private void MoveCurrentByIdx(int relativeIndex)
{
int newPosition = TheCompletionsCollectionView.CurrentPosition + relativeIndex;
int totalNumberItems = 0;
foreach (var obj in TheCompletionsCollectionView)
{
totalNumberItems++;
}
if (totalNumberItems == 0)
{
return;
}
if (newPosition >= totalNumberItems)
{
newPosition = totalNumberItems - 1;
}
if (newPosition < 0)
{
newPosition = 0;
}
TheCompletionsCollectionView.MoveCurrentToPosition(newPosition);
ScrollAsync();
}
void SelectItemBasedOnTextFiltering()
{
string userText = UserText;
bool foundCompletion = false;
// if we find completion that starts with the text
// we choose it.
if (!string.IsNullOrEmpty(userText))
{
foreach (Completion completion in TheCompletionsCollectionView)
{
if (completion.DisplayText?.ToLower().StartsWith(userText) == true)
{
SelectItem(completion);
foundCompletion = true;
break;
}
}
}
// if the match by text was not found
// we move the current item to the first of
// items within the filtered collection
if (!foundCompletion)
{
TheCompletionsCollectionView.MoveCurrentToFirst();
}
// we force the ListView to scroll to the
// current item
ScrollAsync();
}
private void TextBuffer_Changed(object sender, TextContentChangedEventArgs e)
{
// refresh the filter
TheCompletionsCollectionView.Refresh();
// choose the CompletionStatus based on the new filtering
SelectItemBasedOnTextFiltering();
}
void SelectItem(Completion completionItem)
{
TheCompletionsCollectionView.MoveCurrentTo(completionItem);
}
// force refiltering of the CollectionView
private void Filter_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
TheCompletionsCollectionView.Refresh();
}
