public bool AddItem(Item item, Point location, IHistoryTransaction trans,
CollisionAction collisionAction = CollisionAction.ThrowException)
{
if (!item.IsRoot)
{
throw new InvalidOperationException("Only root items may be added to the field.");
}
Size size = item.GetSize();
var l = mapManager.CurrentLayer;
var itemRect = new Rectangle(location, size);
if (IsOccupied(itemRect))
{
switch (collisionAction)
{
case CollisionAction.ThrowException:
throw new InvalidOperationException("The specified location is already occupied.");
case CollisionAction.Abort:
return(false);
case CollisionAction.Overwrite:
DeleteRect(itemRect, trans);
break;
default:
throw new ArgumentOutOfRangeException(nameof(collisionAction), collisionAction, null);
}
}
if (!IsInWorldBounds(itemRect))
{
switch (collisionAction)
{
case CollisionAction.ThrowException:
throw new InvalidOperationException("The specified location is outside of the world.");
case CollisionAction.Abort:
return(false);
case CollisionAction.Overwrite:
return(false);
default:
throw new ArgumentOutOfRangeException(nameof(collisionAction), collisionAction, null);
}
}
trans?.AddStep(new AddItemStep(item, location, this));
Item tile = l.GetTile(location);
l.SetExtensionTiles(item, location.X, location.Y);
tile.CopyFrom(item);
return(true);
}
public PaintAction(IHistoryService historyService, Item item)
{
this.transaction = historyService.BeginTransaction("Paint");
this.item = item;
this.itemSize = item.GetSize();
}
public void DeleteAll(IHistoryTransaction trans)
{
DeleteRect(WorldTileBounds, trans);
}
public EraseAction(IHistoryService historyService)
{
this.transaction = historyService.BeginTransaction("Eraser");
}
