/// <summary>
/// Gets the offset point for edge parallelization
/// </summary>
/// <param name="source">Source vertex</param>
/// <param name="target">Target vertex</param>
/// <param name="sideDistance">Distance between edges</param>
internal Point GetParallelOffset(VertexControl source, VertexControl target, int sideDistance)
{
var sourcepos = source.GetPosition();
var targetpos = target.GetPosition();
var mainVector = new Vector(targetpos.X - sourcepos.X, targetpos.Y - sourcepos.Y);
//get new point coordinate
var joint = new Point(
sourcepos.X + source.DesiredSize.Width * .5 + sideDistance * (mainVector.Y / mainVector.Length),
sourcepos.Y + source.DesiredSize.Height * .5 - sideDistance * (mainVector.X / mainVector.Length));
return(joint);
}
private Point GetOffset(VertexControl source, VertexControl target, int side_distance)
{
var sourcepos = source.GetPosition();
var targetpos = target.GetPosition();
var main_vector = new Vector(targetpos.X - sourcepos.X, targetpos.Y - sourcepos.Y);
//get new point coordinate
var joint = new Point(
sourcepos.X + side_distance * (main_vector.Y / main_vector.Length),
sourcepos.Y - side_distance * (main_vector.X / main_vector.Length));
return(joint);
}
/// <summary>
/// Gets the offset point for edge parallelization
/// </summary>
/// <param name="source">Source vertex</param>
/// <param name="target">Target vertex</param>
/// <param name="sideDistance">Distance between edges</param>
internal Point GetParallelOffset(VertexControl source, VertexControl target, int sideDistance)
{
var sourcepos = source.GetPosition();
var targetpos = target.GetPosition();
var mainVector = new Vector(targetpos.X - sourcepos.X, targetpos.Y - sourcepos.Y);
//get new point coordinate
var joint = new Point(
sourcepos.X + source.DesiredSize.Width * .5 + sideDistance * (mainVector.Y / mainVector.Length),
sourcepos.Y + source.DesiredSize.Height * .5 - sideDistance * (mainVector.X / mainVector.Length));
return joint;
}
void dg_Area_VertexSelectedForED(object sender, GraphX.Models.VertexSelectedEventArgs args)
{
if (_isInEDMode)
{
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 dedge = new DataEdge(_edVertex.Vertex as DataVertex, _edFakeDV);
_edEdge = new EdgeControl(_edVertex, null, dedge) { ManualDrawing = true };
dg_Area.AddEdge(dedge, _edEdge);
dg_Area.LogicCore.Graph.AddVertex(_edFakeDV);
dg_Area.LogicCore.Graph.AddEdge(dedge);
_edEdge.SetEdgePathManually(_edGeo);
}
else if (_edVertex != args.VertexControl) //finish draw
{
_edEdge.Target = args.VertexControl;
var dedge = _edEdge.Edge as DataEdge;
dedge.Target = args.VertexControl.Vertex as DataVertex;
var fig = _edGeo.Figures[0];
var seg = fig.Segments[_edGeo.Figures[0].Segments.Count - 1] as PolyLineSegment;
if (seg.Points.Count > 0)
{
var targetPos = _edEdge.Target.GetPosition();
var sourcePos = _edEdge.Source.GetPosition();
//get the size of the source
var sourceSize = new Size()
{
Width = _edEdge.Source.ActualWidth,
Height = _edEdge.Source.ActualHeight
};
var targetSize = new Size()
{
Width = _edEdge.Target.ActualWidth,
Height = _edEdge.Target.ActualHeight
};
var src_start = seg.Points.Count == 0 ? fig.StartPoint : seg.Points[0];
var src_end = seg.Points.Count > 1 ? (seg.Points[seg.Points.Count - 1] == targetPos ? seg.Points[seg.Points.Count - 2] : seg.Points[seg.Points.Count - 1]) : fig.StartPoint;
Point p1 = GeometryHelper.GetEdgeEndpoint(sourcePos, new Rect(sourceSize), src_start, _edEdge.Source.MathShape);
Point p2 = GeometryHelper.GetEdgeEndpoint(targetPos, new Rect(targetSize), src_end, _edEdge.Target.MathShape);
fig.StartPoint = p1;
if (seg.Points.Count > 1)
seg.Points[seg.Points.Count - 1] = p2;
}
GeometryHelper.TryFreeze(_edGeo);
_edEdge.SetEdgePathManually(new PathGeometry(_edGeo.Figures));
_isInEDMode = false;
clearEdgeDrawing();
}
}
}
private void CenterOnVertex(VertexControl vc)
{
var x = zoom_control.Position.X + vc.GetPosition().X;
var y = zoom_control.Position.Y + vc.GetPosition().Y;
var of = System.Windows.Media.VisualTreeHelper.GetOffset(vc);
var new_point = new Point(
(of.X
* zoom_control.Scale
+ vc.ActualWidth / 2
* zoom_control.Scale
- zoom_control.ActualWidth / 2
)
,
(of.Y
* zoom_control.Scale
+ vc.ActualHeight / 2
* zoom_control.Scale
- zoom_control.ActualHeight / 2
)
);
zoom_control.ZoomTo(new_point);
}
private void CreateEdgeControl(VertexControl vc)
{
if(_ecFrom == null)
{
_editorManager.CreateVirtualEdge(vc, vc.GetPosition());
_ecFrom = vc;
HighlightBehaviour.SetHighlighted(_ecFrom, true);
return;
}
if(_ecFrom == vc) return;
var data = new DataEdge((DataVertex)_ecFrom.Vertex, (DataVertex)vc.Vertex);
graphArea.LogicCore.Graph.AddEdge(data);
var ec = new EdgeControl(_ecFrom, vc, data);
graphArea.InsertEdge(data, ec);
HighlightBehaviour.SetHighlighted(_ecFrom, false);
_ecFrom = null;
_editorManager.DestroyVirtualEdge();
}