How to receive OnMouseEnter for a Slate menu item? [Solved]

Development Programming & Scripting C++
1

How to know when the mouse enters/exits a slate menu item created using FMenuBuilder::AddMenuEntry?
I want to do something when them mouse pointer hovers over the menu item and the menu item becomes highlighted.

2

OnMouseEnter() is virtual, you can override on your Slate class.

3

Wow, quick answer!

I need to create my own Widget for that? Because now I’m simply using the AddMenuEntry with FText as argument, this one:

void FBaseMenuBuilder::AddMenuEntry( const TAttribute<FText>& InLabel, const TAttribute<FText>& InToolTip, const FSlateIcon& InIcon, const FUIAction& InAction, FName InExtensionHook, const EUserInterfaceActionType::Type UserInterfaceActionType, FName InTutorialHighlightName )

4

In that case I don’t know if it’s possible, through MenuBuilder, since there you cannot provide your own Widget class.

5

Thank you, I think I will make my own widget for the menu item and put the OnMouseEnter there.

6

This is the code for OnMouseEnter and OnMouseLeve on a menu item, in case somebody need it in the future.
The menu item widget itself is a simplified version of one found in SMenuEntryBlock::BuildMenuEntryWidget, without icon and checkbox.
You don’t need to implement a custom widget, use handlers provided by SWidget.


                    
FText EntryName = ....... ;

TSharedPtr< SWidget > ButtonContent =
SNew(SHorizontalBox)

+ SHorizontalBox::Slot()
.FillWidth(1.0f)
.Padding(FMargin(2, 0, 6, 0))
.VAlign(VAlign_Center)

    SNew(STextBlock)
    .TextStyle(FEditorStyle::Get(), FEditorStyle::Join(StyleName, ".Label"))
    .Text(EntryName)
];

ButtonContent.Get()->SetOnMouseEnter(FNoReplyPointerEventHandler::CreateLambda(
    [EntryName](const FGeometry& G, const FPointerEvent&E) {
        UE_LOG(LogTemp, Log, TEXT("MOUSE ENTER: %s"),*EntryName.ToString());
    }
));

ButtonContent.Get()->SetOnMouseLeave(FSimpleNoReplyPointerEventHandler::CreateLambda(
    [EntryName](const FPointerEvent&E) {
        UE_LOG(LogTemp, Log, TEXT("MOUSE LEAVE: %s"), *EntryName.ToString());
    }
));

MenuBuilder.AddMenuEntry(
    FUIAction(
        FExecuteAction::CreateLambda(]() {
            //Menu item clicked, do something
        })
    ),
    ButtonContent.ToSharedRef()                                
);
3 Likes
7

Oh sure… I totally forgot about the ->SetXXX() functions on Slate widgets lol

8

@scha, thank you so much! Saved me huge amount of time

1 Like