/// <summary>
/// Initializes a new instance of the <see cref="TreeFragment" /> class.
/// </summary>
public TreeFragment()
{
InitializeComponent();
btnAddBranch.Command = new DelegateCommand(() =>
{
if (SelectedItem == null)
{
return;
}
if (Root == null)
{
return;
}
var brc = Root.AddBranch();
CurrentNode = AddNode(null, brc);
});
btnAddChild.Command = new DelegateCommand(() => {
if (CurrentNode == null)
{
return;
}
if (SelectedItem == null)
{
return;
}
var chld = SelectedItem.AddChild();
AddNode(CurrentNode, chld);
});
btnAddFolder.Command = new DelegateCommand(() => {
if (CurrentNode == null)
{
return;
}
if (SelectedItem == null)
{
return;
}
var fld = SelectedItem.AddFolder();
AddNode(CurrentNode, fld);
});
DataContextChanged += (s, e) =>
{
if (e.NewValue is IComposedObject)
{
Root = e.NewValue as IComposedObject;
}
};
}
public MainVM()
{
var bobbyJoe = new Person("Bobby Joe", new[] { new Pet("Fluffy") });
var bob = new Person("Bob", new[] { bobbyJoe });
var littleJoe = new Person("Little Joe");
var joe = new Person("Joe", new[] { littleJoe });
Family = new ReactiveList <TreeItem> {
bob, joe
};
_addPerson = ReactiveCommand.Create();
_addPerson.Subscribe(_ =>
{
if (SelectedItem == null)
{
return;
}
var p = new Person(NewName);
SelectedItem.AddChild(p);
p.IsSelected = true;
p.ExpandPath();
});
_addPet = ReactiveCommand.Create();
_addPet.Subscribe(_ =>
{
if (SelectedItem == null)
{
return;
}
var p = new Pet(PetName);
SelectedItem.AddChild(p);
p.IsSelected = true;
p.ExpandPath();
});
_collapse = ReactiveCommand.Create();
_collapse.Subscribe(_ =>
{
SelectedItem?.CollapsePath();
});
}