public bool RemoveNodes(IEnumerable<Node> nodes)
{
if (nodes == null)
return false;
bool modified = false;
foreach (var node in nodes)
{
if (node == null)
continue;
if (NodeRemoving != null)
{
var eventArgs = new AcceptNodeEventArgs(node);
NodeRemoving(this, eventArgs);
if (eventArgs.Cancel)
continue;
}
if (HasFocus(node))
FocusElement = null;
DisconnectAll(node);
graphNodes.Remove(node);
modified = true;
if (NodeRemoved != null)
NodeRemoved(this, new NodeEventArgs(node));
}
if (modified)
this.Invalidate();
return modified;
}
private void Desktop_NodeRemoving(object sender, AcceptNodeEventArgs e)
{
e.Cancel = TestIfInsideSimulation();
MyNodeView nodeView = e.Node as MyNodeView;
e.Cancel |= nodeView.Node is MyParentInput || nodeView.Node is MyOutput;
}
public void RemoveNode(Node node)
{
if (node == null)
return;
if (NodeRemoving != null)
{
var eventArgs = new AcceptNodeEventArgs(node);
NodeRemoving(this, eventArgs);
if (eventArgs.Cancel)
return;
}
if (HasFocus(node))
FocusElement = null;
DisconnectAll(node);
graphNodes.Remove(node);
this.Invalidate();
if (NodeRemoved != null)
NodeRemoved(this, new NodeEventArgs(node));
}
public bool AddNodes(IEnumerable<Node> nodes)
{
if (nodes == null)
return false;
int index = 0;
bool modified = false;
Node lastNode = null;
foreach (var node in nodes)
{
if (node == null)
continue;
if (graphNodes.Contains(node))
continue;
graphNodes.Insert(index, node); index++;
if (NodeAdded != null)
{
var eventArgs = new AcceptNodeEventArgs(node);
NodeAdded(this, eventArgs);
if (eventArgs.Cancel)
{
graphNodes.Remove(node);
modified = true;
} else
lastNode = node;
} else
lastNode = node;
}
if (lastNode != null)
{
BringElementToFront(lastNode);
FocusElement = lastNode;
this.Invalidate();
}
return modified;
}
public bool AddNode(Node node)
{
if (node == null ||
graphNodes.Contains(node))
return false;
graphNodes.Insert(0, node);
if (NodeAdded != null)
{
var eventArgs = new AcceptNodeEventArgs(node);
NodeAdded(this, eventArgs);
if (eventArgs.Cancel)
{
graphNodes.Remove(node);
return false;
}
}
BringElementToFront(node);
FocusElement = node;
this.Invalidate();
return true;
}
private void Desktop_NodeRemoving(object sender, AcceptNodeEventArgs e)
{
e.Cancel = CanChangeGraph();
// Suppress state saving - connections will get removed which would generate multiple steps.
m_mainForm.SuppressStateSaving = true;
MyNodeView nodeView = e.Node as MyNodeView;
e.Cancel |= nodeView.Node is MyParentInput || nodeView.Node is MyOutput;
}
private void onNodeAdded(object sender, AcceptNodeEventArgs e)
{
List<Node> nodes = (List<Node>)graphCtrl.Nodes;
if (nodes.Count > 0)
m_dirty = true;
graphCtrl.Focus();
}