/// <summary>
/// Performs actions when the operation that uses this observation is marked
/// for deletion as part of its rollback function. This cuts any reference from any
/// previously existing feature that was cross-referenced to the operation (see
/// calls made to <c>AddOp</c>).
/// </summary>
/// <param name="oper">The operation that makes use of this observation.</param>
internal override void OnRollback(Operation oper)
{
Debug.Assert(oper != null);
if (m_Point != null)
{
m_Point.CutOp(oper);
}
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
base.OnRollback();
// Get rid of the observation
m_Direction.OnRollback(this);
// Cut direct refs made by this operation.
if (m_Line != null)
{
m_Line.CutOp(this);
}
if (m_CloseTo != null)
{
m_CloseTo.CutOp(this);
}
// Undo the intersect point and any lines
Rollback(m_Intersection);
Rollback(m_DirLine);
Rollback(m_LineA);
Rollback(m_LineB);
// If we actually did a split, re-activate the original line.
if (m_LineA != null || m_LineB != null)
{
m_LineA = null;
m_LineB = null;
m_Line.Restore();
}
}
/// <summary>
/// Cuts references to an operation that are made by the features this
/// direction refers to.
/// </summary>
/// <param name="op">The operation that should no longer be referred to.</param>
internal override void CutReferences(Operation op)
{
if (m_From != null)
{
m_From.CutOp(op);
}
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
// Delete observed radius.
m_Radius.OnRollback(this);
// Cut direct refs made by this operation.
if (m_Center != null)
{
m_Center.CutOp(this);
}
// Rollback the base class (mark the circle for undo).
base.Undo();
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
base.OnRollback();
// Get rid of the observations.
m_Direction.OnRollback(this);
m_Distance.OnRollback(this);
// Cut direct refs made by this operation.
if (m_From != null)
{
m_From.CutOp(this);
}
// Undo the intersect point and any connecting lines
Rollback(m_To);
Rollback(m_DirLine);
Rollback(m_DistLine);
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
base.OnRollback();
// Cut direct refs made by this operation.
if (m_Line1 != null)
{
m_Line1.CutOp(this);
}
if (m_Line2 != null)
{
m_Line2.CutOp(this);
}
if (m_CloseTo != null)
{
m_CloseTo.CutOp(this);
}
// Undo the intersect point and any lines
Rollback(m_Intersection);
Rollback(m_Line1a);
Rollback(m_Line1b);
Rollback(m_Line2a);
Rollback(m_Line2b);
// If we actually did splits, re-activate the original line.
if (m_Line1a != null || m_Line1b != null)
{
m_Line1a = null;
m_Line1b = null;
m_Line1.Restore();
}
if (m_Line2a != null || m_Line2b != null)
{
m_Line2a = null;
m_Line2b = null;
m_Line2.Restore();
}
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
base.OnRollback();
// Cut references that features make to this operation.
if (m_From != null)
{
m_From.CutOp(this);
}
if (m_To != null)
{
m_To.CutOp(this);
}
// Mark all created features
Feature[] features = this.Features;
foreach (Feature f in features)
{
f.Undo();
}
}
