/// <summary>
/// Converts source values to a value for the binding target. The data binding engine calls this method when it
/// propagates the values from source bindings to the binding target.
/// </summary>
/// <param name="values">
/// The array of values that the source bindings in the
/// <see cref="T:System.Windows.Data.MultiBinding"/> produces. The value
/// <see cref="F:System.Windows.DependencyProperty.UnsetValue"/> indicates that the source binding has no value to
/// provide for conversion.
/// </param>
/// <param name="targetType">
/// The type of the binding target property.
/// </param>
/// <param name="parameter">
/// The converter parameter to use.
/// </param>
/// <param name="culture">
/// The culture to use in the converter.
/// </param>
/// <returns>
/// A converted value.If the method returns null, the valid null value is used.A return value of
/// <see cref="T:System.Windows.DependencyProperty"/>.<see cref="F:System.Windows.DependencyProperty.UnsetValue"/>
/// indicates that the converter did not produce a value, and that the binding will use the
/// <see cref="P:System.Windows.Data.BindingBase.FallbackValue"/> if it is available, or else will use the default
/// value.A return value of <see cref="T:System.Windows.Data.Binding"/>.
/// <see cref="F:System.Windows.Data.Binding.DoNothing"/> indicates that the binding does not transfer the value or
/// use the <see cref="P:System.Windows.Data.BindingBase.FallbackValue"/> or the default value.
/// </returns>
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
var newCollection = new ObservableCollection<ITreeItem>();
try
{
var text = parameter as string;
var descriptions = new string[values.Length];
if (text != null)
{
descriptions = text.Split(GenericConstants.CHAR_ARRAY_COMMA);
}
var collCtr = 0;
foreach (var sourceColl in values)
{
if (!(sourceColl is IEnumerable))
{
continue;
}
var parentTreeItem = new TreeItem(string.Empty)
{
Description =
string.IsNullOrEmpty(descriptions[collCtr])
? string.Empty
: descriptions[collCtr]
};
parentTreeItem.Children = sourceColl as IEnumerable;
// must assign it here otherwise when the children are added they are not updated.
collCtr++;
newCollection.Add(parentTreeItem);
}
}
catch (Exception exception)
{
CustomLogger.LogException(exception, "Problem combining collections.");
return DependencyProperty.UnsetValue;
}
return newCollection;
}
/// <summary>
/// The create revision definition.
/// </summary>
/// <param name="startItem">
/// The start item.
/// </param>
public void CreateRevisionDefinition(TreeItem startItem)
{
startItem.AddChildrenToCollection(this.RevisionDefinitionItemCollection);
}
