DragAndDropWidget.cpp

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// Copyright (c) 2024 FrostBit Software Lab at the Lapland University of Applied Sciences
//
// This work is licensed under the terms of the MIT license.
// For a copy, see <https://opensource.org/licenses/MIT>.
 
#include "DragAndDropWidget.h"
 
#include "Agrarsense/JSON/SimulatorJsonParser.h"
 
void SDragAndDropWidget::Construct(const FArguments& InArgs)
{
 
}
 
FReply SDragAndDropWidget::OnDragOver(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent)
{
    TSharedPtr<FExternalDragOperation> DragDropOp = DragDropEvent.GetOperationAs<FExternalDragOperation>();
    if (DragDropOp.IsValid() && DragDropOp->HasFiles())
    {
        // For below OnDrop to work, Handled must be returned here.
        return FReply::Handled();
    }
 
    return FReply::Unhandled();
}
 
FReply SDragAndDropWidget::OnDrop(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent)
{
    SCompoundWidget::OnDrop(MyGeometry, DragDropEvent);
 
    TSharedPtr<FExternalDragOperation> DragDropOp = DragDropEvent.GetOperationAs<FExternalDragOperation>();
    if (DragDropOp.IsValid() && DragDropOp->HasFiles())
    {
        const TArray<FString>& Files = DragDropOp->GetFiles();
        for (const FString& File : Files)
        {
#if WITH_EDITOR
            UE_LOG(LogTemp, Log, TEXT("Dropped file to window. Path: %s"), *File);
#endif
 
            if (FPaths::GetExtension(File).Equals(TEXT("json"), ESearchCase::IgnoreCase))
            {
                // Attempt to spawn objects defined in .json file using USimulatorJsonParser
                USimulatorJsonParser::ParseAndOperateJSONFile(File);
            }
        }
 
        return FReply::Handled();
    }
 
    return FReply::Unhandled();
}