public void MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (BeginEllips.IsVisible(e.Location))
{
FlagVisible = 1;
}
else if (EndEllips.IsVisible(e.Location))
{
FlagVisible = 2;
}
else if (PathLine.IsOutlineVisible(e.Location, pen))
{
FlagVisible = 3;
}
if (FlagVisible != 0)
{
LastLocation = e.Location;
}
}
else if (e.Button == MouseButtons.Right && PathLine.IsOutlineVisible(e.Location, pen))
{
if (calculate != null)
{
calculate.RemoveVariable(this);
}
if (RemoveEdge != null)
{
RemoveEdge(this);
((Control)sender).Invalidate();
}
}
}
void MoveValueElement(Object sender, Point Delta)
{
BeginPoint = Delta;
BeginEllips.Reset();
BeginEllips.AddEllipse(BeginPoint.X - 10, BeginPoint.Y - 10, 20, 20);
PathLine.Reset();
PathLine.AddLine(BeginPoint, EndPoint);
((Control)sender).Parent.Invalidate();
}
