private async void on_textChange(object sender, TextChangedEventArgs e)
{
if (string.IsNullOrWhiteSpace(textBox.Text))
{
lbSuggestion.Visibility = Visibility.Collapsed;
return;
}
string typedText = textBox.Text;
List <GoogleSuggestion> suggestionList = new List <GoogleSuggestion>();
suggestionList.Clear();
SearchSuggestionsAPI searchSuggestionsAPI = new SearchSuggestionsAPI();
suggestionList = await searchSuggestionsAPI.GetSearchSuggestions(typedText);
if (suggestionList.Count > 0)
{
lbSuggestion.ItemsSource = suggestionList.Select(x => x.ToString()).ToList();
lbSuggestion.Visibility = Visibility.Visible;
}
else if (typedText.Equals(""))
{
lbSuggestion.ItemsSource = null;
lbSuggestion.Visibility = Visibility.Collapsed;
}
else
{
lbSuggestion.ItemsSource = null;
lbSuggestion.Visibility = Visibility.Collapsed;
}
}
private Task <List <GoogleSuggestion> > giveSuggestions(string m_toComplete)
{
List <string> ans = new List <string>();
SearchSuggestionsAPI s = new SearchSuggestionsAPI();
var res = s.GetSearchSuggestions(m_toComplete);
return(res);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
txt = this.Template.FindName("PART_textbox", this) as TextBox;
if (txt == null)
{
return;
}
richtxt = this.Template.FindName("FlowDoc", this) as RichTextBox;
if (richtxt == null)
{
return;
}
var border = this.Template.FindName("PART_richborder", this) as Border;
if (border == null)
{
return;
}
var popup = Template.FindName("PART_popup", this) as Popup;
if (popup == null)
{
return;
}
var listbox = Template.FindName("PART_listbox", this) as ListBox;
if (listbox == null)
{
return;
}
var search = new SearchSuggestionsAPI();
Task <List <GoogleSuggestion> > task;
border.PreviewMouseDown += (oo, ee) =>
{
border.Visibility = Visibility.Hidden;
txt.Visibility = Visibility.Visible;
txt.Focus();
ee.Handled = true;
IsFocused = true;
};
var arrows = new List <Key>()
{
Key.Up, Key.Down
};
txt.PreviewKeyUp += async(oo, ee) =>
{
cts?.Cancel();
if (arrows.Contains(ee.Key))
{
ee.Handled = true;
if (ee.Key == Key.Down && listbox.SelectedIndex < listbox.Items.Count - 1)
{
listbox.SelectedIndex += 1;
}
else if (ee.Key == Key.Up && listbox.SelectedIndex > 0)
{
listbox.SelectedIndex -= 1;
}
return;
}
if (ee.Key == Key.Back || ee.Key == Key.Tab)
{
return;
}
var localcts = new CancellationTokenSource();
cts = localcts;
try
{
FilteredItems.Clear();
if (History.Any(i => i.StartsWith(txt.Text)))
{
popup.IsOpen = History.Count(i => i.StartsWith(txt.Text)) != 1;
History.Where(i => i.StartsWith(txt.Text)).ToList().ForEach(i =>
{
if (FilteredItems.Count >= 7)
{
return;
}
FilteredItems.Add(i);
});
var length = txt.SelectionStart;
popup.IsOpen = History.Count(i => i.StartsWith(txt.Text)) != 1 && FilteredItems.Count > 0;
txt.Text = History.First(i => i.StartsWith(txt.Text));
txt.Select(length, txt.Text.Length - length);
}
else
{
popup.IsOpen = false;
}
await Task.Delay(500, cts.Token);
task = search.GetSearchSuggestions(txt.Text, localcts.Token);
var list = await task;
if (localcts.IsCancellationRequested)
{
return;
}
popup.IsOpen = (list.Count > 0 || FilteredItems.Count > 0);
if (FilteredItems.Count == 0 && list.First().Phrase.StartsWith(txt.Text) && FilteredItems.Count == 0)
{
var length = txt.SelectionStart;
txt.Text = list.First().Phrase;
txt.Select(length, txt.Text.Length - length);
}
foreach (var suggestion in list)
{
if (FilteredItems.Count >= 7)
{
continue;
}
if (FilteredItems.Contains(suggestion.Phrase))
{
continue;
}
FilteredItems.Add(suggestion.Phrase);
}
}
catch
{
//ignore
}
};
listbox.SelectionChanged += (oo, ee) =>
{
var t = listbox.SelectedItem as string;
if (t == null)
{
return;
}
Text = t;
txt.CaretIndex = t.Length;
};
listbox.PreviewMouseUp += (oo, ee) =>
{
popup.IsOpen = false;
OnReturnPress();
};
listbox.PreviewKeyDown += (oo, ee) =>
{
if (ee.Key != Key.Return)
{
return;
}
popup.IsOpen = false;
OnReturnPress();
};
txt.PreviewKeyDown += (oo, ee) =>
{
if (ee.Key != Key.Return)
{
return;
}
popup.IsOpen = false;
OnReturnPress();
};
txt.LostKeyboardFocus += (sender, args) =>
{
txt.Visibility = Visibility.Hidden;
border.Visibility = Visibility.Visible;
IsFocused = false;
};
listbox.ItemsSource = FilteredItems;
ApplyText(Text);
}
