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)) {

src/App/PropertyStandard.h

@@ -281,6 +281,10 @@ public:
     const Constraints*  getConstraints(void) const;
     //@}
 
+    long getMinimum() const;
+    long getMaximum() const;
+    long getStepSize() const;
+
     virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyIntegerConstraintItem"; }
     virtual void setPyObject(PyObject *);
 
@@ -561,6 +565,10 @@ public:
     const Constraints*  getConstraints(void) const;
     //@}
 
+    double getMinimum() const;
+    double getMaximum() const;
+    double getStepSize() const;
+
     virtual const char* getEditorName(void) const
     { return "Gui::PropertyEditor::PropertyFloatConstraintItem"; }
 

src/App/PropertyUnits.cpp

@@ -181,6 +181,27 @@ const PropertyQuantityConstraint::Constraints*  PropertyQuantityConstraint::getC
     return _ConstStruct;
 }
 
+double PropertyQuantityConstraint::getMinimum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->LowerBound;
+    return std::numeric_limits<double>::min();
+}
+
+double PropertyQuantityConstraint::getMaximum() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->UpperBound;
+    return std::numeric_limits<double>::max();
+}
+
+double PropertyQuantityConstraint::getStepSize() const
+{
+    if (_ConstStruct)
+        return _ConstStruct->StepSize;
+    return 1.0;
+}
+
 void PropertyQuantityConstraint::setPyObject(PyObject *value)
 {
     Base::Quantity quant= createQuantityFromPy(value);

src/App/PropertyUnits.h

@@ -106,6 +106,10 @@ public:
     const Constraints*  getConstraints(void) const;
     //@}
 
+    double getMinimum() const;
+    double getMaximum() const;
+    double getStepSize() const;
+
     virtual const char* getEditorName(void) const;
     virtual void setPyObject(PyObject *);