/// <summary>
/// update the contents of the tree bar and anything else that should change when,
/// for example, the filter or sort order changes.
/// </summary>
protected void OnListChanged(object src, ListChangedEventArgs arguments)
{
if (IsControllingTheRecordTreeBar) // m_treeBarHandler!= null)
{
if (arguments.Actions == ListChangedEventArgs.ListChangedActions.UpdateListItemName)
{
// ******************************************************************************
// In the case where there are no other items and the Current object isn't valid,
// then just don't do anything. LT-5849.
// A more robust solution would be to have in our design a way to produce
// a 'defered' prop changed so that the current actions can finish before
// others are notified of the change (which is often incomplete at that time).
// The stack for this issue showed the RecordList and RecordClerk being
// re-entered while they were deleting an object in a previous stack frame.
// This is not the only case where this has been noted, but a solution has
// not yet been thought of.
// In the meantime, this fixed the crash .. <sigh> but doesn't help at all
// for the other cases where this can happen.
// ******************************************************************************
if (m_recordBarHandler is TreeBarHandler && m_list.CurrentObject != null &&
(m_list.CurrentObject.Cache != null || m_list.SortedObjects.Count != 1))
{
// all we need to do is replace the currently selected item in the tree.
var hvoItem = arguments.ItemHvo;
ICmObject obj = null;
if (hvoItem != 0)
Cache.ServiceLocator.GetInstance<ICmObjectRepository>().TryGetObject(hvoItem, out obj);
if (obj == null)
obj = m_list.CurrentObject;
m_recordBarHandler.ReloadItem(obj);
}
}
else
{
m_recordBarHandler.PopulateRecordBar(m_list);
}
}
if (arguments.Actions == ListChangedEventArgs.ListChangedActions.SkipRecordNavigation ||
arguments.Actions == ListChangedEventArgs.ListChangedActions.UpdateListItemName)
{
SelectedRecordChanged(true, false);
}
else if (arguments.Actions == ListChangedEventArgs.ListChangedActions.SuppressSaveOnChangeRecord)
{
bool oldSuppressSaveChangeOnRecord = SuppressSaveOnChangeRecord;
SuppressSaveOnChangeRecord = true;
try
{
BroadcastChange(false);
}
finally
{
SuppressSaveOnChangeRecord = oldSuppressSaveChangeOnRecord;
}
}
else if (arguments.Actions == ListChangedEventArgs.ListChangedActions.Normal)
{
BroadcastChange(false);
}
else
{
throw new NotImplementedException("An enum choice for ListChangedEventArgs was selected that OnListChanged is not aware of.");
}
}
protected void SendPropChangedOnListChange(int newCurrentIndex, ArrayList newSortedObjects, ListChangedEventArgs.ListChangedActions actions)
{
//Populate the virtual cache property which will hold this set of hvos, in this order.
int[] hvos = new int[newSortedObjects.Count];
int i = 0;
foreach(ManyOnePathSortItem item in newSortedObjects)
hvos[i++] = item.RootObject.Hvo;
// In case we're already displaying it, we must have an accurate old length, or if it gets shorter
// the extra ones won't get deleted. But we must check whether the property is already cached...
// if it isn't and we try to read it, the code will try to load this fake property from the database,
// with unfortunate results. (It's not exactly a reference sequence, but any sequence type will do here.)
int rootHvo = m_owningObject.Hvo;
int oldLength = 0;
if (m_cache.MainCacheAccessor.get_IsPropInCache(rootHvo, m_virtualFlid,
(int)CellarModuleDefns.kcptReferenceSequence, 0))
{
oldLength = m_cache.MainCacheAccessor.get_VecSize(rootHvo, m_virtualFlid);
}
else
{
// on a general refresh operation all the caches get cleared before anything else
// happens. So, use the old length that we stored earlier (cf. LT-2075).
oldLength = m_oldLength;
}
if (AboutToReload != null)
AboutToReload(this, new EventArgs());
// Must not actually change anything before we do AboutToReload! Then do it all at once
// before we make any notifications...we want the cache value to always be consistent
// with m_sortedObjects, and m_currentIndex always in range
SortedObjects = newSortedObjects;
// if we haven't already set an index, see if we can restore one from the property table.
if (SortedObjects.Count > 0 && (newCurrentIndex == -1 || m_hvoCurrent == 0))
newCurrentIndex = m_mediator.PropertyTable.GetIntProperty(Clerk.PersistedIndexProperty, 0, PropertyTable.SettingsGroup.LocalSettings);
// Ensure the index is in bounds. See LT-10349.
if (SortedObjects.Count > 0)
{
// The stored value may be past the end of the current collection,
// so set it to 0 in that case.
// It sure beats the alternative of a drop dead crash. :-)
if (newCurrentIndex > SortedObjects.Count - 1 || newCurrentIndex < 0)
newCurrentIndex = 0; // out of bounds, so set it to 0.
}
else
{
newCurrentIndex = -1;
}
CurrentIndex = newCurrentIndex;
m_cache.VwCacheDaAccessor.CacheVecProp(rootHvo, m_virtualFlid, hvos, hvos.Length);
m_cache.MainCacheAccessor.PropChanged(this, (int)PropChangeType.kpctNotifyAllButMe,
rootHvo,
m_virtualFlid,
0, // Start at the beginning of the vector
hvos.Length, // Pretend like we inserted and deleted them all,
oldLength); // since we kind if did it that way.
m_oldLength = hvos.Length;
//TODO: try to stay on the same record
/// Currently Attempts to keep us at the same index as we were.
/// we should try hard to keep us on the actual record that we were currently on,
/// since the reload may be a result of changing the sort order, in which case the index is meaningless.
//make sure the hvo index is in a reasonable spot
if (m_currentIndex >= hvos.Length)
CurrentIndex = hvos.Length -1;
if (m_currentIndex < 0)
CurrentIndex = (hvos.Length>0)? 0: -1;
if (DoneReload != null)
DoneReload(this, new EventArgs());
// Notify any delegates that the selection of the main object in the vector has changed.
if (ListChanged != null && m_fEnableSendPropChanged)
ListChanged(this, new ListChangedEventArgs(this, actions));
}