public override void Do()
{
_Edge = new DataEdge(_source, _target);
_sourceVC = _graph.VertexList.Where(pair => pair.Key.Id == _source.Id).Select(pair => pair.Value).FirstOrDefault();
_targetVC = _graph.VertexList.Where(pair => pair.Key.Id == _target.Id).Select(pair => pair.Value).FirstOrDefault();
if (_sourceVC == null || _targetVC == null)
{
throw new ArgumentNullException("Vertex Control");
}
_eCtrl = new EdgeControl(_sourceVC, _targetVC, _Edge)
{
ShowArrows = true,
ShowLabel = true
};
_graph.Graph.AddEdge(_Edge);
_graph.AddEdge(_Edge, _eCtrl);
if (_callback != null)
{
_callback.Invoke(_eCtrl);
}
}
public override void UnDo()
{
_Edge = new DataEdge(_source, _target);
_sourceVC = _graph.VertexList.Where(pair => pair.Key == _source).Select(pair => pair.Value).FirstOrDefault();
_targetVC = _graph.VertexList.Where(pair => pair.Key == _target).Select(pair => pair.Value).FirstOrDefault();
if (_sourceVC == null || _targetVC == null)
{
throw new ArgumentNullException("VertexControl");
}
_eCtrl = new EdgeControl(_sourceVC, _targetVC, _Edge)
{
ShowArrows = true,
ShowLabel = true
};
_graph.Graph.AddEdge(_Edge);
_graph.AddEdge(_Edge, _eCtrl);
HighlightBehaviour.SetIsHighlightEnabled(_eCtrl, false);
if (_undoCallback != null)
{
_undoCallback.Invoke(_eCtrl);
}
}
//dispose operation, release reference
public virtual void Dispose()
{
_Edge.Dispose();
_Edge = null;
_eCtrl = null;
_callback = null;
_undoCallback = null;
_graph = null;
}
void Area_VertexSelected(object sender, GraphX.Models.VertexSelectedEventArgs args)
{
if (args.MouseArgs.LeftButton == MouseButtonState.Pressed)
{
//if (DragBehaviour.GetIsDragging(args.VertexControl)) return;
SelectVertex(args.VertexControl);
if (IsInEditMode && _status.HasFlag(GraphExplorerStatus.CreateLinkSelectSource))
{
if (_edVertex == null) //select starting vertex
{
_edVertex = args.VertexControl;
_edFakeDV = new DataVertex()
{
ID = -666
};
_edGeo = new PathGeometry(new PathFigureCollection()
{
new PathFigure()
{
IsClosed = false, StartPoint = _edVertex.GetPosition(), Segments = new PathSegmentCollection()
{
new PolyLineSegment(new List <Point>()
{
new Point()
}, true)
}
}
});
var pos = zoomctrl.TranslatePoint(args.VertexControl.GetPosition(), Area);
var lastseg = _edGeo.Figures[0].Segments[_edGeo.Figures[0].Segments.Count - 1] as PolyLineSegment;
lastseg.Points[lastseg.Points.Count - 1] = pos;
var dedge = new DataEdge(_edVertex.Vertex as DataVertex, _edFakeDV);
_edEdge = new EdgeControl(_edVertex, null, dedge)
{
ManualDrawing = true
};
Area.AddEdge(dedge, _edEdge);
Area.Graph.AddVertex(_edFakeDV);
Area.Graph.AddEdge(dedge);
_edEdge.SetEdgePathManually(_edGeo);
_status = GraphExplorerStatus.CreateLinkSelectTarget;
_viewmodel.PostStatusMessage("Select Target Node");
}
else if (_edVertex != args.VertexControl && _status.HasFlag(GraphExplorerStatus.CreateLinkSelectTarget)) //finish draw
{
_viewmodel.CreateEdge((_edVertex.Vertex as DataVertex).Id, (args.VertexControl.Vertex as DataVertex).Id);
ClearEdgeDrawing();
_status = GraphExplorerStatus.Ready;
tbnNewEdge.IsChecked = false;
}
}
}
else if (args.MouseArgs.RightButton == MouseButtonState.Pressed && IsInEditMode)
{
args.VertexControl.ContextMenu = new System.Windows.Controls.ContextMenu();
var miDeleteVertex = new System.Windows.Controls.MenuItem()
{
Header = "Delete", Tag = args.VertexControl
};
miDeleteVertex.Click += miDeleteVertex_Click;
args.VertexControl.ContextMenu.Items.Add(miDeleteVertex);
}
}
public DeleteEdgeOperation(GraphArea graph, DataVertex source, DataVertex target, DataEdge edge, Action <EdgeControl> callback = null, Action <EdgeControl> undoCallback = null)
: base(graph, source, target, callback, undoCallback)
{
_Edge = edge;
base.Sammary = "Delete Edge";
}