptr<const Emboss::FontFile>& ff)
+{
+    if (utf8.empty() || size_mm <= 0.0 || !ff)
         return {};
+    Emboss::FontFileWithCache fwc;
+    fwc.font_file = ff;
+    fwc.cache     = std::make_shared<Emboss::Glyphs>();
 
     FontProp prop(static_cast<float>(size_mm));   // per_glyph=false
     HealedExPolygons healed = Emboss::text2shapes(fwc, utf8.c_str(), prop);

src/libslic3r/CAD/SketchImport.hpp

@@ -3,11 +3,14 @@
 
 #include "libslic3r/Point.hpp"   // Vec2d
 
+#include <memory>
 #include <string>
 #include <vector>
 
 namespace Slic3r {
 
+namespace Emboss { struct FontFile; }
+
 // A rigid imported region: contour[0] = outer loop, contour[1..] = holes;
 // points in plane (u,v) millimetres. The nested vector type matches
 // CadFeature::imported_regions exactly, so results assign directly.
@@ -19,6 +22,11 @@ using ImportRegions = std::vector<ImportRegion>;
 // font (resources/fonts). Returns an empty vector on any failure.
 ImportRegions text_to_regions(const std::string& utf8, double size_mm,
                               const std::string& font_path = std::string());
+// Same, from an already loaded font — the GUI resolves a system font (face, bold, italic)
+// to one and keeps it while the user types. Returns an empty vector when the font is null or
+// yields no shape.
+ImportRegions text_to_regions(const std::string& utf8, double size_mm,
+                              const std::shared_ptr<const Emboss::FontFile>& font);
 
 // Parse an SVG file's filled paths into regions (mm), centred on the origin.
 // `scale` multiplies the authored size (1.0 = as authored). Returns an empty

src/slic3r/CMakeLists.txt

@@ -820,6 +820,8 @@ if (SLIC3R_CAD)
     list(APPEND SLIC3R_GUI_SOURCES
         GUI/CAD/DesignPanel.cpp
         GUI/CAD/DesignPanel.hpp
+        GUI/CAD/DesignTextDialog.cpp
+        GUI/CAD/DesignTextDialog.hpp
         GUI/CAD/DesignCanvas.cpp
         GUI/CAD/DesignCanvas.hpp
         GUI/CAD/DesignSketchTool.cpp

src/slic3r/GUI/CAD/DesignPanel.cpp

@@ -1,6 +1,7 @@
 #include "slic3r/GUI/CAD/DesignPanel.hpp"
 #include "slic3r/GUI/CAD/DesignCanvas.hpp"
 #include "slic3r/GUI/CAD/DesignSketchTool.hpp"
+#include "slic3r/GUI/CAD/DesignTextDialog.hpp"           // Text: font, height, live outline
 #include "slic3r/GUI/CAD/DesignOffer.hpp"                // generated offer table — see docs/ux/tool_atlas.json
 #include "libslic3r/CAD/GeometryEngine.hpp"   // face_by_index for face-extrude gizmo anchor
 #include "libslic3r/TriangleMesh.hpp"     // mesh import: STL/OBJ -> indexed_triangle_set
@@ -4562,15 +4563,12 @@ void DesignPanel::sync_sketch_display()
 
 void DesignPanel::on_add_text()
 {
-    wxTextEntryDialog dlg(this, _L("Text to insert:"), _L("Text"), wxEmptyString);
-    if (dlg.ShowModal() != wxID_OK)
+    // Font, height and a live outline with its size are chosen up front; the bbox handles
+    // (Move/Scale) still resize the art in the canvas afterwards.
+    DesignTextDialog dlg(this);
+    if (dlg.ShowModal() != wxID_OK || dlg.regions().empty())
         return;
-    const wxString text = dlg.GetValue();
-    if (text.empty())
-        return;
-    const std::string utf8(text.ToUTF8().data());
-    // Insert at a default height; resize in-canvas via the bbox handles (Move/Scale).
-    add_imported_sketch(text_to_regions(utf8, 10.0), _L("Text"));
+    add_imported_sketch(dlg.regions(), _L("Text"));
 }
 
 void DesignPanel::on_import_svg()
@@ -6369,6 +6367,38 @@ static void offer_trace(const char* fmt, ...)
     fflush(stderr);
 }
 
+// The offer menu's title line for selection `kind` (an OfferSel), or empty for none.
+wxString DesignPanel::offer_header(int kind) const
+{
+    const int nb = int(m_doc.bodies.size());
+    auto body = [&]() {
+        if (m_sel_solid_body < 0 || m_sel_solid_body >= nb) return wxString();
+        const std::string& n = m_doc.bodies[m_sel_solid_body].name;
+        return n.empty() ? wxString::Format(_L("Body %d"), m_sel_solid_body + 1) : wxString::FromUTF8(n);
+    };
+    switch (OfferSel(kind)) {
+    case OfferSel::None:       return _L("Nothing selected");
+    case OfferSel::BodySolid:  return wxString::Format(_L("%s — solid body"), body());
+    case OfferSel::BodySheet:  return wxString::Format(_L("%s — surface body"), body());
+    case OfferSel::FacePlanar: return wxString::Format(_L("Flat face %d of %s"), m_sel_solid_face, body());
+    case OfferSel::FaceCyl:    return wxString::Format(_L("Cylindrical face %d of %s"), m_sel_solid_face, body());
+    case OfferSel::FaceOther:  return wxString::Format(_L("Face %d of %s"), m_sel_solid_face, body());
+    case OfferSel::EdgeStr:    return wxString::Format(_L("Straight edge %d of %s"), m_sel_solid_edge, body());
+    case OfferSel::EdgeCirc:   return wxString::Format(_L("Circular edge %d of %s"), m_sel_solid_edge, body());
+    case OfferSel::Vertex:     return wxString::Format(_L("Vertex of %s"), body());
+    case OfferSel::SkLoop:     return _L("Sketch profile");
+    case OfferSel::SkNone:     return _L("Sketch — nothing selected");
+    case OfferSel::SkLine:     return _L("Sketch line");
+    case OfferSel::SkArc:      return _L("Sketch curve");
+    case OfferSel::SkPoint:    return _L("Sketch point");
+    case OfferSel::Sk2Ent: {
+        const int n = m_viewport ? m_viewport->sketch_selection_count() : 0;
+        return wxString::Format(_L("%d sketch entities"), n);
+    }
+    default:                   return wxString();
+    }
+}
+
 void DesignPanel::show_offer_menu(const wxPoint& screen_pos)
 {
     const int      kind = offer_selection_kind();
@@ -6420,6 +6450,17 @@ void DesignPanel::show_offer_menu(const wxPoint& screen_pos)
     std::vector<const OfferVerb*> bound;      // menu id offset -> verb
     const int base = wxID_HIGHEST + 4200;
 
+    // Header: WHAT the rows below act on, named the way the tree and the cards name it. The rows
+    // only make sense against the selection, and the selection is not always visible under the
+    // cursor that opened the menu. Greyed, so it reads as a title and cannot be run.
+    {
+        const wxString head = offer_header(kind);
+        if (!head.empty()) {
+            menu.Append(wxID_ANY, head)->Enable(false);
+            menu.AppendSeparator();
+        }
+    }
+
     for (int row = 0; row < kOfferRowCount; ++row) {
         std::vector<const OfferVerb*> live, family;
         for (int i = 0; i < kOfferVerbCount; ++i) {

src/slic3r/GUI/CAD/DesignPanel.hpp

@@ -755,6 +755,7 @@ private:
     // monitor, and the menu would map there — detached from the geometry it is about.
     wxPoint offer_anchor() const;
     int  offer_selection_kind() const;          // an OfferSel, as int to keep the header light
+    wxString offer_header(int kind) const;      // the offer menu's title line for that selection
     // Does the SKETCH half of the map apply? A mode question, not a session one: begin_sketch
     // does not run until the first tool is armed, so between "press Sketch" and "pick a tool"
     // is_sketching() is still false — precisely when the drawing tools must be on offer. The

src/slic3r/GUI/CAD/DesignTextDialog.cpp

@@ -0,0 +1,223 @@
+#include "DesignTextDialog.hpp"
+
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/Widgets/DialogButtons.hpp"
+#include "slic3r/Utils/WxFontUtils.hpp"
+#include "libslic3r/AppConfig.hpp"
+#include "libslic3r/Emboss.hpp"
+
+#include <wx/checkbox.h>
+#include <wx/choice.h>
+#include <wx/dcbuffer.h>
+#include <wx/fontenum.h>
+#include <wx/graphics.h>
+#include <wx/sizer.h>
+#include <wx/spinctrl.h>
+#include <wx/stattext.h>
+#include <wx/textctrl.h>
+
+#include <algorithm>
+#include <limits>
+
+namespace Slic3r { namespace GUI {
+
+static const char* kFontKey   = "cad_text_font";     // WxFontUtils::store_wxFont descriptor
+static const char* kHeightKey = "cad_text_height";   // mm
+
+DesignTextDialog::DesignTextDialog(wxWindow* parent)
+    : DPIDialog(parent, wxID_ANY, _L("Text"), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE)
+{
+    SetFont(wxGetApp().normal_font());
+    SetBackgroundColour(wxGetApp().dark_mode() ? wxColour(0x2d, 0x2d, 0x31) : *wxWHITE);
+    const int em = em_unit();
+
+    // Last used font and height, else the system GUI font at 10 mm.
+    wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    double height = 10.0;
+    if (AppConfig* cfg = wxGetApp().app_config) {
+        const std::string desc = cfg->get(kFontKey);
+        if (!desc.empty()) {
+            wxFont f = WxFontUtils::load_wxFont(desc);
+            if (f.IsOk()) font = f;
+        }
+        const std::string h = cfg->get(kHeightKey);
+        if (!h.empty()) {
+            try { height = std::clamp(std::stod(h), 0.5, 500.0); } catch (...) {}
+        }
+    }
+
+    auto* form = new wxFlexGridSizer(2, em / 2, em);
+    form->AddGrowableCol(1, 1);
+
+    m_text = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(30 * em, -1),
+                            wxTE_PROCESS_ENTER);
+    m_text->SetHint(_L("Type the text to insert"));
+    form->Add(new wxStaticText(this, wxID_ANY, _L("Text")), 0, wxALIGN_CENTER_VERTICAL);
+    form->Add(m_text, 1, wxEXPAND);
+
+    // Scalable faces only ('@' faces are the vertical-writing aliases GTK/MSW list twice).
+    wxArrayString faces = wxFontEnumerator::GetFacenames(wxFONTENCODING_SYSTEM, false);
+    faces.erase(std::remove_if(faces.begin(), faces.end(), [](const wxString& f) { return f.StartsWith("@"); }),
+                faces.end());
+    faces.Sort();
+    m_face = new wxChoice(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, faces);
+    int sel = m_face->FindString(font.GetFaceName());
+    m_face->SetSelection(sel != wxNOT_FOUND ? sel : 0);
+    form->Add(new wxStaticText(this, wxID_ANY, _L("Font")), 0, wxALIGN_CENTER_VERTICAL);
+    form->Add(m_face, 1, wxEXPAND);
+
+    auto* style = new wxBoxSizer(wxHORIZONTAL);
+    m_bold   = new wxCheckBox(this, wxID_ANY, _L("Bold"));
+    m_italic = new wxCheckBox(this, wxID_ANY, _L("Italic"));
+    m_bold->SetValue(WxFontUtils::is_bold(font));
+    m_italic->SetValue(WxFontUtils::is_italic(font));
+    style->Add(m_bold, 0, wxRIGHT, em);
+    style->Add(m_italic, 0);
+    form->AddSpacer(0);
+    form->Add(style, 0);
+
+    m_height = new wxSpinCtrlDouble(this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(10 * em, -1),
+                                    wxSP_ARROW_KEYS, 0.5, 500.0, height, 0.5);
+    m_height->SetDigits(1);
+    form->Add(new wxStaticText(this, wxID_ANY, _L("Height (mm)")), 0, wxALIGN_CENTER_VERTICAL);
+    form->Add(m_height, 0);
+
+    // The outline of what will be inserted, fitted to the box, with its real size under it.
+    m_preview = new wxWindow(this, wxID_ANY, wxDefaultPosition, wxSize(30 * em, 10 * em));
+    m_preview->SetBackgroundStyle(wxBG_STYLE_PAINT);
+    m_preview->Bind(wxEVT_PAINT, [this](wxPaintEvent&) { draw_preview(m_preview); });
+    m_preview->Bind(wxEVT_SIZE, [this](wxSizeEvent& e) { m_preview->Refresh(); e.Skip(); });
+    m_size = new wxStaticText(this, wxID_ANY, wxEmptyString);
+
+    auto* buttons = new DialogButtons(this, {"OK", "Cancel"});
+    m_ok = buttons->GetOK();
+
+    auto* top = new wxBoxSizer(wxVERTICAL);
+    top->Add(form, 0, wxEXPAND | wxALL, em);
+    top->Add(m_preview, 1, wxEXPAND | wxLEFT | wxRIGHT, em);
+    top->Add(m_size, 0, wxLEFT | wxRIGHT | wxTOP, em);
+    top->Add(buttons, 0, wxEXPAND);
+
+    m_text->Bind(wxEVT_TEXT, [this](wxCommandEvent&) { update_preview(); });
+    m_text->Bind(wxEVT_TEXT_ENTER, [this](wxCommandEvent&) {
+        if (!m_regions.empty()) EndModal(wxID_OK);   // Enter = OK, as everywhere in the tab
+    });
+    auto refont = [this](wxCommandEvent&) { load_font(); update_preview(); };
+    m_face->Bind(wxEVT_CHOICE, refont);
+    m_bold->Bind(wxEVT_CHECKBOX, refont);
+    m_italic->Bind(wxEVT_CHECKBOX, refont);
+    m_height->Bind(wxEVT_SPINCTRLDOUBLE, [this](wxSpinDoubleEvent&) { update_preview(); });
+    m_height->Bind(wxEVT_TEXT, [this](wxCommandEvent&) { update_preview(); });
+    Bind(wxEVT_BUTTON, [this](wxCommandEvent& e) {
+        if (e.GetId() != wxID_OK) { e.Skip(); return; }
+        if (m_regions.empty()) return;              // nothing to insert: the size line says why
+        if (AppConfig* cfg = wxGetApp().app_config) {
+            cfg->set(kFontKey, WxFontUtils::store_wxFont(current_font()));
+            cfg->set(kHeightKey, std::to_string(m_height->GetValue()));
+        }
+        EndModal(wxID_OK);
+    });
+
+    wxGetApp().UpdateDlgDarkUI(this);
+    SetSizerAndFit(top);
+    CenterOnParent();
+
+    load_font();
+    update_preview();
+    m_text->SetFocus();
+}
+
+wxString DesignTextDialog::text() const { return m_text->GetValue(); }
+
+wxFont DesignTextDialog::current_font() const
+{
+    wxFontInfo info(12);
+    if (m_face->GetSelection() != wxNOT_FOUND)
+        info.FaceName(m_face->GetStringSelection());
+    info.Bold(m_bold->GetValue()).Italic(m_italic->GetValue());
+    return wxFont(info);
+}
+
+void DesignTextDialog::load_font()
+{
+    const wxFont font = current_font();
+    m_font_file.reset();
+    if (font.IsOk() && WxFontUtils::can_load(font))
+        m_font_file = WxFontUtils::create_font_file(font);
+}
+
+void DesignTextDialog::update_preview()
+{
+    const std::string utf8(m_text->GetValue().ToUTF8().data());
+    m_regions.clear();
+    if (m_font_file && !utf8.empty())
+        m_regions = text_to_regions(utf8, m_height->GetValue(), m_font_file);
+
+    wxString line;
+    if (!m_font_file)
+        line = _L("This font cannot be used for text — pick another one");
+    else if (utf8.empty())
+        line = _L("Type the text to see its size");
+    else if (m_regions.empty())
+        line = _L("This font has no outline for this text");
+    else {
+        double lo_x = std::numeric_limits<double>::max(), lo_y = lo_x;
+        double hi_x = -lo_x, hi_y = -lo_x;
+        for (const auto& r : m_regions)
+            for (const auto& c : r)
+                for (const Vec2d& p : c) {
+                    lo_x = std::min(lo_x, p.x()); hi_x = std::max(hi_x, p.x());
+                    lo_y = std::min(lo_y, p.y()); hi_y = std::max(hi_y, p.y());
+                }
+        line = wxString::Format(_L("Size: %.1f × %.1f mm"), hi_x - lo_x, hi_y - lo_y);
+    }
+    m_size->SetLabel(line);
+    if (m_ok) m_ok->Enable(!m_regions.empty());
+    m_preview->Refresh();
+}
+
+void DesignTextDialog::draw_preview(wxWindow* canvas)
+{
+    wxAutoBufferedPaintDC dc(canvas);
+    const bool dark = wxGetApp().dark_mode();
+    dc.SetBackground(wxBrush(dark ? wxColour(0x1e, 0x1e, 0x22) : wxColour(0xf4, 0xf4, 0xf6)));
+    dc.Clear();
+    if (m_regions.empty()) return;
+
+    double lo_x = std::numeric_limits<double>::max(), lo_y = lo_x, hi_x = -lo_x, hi_y = -lo_x;
+    for (const auto& r : m_regions)
+        for (const auto& c : r)
+            for (const Vec2d& p : c) {
+                lo_x = std::min(lo_x, p.x()); hi_x = std::max(hi_x, p.x());
+                lo_y = std::min(lo_y, p.y()); hi_y = std::max(hi_y, p.y());
+            }
+    const wxSize sz  = canvas->GetClientSize();
+    const double pad = 0.08 * std::min(sz.x, sz.y);
+    const double w = std::max(hi_x - lo_x, 1e-6), h = std::max(hi_y - lo_y, 1e-6);
+    const double k = std::min((sz.x - 2 * pad) / w, (sz.y - 2 * pad) / h);
+    const double ox = 0.5 * (sz.x - k * w), oy = 0.5 * (sz.y + k * h);   // y up -> screen y down
+
+    std::unique_ptr<wxGraphicsContext> gc(wxGraphicsContext::Create(dc));
+    if (!gc) return;
+    wxGraphicsPath path = gc->CreatePath();
+    for (const auto& r : m_regions)
+        for (const auto& c : r) {
+            if (c.empty()) continue;
+            path.MoveToPoint(ox + k * (c[0].x() - lo_x), oy - k * (c[0].y() - lo_y));
+            for (size_t i = 1; i < c.size(); ++i)
+                path.AddLineToPoint(ox + k * (c[i].x() - lo_x), oy - k * (c[i].y() - lo_y));
+            path.CloseSubpath();
+        }
+    gc->SetBrush(wxBrush(wxColour(0x00, 0x96, 0x88)));   // Orca accent
+    gc->SetPen(*wxTRANSPARENT_PEN);
+    gc->FillPath(path, wxODDEVEN_RULE);                    // holes (the counter of an "o") stay open
+}
+
+void DesignTextDialog::on_dpi_changed(const wxRect&)
+{
+    Fit();
+    Refresh();
+}
+
+}} // namespace Slic3r::GUI

src/slic3r/GUI/CAD/DesignTextDialog.hpp

@@ -0,0 +1,59 @@
+#ifndef slic3r_GUI_DesignTextDialog_hpp_
+#define slic3r_GUI_DesignTextDialog_hpp_
+
+#include "slic3r/GUI/GUI_Utils.hpp"
+#include "libslic3r/CAD/SketchImport.hpp"
+
+#include <wx/font.h>
+
+#include <memory>
+
+class wxTextCtrl;
+class wxChoice;
+class wxCheckBox;
+class wxSpinCtrlDouble;
+class wxStaticText;
+
+namespace Slic3r {
+namespace Emboss { struct FontFile; }
+namespace GUI {
+
+// Text for the Design tab: the words, the font (face, bold, italic) and the height, with a
+// live outline of exactly what will be inserted and its size in millimetres. The outline IS
+// the result — the same vectorisation the sketch receives — so there is nothing to guess.
+// Enter inserts, Esc cancels (charter 4.2). The last font and height are remembered.
+class DesignTextDialog : public DPIDialog
+{
+public:
+    explicit DesignTextDialog(wxWindow* parent);
+
+    // The vectorised text, centred on the origin, in mm. Empty unless the dialog ended wxID_OK.
+    const ImportRegions& regions() const { return m_regions; }
+    wxString             text() const;
+
+protected:
+    void on_dpi_changed(const wxRect& suggested_rect) override;
+
+private:
+    void     load_font();          // m_face/m_bold/m_italic -> m_font_file
+    void     update_preview();     // text/font/height -> m_regions + size label
+    wxFont   current_font() const;
+    void     draw_preview(wxWindow* canvas);
+
+    wxTextCtrl*       m_text{nullptr};
+    wxChoice*         m_face{nullptr};
+    wxCheckBox*       m_bold{nullptr};
+    wxCheckBox*       m_italic{nullptr};
+    wxSpinCtrlDouble* m_height{nullptr};
+    wxWindow*         m_preview{nullptr};
+    wxStaticText*     m_size{nullptr};
+    wxWindow*         m_ok{nullptr};
+
+    std::shared_ptr<const Emboss::FontFile> m_font_file;
+    ImportRegions                           m_regions;
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GUI_DesignTextDialog_hpp_