Unreal Engine 4.x Scripting with C++ Cookbook - Second Edition

How it works...

To use the UWidget class, our module needs to include the UMG module as one of its dependencies, because UWidget is defined inside the UMG module.

The first class that we need to create, however, is our actual SWidget class.

Because we want to aggregate two widgets together into a compound structure, we create our new widget as a CompoundWidget subclass. CompoundWidget allows you to encapsulate a widget hierarchy as a widget itself.

Inside the class, we use the SLATE_BEGIN_ARGS and SLATE_END_ARGS macros to declare an internal struct called FArguments on our new SWidget. Within SLATE_BEGIN_ARGS and SLATE_END_ARGS, the SLATE_ATTRIBUTE and SLATE_EVENT macros are used. SLATE_ATTRIBUTE creates TAttribute for the type we give it. ...