public SnapMatcher(SnapContext snapCtx)
{
Debug.Assert(snapCtx != null);
m_SnapContext = snapCtx;
}
public GeometryVisitor(SnapContext ctx, GePoint point)
{
m_SnapContext = ctx;
m_ReferencePoint = (GePoint)point.Clone();
}
public GePointVisitor(SnapContext ctx, GePoint point)
: base(ctx, point)
{
}
public static SnapContext InitalizeSnapContextFromPreSelection(GePoint mousePoint)
{
Debug.Assert(mousePoint != null);
SnapContext snapCtx = new SnapContext(PtApp.ActiveDocument.Database);
PtSelectContext sltCtx = new PtSelectContext();
sltCtx.WorldPoint = mousePoint;
SelectionSet tempSet =
PtApp.ActiveView.SelectionMgr.CreateSelectionSet("SnapTemporarySet");
tempSet.Clear();
sltCtx.CurrentSelectionSet = tempSet;
PtApp.ActiveView.Select(sltCtx);
// Set selection set.
SelectionSet PreSet = PtApp.ActiveView.SelectionMgr.GetPreviewSelectionSet();
PreSet.Clear();
if (!tempSet.Empty())
{
foreach (Selection selection in tempSet.Selections)
{
SymbolConstraint instance = selection.GetInstance();
Debug.Assert(instance != null);
SymbolGeometryConstraint constr = instance.GetGeometryConstraint(
mousePoint, snapCtx.SnapTolerance);
if (constr != null)
{
// We just highlight the snapped nodes.
snapCtx.CandidateProxies.Add(constr);
PreSet.AddSelection(selection);
}
}
}
PtApp.ActiveView.UpdateView();
return snapCtx;
}