private void NodeSocketConnectEventHandler(object sender, NodeSocketConnectionEventArgs args)
{
NodeViewConnection con = new NodeViewConnection
{
Source = args.Source,
Sink = args.Sink,
};
_connections.Add(con);
QueueDraw();
}
private void DrawSocketConnection(Cairo.Context cr, NodeViewConnection c)
{
Cairo.LinearGradient pat;
RGBA colSrc, colSink;
Rectangle allocation;
Rectangle allocParent;
int x0, x1, y0, y1;
allocParent = c.Source.Parent.Allocation;
allocation = c.Source.Allocation;
x0 = allocation.X + allocation.Width / 2 + allocParent.X;
y0 = allocation.Y + allocation.Height / 2 + allocParent.Y;
allocParent = c.Sink.Parent.Allocation;
allocation = c.Sink.Allocation;
x1 = allocation.X + allocation.Width / 2 + allocParent.X;
y1 = allocation.Y + allocation.Height / 2 + allocParent.Y;
pat = new Cairo.LinearGradient(x0, y0, x1, y1);
colSrc = c.Source.RGBA;
colSink = c.Sink.RGBA;
pat.AddColorStop
(
0,
new Cairo.Color(colSrc.Red, colSrc.Green, colSrc.Blue, colSrc.Alpha)
);
pat.AddColorStop
(
1,
new Cairo.Color(colSink.Red, colSink.Green, colSink.Blue, colSink.Alpha)
);
cr.Save();
NodeConnectingCurve(cr, x0, y0, x1, y1);
cr.SetSource(pat);
cr.Stroke();
pat.Dispose();
cr.Restore();
}