private void chooseRouteOutlinePoints(Link orgnLink, Link destLink,
ref PointF ptOrg, ref PointF ptDest)
{
RoutingOptions rop = flowChart.RoutingOptions;
Node origin = orgnLink.getNode();
Node destination = destLink.getNode();
bool reflexive = orgnLink.sameNode(destLink);
// how many points to consider ?
int srcCount = rop.StartOrientation == Orientation.Auto ? 4 : 2;
int dstCount = rop.EndOrientation == Orientation.Auto ? 4 : 2;
PointF[] srcPoints = new PointF[srcCount];
PointF[] dstPoints = new PointF[dstCount];
// determine the coordinates of the points to be checked ...
int srcIdx = 0, dstIdx = 0;
// source points
if (rop.StartOrientation != Orientation.Vertical)
{
srcPoints[srcIdx++] = orgnLink.getIntersection(ptOrg,
new PointF(ptOrg.X - 2*origin.BoundingRect.Width, ptOrg.Y));
srcPoints[srcIdx++] = orgnLink.getIntersection(ptOrg,
new PointF(ptOrg.X + 2*origin.BoundingRect.Width, ptOrg.Y));
}
if (rop.StartOrientation != Orientation.Horizontal)
{
srcPoints[srcIdx++] = orgnLink.getIntersection(ptOrg,
new PointF(ptOrg.X, ptOrg.Y - 2*origin.BoundingRect.Height));
srcPoints[srcIdx++] = orgnLink.getIntersection(ptOrg,
new PointF(ptOrg.X, ptOrg.Y + 2*origin.BoundingRect.Height));
}
// destination points
if (rop.EndOrientation != Orientation.Vertical)
{
dstPoints[dstIdx++] = dstPoints[1] = destLink.getIntersection(ptDest,
new PointF(ptDest.X - 2*destination.BoundingRect.Width, ptDest.Y));
dstPoints[dstIdx++] = destLink.getIntersection(ptDest,
new PointF(ptDest.X + 2*destination.BoundingRect.Width, ptDest.Y));
}
if (rop.EndOrientation != Orientation.Horizontal)
{
dstPoints[dstIdx++] = destLink.getIntersection(ptDest,
new PointF(ptDest.X, ptDest.Y - 2*destination.BoundingRect.Height));
dstPoints[dstIdx++] = destLink.getIntersection(ptDest,
new PointF(ptDest.X, ptDest.Y + 2*destination.BoundingRect.Height));
}
// check which of these points are closest
ptOrg = srcPoints[0];
ptDest = dstPoints[0];
float minDist = Single.MaxValue;
for (int sidx = 0; sidx < srcCount; ++sidx)
{
if (!reflexive && destination.containsPoint(srcPoints[sidx]))
continue;
for (int didx = 0; didx < dstCount; ++didx)
{
if (!reflexive && origin.containsPoint(dstPoints[didx]))
continue;
float dist = Utilities.Distance(
srcPoints[sidx], dstPoints[didx]);
if (dist < 2 * rop.GridSize)
continue;
// we prefer these to be on the same side
if (sidx != didx) dist *= 3;
if (dist < minDist)
{
minDist = dist;
ptOrg = srcPoints[sidx];
ptDest = dstPoints[didx];
}
}
}
}
private void setEndPoints(Link orgnLink, Link destLink, PointF end)
{
reflexive = destLink.sameNode(orgnLink);
// align the end points of the arrow to the outlines of the connected nodes
if (orgnLink.calcIntrs())
ptOrg = points[0] = orgnLink.getInitialPt();
if (destLink.calcIntrs())
ptEnd = destLink.getInitialPt();
else
ptEnd = end;
if (!orgnLink.objsIntersect(destLink) && !reflexive)
{
if (orgnLink.calcIntrs())
ptOrg = points[0] = orgnLink.getIntersection(ptOrg, ptEnd);
if (destLink.calcIntrs())
ptEnd = destLink.getIntersection(ptEnd, ptOrg);
}
else
{
// if the arrow will be routed, choose the closest points on the
// horizontal line intersections with the node outlines. These points
// should not be contained within a node
if (autoRoute && !dynamic && orgnAnchor == -1 && destAnchor == -1)
{
chooseRouteOutlinePoints(orgnLink, destLink, ref ptOrg, ref ptEnd);
points[0] = ptOrg;
}
}
}
internal void setOrgAndDest(Link orgLink, Link trgLink)
{
orgnLink = orgLink;
destLink = trgLink;
// place the end points of the arrow at their respective object edge
points[0] = orgnLink.getInitialPt();
points[points.Count-1] = destLink.getInitialPt();
if (!orgnLink.objsIntersect(destLink))
{
points[0] = orgnLink.getIntersection(points[0], points[points.Count-1]);
points[points.Count-1] = destLink.getIntersection(points[points.Count-1], points[0]);
}
points[0] = orgnLink.getAnchor(points[0], this, false, ref orgnAnchor);
points[points.Count-1] = destLink.getAnchor(points[points.Count-1], this, true, ref destAnchor);
// set reflexive arrow position & form
reflexive = orgnLink.sameNode(destLink);
if (reflexive)
{
setReflexive();
}
else
{
// compute the arrow points
updatePoints(points[points.Count-1]);
if (dynamic)
updatePosFromOrgAndDest(true);
}
rectFromPoints();
// relative position to nodes
orgnLink.saveEndRelative();
destLink.saveEndRelative();
doRoute();
}