public void Attach()
{
foreach (var dep in Dependencies)
{
dep.Successors.Set(this);
}
value = SL.FirstOrDefault(source);
}
public void Attach()
{
if (!isAttached)
{
value = SL.FirstOrDefault(source);
source.CollectionChanged += SourceCollectionChanged;
isAttached = true;
}
}
private void SourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Reset ||
(e.OldItems != null && e.OldStartingIndex <= 0) ||
(e.NewItems != null && e.NewStartingIndex <= 0))
{
SetValue(SL.FirstOrDefault(source));
}
}
public INotificationResult Notify(IList <INotificationResult> sources)
{
var newValue = SL.FirstOrDefault(source);
if (!EqualityComparer <TSource> .Default.Equals(value, newValue))
{
oldValue = value;
value = newValue;
OnValueChanged();
return(this);
}
return(UnchangedNotificationResult.Instance);
}
//Note: currently the selected features are one select behind.
//e.g on drawing the first region all the layers features are returned
// on drawing the second region all the features matching the first region are returned etc..
private void AttributeQueryHandler_End(object sender, MapActionHandlerEventArgs e)
{
IFeatureLayer l =
Enumerable.FirstOrDefault(
Caster.Cast <IFeatureLayer>(
Processor.Where(Map.SelectedLayers, delegate(ILayer o) { return(o as IFeatureLayer != null); })));
if (l != null)
{
FeatureDataView dv = new FeatureDataView(l.SelectedFeatures.Table);
if (l.SelectedFeatures.AttributeFilter != null)
{
dv.AttributeFilter =
(AttributeBinaryExpression)
l.SelectedFeatures.AttributeFilter.Clone();
}
if (l.SelectedFeatures.SpatialFilter != null)
{
dv.SpatialFilter =
(SpatialBinaryExpression)
l.SelectedFeatures.SpatialFilter.Clone();
}
if (l.SelectedFeatures.OidFilter != null)
{
dv.OidFilter =
(OidCollectionExpression)
l.SelectedFeatures.OidFilter.Clone();
}
if (l.SelectedFeatures.ViewDefinition != null)
{
dv.ViewDefinition =
(FeatureQueryExpression)
l.SelectedFeatures.ViewDefinition.Clone();
}
QueryResultsTab tab = new QueryResultsTab(l.LayerName, dv);
resultsTabControl.TabPages.Insert(0, tab);
resultsTabControl.SelectedTab = tab;
}
}
private Boolean inOidFilter(FeatureDataRow feature)
{
if (!feature.HasOid)
{
return(false);
}
if (_viewDefinition == null || _viewDefinition.OidPredicate == null)
{
return(true);
}
// NOTE: This will get to be a performance problem due to the
// poor structuring of the OID values. Consider creating a local,
// sorted index where a binary search can be performed.
IEnumerable oids = _viewDefinition.OidPredicate.OidValues;
Int32 count = 0;
if (Enumerable.FirstOrDefault(Caster.Cast <object>(oids)) == null) //jd:added explicit type param to allow compiliation in net3.5
{
return(true);
}
Object featureOid = feature.GetOid();
Debug.Assert(featureOid != null);
foreach (Object oid in oids)
{
if (featureOid.Equals(oid))
{
return(true);
}
}
return(false);
}
private static WriteablePropertyDescriptor FindWritable(string columnName, IEnumerable <WriteablePropertyDescriptor> writables)
{
return(Enumerable.FirstOrDefault(writables, writable => writable.PropertyName.Equals(columnName)));
}
// Searches all Players to find the next Player without a Joystick assigned
private Player FindPlayerWithoutJoystick()
{
IList <Player> players = ReInput.players.Players;
return(Enumerable.FirstOrDefault(players, player => player.controllers.joystickCount <= 0));
}