How to get widget from Panel Slot?

Development Programming & Scripting Blueprint
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How to get widget from Panel Slot?

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You can *Get Child At *if you know the index. Otherwise, you need to be more specific regarding what you’re trying to do.

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How to Connect

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It won’t work like that. A slot is already a child, kind of. Just use a Canvas Panel -> Get Child.

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The above widget has a *Canvas Panel *which, in turn, has some other widgets nesting in there. You can Get Child At from the *Canvas Panel *(or any panel widget) and then treat this child as a slot - this gives you access to anchors, padding and all the slot goodies.

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How to Connect ，get widget from Panel Slot

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This will not work, I explained above. I do not understand what you’re trying to do but here is what I think you’re trying to do:

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[HR][/HR]
If this does not help - consider using Google Translate if you do not feel confident enough writing in English. Or try asking your question here: 简体中文 (Simplified Chinese) - Unreal Engine Forums. I see some activity on the Answer Hub in your language, too. Last resort - try that

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get the Target Image , warning ， why?

Need Panel slot type, no change

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This cast will always fail, your custom Target Image widget does not inherit from Panel Slot.

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Need Target Image widget from Panel Slot ,how to set

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As far as I know slots do not care what is inside of them. They simply contain layout information of a panel. You can’t access widgets from an UMG slot.

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Я не хочу создавать лишние переменные и поэтому делаю UserWidget наследованием. А чтобы сделать наследованием без лишних элементов требуется функция добавления в корень UserWidget.

PreConstruct: Код генерации интерфейса и добавление это в корень UserWidget.
Переменные родителя

PreConstruct Берем из корня UserWidget интерфейс и вставляем в генерируемый интерфейс.
Переменные родителя
Переменные наследника

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Hi,

unfortunately you can’t do it in blueprint, but you can do it if you use C++.

In Blueprint you can access a slot if you have a reference to a widget added to the canvas. You can see how to do it on the example bellow. In Construct Event I create an Image, which is then added to the canvas. In tick I set a new position to the image inside the canvas.

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In Blueprint you can’t do things in revers - get widget from a slot reference, although in reality under the hood slot remembers which widget it contains.

Bellow you can see example code in C++ .

In MySuperWidget.h

UPROPERTY(EditAnywhere)
class UTexture2D* Icon;

UPROPERTY(meta = (BindWidget))
UCanvasPanel* Canvas;

In MySuperWidget.cpp

/* Create Image, add it to canvas and store reference UCanvasPanelSlot /
UImage image = NewObject(this, UImage::StaticClass());
image->SetBrushFromTexture(Icon);
UCanvasPanelSlot* newSlot = Canvas->AddChildToCanvas(image);

…

/* If you want to access image which you store inside a newSlot /
UImage image = Cast(newSlot->Content);

/* If you want to access canvas inside which newSlot is located /
UCanvasPanel MyCanvas = Cast(newSlot->Parent)

As you can see, you have access to the canvas of the slot via MySlot->Parent and access to a widget stored inside the slot via MySlot->Content.

It is good to know, that these variables are accessed from UPanelSlot class, which is the parent class for all U*Slot.

Hope I helped :smiley:

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