private void ActivateNode(Node_ViewModel node)
{
ActiveNode = node;
ActiveNodeRelationships = new RelationView_ViewModel {
SourceNode = node, SelectedEndNode = null
};
}
public Browser_ViewModel()
{
if (IsInDesignMode)
{
NodeId = 50;
ActiveNode = new Node_ViewModel();
ActiveNodeRelationships = new RelationView_ViewModel();
}
else
{
_db = new GraphDatabase("http://localhost:7474").Authenticate("neo4j", "foobarbaz");
}
LoadNodeWithIdCommand = new RelayCommand(LoadNodeWithId, LoadNodeWithIdEnabled);
IncrementNodeIdCommand = new RelayCommand(IncrementNodeId, IncrementNodeIdEnabled);
DecrementNodeIdCommand = new RelayCommand(DecrementNodeId, DecrementNodeIdEnabled);
ActivateNodeCommand = new RelayCommand <Node_ViewModel>(ActivateNode, ActivateNodeEnabled);
}
private async void LoadNodeWithId()
{
int tries = 10;
bool itFailed = true;
while (itFailed && tries-- > 0)
{
itFailed = false;
try
{
var node = await _db.GetNodeWithId(NodeId);
var nodeVm = new Node_ViewModel(node);
ActivateNode(nodeVm);
}
catch (GraphDatabaseException)
{
NodeId++;
itFailed = true;
}
}
}
private async void SetStartNode()
{
_startNode = new Node_ViewModel(await _rel.GetStartNode());
RaisePropertyChanged("StartNode");
}
private async void SetEndNode()
{
_endNode = new Node_ViewModel(await _rel.GetEndNode());
RaisePropertyChanged("EndNode");
}
private bool ActivateNodeEnabled(Node_ViewModel node)
{
return(node != null);
}
public RelationView_ViewModel()
{
SelectedEndNode = new Node_ViewModel();
SourceNode = new Node_ViewModel();
SelectedRelationship = new Relationship_ViewModel("alpha");
}