App: add convenience methods to get minimum, maximum and step size of property constraints

src/App/PropertyStandard.cpp

@@ -623,6 +623,29 @@ const PropertyIntegerConstraint::Constraints*  PropertyIntegerConstraint::getCon
     return _ConstStruct;
 }
 
+long PropertyIntegerConstraint::getMinimum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->LowerBound;
+    // return the min of int, not long
+    return std::numeric_limits<int>::min();
+}
+
+long PropertyIntegerConstraint::getMaximum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->UpperBound;
+    // return the max of int, not long
+    return std::numeric_limits<int>::max();
+}
+
+long PropertyIntegerConstraint::getStepSize() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->StepSize;
+    return 1;
+}
+
 void PropertyIntegerConstraint::setPyObject(PyObject *value)
 {
 #if PY_MAJOR_VERSION < 3
@@ -1102,6 +1125,27 @@ const PropertyFloatConstraint::Constraints*  PropertyFloatConstraint::getConstra
     return _ConstStruct;
 }
 
+double PropertyFloatConstraint::getMinimum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->LowerBound;
+    return std::numeric_limits<double>::min();
+}
+
+double PropertyFloatConstraint::getMaximum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->UpperBound;
+    return std::numeric_limits<double>::max();
+}
+
+double PropertyFloatConstraint::getStepSize() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->StepSize;
+    return 1.0;
+}
+
 void PropertyFloatConstraint::setPyObject(PyObject *value)
 {
     if (PyFloat_Check(value)) {