private void Target_PositionChanged(object sender, VertexMoveEventArg e)
{
if (!_isSelfLoop)
{
var p1 = GetPosition(Source);
var p2 = GetPosition(Target);
var offset = new Vector(p2.X - p1.X, p2.Y - p1.Y);
offset.Normalize();
offset = offset * Target.Width / 2;
Arrow.X1 = p1.X + offset.X;
Arrow.Y1 = p1.Y + offset.Y;
Arrow.X2 = p2.X - offset.X;
Arrow.Y2 = p2.Y - offset.Y;
if (p1.X < p2.X)
{
Canvas.SetTop(EdgeTag, (p1.Y + p2.Y) / 2);
}
else
{
Canvas.SetTop(EdgeTag, (p1.Y + p2.Y) / 2 - 2 * MarkOffsetY);
}
Canvas.SetLeft(EdgeTag, (p1.X + p2.X) / 2 - MarkOffsetY);
}
}
private void Source_PositionChanged(object sender, VertexMoveEventArg e)
{
if (!_isSelfLoop)
{
var p1 = GetPosition(Source);
var p2 = GetPosition(Target);
var offset = new Vector(p2.X - p1.X, p2.Y - p1.Y);
offset.Normalize();
offset = offset * Source.Width / 2;
Arrow.X1 = p1.X + offset.X;
Arrow.Y1 = p1.Y + offset.Y;
Arrow.X2 = p2.X - offset.X;
Arrow.Y2 = p2.Y - offset.Y;
if (p1.X < p2.X)
{
Canvas.SetTop(EdgeTag, (p1.Y + p2.Y) / 2);
}
else
{
Canvas.SetTop(EdgeTag, (p1.Y + p2.Y) / 2 - 2 * MarkOffsetY);
}
Canvas.SetLeft(EdgeTag, (p1.X + p2.X) / 2 - MarkOffsetY);
}
else
{
Arrow.X1 += e.Offset.X;
Arrow.Y1 += e.Offset.Y;
Arrow.X2 += e.Offset.X;
Arrow.Y2 += e.Offset.Y;
var position = VisualTreeHelper.GetOffset(SelfLoopPath);
Canvas.SetLeft(SelfLoopPath, position.X + e.Offset.X);
Canvas.SetTop(SelfLoopPath, position.Y + e.Offset.Y);
var markPosition = VisualTreeHelper.GetOffset(EdgeTag);
Canvas.SetLeft(EdgeTag, markPosition.X + e.Offset.X);
Canvas.SetTop(EdgeTag, markPosition.Y + e.Offset.Y);
}
}
