/// <summary>
/// Creates a node
/// </summary>
/// <param name="shape"></param>
/// <returns></returns>
object IObservableGraphSource.CreateNode(IShape shape)
{
IsDirty = true;
if (shape is BaseNodeShape)
{
var baseNodeShape = shape as BaseNodeShape;
var def = NodeDefinitions.FirstOrDefault(x => x.Name == baseNodeShape.Name);
var nodeConfig = new Configuration.NodeConfiguration
{
Id = Guid.NewGuid(),
ClassName = def.Name,
NodeType = def is ActionNodeDefinition ? "ActionNode" : "EventNode"
};
this.flowConfiguration.Nodes.Add(nodeConfig);
NodeViewModel nodeViewModel = null;
if (def is ActionNodeDefinition)
{
nodeViewModel = new ActionNodeViewModel(def, nodeConfig);
baseNodeShape.DataContext = nodeViewModel;
}
else if (def is EventNodeDefinition)
{
nodeViewModel = new EventNodeViewModel(def, nodeConfig);
baseNodeShape.DataContext = nodeViewModel;
}
baseNodeShape.CreateConnectors();
baseNodeShape.Height = nodeViewModel.Height;
baseNodeShape.Width = nodeViewModel.Width;
return(nodeViewModel);
}
return(null);
}
/// <summary>
/// Fills the configuration values
/// </summary>
private void FillConfiguration()
{
if (!flowConfiguration.Nodes.Any())
{
return;
}
// create node view models
foreach (var node in flowConfiguration.Nodes)
{
NodeViewModel nodeViewModel = null;
var nodeDefinition = NodeDefinitions.Where(x => x.Name == node.ClassName).FirstOrDefault();
if (node.NodeType == "ActionNode")
{
nodeViewModel = new ActionNodeViewModel(nodeDefinition, node);
}
else if (node.NodeType == "EventNode")
{
nodeViewModel = new EventNodeViewModel(nodeDefinition, node);
}
Nodes.Add(nodeViewModel);
}
// create flow links
foreach (var flow in flowConfiguration.Links)
{
var sourceNodeViewModel = Nodes.Where(x => x.Id == flow.From.NodeId).FirstOrDefault();
var sourceConnectorViewModel = sourceNodeViewModel.FlowPins.Where(x => x.Name == flow.From.PinName).FirstOrDefault();
var targetNodeViewModel = Nodes.Where(x => x.Id == flow.To.NodeId).FirstOrDefault();
var targetConnectorViewModel = targetNodeViewModel.FlowPins.Where(x => x.Name == flow.To.PinName).FirstOrDefault();
var connectionViewModel = new NodeConnectionViewModel(sourceNodeViewModel, targetNodeViewModel, sourceConnectorViewModel, targetConnectorViewModel);
Connections.Add(connectionViewModel);
}
// create data pins
foreach (var pin in flowConfiguration.Pins)
{
var sourceNodeViewModel = Nodes.Where(x => x.Id == pin.From.NodeId).FirstOrDefault();
var sourceConnectorViewModel = sourceNodeViewModel.DataPins.Where(x => x.Name == pin.From.PinName).FirstOrDefault();
var targetNodeViewModel = Nodes.Where(x => x.Id == pin.To.NodeId).FirstOrDefault();
var targetConnectorViewModel = targetNodeViewModel.DataPins.Where(x => x.Name == pin.To.PinName).FirstOrDefault();
var connectionViewModel = new NodeConnectionViewModel(sourceNodeViewModel, targetNodeViewModel, sourceConnectorViewModel, targetConnectorViewModel);
Connections.Add(connectionViewModel);
// if the target connector is a generic data type, update all other generic types to the source data type
if (targetConnectorViewModel.IsGeneric)
{
(targetNodeViewModel as ActionNodeViewModel).UpdateDataTypes(sourceConnectorViewModel.DataConnectorType);
}
}
// create workflow variables
foreach (var variable in flowConfiguration.Variables)
{
Variables.Add(new FlowVariable
{
Name = variable.Name,
Value = variable.Value,
Type = variable.Type
});
}
}