//read command name and based on that do execute command with special conditions
private void executeCommand(Command c, string choice)
{
DataVertex dv = new DataVertex();
DataEdge de = new DataEdge();
VertexControl vc;
VertexControl vc2;
if (choice == "undo")
{
graphViewModel.graphState = GraphViewModel.GraphState.UNDO;
}
else
{
graphViewModel.graphState = GraphViewModel.GraphState.REDO;
}
switch (c.Name)
{
case "AddVertex":
dv = c.Operands as DataVertex;
int id = int.Parse(dv.Element_id);
while (_mn.GlobalVertices.ContainsKey(dv.Element_id))
{
id++;
dv.Element_id = id.ToString();
}
graphViewModel.CreateDataVertexBase(dv.typeOfVertex, dv.Element_id);
vc = graphViewModel.GetVertexControlWithDataVertex(dv.Element_id);
vc.SetPosition(c.Position);
break;
case "DeleteVertex":
dv = c.Operands as DataVertex;
vc = graphViewModel.GetVertexControlWithDataVertex(dv.Element_id);
if (vc == null)
{
break;
}
Point p = new Point();
p.X = vc.GetPosition().X;
p.Y = vc.GetPosition().Y;
graphViewModel.DeleteVertex(dv);
c.Position = p;
break;
case "AddEdge":
de = c.Operands as DataEdge;
if (de == null)
{
graphViewModel.graphState = GraphViewModel.GraphState.NORMAL;
return;
}
vc = graphViewModel.GetVertexControlWithDataVertex(de.Source.Element_id);
vc2 = graphViewModel.GetVertexControlWithDataVertex(de.Target.Element_id);
if (vc == null)
{
vc = new VertexControl(de.Source);
}
EdgeControl ec = new EdgeControl(vc, vc2, de);
graphViewModel.AddEdge(de, ec, vc);
break;
case "DeleteEdge":
de = c.Operands as DataEdge;
if (c.IsActive == false)
{
return;
}
graphViewModel.DeleteConnection(de.Source, de.Target.Element_id);
break;
}
graphViewModel.graphState = GraphViewModel.GraphState.NORMAL;
}