UPaperTileLayer* UPaperTileMap::AddNewLayer(int32 InsertionIndex)
{
// Create the new layer
UPaperTileLayer* NewLayer = NewObject<UPaperTileLayer>(this);
NewLayer->SetFlags(RF_Transactional);
NewLayer->DestructiveAllocateMap(MapWidth, MapHeight);
NewLayer->LayerName = GenerateNewLayerName(this);
// Insert the new layer
if (TileLayers.IsValidIndex(InsertionIndex))
{
TileLayers.Insert(NewLayer, InsertionIndex);
}
else
{
TileLayers.Add(NewLayer);
}
return NewLayer;
}
void STileLayerList::MergeLayerDown()
{
if (UPaperTileMap* TileMap = TileMapPtr.Get())
{
const int32 SourceIndex = GetSelectionIndex();
const int32 TargetIndex = SourceIndex + 1;
if ((SourceIndex != INDEX_NONE) && (TargetIndex != INDEX_NONE))
{
const FScopedTransaction Transaction(LOCTEXT("TileMapMergeLayerDown", "Merge Layer Down"));
TileMap->SetFlags(RF_Transactional);
TileMap->Modify();
UPaperTileLayer* SourceLayer = TileMap->TileLayers[SourceIndex];
UPaperTileLayer* TargetLayer = TileMap->TileLayers[TargetIndex];
TargetLayer->SetFlags(RF_Transactional);
TargetLayer->Modify();
// Copy the non-empty tiles from the source to the target layer
for (int32 Y = 0; Y < SourceLayer->LayerWidth; ++Y)
{
for (int32 X = 0; X < SourceLayer->LayerWidth; ++X)
{
FPaperTileInfo TileInfo = SourceLayer->GetCell(X, Y);
if (TileInfo.IsValid())
{
TargetLayer->SetCell(X, Y, TileInfo);
}
}
}
// Remove the source layer
TileMap->TileLayers.RemoveAt(SourceIndex);
// Update viewers
PostEditNotfications();
}
}
}
UPaperTileLayer* FPaperTileMapDetailsCustomization::AddLayer(bool bCollisionLayer)
{
UPaperTileLayer* NewLayer = NULL;
if (UPaperTileMap* TileMap = TileMapPtr.Get())
{
const FScopedTransaction Transaction( LOCTEXT("TileMapAddLayer", "Add New Layer") );
TileMap->SetFlags(RF_Transactional);
TileMap->Modify();
NewLayer = NewObject<UPaperTileLayer>(TileMap);
NewLayer->SetFlags(RF_Transactional);
NewLayer->LayerWidth = TileMap->MapWidth;
NewLayer->LayerHeight = TileMap->MapHeight;
NewLayer->DestructiveAllocateMap(NewLayer->LayerWidth, NewLayer->LayerHeight);
NewLayer->LayerName = LOCTEXT("DefaultNewLayerName", "New Layer");
NewLayer->bCollisionLayer = bCollisionLayer;
TileMap->TileLayers.Add(NewLayer);
}
return NewLayer;
}