/// <summary>
/// Adjusts the endpoints of the link so that they are docked with the
/// foreign ports they are connected to.
/// </summary>
/// <remarks>
/// <para>
/// This method iterates through every connection in the link. For each
/// connection, the location of the local port is updated to match
/// the location of the foreign port. If the foreign port has its
/// AttachAtPerimeter flag set to true, then some additional calculations
/// are made in order to move the local port to the perimeter of the
/// foreign port's container.
/// </para>
/// <seealso cref="Syncfusion.Windows.Forms.Diagram.Port.AttachAtPerimeter"/>
/// </remarks>
protected virtual void DockConnections()
{
IPoints shapePts = this.Points;
LinkPort curLocalPort;
Port curForeignPort;
IPortContainer curForeignObj;
int numPoints = 0;
ConnectionCollection perimeterConnections = new ConnectionCollection();
PointF ptStart;
int ptIdx;
PointF ptBoundary;
if (shapePts != null)
{
numPoints = shapePts.PointCount;
foreach (Connection curConnection in this.Connections)
{
curLocalPort = curConnection.GetLocalPort(this) as LinkPort;
curForeignPort = curConnection.GetForeignPort(this);
if (curLocalPort != null && curForeignPort != null)
{
curLocalPort.Location = curForeignPort.Location;
if (curForeignPort.AttachAtPerimeter)
{
perimeterConnections.Add(curConnection);
}
}
}
foreach (Connection curConnection in perimeterConnections)
{
curLocalPort = curConnection.GetLocalPort(this) as LinkPort;
curForeignPort = curConnection.GetForeignPort(this);
if (curLocalPort != null && curForeignPort != null)
{
curForeignObj = curForeignPort.Container;
if (curForeignObj != null)
{
ptIdx = curLocalPort.PointIndex;
if (ptIdx > 0 && ptIdx == numPoints - 1)
{
ptStart = shapePts.GetPoint(ptIdx - 1);
}
else if (ptIdx == 0 && numPoints > 1)
{
ptStart = shapePts.GetPoint(ptIdx + 1);
}
else
{
ptStart = curLocalPort.Location;
}
IGraphics curForeignObjGraphics = curForeignObj as IGraphics;
if (curForeignObjGraphics != null)
{
if (Geometry.GetBoundaryIntercept(curForeignObjGraphics.CreateRegion(0.0f), curLocalPort.Location, ptStart, out ptBoundary))
{
curLocalPort.Location = ptBoundary;
}
}
}
}
}
}
}
