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Cant use Dynamic MultiCast Delegate In SWidget? [C++]

i want make Delegate In ScrollBox.cpp

such as DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam( FOnMouseWheeled, const SWidget* );

but this Code bring compile error

DYNAMIC DLELGATE can not used in SWidget?

Product Version: UE 4.16
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asked Jan 03 '18 at 05:05 AM in C++ Programming

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avatar image virtual_nomak Jan 03 '18 at 08:51 AM

Can you show the error log?

avatar image andrea891004 Jan 04 '18 at 01:21 AM

alt text

alt text


syntax error : missing ';' before 'class-head'

missing type specifier - int assumed. Note: C++ does not support default-int

FOnMouseWheeled_DelegateWrapper: identifier not found

declare.png (45.6 kB)
error.png (26.5 kB)
avatar image Shadowriver Jan 04 '18 at 07:32 PM

Hmmm it looks ok to me, but in slate dynamic delegates are not used at all. I only see normal delegates with SLATE_EVENT argument, so you might consider using it

Can you tell what your use case of this and why do you modify engine code insted of trying to make your own widget in less invasive way?

Did you tried rebuilding? it might be issue in intermediate files too

avatar image andrea891004 Jan 12 '18 at 05:07 AM

Um...Use SLATE_EVENT is possible...For now, use this macro....

Thank you!!!

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