private bool TryComputePosition(TVertex vertex, out Point position)
{
position = default(Point);
int count = 0;
foreach (TVertex neighbor in Graph.GetNeighbors(vertex))
{
if (VerticesControls.TryGetValue(neighbor, out VertexControl neighborControl))
{
double x = GetX(neighborControl);
double y = GetY(neighborControl);
position.X += double.IsNaN(x) ? 0.0 : x;
position.Y += double.IsNaN(y) ? 0.0 : y;
++count;
}
}
if (count > 0)
{
position.X /= count;
position.Y /= count;
return(true);
}
return(false);
}
private void RemoveGraphControls()
{
foreach (KeyValuePair <TEdge, EdgeControl> pair in EdgesControls.ToArray())
{
bool remove = false;
try
{
remove = !Graph.ContainsEdge(pair.Key.Source, pair.Key.Target) ||
!Graph.ContainsEdge(pair.Key);
}
catch
{
// ignored
}
if (remove)
{
RemoveEdgeControl(pair.Key);
}
}
foreach (KeyValuePair <TVertex, VertexControl> pair in VerticesControls.ToArray())
{
if (!Graph.ContainsVertex(pair.Key))
{
RemoveVertexControl(pair.Key);
}
}
}
private void OnMutableGraphVertexRemoved([NotNull] TVertex vertex)
{
if (VerticesControls.ContainsKey(vertex))
{
_verticesRemoved.Enqueue(vertex);
DoNotificationLayout();
}
}
/// <inheritdoc />
public void SemiHighlightVertex(TVertex vertex, object semiHighlightInfo)
{
_semiHighlightedVertices[vertex] = semiHighlightInfo;
if (VerticesControls.TryGetValue(vertex, out VertexControl control))
{
GraphElementBehaviour.SetIsSemiHighlighted(control, true);
GraphElementBehaviour.SetSemiHighlightInfo(control, semiHighlightInfo);
}
}
/// <inheritdoc />
public void RemoveSemiHighlightFromVertex(TVertex vertex)
{
_semiHighlightedVertices.Remove(vertex);
if (VerticesControls.TryGetValue(vertex, out VertexControl control))
{
GraphElementBehaviour.SetIsSemiHighlighted(control, false);
GraphElementBehaviour.SetSemiHighlightInfo(control, null);
}
}
/// <summary>
/// Removes all vertices and edges from graph.
/// </summary>
protected void RemoveAllGraphElements()
{
foreach (TVertex vertex in VerticesControls.Keys.ToArray())
{
RemoveVertexControl(vertex);
}
foreach (TEdge edge in EdgesControls.Keys.ToArray())
{
RemoveEdgeControl(edge);
}
VerticesControls.Clear();
EdgesControls.Clear();
}
private void CreateGraphControls()
{
// Vertices controls
foreach (TVertex vertex in Graph.Vertices)
{
if (!VerticesControls.ContainsKey(vertex))
{
CreateVertexControl(vertex);
}
}
// Edges controls
foreach (TEdge edge in Graph.Edges)
{
if (!EdgesControls.ContainsKey(edge))
{
CreateEdgeControl(edge);
}
}
}
public VertexControl GetVertexControl([NotNull] TVertex vertex)
{
return(VerticesControls.TryGetValue(vertex, out VertexControl control)
? control
: null);
}
/// <summary>
/// Removes the given <paramref name="vertex"/> from graph.
/// </summary>
/// <param name="vertex">Vertex to remove.</param>
protected virtual void RemoveVertexControl([NotNull] TVertex vertex)
{
RunDestructionTransition(VerticesControls[vertex], false);
VerticesControls.Remove(vertex);
}
