support to load old project files with PD draft object, restore handling with constraints

src/Mod/PartDesign/App/FeatureDraft.cpp

@@ -59,6 +59,7 @@
 
 #include <Base/Console.h>
 #include <Base/Exception.h>
+#include <Base/Tools.h>
 
 using namespace PartDesign;
 
@@ -66,14 +67,29 @@ using namespace PartDesign;
 PROPERTY_SOURCE(PartDesign::Draft, PartDesign::DressUp)
 
 
+App::PropertyAngle::Constraints Draft::floatAngle = {0.0,89.99,0.1};
+
 Draft::Draft()
 {
     ADD_PROPERTY(Angle,(1.5));
+    Angle.setConstraints(&floatAngle);
     ADD_PROPERTY_TYPE(NeutralPlane,(0),"Draft",(App::PropertyType)(App::Prop_None),"NeutralPlane");
     ADD_PROPERTY_TYPE(PullDirection,(0),"Draft",(App::PropertyType)(App::Prop_None),"PullDirection");
     ADD_PROPERTY(Reversed,(0));
 }
 
+void Draft::handleChangedPropertyType(Base::XMLReader &reader,
+                                      const char * TypeName,
+                                      App::Property * prop)
+{
+    Base::Type inputType = Base::Type::fromName(TypeName);
+    if (prop == &Angle && inputType == App::PropertyFloatConstraint::getClassTypeId()) {
+        App::PropertyFloatConstraint v;
+        v.Restore(reader);
+        Angle.setValue(v.getValue());
+    }
+}
+
 short Draft::mustExecute() const
 {
     if (Placement.isTouched() ||
@@ -103,10 +119,7 @@ App::DocumentObjectExecReturn *Draft::execute(void)
         return new App::DocumentObjectExecReturn("No faces specified");
 
     // Draft angle
-    double angle = Angle.getValue();
-    angle = angle >= 90.0 ? 89.99 : angle < 0.0 ? 0.0 : angle;
-    Angle.setValue(angle);
-    angle = angle / 180.0 * M_PI;
+    double angle = Base::toRadians(Angle.getValue());
 
     // Pull direction
     gp_Dir pullDirection;

src/Mod/PartDesign/App/FeatureDraft.h

@@ -54,6 +54,10 @@ public:
         return "PartDesignGui::ViewProviderDraft";
     }
     //@}
+
+private:
+    virtual void handleChangedPropertyType(Base::XMLReader &reader, const char * TypeName, App::Property * prop);
+    static App::PropertyAngle::Constraints floatAngle;
 };
 
 } //namespace PartDesign