On 23/12/2006, at 9:47 AM, Tom Benson wrote:
Woudn't you need to cast it as a MyEditField (rather than a vanilla
Editfield) in order to trigger a custom method..
ie.
if app.LayoutPraticiens.Control(i) isa MyEditField then
MyEditField(app.LayoutPraticiens.Control(i)).raz
If the method is, as seems the case here, a method of MyEditField
then yes and there will be a compiler error to tell you that raz is
not a method of EditField.
The other two possibilities:
1) the method is in EditField and then a polymorphic override exists
with a copy in MyEditField. In that case, despatching via the parent
class will be legal and the normal virtual method resolution will
take place. (In C++ terms, you are casting a pointer to point to the
parent class.)
2) The method 'raz' is an 'extends method' added via a module to
EditField in which case it will be invoked correctly by casting as an
EditField.
Andy
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