public AddRemoveObjectUndoInstance(EditorUndoManager parent, PositionBasedObjectInstance obj, bool created) : base(parent, obj.Room)
{
Created = created;
UndoObject = obj;
Valid = () =>
{
var result = UndoObject != null && ((Created && UndoObject.Room != null) ||
(!Created && Room.ExistsInLevel && Room.LocalArea.Width > UndoObject.SectorPosition.X && Room.LocalArea.Height > UndoObject.SectorPosition.Y));
if (!result)
{
return(result);
}
// Special case for imported geometry: in case user deletes model from geometry list, we should prevent it from reappearing on the map.
if (UndoObject is ImportedGeometryInstance)
{
var geo = UndoObject as ImportedGeometryInstance;
if (!Room.Level.Settings.ImportedGeometries.Contains(geo.Model))
{
return(false);
}
}
return(result);
};
UndoAction = () =>
{
if (Created)
{
EditorActions.DeleteObjectWithoutUpdate(UndoObject);
}
else
{
var backupPos = obj.Position; // Preserve original position and reassign it after placement
EditorActions.PlaceObjectWithoutUpdate(Room, obj.SectorPosition, UndoObject);
EditorActions.MoveObject(UndoObject, backupPos);
}
};
RedoInstance = () =>
{
var result = new AddRemoveObjectUndoInstance(Parent, UndoObject, !Created);
result.Room = Room; // Relink parent room
return(result);
};
}
