/// <summary>
/// Event raised then Connections have been removed.
/// </summary>
private void connections_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectionViewModel connection in e.Items)
{
connection.SourceConnector = null;
connection.DestConnector = null;
}
}
/// <summary>
/// Event raised when connections have been removed from the connector.
/// </summary>
private void attachedConnections_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectionViewModel connection in e.Items)
{
connection.ConnectionChanged -= new EventHandler<EventArgs>(connection_ConnectionChanged);
}
if (AttachedConnections.Count == 0)
{
//
// No longer connected to anything, notify the data-binding system that
// 'IsConnected' should be re-evaluated.
//
OnPropertyChanged("IsConnectionAttached");
OnPropertyChanged("IsConnected");
}
}
/// <summary>
/// Debug checking to ensure that no connection is added to the list twice.
/// </summary>
private void attachedConnections_ItemsAdded(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectionViewModel connection in e.Items)
{
connection.ConnectionChanged += new EventHandler<EventArgs>(connection_ConnectionChanged);
}
if ((AttachedConnections.Count - e.Items.Count) == 0)
{
//
// The first connection has been added, notify the data-binding system that
// 'IsConnected' should be re-evaluated.
//
OnPropertyChanged("IsConnectionAttached");
OnPropertyChanged("IsConnected");
}
}
/// <summary>
/// Event raised when connectors are removed from the node.
/// </summary>
private void outputConnectors_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectorViewModel connector in e.Items)
{
connector.ParentNode = null;
connector.Type = ConnectorType.Undefined;
}
}
/// <summary>
/// Event raised when connectors are added to the node.
/// </summary>
private void outputConnectors_ItemsAdded(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectorViewModel connector in e.Items)
{
connector.ParentNode = this;
connector.Type = ConnectorType.Output;
}
}
/// <summary>
/// Event raised when connectors are removed from the node.
/// </summary>
private void connectors_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectorViewModel connector in e.Items)
{
connector.ParentNode = null;
}
}
/// <summary>
/// Event raised when connectors are added to the node.
/// </summary>
private void allConnectors_ItemsAdded(object sender, CollectionItemsChangedEventArgs e)
{
foreach (ConnectorViewModel connector in e.Items)
{
connector.ParentNode = this;
}
}
