// confirms that it is valid to create a new activity with the given name and parent
private string ValidateCandidateNewInheritance(Inheritance inheritance)
{
ActivityDescriptor childDescriptor = inheritance.ChildDescriptor;
if (childDescriptor == null)
{
return("Child name is required");
}
Activity existingChild = this.ResolveDescriptor(childDescriptor);
if (existingChild != null)
{
return("Child " + existingChild.Name + " already exists");
}
ActivityDescriptor parentDescriptor = inheritance.ParentDescriptor;
if (parentDescriptor == null)
{
return("Parent name is required: try \"Activity\"");
}
Activity parent = this.ResolveDescriptor(parentDescriptor);
if (parent == null)
{
return("Parent " + parentDescriptor.ActivityName + " does not exist");
}
if (parent is ToDo)
{
return("Parent " + parentDescriptor.ActivityName + " is a ToDo which cannot have child activities");
}
return("");
}
public string AddParent(Inheritance inheritance)
{
if (inheritance.ChildDescriptor == null)
{
return("Child name is required");
}
Activity child = this.ResolveDescriptor(inheritance.ChildDescriptor);
if (child == null)
{
return("Child " + inheritance.ChildDescriptor.ActivityName + " does not exist");
}
if (inheritance.ParentDescriptor == null)
{
return("Parent name is required: try \"Activity\"");
}
Activity parent = this.ResolveDescriptor(inheritance.ParentDescriptor);
if (parent == null)
{
return("Parent " + inheritance.ParentDescriptor.ActivityName + " does not exist");
}
Category parentCategory = parent as Category;
if (parentCategory != null)
{
if (child is Problem && child.Parents.Count == 0 && parentCategory != this.problemCategory)
{
// If the first parent added to a Problem is neither a Problem nor this.problemCategory, then add this.problemCategory as a parent
child.AddParent(this.problemCategory);
}
child.AddParent(parentCategory);
}
else
{
Problem parentProblem = parent as Problem;
if (parentProblem != null)
{
child.AddParent(parentProblem);
if (!(child is Problem))
{
this.hasSolution = true;
}
}
else
{
return("Parent " + parent.Name + " is not of type Category or Problem");
}
}
if (this.InheritanceAdded != null)
{
this.InheritanceAdded.Invoke(inheritance);
}
return("");
}
public void AddInheritance(Inheritance inheritance)
{
this.GetActivityOrCreateCategory(inheritance.ChildDescriptor);
this.GetActivityOrCreateCategory(inheritance.ParentDescriptor);
string message = this.AddParent(inheritance);
if (message != "")
{
throw new ArgumentException(message);
}
}
public override void PostInheritance(Inheritance newInheritance)
{
if (this.include(newInheritance.ChildDescriptor))
{
base.PostInheritance(newInheritance);
}
else
{
System.Diagnostics.Debug.WriteLine("Deleting " + newInheritance);
}
}
public string CreateProblem(Inheritance inheritance)
{
string err = this.ValidateCandidateNewInheritance(inheritance);
if (err != "")
{
return(err);
}
Problem problem = this.CreateProblem(inheritance.ChildDescriptor);
return(this.AddParent(inheritance));
}
public string CreateToDo(Inheritance inheritance)
{
string err = this.ValidateCandidateNewInheritance(inheritance);
if (err != "")
{
return(err);
}
ToDo toDo = this.CreateToDo(inheritance.ChildDescriptor);
Activity parent = this.ResolveDescriptor(inheritance.ParentDescriptor);
if (parent == this.todoCategory || parent == this.rootActivity)
{
return(""); // don't have to add the same parent twice
}
return(this.AddParent(inheritance));
}
// returns a string other than "" in case of error
public string CreateCategory(Inheritance inheritance)
{
string err = this.ValidateCandidateNewInheritance(inheritance);
if (err != "")
{
return(err);
}
Activity parent = this.ResolveDescriptor(inheritance.ParentDescriptor);
if (parent == this.todoCategory || parent == this.problemCategory)
{
return("You can't assign an Activity of type Category as a child of the Category named " + parent.Name);
}
ActivityDescriptor childDescriptor = inheritance.ChildDescriptor;
Activity child = this.CreateCategory(inheritance.ChildDescriptor);
return(this.AddParent(inheritance));
}
private void OkButton_Clicked(object sender, EventArgs e)
{
ActivityDescriptor childDescriptor = this.childNameBox.ActivityDescriptor;
ActivityDescriptor parentDescriptor = this.parentNameBox.ActivityDescriptor;
Inheritance inheritance = new Inheritance(parentDescriptor, childDescriptor);
inheritance.DiscoveryDate = DateTime.Now;
string error = this.activityDatabase.AddParent(inheritance);
if (error == "")
{
this.childNameBox.Clear();
this.parentNameBox.Clear();
this.feedbackLayout.setText(childDescriptor.ActivityName + " now inherits from " + parentDescriptor.ActivityName);
}
else
{
this.feedbackLayout.setText(error);
}
}
private void OkButton_Clicked(object sender, EventArgs e)
{
ActivityDescriptor childDescriptor = this.childNameBox.ActivityDescriptor;
ActivityDescriptor parentDescriptor = this.parentNameBox.ActivityDescriptor;
Inheritance inheritance = new Inheritance(parentDescriptor, childDescriptor);
inheritance.DiscoveryDate = DateTime.Now;
string error;
if (this.SelectedActivityTypeIsCategory || this.SelectedActivityTypeIsSolution)
{
error = this.activityDatabase.CreateCategory(inheritance);
}
else
{
if (this.SelectedActivityTypeIsToDo)
{
error = this.activityDatabase.CreateToDo(inheritance);
}
else
{
error = this.activityDatabase.CreateProblem(inheritance);
}
}
if (error == "")
{
this.childNameBox.Clear();
this.parentNameBox.Clear();
this.showMessage("Created " + childDescriptor.ActivityName);
if (this.GoBackAfterCreation)
{
this.layoutStack.GoBack();
}
}
else
{
this.showError(error);
}
}
public override void PostInheritance(Inheritance newInheritance)
{
string text = this.textConverter.ConvertToString(newInheritance);
this.addText(text);
}
public virtual void PostInheritance(Inheritance newInheritance)
{
}
public void AddInheritance(Inheritance newInheritance)
{
this.engine.PutInheritanceInMemory(newInheritance);
this.updatedAfterInheritances = false;
this.PostInheritance(newInheritance);
}