UObject* UPaperFlipbookFactory::FactoryCreateNew(UClass* Class, UObject* InParent, FName Name, EObjectFlags Flags, UObject* Context, FFeedbackContext* Warn)
{
UPaperFlipbook* NewFlipbook = ConstructObject<UPaperFlipbook>(Class, InParent, Name, Flags | RF_Transactional);
{
FScopedFlipbookMutator EditLock(NewFlipbook);
EditLock.KeyFrames = KeyFrames;
}
return NewFlipbook;
}
void SFlipbookKeyframeWidget::OnAssetSelected(const FAssetData& AssetData)
{
if (UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get())
{
FScopedFlipbookMutator EditLock(Flipbook);
if (EditLock.KeyFrames.IsValidIndex(FrameIndex))
{
UPaperSprite* NewSprite = Cast<UPaperSprite>(AssetData.GetAsset());
EditLock.KeyFrames[FrameIndex].Sprite = NewSprite;
}
}
}
TSharedRef<FFlipbookKeyFrameDragDropOp> FFlipbookKeyFrameDragDropOp::New(int32 InWidth, UPaperFlipbook* InFlipbook, int32 InFrameIndex)
{
// Create the drag-drop op containing the key
TSharedRef<FFlipbookKeyFrameDragDropOp> Operation = MakeShareable(new FFlipbookKeyFrameDragDropOp);
Operation->KeyFrameData = InFlipbook->GetKeyFrameChecked(InFrameIndex);
Operation->SourceFrameIndex = InFrameIndex;
Operation->SourceFlipbook = InFlipbook;
Operation->WidgetWidth = InWidth;
Operation->Construct();
// Remove the key from the flipbook
{
InFlipbook->Modify();
FScopedFlipbookMutator EditLock(InFlipbook);
EditLock.KeyFrames.RemoveAt(InFrameIndex);
}
return Operation;
}
void SFlipbookTimeline::OnAssetsDropped(const class FAssetDragDropOp& DragDropOp)
{
//@TODO: Support inserting in addition to dropping at the end
TArray<FPaperFlipbookKeyFrame> NewFrames;
for (const FAssetData& AssetData : DragDropOp.AssetData)
{
if (UObject* Object = AssetData.GetAsset())
{
if (UPaperSprite* SpriteAsset = Cast<UPaperSprite>(Object))
{
// Insert this sprite as a keyframe
FPaperFlipbookKeyFrame& NewFrame = *new (NewFrames) FPaperFlipbookKeyFrame();
NewFrame.Sprite = SpriteAsset;
}
else if (UPaperFlipbook* FlipbookAsset = Cast<UPaperFlipbook>(Object))
{
// Insert all of the keyframes from the other flipbook into this one
for (int32 KeyIndex = 0; KeyIndex < FlipbookAsset->GetNumKeyFrames(); ++KeyIndex)
{
const FPaperFlipbookKeyFrame& OtherFlipbookFrame = FlipbookAsset->GetKeyFrameChecked(KeyIndex);
FPaperFlipbookKeyFrame& NewFrame = *new (NewFrames) FPaperFlipbookKeyFrame();
NewFrame = OtherFlipbookFrame;
}
}
}
}
UPaperFlipbook* ThisFlipbook = FlipbookBeingEdited.Get();
if (NewFrames.Num() && (ThisFlipbook != nullptr))
{
const FScopedTransaction Transaction(LOCTEXT("DroppedAssetOntoTimeline", "Insert assets as frames"));
ThisFlipbook->Modify();
FScopedFlipbookMutator EditLock(ThisFlipbook);
EditLock.KeyFrames.Append(NewFrames);
}
}
void FFlipbookKeyFrameDragDropOp::InsertInFlipbook(UPaperFlipbook* DestinationFlipbook, int32 Index)
{
DestinationFlipbook->Modify();
FScopedFlipbookMutator EditLock(DestinationFlipbook);
EditLock.KeyFrames.Insert(KeyFrameData, Index);
}
void FFlipbookKeyFrameDragDropOp::AppendToFlipbook(UPaperFlipbook* DestinationFlipbook)
{
DestinationFlipbook->Modify();
FScopedFlipbookMutator EditLock(DestinationFlipbook);
EditLock.KeyFrames.Add(KeyFrameData);
}
