public void OnSnapPointRequested(SnapPointRequestedEventArgs e)
{
// If there are no restrictions active, don't interfere
if (!activeRestrictions.Any())
{
return;
}
double tolerance = MapConfig.GetProjectedMouseTolerance(_context.Map);
var snapPointChecker = new SnapPointCandidateChecker(new Coordinate(e.PointX, e.PointY), tolerance);
// First try to snap to an intersection of two restrictions (if possible)
bool success = snapPointChecker.ContainsBetterCandidate(c => GetIntersectionBetweenRestrictions(c, tolerance));
// Then try to snap to an intersection of a restriction with layer geometries
if (!success)
{
success = snapPointChecker.ContainsBetterCandidate(c => GetIntersectionsWithLayerFeatures(c, tolerance));
}
// Try a regular snap to the restrictions
if (!success)
{
success = snapPointChecker.ContainsBetterCandidateWithoutTolerance(GetSnapPoints);
}
e.SnappedX = snapPointChecker.BestSnapPoint.X;
e.SnappedY = snapPointChecker.BestSnapPoint.Y;
e.IsFinal = true;
e.IsFound = true;
}
private void OnSnapPointRequested(object sender, SnapPointRequestedEventArgs e)
{
_snapRestrictionService.OnSnapPointRequested(e);
}
