Proper way of using Super and Sub Class events

Arthur_Gabhart · November 10, 2021, 6:47pm

I have a Super class, PTextArea, and a subclass called CREdit. The Super implements the GotFocus event. How do I refer to the subclass in the Super. I am not sure of the terminology and know how to use ISA,
The equation is
If (Missing Name) ISA CREdit then

What is the missing name?

Kem_Tekinay · November 10, 2021, 7:17pm

Create an event GotFocus in your super. (You can right-click on your GotFocus event to help with that). Have it return a Boolean.

In your GotFocus event, include code like this:

var handled as boolean = RaiseEvent GotFocus
if handled then
  return
end if
// ... otherwise, do what you do

In the subclass, implement GotFocus, then return True if you want the Super to stop handling the event, or False to let the Super continue.

Rick_Araujo · November 11, 2021, 11:23pm

In the way I interpreted your question, your answer should be “self”


System.DebugLog "TextClass focus"
If self isA TextClassSub Then 
  System.DebugLog "This class is a TextClassSub"
Else
  System.DebugLog "This class is a TextClass"
End