public void DeleteItem(ElemBase elemBase)
{
int toDelete = this.GetTaskIndex(elemBase.Task);
elemBase.Task.BeforeDeletion();
this.FunctionalElements.RemoveAt(toDelete);
this.VisualElements.RemoveAt(toDelete);
}
private bool IsLogicCompatible(ElemBase origin, ElemBase adding)
{
if (origin.GetType() == typeof(ElemEnd))
{
return(false);
}
return(true);
}
private void AddNewTask(ElemBase origin, Type newElem)
{
var res = CurrentSession.AddNewTask(origin, newElem);
if (res != null)
{
SessionViewer.SelectedItem = res;
}
}
private void InsertTaskAfterElement(ElemBase origin, ElemBase adding)
{
adding.Task.VisualElement = adding;
if (origin == null && adding.GetType() == typeof(ElemStart))
{
FunctionalElements.Add(adding.Task);
VisualElements.Add(adding);
return;
}
FunctionalElements.Insert(FunctionalElements.IndexOf(origin.Task) + 1, adding.Task);
VisualElements.Insert(VisualElements.IndexOf(origin) + 1, adding);
}
private bool IsParameterCompatible(ElemBase origin, ElemBase adding)
{
if (adding.Task.InputTypes.Contains(ParameterTypes.Any))
{
return(true);
}
if ((from inp in adding.Task.InputTypes
where origin.Task.OutputType == inp
select inp)
.Any())
{
return(true);
}
return(false);
}
public ElemBase AddNewTask(ElemBase selected, Type elemType)
{
ElemBase newElem = Activator.CreateInstance(elemType, this) as ElemBase;
TryAddEventSubscription(newElem.Task);
if (VisualElements.Count > 0)
{
if (newElem is ElemStart)
{
return(null);
}
if (newElem is ElemEnd && VisualElements.Exists(o => o.GetType() == typeof(ElemEnd)))
{
return(null);
}
if (selected == null)
{
if (TryAddNewElement(VisualElements.Last(), newElem))
{
return(newElem);
}
}
else
{
if (TryAddNewElement(selected, newElem))
{
return(newElem);
}
}
}
else
{
if (newElem is ElemStart)
{
TryAddNewElement(null, newElem);
return(newElem);
}
}
return(null);
}
private bool TryAddNewElement(ElemBase origin, ElemBase adding)
{
if (origin != null && adding.GetType() != typeof(ElemStart))
{
if (!IsParameterCompatible(origin, adding))
{
return(false);
}
if (!IsLogicCompatible(origin, adding))
{
return(false);
}
}
InsertTaskAfterElement(origin, adding);
if (origin != null)
{
origin.NextElementReaction(adding);
}
adding.Task.AfterTaskAddition();
adding.AfterElementAddition();
return(true);
}
