FReply SFlipbookKeyframeWidget::OnDrop(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent)
{
bool bWasDropHandled = false;
UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get();
if ((Flipbook != nullptr) && Flipbook->IsValidKeyFrameIndex(FrameIndex))
{
TSharedPtr<FDragDropOperation> Operation = DragDropEvent.GetOperation();
if (!Operation.IsValid())
{
}
else if (Operation->IsOfType<FAssetDragDropOp>())
{
const auto& AssetDragDropOp = StaticCastSharedPtr<FAssetDragDropOp>(Operation);
//@TODO: Handle asset inserts
// OnAssetsDropped(*AssetDragDropOp);
// bWasDropHandled = true;
}
else if (Operation->IsOfType<FFlipbookKeyFrameDragDropOp>())
{
const auto& FrameDragDropOp = StaticCastSharedPtr<FFlipbookKeyFrameDragDropOp>(Operation);
FrameDragDropOp->InsertInFlipbook(Flipbook, FrameIndex);
bWasDropHandled = true;
}
}
return bWasDropHandled ? FReply::Handled() : FReply::Unhandled();
}
// Can return null
const FPaperFlipbookKeyFrame* SFlipbookKeyframeWidget::GetKeyFrameData() const
{
UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get();
if ((Flipbook != nullptr) && Flipbook->IsValidKeyFrameIndex(FrameIndex))
{
return &(Flipbook->GetKeyFrameChecked(FrameIndex));
}
return nullptr;
}
FOptionalSize SFlipbookKeyframeWidget::GetFrameWidth() const
{
UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get();
if (Flipbook && Flipbook->IsValidKeyFrameIndex(FrameIndex))
{
const FPaperFlipbookKeyFrame& KeyFrame = Flipbook->GetKeyFrameChecked(FrameIndex);
return FMath::Max<float>(0, KeyFrame.FrameRun * SlateUnitsPerFrame.Get() - FFlipbookUIConstants::HandleWidth);
}
else
{
return 1;
}
}
FReply SFlipbookKeyframeWidget::OnDragDetected(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
if (MouseEvent.IsMouseButtonDown(EKeys::LeftMouseButton))
{
UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get();
if ((Flipbook != nullptr) && Flipbook->IsValidKeyFrameIndex(FrameIndex))
{
TSharedRef<FFlipbookKeyFrameDragDropOp> Operation = FFlipbookKeyFrameDragDropOp::New(
GetFrameWidth().Get(), Flipbook, FrameIndex);
return FReply::Handled().BeginDragDrop(Operation);
}
}
return FReply::Unhandled();
}
FText SFlipbookKeyframeWidget::GetKeyframeTooltip() const
{
UPaperFlipbook* Flipbook = FlipbookBeingEdited.Get();
if ((Flipbook != nullptr) && Flipbook->IsValidKeyFrameIndex(FrameIndex))
{
const FPaperFlipbookKeyFrame& KeyFrame = Flipbook->GetKeyFrameChecked(FrameIndex);
FText SpriteLine = (KeyFrame.Sprite != nullptr) ? FText::FromString(KeyFrame.Sprite->GetName()) : LOCTEXT("NoSprite", "(none)");
return FText::Format(LOCTEXT("KeyFrameTooltip", "Sprite: {0}\nIndex: {1}\nDuration: {2} frame(s)"),
SpriteLine,
FText::AsNumber(FrameIndex),
FText::AsNumber(KeyFrame.FrameRun));
}
else
{
return LOCTEXT("KeyFrameTooltip_Invalid", "Invalid key frame index");
}
}