Dimension constraints only display mode improvements

Make the `TriStateButton` class "universal" and use it in place of the
`OccludedLinesButton` class which is now removed.

Fix the tool-tips on the constraint button to show what will come instead
of what is - just like the the occluded lines button. Also change the
text of the tool-tips wording to be more clear and consistent with other
buttons.

Small stylistic and code formatting changes.

src/drawconstraint.cpp

@@ -449,7 +449,8 @@ void Constraint::DoArcForAngle(Canvas *canvas, Canvas::hStroke hcs,
 }
 
 bool Constraint::IsVisible() const {
- if(SS.GW.showConstraints == GraphicsWindow::ShowConstraintMode::SCM_NOSHOW ) return false;    
+    if(SS.GW.showConstraints == GraphicsWindow::ShowConstraintMode::SCM_NOSHOW) 
+        return false;
     bool isDim = false;
 
     if(SS.GW.showConstraints == GraphicsWindow::ShowConstraintMode::SCM_SHOW_DIM)
@@ -459,9 +460,7 @@ bool Constraint::IsVisible() const {
         case ConstraintBase::Type::PT_PT_DISTANCE:
         case ConstraintBase::Type::PT_FACE_DISTANCE:
         case ConstraintBase::Type::PT_LINE_DISTANCE:
-        case ConstraintBase::Type::PT_PLANE_DISTANCE:
+        case ConstraintBase::Type::PT_PLANE_DISTANCE: isDim = true; break;
-            isDim = true;
-            break;
         default:;
         }
 

src/graphicswin.cpp

@@ -409,7 +409,7 @@ void GraphicsWindow::Init() {
     showNormals = true;
     showPoints = true;
     showConstruction = true;
-    showConstraints = GraphicsWindow::ShowConstraintMode::SCM_SHOW_ALL;
+    showConstraints = ShowConstraintMode::SCM_SHOW_ALL;
     showShaded = true;
     showEdges = true;
     showMesh = false;

src/solvespace.cpp

@@ -720,9 +720,7 @@ void SolveSpaceUI::MenuFile(Command id) {
             // If the user is exporting something where it would be
             // inappropriate to include the constraints, then warn.
             if(SS.GW.showConstraints != GraphicsWindow::ShowConstraintMode::SCM_NOSHOW &&
-                (dialog->GetFilename().HasExtension("txt") ||
+               (dialog->GetFilename().HasExtension("txt") || fabs(SS.exportOffset) > LENGTH_EPS)) {
-                 fabs(SS.exportOffset) > LENGTH_EPS))
-            {
                 Message(_("Constraints are currently shown, and will be exported "
                           "in the toolpath. This is probably not what you want; "
                           "hide them by clicking the link at the top of the "

src/textwin.cpp

@@ -57,7 +57,7 @@ public:
                                /*outlineColor=*/{});
         }
         if(!*(variable)) {
-            int s = 0, f = 24;
+            int s = 0, f = 23;
             RgbaColor color = { 255, 0, 0, 150 };
             uiCanvas->DrawLine(x+s, y-s, x+f, y-f, color, 2);
             uiCanvas->DrawLine(x+s, y-f, x+f, y-s, color, 2);
@@ -82,33 +82,38 @@ public:
         }
     }
 };
+
 #include <array>
 class TriStateButton : public Button {
 public:
-    TriStateButton(GraphicsWindow::ShowConstraintMode*variable,
+    static const size_t tri = 3;
-                   const std::array<GraphicsWindow::ShowConstraintMode,3> &states,
-                   const std::array<std::string,3> &tooltips,
-                   const std::array<std::string,3> &iconNames  ):variable(variable),states(states),tooltips(tooltips),iconNames(iconNames){}
 
-    GraphicsWindow::ShowConstraintMode* variable;
+    TriStateButton(unsigned *variable, const std::array<unsigned, tri> &states,
-    std::array<GraphicsWindow::ShowConstraintMode,3> states;
+                   const std::array<std::string, tri> &tooltips,
-    std::array<std::string,3> tooltips;
+                   const std::array<std::string, tri> &iconNames)
-    std::array<std::string,3> iconNames;
+        : variable(variable), states(states), tooltips(tooltips), iconNames(iconNames) {
-    std::shared_ptr<Pixmap> icons[3];
+    }
+
+    unsigned *const variable;
+    const std::array<unsigned, tri> states;
+    const std::array<std::string, tri> tooltips;
+    const std::array<std::string, tri> iconNames;
+    std::shared_ptr<Pixmap> icons[tri];
 
     std::string Tooltip() override {
-        for (size_t k = 0; k < 3; ++k )
+        for(size_t k = 0; k < tri; ++k)
-            if ( *variable == states[k] ) return tooltips[k];
+            if(*variable == states[k])
+                return tooltips[k];
         ssassert(false, "Unexpected mode");
     }
 
     void Draw(UiCanvas *uiCanvas, int x, int y, bool asHovered) override {
-        for (size_t k = 0; k < 3;++k)
+        for(size_t k = 0; k < tri; ++k)
             if(icons[k] == nullptr)
                 icons[k] = LoadPng("icons/text-window/" + iconNames[k] + ".png");
 
         std::shared_ptr<Pixmap> icon;
-        for (size_t k = 0; k < 3; ++k )
+        for(size_t k = 0; k < tri; ++k)
             if(*variable == states[k]) {
                 icon = icons[k];
                 break;
@@ -126,80 +131,9 @@ public:
     int AdvanceWidth() override { return 32; }
 
     void Click() override {
-        for (size_t k = 0;k < 3;++k)
+        for(size_t k = 0; k < tri; ++k)
             if(*variable == states[k]) {
-                *variable = states[(k+1)%3];
+                *variable = states[(k + 1) % tri];
-                break;
-            }
-
-        SS.GenerateAll();
-        SS.GW.Invalidate();
-        SS.ScheduleShowTW();
-    }
-};
-
-
-class OccludedLinesButton : public Button {
-public:
-    std::shared_ptr<Pixmap> visibleIcon;
-    std::shared_ptr<Pixmap> stippledIcon;
-    std::shared_ptr<Pixmap> invisibleIcon;
-
-    std::string Tooltip() override {
-        switch(SS.GW.drawOccludedAs) {
-            case GraphicsWindow::DrawOccludedAs::INVISIBLE:
-                return "Stipple occluded lines";
-
-            case GraphicsWindow::DrawOccludedAs::STIPPLED:
-                return "Draw occluded lines";
-
-            case GraphicsWindow::DrawOccludedAs::VISIBLE:
-                return "Don't draw occluded lines";
-
-            default: ssassert(false, "Unexpected mode");
-        }
-    }
-
-    void Draw(UiCanvas *uiCanvas, int x, int y, bool asHovered) override {
-        if(visibleIcon == NULL) {
-            visibleIcon = LoadPng("icons/text-window/occluded-visible.png");
-        }
-        if(stippledIcon == NULL) {
-            stippledIcon = LoadPng("icons/text-window/occluded-stippled.png");
-        }
-        if(invisibleIcon == NULL) {
-            invisibleIcon = LoadPng("icons/text-window/occluded-invisible.png");
-        }
-
-        std::shared_ptr<Pixmap> icon;
-        switch(SS.GW.drawOccludedAs) {
-            case GraphicsWindow::DrawOccludedAs::INVISIBLE: icon = invisibleIcon; break;
-            case GraphicsWindow::DrawOccludedAs::STIPPLED:  icon = stippledIcon;  break;
-            case GraphicsWindow::DrawOccludedAs::VISIBLE:   icon = visibleIcon;   break;
-        }
-
-        uiCanvas->DrawPixmap(icon, x, y - 24);
-        if(asHovered) {
-            uiCanvas->DrawRect(x - 2, x + 26, y + 2, y - 26,
-                               /*fillColor=*/{ 255, 255, 0, 75 },
-                               /*outlineColor=*/{});
-        }
-    }
-
-    int AdvanceWidth() override { return 32; }
-
-    void Click() override {
-        switch(SS.GW.drawOccludedAs) {
-            case GraphicsWindow::DrawOccludedAs::INVISIBLE:
-                SS.GW.drawOccludedAs = GraphicsWindow::DrawOccludedAs::STIPPLED;
-                break;
-
-            case GraphicsWindow::DrawOccludedAs::STIPPLED:
-                SS.GW.drawOccludedAs = GraphicsWindow::DrawOccludedAs::VISIBLE;
-                break;
-
-            case GraphicsWindow::DrawOccludedAs::VISIBLE:
-                SS.GW.drawOccludedAs = GraphicsWindow::DrawOccludedAs::INVISIBLE;
                 break;
             }
 
@@ -219,15 +153,13 @@ static ShowHideButton pointsButton =
     { &(SS.GW.showPoints),       "point",         "points"                          };
 static ShowHideButton constructionButton =
     { &(SS.GW.showConstruction), "construction",  "construction entities"           };
-static TriStateButton constraintsButton =
+static TriStateButton constraintsButton  = {
-    { &(SS.GW.showConstraints),
+    (unsigned *)(&(SS.GW.showConstraints)),
-      {GraphicsWindow::ShowConstraintMode::SCM_SHOW_ALL,
+    {(unsigned)GraphicsWindow::ShowConstraintMode::SCM_SHOW_ALL,
-       GraphicsWindow::ShowConstraintMode::SCM_SHOW_DIM,
+     (unsigned)GraphicsWindow::ShowConstraintMode::SCM_SHOW_DIM,
-       GraphicsWindow::ShowConstraintMode::SCM_NOSHOW},
+     (unsigned)GraphicsWindow::ShowConstraintMode::SCM_NOSHOW},
-      {"constraints and dimensions","dimensions","none"},
+    {"Show only dimensions", "Hide constraints and dimensions", "Show constraints and dimensions"},
-      {"constraint","constraint-dimo","constraint-wo"}
+    {"constraint", "constraint-dimo", "constraint-wo"}};
-    };
-
 static FacesButton facesButton;
 static ShowHideButton shadedButton =
     { &(SS.GW.showShaded),       "shaded",        "shaded view of solid model"      };
@@ -237,7 +169,13 @@ static ShowHideButton outlinesButton =
     { &(SS.GW.showOutlines),     "outlines",      "outline of solid model"          };
 static ShowHideButton meshButton =
     { &(SS.GW.showMesh),         "mesh",          "triangle mesh of solid model"    };
-static OccludedLinesButton occludedLinesButton;
+static TriStateButton occludedLinesButton = {
+    (unsigned *)(&(SS.GW.drawOccludedAs)),
+    {(unsigned)GraphicsWindow::DrawOccludedAs::INVISIBLE,
+     (unsigned)GraphicsWindow::DrawOccludedAs::STIPPLED,
+     (unsigned)GraphicsWindow::DrawOccludedAs::VISIBLE},
+    {"Stipple occluded lines", "Draw occluded lines", "Don't draw occluded lines"},
+    {"occluded-invisible", "occluded-stippled", "occluded-visible"}};
 
 static Button *buttons[] = {
     &workplanesButton,

src/ui.h

@@ -801,14 +801,16 @@ public:
     bool ToolbarMouseDown(int x, int y);
     Command toolbarHovered;
 
-    enum    class ShowConstraintMode{SCM_NOSHOW,SCM_SHOW_ALL,SCM_SHOW_DIM};
 
     // This sets what gets displayed.
     bool    showWorkplanes;
     bool    showNormals;
     bool    showPoints;
     bool    showConstruction;
+
+    enum class ShowConstraintMode : unsigned { SCM_NOSHOW, SCM_SHOW_ALL, SCM_SHOW_DIM };
     ShowConstraintMode showConstraints;
+
     bool    showTextWindow;
     bool    showShaded;
     bool    showEdges;
@@ -819,7 +821,7 @@ public:
     bool    showMesh;
     void ToggleBool(bool *v);
 
-    enum class DrawOccludedAs { INVISIBLE, STIPPLED, VISIBLE };
+    enum class DrawOccludedAs : unsigned { INVISIBLE, STIPPLED, VISIBLE };
     DrawOccludedAs drawOccludedAs;
 
     bool    showSnapGrid;