void UpdateSuggestionList()
{
//find suggestion words
_currentLocalText = null;
_listbox.ClearItems();
TextEditing.Run currentSpan = _textbox.CurrentTextSpan;
if (currentSpan == null)
{
_listbox.Visible = false;
return;
}
//-------------------------------------------------------------------------
//sample parse ...
//In this example all country name start with Captial letter so ...
//try to get underlining text
//int startAt, len;
//textbox.FindCurrentUnderlyingWord(out startAt, out len);
string currentTextSpanText = currentSpan.GetText().ToUpper();
//analyze content
char[] textBuffer = currentTextSpanText.ToCharArray();
_textSplitBoundsList.Clear();
_textSplitBoundsList.AddRange(_textbox.TextSplitter.ParseWordContent(textBuffer, 0, textBuffer.Length));
//get last part of splited text
int m = _textSplitBoundsList.Count;
if (m < 1)
{
return;
}
int splitBoundIndex = GetProperSplitBoundIndex(_textSplitBoundsList, _textbox.CurrentLineCharIndex);
if (splitBoundIndex < 0)
{
return;
}
//find current split bounds
Composers.TextSplitBounds selectBounds = _textSplitBoundsList[splitBoundIndex];
_currentLocalText = GetString(textBuffer, selectBounds);
char firstChar = _currentLocalText[0];
if (_words.TryGetValue(firstChar, out List <string> keywords))
{
int j = keywords.Count;
int listViewWidth = _listbox.Width;
for (int i = 0; i < j; ++i)
{
string choice = keywords[i].ToUpper();
if (StringStartsWithChars(choice, _currentLocalText))
{
CustomWidgets.ListItem item = new CustomWidgets.ListItem(listViewWidth, 17);
item.BackColor = KnownColors.LightGray;
item.Tag = item.Text = keywords[i];
_listbox.AddItem(item);
}
}
}
if (_listbox.ItemCount > 0)
{
_listbox.Visible = true;
//TODO: implement selectedIndex suggestion hint here ***
_listbox.SelectedIndex = 0;
//move listview under caret position
var caretPos = _textbox.CaretPosition;
//temp fixed
//TODO: review here
_listbox.SetLocation(_textbox.Left + caretPos.X, _textbox.Top + caretPos.Y + 20);
_listbox.EnsureSelectedItemVisible();
}
else
{
_listbox.Visible = false;
}
//-------------------------------------------------------------------------
}