Async Loading Assets from DT to Brushes only last asset is shown

[anonymous_user_5f7aacee]

Hello everyone,

I have some difficulties to understand what is happening here. I have a custom widget called “TextIcon”

This widget is meant to be put in a scroll box. I gather the informations needed to construct this widget from a datatable and then add it as a child to the scrollbox. Here is the script that I have made.

However, this script partially works. Because as you can see below, only the last icon is shown.

I would like to understand why.

Thank you !

[anonymous_user_5f7aacee]

I have changed my manner of doing this, I’ve moved the loading process into c++. It is still a little messy but at least it works. I post my solution here, it may help other people.

I have created a class which derives from UUserWidget.

// Pre-declaration
class UImage;
class UTextBlock;
class UDataTable;

/**
 * 
 */
UCLASS()
class MYPROJECT3_API UImageWidget : public UUserWidget
{
	GENERATED_BODY()

public:
	// This function assumes that the datatable is based on FSubjectDataTableRow structure
	UFUNCTION(BlueprintCallable, Category = "Custom")
	void ConstructFromDataTable(UDataTable * DataTable, FName RowName);

private:
	// The icon
	UPROPERTY(meta = (BindWidget))
	UImage * Icon;

	// The label
	UPROPERTY(meta = (BindWidget))
	UTextBlock * Label;
};

The meta tag “BindWidget” permits to access certain parts of the widget, the names must correspond with the names in the UMG widget.

The data table is created upon a structure that I’ve made in C++. I put it here as well.

#include "CoreMinimal.h"
#include "Engine/DataTable.h"
#include "Engine/Texture.h"
#include "SubjectDataTableRow.generated.h"

/**
 * 
 */
USTRUCT(BlueprintType)
struct FSubjectDataTableRow : public FTableRowBase
{
	GENERATED_BODY()
	
	UPROPERTY(EditAnywhere, BlueprintReadWrite)
	FText Label;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
	TSoftObjectPtr<UTexture> Icon;
};

The source file :

#include "ImageWidget.h"
#include "SubjectDataTableRow.h"
#include "UMG/Public/Components/Image.h"
#include "UMG/Public/Components/TextBlock.h"
#include "Engine/DataTable.h"

void UImageWidget::ConstructFromDataTable(UDataTable * DataTable, FName RowName)
{
	if (DataTable != nullptr)
	{
		FSubjectDataTableRow * Data = DataTable->FindRow<FSubjectDataTableRow>(RowName, "", false);

		if (Data != nullptr)
		{
			Label->SetText(Data->Label);
			
			// Test if the pointer points to something
			if (Data->Icon.IsNull() == false)
			{
				Icon->SetBrushFromTexture(Cast<UTexture2D>(Data->Icon.LoadSynchronous()));
			}
		}
	}
}

Here is the modified blueprint script :

And the final result :

If someone has any advice or criticism let me know, as it would make me progress.

[dendnk]

Hello, thanks for your answer. Your method pushed me to the idea to try async load texture in bp. So I check and its possible, for 4.22 at least.

Define our struct for texture icon in code :

...
	/* Weapon Icon reference */
	UPROPERTY(EditAnywhere, BlueprintReadOnly)
		TSoftObjectPtr<UTexture2D> WeaponIconRef;
...

And in widget on preconstruct event just call AsyncLoadAsset, and cast to Texture2d. And all textures will be loaded.

Hope this would be helpful.