private void SuggestionsProvidedEventHandler(object sender, SuggestionsProvidedEventArgs e)
{
var childLookup = _lookupHandlers[(ISuggestionProvider)sender];
// update the cached list of suggested items for the child lookup handler
var items = _owner.SuggestedItemsCache[childLookup];
items.Clear();
items.AddRange(new TypeSafeEnumerableWrapper<object>(e.Items));
// provide aggregate list of items
var aggregate = CollectionUtils.Concat(new List<List<object>>(_owner.SuggestedItemsCache.Values));
// sort the aggregate list according to the formatting of each item
aggregate.Sort((x, y) => _owner.FormatItem(x).CompareTo(_owner.FormatItem(y)));
EventsHelper.Fire(_suggestionsProvided, this, new SuggestionsProvidedEventArgs(aggregate));
}
private void ItemsProvidedEventHandler(object sender, SuggestionsProvidedEventArgs e)
{
// Remember the current text and selection start,
// as they exists prior to modifying the items collection
var curText = this.Text;
var cursorPosition = this.SelectionStart;
if (e.Items.Count == 0)
{
try
{
this.DroppedDown = false;
// there are no suggestions, so clear the items list
this.Items.Clear();
// reset text back to original text
// and return the cursor to the original position
this.Text = curText;
this.SelectionStart = cursorPosition;
}
catch (ArgumentOutOfRangeException)
{
// just in case...it throws the exception while clearing the list
}
}
else
{
// at least 1 suggestion exists
// open the dropdown menu
this.DroppedDown = true;
// update list
UpdateListItems(e.Items);
// set cursor to the end
this.Text = curText;
this.SelectionStart = curText.Length;
this.SelectionLength = 0;
}
}
private void ItemsProvidedEventHandler(object sender, SuggestionsProvidedEventArgs e)
{
// Remember the current text and selection start,
// as they exists prior to modifying the items collection
var curText = this.Text;
var cursorPosition = this.SelectionStart;
if (e.Items.Count == 0)
{
try
{
this.DroppedDown = false;
// there are no suggestions, so clear the items list
this.Items.Clear();
// reset text back to original text
// and return the cursor to the original position
this.Text = curText;
this.SelectionStart = cursorPosition;
}
catch (ArgumentOutOfRangeException)
{
// just in case...it throws the exception while clearing the list
}
}
else
{
// at least 1 suggestion exists
// open the dropdown menu
this.DroppedDown = true;
// update list
UpdateListItems(e.Items);
// set cursor to the end
this.Text = curText;
this.SelectionStart = curText.Length;
this.SelectionLength = 0;
}
}
