/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
// Undoing involves re-exchanging the data for each revised edit, then re-calculating.
// The update edit should have been removed already from the map model (see Session.Rollback),
// so the re-calculate call done below will not attempt to re-run this update again.
// Hitting a RollforwardException at this stage would be quite unexpected, indicating a basic
// application logic error, so do not attempt to cover that eventuality.
RevertChanges();
UpdateEditingContext uec = new UpdateEditingContext(this);
uec.Recalculate();
}
/// <summary>
/// Rollback this operation (occurs when a user undoes the last edit).
/// </summary>
internal override void Undo()
{
// Undoing involves re-exchanging the data for each revised edit, then re-calculating.
// The update edit should have been removed already from the map model (see Session.Rollback),
// so the re-calculate call done below will not attempt to re-run this update again.
// Hitting a RollforwardException at this stage would be quite unexpected, indicating a basic
// application logic error, so do not attempt to cover that eventuality.
RevertChanges();
UpdateEditingContext uec = new UpdateEditingContext(this);
uec.Recalculate();
}
/// <summary>
/// Applies a revised edit (as noted on a prior call to <see cref="AddUpdate"/>).
/// </summary>
void ApplyRevision()
{
UpdateOperation uop;
// If we already have an update context, it means we're applying a revision in an attempt
// to fix a rollforward problem.
if (m_CurrentUpdate == null)
{
uop = new UpdateOperation(m_Revisions);
m_CurrentUpdate = new UpdateEditingContext(uop);
}
else
{
// Undo the previous recalculation
m_CurrentUpdate.RevertChanges();
// Include the latest revision
uop = m_CurrentUpdate.UpdateSource;
foreach (RevisedEdit rev in m_Revisions)
{
uop.AddRevisedEdit(rev);
}
}
m_Revisions = null;
try
{
// Serialize the edit to a string BEFORE we apply the changes (otherwise we'll end
// up serializing the modified values)
string editString = uop.GetEditString();
// Apply changes, then rework the map model to account for the update
uop.ApplyChanges();
m_CurrentUpdate.Recalculate();
// Update topology
uop.MapModel.CleanEdit();
// Save the update as part of the working session
uop.Session.SaveEditString(uop, editString);
m_CurrentUpdate = null;
m_NumUpdate++;
}
catch (RollforwardException rex)
{
// Remember the problem edit
m_Problem = rex.Problem;
// The spatial index may be missing stuff (since the recalc exited early)
CadastralMapModel model = uop.MapModel;
model.EnsureFeaturesAreIndexed();
// Update topology and cleanup any junk
model.CleanEdit();
// Re-center on the problem edit if it's off-screen
ISpatialDisplay display = base.ActiveDisplay;
IPosition newCenter = m_Problem.GetRecenter(display.Extent);
if (newCenter != null)
{
display.Center = newCenter;
}
MessageBox.Show("Cannot re-work geometry due to edit " + m_Problem.EditSequence, "Problem",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
catch (Exception ex)
{
MessageBox.Show(ex.StackTrace, ex.Message);
m_CurrentUpdate.RevertChanges();
m_CurrentUpdate = null;
}
}
