public override IStepNode BuildGraph()
{
IStepNode root = base.BuildGraph();
_node.ConnectBranch(_branch, root);
return(root);
}
private void AddNode(IStepNode node, SimpleStepNode simpleNode)
{
if (_rootNode == null)
{
_rootNode = node;
}
else if (_lastSimpleNode != null)
{
_lastSimpleNode.AttachNode(node);
// HAX: attach the node to the top-level decorator so that Previous works correctly
node.AttachTo(_lastNode);
}
_lastNode = node;
_lastSimpleNode = simpleNode;
}
public bool Back()
{
if (_currentNode == null)
{
return(false);
}
IStepNode previousNode = _currentNode.Previous;
if (previousNode == null)
{
return(false);
}
ViewNode(previousNode);
return(true);
}
public void ViewNode(IStepNode node)
{
if (BeforeViewNode != null)
{
ViewNodeEventArgs args = new ViewNodeEventArgs(node, node.Previous != null, node.Next != null);
BeforeViewNode(this, args);
}
IStepNode previousNode = _currentNode;
_currentNode = node;
node.Load();
if (previousNode != null)
{
previousNode.Hide();
}
node.Show();
}
public void AttachNode(IStepNode node)
{
if (node == null)
{
throw new ArgumentNullException("node cannot be null");
}
// Place the new node in-between this node and the current next node
IStepNode oldNext = _next;
node.AttachTo(this);
if (oldNext != null)
{
oldNext.AttachTo(node);
}
// Link the node to us
_next = node;
}
public bool Forward()
{
if (_currentNode == null)
{
return(false);
}
if (!_currentNode.Save())
{
return(true);
}
IStepNode nextNode = _currentNode.Next;
if (nextNode == null)
{
return(false);
}
ViewNode(nextNode);
return(true);
}
public ViewNodeEventArgs(IStepNode nextNode, bool canGoBack, bool canGoForward)
{
NextNode = nextNode;
_canGoBack = canGoBack;
_canGoForward = canGoForward;
}
public void AttachTo(IStepNode node)
{
_previous = node;
}
/// <summary>
/// Connects an IStepNode to one of the IBranchStep's branches.
/// </summary>
/// <param name="branch">The branch to connect to (see the concrete IBranchStep implementation this wraps).</param>
/// <param name="node">The IStepNode that should be jumped to if the branch is selected.</param>
public void ConnectBranch(T branch, IStepNode node)
{
node.AttachTo(this);
_branches[branch] = node;
}
