public void contain_value()
{
var writer = XmlWriter.Create(new MemoryStream());
var accept = new AcceptElement(null);
Assert.Throws <AtomSpecificationViolationException>(() => accept.WriteXml(writer));
writer.Close();
}
IElement FindElementAt(PointF location, AcceptElement acceptElement)
{
foreach (var node in graphNodes)
{
var inputConnector = FindInputConnectorAt(node, location);
if (inputConnector != null && acceptElement(inputConnector))
return inputConnector;
var outputConnector = FindOutputConnectorAt(node, location);
if (outputConnector != null && acceptElement(outputConnector))
return outputConnector;
if (node.Bounds.Contains(location))
{
var item = FindNodeItemAt(node, location);
if (item != null && acceptElement(item))
return item;
if (acceptElement(node))
return node;
else
return null;
}
}
var skipConnections = new HashSet<NodeConnection>();
var foundConnections = new List<NodeConnection>();
foreach (var node in graphNodes)
{
foreach (var connection in node.connections)
{
if (skipConnections.Add(connection)) // if we can add it, we haven't checked it yet
{
if (connection.bounds.Contains(location))
foundConnections.Insert(0, connection);
}
}
}
foreach (var connection in foundConnections)
{
if (connection.textBounds.Contains(location) && acceptElement(connection))
return connection;
}
foreach (var connection in foundConnections)
{
using (var region = GraphRenderer.GetConnectionRegion(connection))
{
if (region.IsVisible(location) && acceptElement(connection))
return connection;
}
}
return null;
}
