Add option for displaying dimensions in feet and inches

src/graphicswin.cpp

@@ -98,6 +98,7 @@ const MenuEntry Menu[] = {
 { 2, N_("Dimensions in &Millimeters"),  Command::UNITS_MM,         0,       KR, mView },
 { 2, N_("Dimensions in M&eters"),       Command::UNITS_METERS,     0,       KR, mView },
 { 2, N_("Dimensions in &Inches"),       Command::UNITS_INCHES,     0,       KR, mView },
+{ 2, N_("Dimensions in &Feet and Inches"), Command::UNITS_FEET_INCHES, 0,   KR, mView },
 { 1,  NULL,                             Command::NONE,             0,       KN, NULL   },
 { 1, N_("Show &Toolbar"),               Command::SHOW_TOOLBAR,     0,       KC, mView  },
 { 1, N_("Show Property Bro&wser"),      Command::SHOW_TEXT_WND,    '\t',    KC, mView  },
@@ -329,6 +330,8 @@ void GraphicsWindow::PopulateMainMenu() {
                 unitsMetersMenuItem = menuItem;
             } else if(Menu[i].cmd == Command::UNITS_INCHES) {
                 unitsInchesMenuItem = menuItem;
+            } else if(Menu[i].cmd == Command::UNITS_FEET_INCHES) {
+                unitsFeetInchesMenuItem = menuItem;
             } else if(Menu[i].cmd == Command::SEL_WORKPLANE) {
                 inWorkplaneMenuItem = menuItem;
             } else if(Menu[i].cmd == Command::FREE_IN_3D) {
@@ -843,6 +846,12 @@ void GraphicsWindow::MenuView(Command id) {
             SS.GW.EnsureValidActives();
             break;
 
+        case Command::UNITS_FEET_INCHES:
+            SS.viewUnits = Unit::FEET_INCHES;
+            SS.ScheduleShowTW();
+            SS.GW.EnsureValidActives();
+            break;
+
         case Command::UNITS_MM:
             SS.viewUnits = Unit::MM;
             SS.ScheduleShowTW();
@@ -925,6 +934,7 @@ void GraphicsWindow::EnsureValidActives() {
         case Unit::MM:
         case Unit::METERS:
         case Unit::INCHES:
+        case Unit::FEET_INCHES:
             break;
         default:
             SS.viewUnits = Unit::MM;
@@ -933,6 +943,7 @@ void GraphicsWindow::EnsureValidActives() {
     unitsMmMenuItem->SetActive(SS.viewUnits == Unit::MM);
     unitsMetersMenuItem->SetActive(SS.viewUnits == Unit::METERS);
     unitsInchesMenuItem->SetActive(SS.viewUnits == Unit::INCHES);
+    unitsFeetInchesMenuItem->SetActive(SS.viewUnits == Unit::FEET_INCHES);
 
     if(SS.TW.window) SS.TW.window->SetVisible(SS.GW.showTextWindow);
     showTextWndMenuItem->SetActive(SS.GW.showTextWindow);

src/mouse.cpp

@@ -1378,7 +1378,7 @@ void GraphicsWindow::EditConstraint(hConstraint constraint) {
             } else if(c->type == Constraint::Type::ANGLE) {
                 editValue = SS.DegreeToString(value);
             } else {
-                editValue = SS.MmToString(value);
+                editValue = SS.MmToString(value, true);
                 value /= SS.MmPerUnit();
             }
             // If that's not enough to represent it exactly, show the value with as many

src/solvespace.cpp

@@ -315,6 +315,7 @@ void SolveSpaceUI::ScheduleAutosave() {
 double SolveSpaceUI::MmPerUnit() {
     switch(viewUnits) {
         case Unit::INCHES: return 25.4;
+        case Unit::FEET_INCHES: return 25.4; // The 'unit' is still inches
         case Unit::METERS: return 1000.0;
         case Unit::MM: return 1.0;
     }
@@ -323,22 +324,42 @@ double SolveSpaceUI::MmPerUnit() {
 const char *SolveSpaceUI::UnitName() {
     switch(viewUnits) {
         case Unit::INCHES: return "in";
+        case Unit::FEET_INCHES: return "in";
         case Unit::METERS: return "m";
         case Unit::MM: return "mm";
     }
     return "";
 }
 
-std::string SolveSpaceUI::MmToString(double v) {
+std::string SolveSpaceUI::MmToString(double v, bool editable) {
     v /= MmPerUnit();
+    int feet = 0;
+    // The syntax 2' 6" for feet and inches is not something we can (currently)
+    // parse back from a string so if editable is true, we treat FEET_INCHES the
+    // same as INCHES and just return the unadorned decimal number of inches.
+    if(viewUnits == Unit::FEET_INCHES && !editable) {
+        // v is in inches at this point
+        feet = (int)(v / 12.0);
+        v = v - (feet * 12.0);
+        // v is now the remainder in inches
+    }
     int digits = UnitDigitsAfterDecimal();
     double minimum = 0.5 * pow(10,-digits);
-    while ((v < minimum) && (v > LENGTH_EPS)) {
+    while ((feet == 0) && (v < minimum) && (v > LENGTH_EPS)) {
         digits++;
         minimum *= 0.1;
     }
+
+    if(viewUnits == Unit::FEET_INCHES && !editable) {
+        if(feet != 0) {
+            return ssprintf("%d' %.*f\"", feet, digits, v);
+        } else {
+            return ssprintf("%.*f\"", digits, v);
+        }
+    } else {
         return ssprintf("%.*f", digits, v);
     }
+}
 static const char *DimToString(int dim) {
     switch(dim) {
         case 3: return "³";
@@ -394,17 +415,22 @@ std::string SolveSpaceUI::MmToStringSI(double v, int dim) {
         dim = 1;
     }
 
-    v /= pow((viewUnits == Unit::INCHES) ? 25.4 : 1000, dim);
+    bool inches = (viewUnits == Unit::INCHES) || (viewUnits == Unit::FEET_INCHES);
+    v /= pow(inches ? 25.4 : 1000, dim);
     int vdeg = (int)(log10(fabs(v)));
     std::string unit;
     if(fabs(v) > 0.0) {
         int sdeg = 0;
         std::tie(sdeg, unit) =
-            (viewUnits == Unit::INCHES)
+            inches
             ? SelectSIPrefixInch(vdeg/dim)
             : SelectSIPrefixMm(vdeg, dim);
         v /= pow(10.0, sdeg * dim);
     }
+    if(viewUnits == Unit::FEET_INCHES && fabs(v) > pow(12.0, dim)) {
+        unit = "ft";
+        v /= pow(12.0, dim);
+    }
     int pdeg = (int)ceil(log10(fabs(v) + 1e-10));
     return ssprintf("%.*g%s%s%s", pdeg + UnitDigitsAfterDecimal(), v,
                     compact ? "" : " ", unit.c_str(), DimToString(dim));
@@ -434,10 +460,11 @@ int SolveSpaceUI::GetMaxSegments() {
     return maxSegments;
 }
 int SolveSpaceUI::UnitDigitsAfterDecimal() {
-    return (viewUnits == Unit::INCHES) ? afterDecimalInch : afterDecimalMm;
+    return (viewUnits == Unit::INCHES || viewUnits == Unit::FEET_INCHES) ?
+           afterDecimalInch : afterDecimalMm;
 }
 void SolveSpaceUI::SetUnitDigitsAfterDecimal(int v) {
-    if(viewUnits == Unit::INCHES) {
+    if(viewUnits == Unit::INCHES || viewUnits == Unit::FEET_INCHES) {
         afterDecimalInch = v;
     } else {
         afterDecimalMm = v;
@@ -1036,6 +1063,7 @@ void SolveSpaceUI::Clear() {
     GW.unitsMmMenuItem = NULL;
     GW.unitsMetersMenuItem = NULL;
     GW.unitsInchesMenuItem = NULL;
+    GW.unitsFeetInchesMenuItem = NULL;
     GW.inWorkplaneMenuItem = NULL;
     GW.in3dMenuItem = NULL;
     GW.undoMenuItem = NULL;

src/solvespace.h

@@ -138,7 +138,8 @@ enum class Command : uint32_t;
 enum class Unit : uint32_t {
     MM = 0,
     INCHES,
-    METERS
+    METERS,
+    FEET_INCHES
 };
 
 template<class Key, class T>
@@ -609,7 +610,7 @@ public:
     bool     useSIPrefixes;
     int      autosaveInterval; // in minutes
 
-    std::string MmToString(double v);
+    std::string MmToString(double v, bool editable=false);
     std::string MmToStringSI(double v, int dim = 0);
     std::string DegreeToString(double v);
     double ExprToMm(Expr *e);

src/ui.h

@@ -89,6 +89,7 @@ enum class Command : uint32_t {
     SHOW_TOOLBAR,
     SHOW_TEXT_WND,
     UNITS_INCHES,
+    UNITS_FEET_INCHES,
     UNITS_MM,
     UNITS_METERS,
     FULL_SCREEN,
@@ -546,6 +547,7 @@ public:
     Platform::MenuItemRef unitsMmMenuItem;
     Platform::MenuItemRef unitsMetersMenuItem;
     Platform::MenuItemRef unitsInchesMenuItem;
+    Platform::MenuItemRef unitsFeetInchesMenuItem;
 
     Platform::MenuItemRef inWorkplaneMenuItem;
     Platform::MenuItemRef in3dMenuItem;