How to Create a bindable property, like the ones in the UMG (ex: TextBlock)

[Hamo_Dark_Knight (Mohammed)]

How can I create a bindable property as in the TextBlock in UMG or any other class?

I did try to see what’s inside the TextBlock class, and I ended up having this:

using this code only:

public:
    /** The text to display */
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Data", meta = (MultiLine = "true", ExposeOnSpawn = "True"))
    FText Text = FText::FromString("TextBlock");

    /** A bindable delegate to allow logic to drive the text of the widget */
    UPROPERTY()
    FGetText TextDelegate;

protected:
    // Macro implementation for Text property
    PROPERTY_BINDING_IMPLEMENTATION(FText, Text);

but the “GetText” function doesn’t fire, so the value doesn’t change.

but it works when I use it in the Engine’s “Textblock”

tried to implement more code from the Textblock class, and still no change, here is the full code now:
.h file:

// Copyright © 2024 Nova Electron. All rights reserved.
#pragma once

#include "CoreMinimal.h"
#include "CommonUserWidget.h"
#include "W_Text.generated.h"

class UW_CommonTextBlock;
class UW_Background;

UCLASS(Abstract)
class UW_Text : public UCommonUserWidget
{
    GENERATED_BODY()

protected:
    /* Widget Content */
    UPROPERTY(BlueprintReadWrite, meta = (BindWidget), Category = "WBP-Refs")
    TObjectPtr<UW_CommonTextBlock> CommonTextBlock;

    UPROPERTY(BlueprintReadWrite, meta = (BindWidget), Category = "WBP-Refs")
    TObjectPtr<UW_Background> Background;

public:
    /** The text to display */
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Data", meta = (MultiLine = "true", ExposeOnSpawn = "True"))
    FText Text = FText::FromString("TextBlock");

    // This function will update the property from outside the widget
    void SetBindableText(const FText& NewText)
    {
        Text = NewText;

    }

    /** A bindable delegate to allow logic to drive the text of the widget */
    UPROPERTY()
    FGetText TextDelegate;

    virtual TAttribute<FText> GetDisplayText();

    virtual void SynchronizeProperties() override;

    virtual void OnBindingChanged(const FName& Property) override;

protected:

    TSharedPtr<STextBlock> MyTextBlock;

    // Macro implementation for Text property
    PROPERTY_BINDING_IMPLEMENTATION(FText, Text);

};

.cpp file:

// Copyright © 2024 Nova Electron. All rights reserved.
#include "W_Text.h"

void UW_Text::OnBindingChanged(const FName& Property)
{
	Super::OnBindingChanged(Property);

	if (MyTextBlock.IsValid())
	{
		static const FName TextProperty(TEXT("TextDelegate"));

		if (Property == TextProperty)
		{
			TAttribute<FText> TextBinding = GetDisplayText();
			MyTextBlock->SetText(TextBinding);
		}

	}
}

void UW_Text::SynchronizeProperties()
{
	Super::SynchronizeProperties();

	TAttribute<FText> TextBinding = GetDisplayText();

	if (MyTextBlock.IsValid())
	{
		MyTextBlock->SetText(TextBinding);

	}
}

TAttribute<FText> UW_Text::GetDisplayText()
{
	return PROPERTY_BINDING(FText, Text);
}