public NodeViewModel(Node model, PipelineViewModel parent)
{
fake = new InOutputViewModel(model: null, parent: this);
Model = model;
NodeType = new NodeType {
Type = model.GetType()
};
Parent = parent;
ZIndex = 0;
inputs = Model.Inputs.Select(i => new InOutputViewModel(i, this)).ToList();
Outputs = Model.Outputs.Select(i => new InOutputViewModel(i, this)).ToList();
if (Model.Outputs is INotifyCollectionChanged)
{
((INotifyCollectionChanged)Model.Outputs).CollectionChanged += delegate
{
Outputs = Model.Outputs.Select(i => new InOutputViewModel(i, this)).ToList();
NotifyOfPropertyChange(() => Outputs);
NotifyOfPropertyChange(() => HasOutputs);
Parent.NotifyOfPropertyChange(() => Parent.Edges);
}
}
;
}
/// <summary>
/// Connects the dragged edge to the in-/output, if valid.
/// </summary>
public void InOutputMouseUp(InOutputViewModel inOut)
{
if (DraggedEdge == null)
{
return;
}
DraggedEdge.EndViewModel = inOut;
InOutputViewModel inputVM, outputVM;
if (DraggedEdge.GetInOut(out inputVM, out outputVM))
{
var output = (Node.Output)outputVM.Model;
if (Parent.Model.Graph.CanAddEdge(output.Node, inputVM.Parent.Model))
{
if (inputVM.IsFake)
{
inputVM.Parent.AddInput(output);
}
else
{
((Node.Input)inputVM.Model).Source = output;
}
CullInputs();
NotifyOfPropertyChange(() => Edges);
Parent.SaveSnapshot();
}
}
DraggedEdge = null;
}
/// <summary>
/// Lets the dragged edge snap to the in-/output hovered over.
/// </summary>
public void InOutputMouseMove(InOutputViewModel inOut, RoutedEventArgs e)
{
if (DraggedEdge == null)
{
return;
}
InOutputViewModel inputVM, outputVM;
DraggedEdge.EndViewModel = inOut;
DraggedEdge.Status =
DraggedEdge.GetInOut(out inputVM, out outputVM) && Parent.Model.Graph.CanAddEdge(outputVM.Parent.Model, inputVM.Parent.Model) ?
EdgeStatus.Valid : EdgeStatus.Invalid;
e.Handled = true; // don't bubble up into MouseMove
}
/// <summary>
/// Try and sort two InOutputViewModels into input and output.
/// Returns false if there are two inputs or outputs.
/// </summary>
public bool GetInOut(out InOutputViewModel inputVM, out InOutputViewModel outputVM)
{
if ((StartViewModel.IsFake || StartViewModel.Model is Node.Input) && EndViewModel.Model is Node.Output)
{
inputVM = StartViewModel;
outputVM = EndViewModel;
return(true);
}
if (StartViewModel.Model is Node.Output && (EndViewModel.IsFake || EndViewModel.Model is Node.Input))
{
inputVM = EndViewModel;
outputVM = StartViewModel;
return(true);
}
inputVM = outputVM = null;
return(false);
}
public NodeViewModel(Node model, PipelineViewModel parent)
{
fake = new InOutputViewModel(model: null, parent: this);
Model = model;
NodeType = new NodeType { Type = model.GetType() };
Parent = parent;
ZIndex = 0;
inputs = Model.Inputs.Select(i => new InOutputViewModel(i, this)).ToList();
Outputs = Model.Outputs.Select(i => new InOutputViewModel(i, this)).ToList();
if (Model.Outputs is INotifyCollectionChanged)
((INotifyCollectionChanged)Model.Outputs).CollectionChanged += delegate
{
Outputs = Model.Outputs.Select(i => new InOutputViewModel(i, this)).ToList();
NotifyOfPropertyChange(() => Outputs);
NotifyOfPropertyChange(() => HasOutputs);
Parent.NotifyOfPropertyChange(() => Parent.Edges);
};
}
/// <summary>
/// Starts dragging the connected edge, if any, or a new one.
/// </summary>
public void InOutputMouseDown(InOutputViewModel inOut)
{
/* Only allow this if pipeline is not rendering */
if (!Parent.Model.IsPlaying)
{
InOutputViewModel start = inOut;
// If the input is already connected, drag the existing edge
if (inOut.Model is Node.Input)
{
start = GetOutputViewModel(((Node.Input)inOut.Model).Source) ?? start;
((Node.Input)inOut.Model).Source = null;
NotifyOfPropertyChange(() => Edges);
// remember the end of the grabbed edge
draggedEdgeEndNodeVM = inOut.Parent;
}
DraggedEdge = new EdgeViewModel {
StartViewModel = start, EndViewModel = inOut
};
}
}
/// <summary>
/// Try and sort two InOutputViewModels into input and output.
/// Returns false if there are two inputs or outputs.
/// </summary>
public bool GetInOut(out InOutputViewModel inputVM, out InOutputViewModel outputVM)
{
if ((StartViewModel.IsFake || StartViewModel.Model is Node.Input) && EndViewModel.Model is Node.Output) {
inputVM = StartViewModel;
outputVM = EndViewModel;
return true;
}
if (StartViewModel.Model is Node.Output && (EndViewModel.IsFake || EndViewModel.Model is Node.Input)) {
inputVM = EndViewModel;
outputVM = StartViewModel;
return true;
}
inputVM = outputVM = null;
return false;
}