/// <summary>
/// A function to conveniently populate the view-model with test data.
/// </summary>
private void PopulateWithTestData()
{
//
// Create a network, the root of the view-model.
//
this.Network = new NetworkViewModel();
//
// Create some nodes and add them to the view-model.
//
var node1 = CreateNode("Test Node1", new Point(100, 60), false, true, true);
var node2 = CreateNode("Test Node2", new Point(350, 80), false, true, true);
//
// Create a connection between the nodes.
//
AConnectionViewModel connection = new StandardConnectionViewModel
{
SourceConnector = node1.OutputConnectors[0],
DestConnector = node2.InputConnectors[0]
};
AConnectionViewModel pathconnection = new PathConnectionViewModel
{
SourceConnector = node1.RightNodeConnection,
DestConnector = node2.LeftNodeConnection
};
//
// Add the connection to the view-model.
//
this.Network.Connections.Add(connection);
this.Network.Connections.Add(pathconnection);
}
/// <summary>
/// Called when the user has started to drag out a connector, thus creating a new connection.
/// </summary>
public AConnectionViewModel ConnectionDragStarted(ConnectorViewModel draggedOutConnector, Point curDragPoint)
{
//
// Create a new connection to add to the view-model.
//
AConnectionViewModel connection;
if (draggedOutConnector.Type == ConnectorType.Path)
{
connection = new PathConnectionViewModel();
}
else
{
connection = new StandardConnectionViewModel();
}
switch (draggedOutConnector.Type)
{
case ConnectorType.Undefined:
break;
case ConnectorType.Input:
{
//
// The user is dragging out a destination connector (an input) and will connect it to a source connector (an output).
//
connection.DestConnector = draggedOutConnector;
connection.SourceConnectorHotspot = curDragPoint;
}
break;
case ConnectorType.Output:
{
//
// The user is dragging out a source connector (an output) and will connect it to a destination connector (an input).
//
connection.SourceConnector = draggedOutConnector;
connection.DestConnectorHotspot = curDragPoint;
}
break;
case ConnectorType.Path:
{
//
// The user is dragging out a path connector.
//
if (draggedOutConnector.Name == NodeViewModel.DefaultLeftNodeConnectorName)
{
connection.DestConnector = draggedOutConnector;
connection.SourceConnectorHotspot = curDragPoint;
}
else
{
connection.SourceConnector = draggedOutConnector;
connection.DestConnectorHotspot = curDragPoint;
}
}
break;
default:
break;
}
//
// Add the new connection to the view-model.
//
this.Network.Connections.Add(connection);
return(connection);
}
