In widget designer, set variable to reference another widget

Development Programming & Scripting UI
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1

I have some customised widgets for various UI components and all are working well.

When attempting to simplify their use and remove as much code/Blueprint involvement for the design team, I am hitting a snag.

My custom widget spawns other widgets into a custom container widget. To do this it needs to be told which container to spawn them into (as this is placed at design time). Now in the class I have defined a UPROPERTY for the target container widget like so:

UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Widget Spawner")
UPanelWidget* targetPanel = nullptr;

When I attempt to set this in the editor to point to the instance of the container widget I wish to use, I click the drop down list box and the possibilities (UPanelWidgets that have been flagged as is variable) are listed. However, when I select ANY of them, the drop down closes and nothing is set!

Have I missed something in my property definition? or is this an editor bug?

2

UE4 does not set those automatically C++ and Blueprint variables cant really abstract to each other, UE4 treats them sepretly. you either need to set this property in blueprint or use meta = (BindWidget) specifier on UPROPERTY which will spawn widget if you making UUserWidget

Note that in C++ you can use Slate directly by making your own UWidget in RebuildWidget function, you might find it easier to use.

3

Thanks for the reply, good to know it’s not possible and I can look at an alternate solution.