// Change the flagging associated with a leg. If changing to Begin/End flagging, then a bend will be introduced if no bends currently exist
// in the leg. If the leg ends in the finish, the finish symbol may be changed to match if appropriate.
public static void ChangeFlagging(EventDB eventDB, Id<ControlPoint> controlId1, Id<ControlPoint> controlId2, FlaggingKind flagging)
{
ControlPoint control1 = eventDB.GetControl(controlId1);
ControlPoint control2 = eventDB.GetControl(controlId2);
if (control2.kind == ControlPointKind.Finish && flagging == FlaggingKind.All) {
// If the leg ends in the finish control, we can set all flagging by just changing the finish control symbol.
ChangeDescriptionSymbol(eventDB, controlId2, 0, "14.1");
return;
}
// We need a leg object. Create a new one or get the existing one.
Id<Leg> legId = QueryEvent.FindLeg(eventDB, controlId1, controlId2);
Leg leg;
if (legId.IsNone)
leg = new Leg(controlId1, controlId2);
else
leg = (Leg) eventDB.GetLeg(legId).Clone();
// Set the flagging kind.
leg.flagging = flagging;
if (flagging == FlaggingKind.Begin || flagging == FlaggingKind.End) {
// These kinds of flagging require a bend in the flaggingStartStop field.
if (leg.bends != null && leg.bends.Length > 0) {
// Already have a bend we can use.
leg.flagStartStop = (flagging == FlaggingKind.Begin) ? leg.bends[leg.bends.Length - 1] : leg.bends[0];
}
else {
// Create a bend half-way along the leg.
leg.flagStartStop = new PointF((control1.location.X + control2.location.X) / 2, (control1.location.Y + control2.location.Y) / 2);
leg.bends = new PointF[] { leg.flagStartStop };
}
}
// Update the leg object.
if (legId.IsNone)
eventDB.AddLeg(leg);
else {
if (leg.IsVacuous())
eventDB.RemoveLeg(legId);
else
eventDB.ReplaceLeg(legId, leg);
}
// Update the finish control symbol if reasonable.
if (control2.kind == ControlPointKind.Finish) {
// Update the finish control symbol.
if ((flagging == FlaggingKind.None || flagging == FlaggingKind.Begin) && control2.symbolIds[0] == "14.1") {
// Remove the "flagged from last control symbol" and change it to "no flagging".
ChangeDescriptionSymbol(eventDB, controlId2, 0, "14.3");
}
else if (flagging == FlaggingKind.End) {
// If partial flagging on the end part of the leg, change the symbol to finish funnel.
ChangeDescriptionSymbol(eventDB, controlId2, 0, "14.2");
}
}
}
// Change the gaps associated with a leg.
public static void ChangeLegGaps(EventDB eventDB, Id<ControlPoint> controlId1, Id<ControlPoint> controlId2, LegGap[] newGaps)
{
// Get the leg object for this leg. Create one if needed.
Id<Leg> legId = QueryEvent.FindLeg(eventDB, controlId1, controlId2);
Leg leg;
if (legId.IsNone)
leg = new Leg(controlId1, controlId2);
else
leg = (Leg) eventDB.GetLeg(legId).Clone();
// Change the gaps.
leg.gaps = (newGaps == null) ? null : (LegGap[]) newGaps.Clone();
// Write the change leg object to the event DB. If the leg is vacuous, could involve removing the leg.
if (leg.IsVacuous()) {
if (legId.IsNotNone)
eventDB.RemoveLeg(legId);
}
else {
if (legId.IsNone)
eventDB.AddLeg(leg);
else
eventDB.ReplaceLeg(legId, leg);
}
}
// Add a bend to a leg.
public static void AddLegBend(EventDB eventDB, Id<ControlPoint> controlId1, Id<ControlPoint> controlId2, PointF newBend)
{
// Get the leg object for this leg. Create one if needed.
Id<Leg> legId = QueryEvent.FindLeg(eventDB, controlId1, controlId2);
Leg leg;
if (legId.IsNone)
leg = new Leg(controlId1, controlId2);
else
leg = (Leg) eventDB.GetLeg(legId).Clone();
SymPath oldPath = QueryEvent.GetLegPath(eventDB, controlId1, controlId2, legId);
// Get an array with the start/end points and the bends.
PointF[] oldBendArray = new PointF[(leg.bends == null) ? 2 : leg.bends.Length + 2];
if (leg.bends != null)
Array.Copy(leg.bends, 0, oldBendArray, 1, leg.bends.Length);
oldBendArray[0] = eventDB.GetControl(controlId1).location;
oldBendArray[oldBendArray.Length - 1] = eventDB.GetControl(controlId2).location;
// Insert the new point into the array at the right place.
PointF[] newBendArray = Util.AddPointToArray(oldBendArray, newBend);
// Copy the new bend parts into the bends array.
leg.bends = new PointF[newBendArray.Length - 2];
Array.Copy(newBendArray, 1, leg.bends, 0, newBendArray.Length - 2);
// Update the leg.
if (legId.IsNone)
eventDB.AddLeg(leg);
else
eventDB.ReplaceLeg(legId, leg);
// If the leg had gaps, update the gaps for the new path.
if (leg.gaps != null) {
SymPath newPath = QueryEvent.GetLegPath(eventDB, controlId1, controlId2);
LegGap[] newGaps = LegGap.MoveGapsToNewPath(leg.gaps, oldPath, newPath);
ChangeLegGaps(eventDB, controlId1, controlId2, newGaps);
}
}