internal void DeleteModelInternal(List<ModelBase> modelsToDelete)
{
if (null == CurrentWorkspace)
return;
//Check for empty group
var annotations = Workspaces.SelectMany(ws => ws.Annotations);
foreach (var annotation in annotations)
{
//record the annotation before the models in it are deleted.
foreach (var model in modelsToDelete)
{
//If there is only one model, then deleting that model should delete the group. In that case, do not record
//the group for modification. Until we have one model in a group, group should be recorded for modification
//otherwise, undo operation cannot get the group back.
if (annotation.SelectedModels.Count() > 1 && annotation.SelectedModels.Where(x => x.GUID == model.GUID).Any())
{
CurrentWorkspace.RecordGroupModelBeforeUngroup(annotation);
}
}
if (annotation.SelectedModels.Any() && !annotation.SelectedModels.Except(modelsToDelete).Any())
{
//Annotation Model has to be serialized first - before the nodes.
//so, store the Annotation model as first object. This will serialize the
//annotation before the nodes are deleted. So, when Undo is pressed,
//annotation model is deserialized correctly.
modelsToDelete.Insert(0, annotation);
}
}
OnDeletionStarted();
CurrentWorkspace.RecordAndDeleteModels(modelsToDelete);
var selection = DynamoSelection.Instance.Selection;
foreach (ModelBase model in modelsToDelete)
{
selection.Remove(model); // Remove from selection set.
model.Dispose();
}
OnDeletionComplete(this, EventArgs.Empty);
}
