/// <summary>
/// The user has made changes in the view.
/// </summary>
/// <param name="sender">Sender of event</param>
/// <param name="e">Event arguments</param>
private void OnViewChanged(object sender, GraphChangedEventArgs e)
{
List <ChangeProperty.Property> changes = new List <ChangeProperty.Property>();
changes.Add(new ChangeProperty.Property(model, nameof(model.Arcs), e.Arcs));
changes.Add(new ChangeProperty.Property(model, nameof(model.Nodes), e.Nodes));
// todo - update InitialState as well? This function is currently
// not used a a callback for initial state being changed, but it
// might make sense to update it anyway...
// Check for multiple nodes or arcs with the same name.
IEnumerable <IGrouping <string, StateNode> > duplicateNodes = e.Nodes.GroupBy(n => n.Name).Where(g => g.Count() > 1);
if (duplicateNodes.Any())
{
throw new Exception($"Unable to apply changes - duplicate node name found: {duplicateNodes.First().Key}");
}
IEnumerable <IGrouping <string, RuleAction> > duplicateArcs = e.Arcs.GroupBy(n => n.Name).Where(g => g.Count() > 1);
if (duplicateArcs.Any())
{
throw new Exception($"Unable to apply changes - duplicate arc name found: {duplicateArcs.First().Key}");
}
ChangeProperty command = new ChangeProperty(changes);
presenter.CommandHistory.Add(command);
}
private void DisplayedGraphChanged(object sender, GraphChangedEventArgs args)
{
if (_suspendNotifications)
{
return;
}
var graph = Graph;
Contract.Assert(graph != null);
_suspendNotifications = true;
if (args.OldEdges != null)
{
args.OldEdges.ForEach(e =>
{
var toRemove = _edges.Single(e.Equals);
RemoveEdge(toRemove);
});
}
if (args.OldVertices != null)
{
args.OldVertices.ForEach(e =>
{
var toRemove = _vertices.Single(e.Equals);
RemoveVertex(toRemove);
});
}
if (args.NewVertices != null)
{
args.NewVertices.ForEach(AddVertex);
}
if (args.NewEdges != null)
{
args.NewEdges.ForEach(AddEdge);
}
_suspendNotifications = false;
}
