private void _input_TextChanged(object sender, TextChangedEventArgs e)
{
if (SuggestEngine != null)
{
Suggestions = SuggestEngine.GetSuggestionsFor(Input.Text);
if (PrevText != Input.Text && IsKeyboardFocusWithin)
{
if (Suggestions.Count() > 0)
{
Popup.IsOpen = true;
}
else
{
Popup.IsOpen = false;
}
PrevText = Input.Text;
if (Selected != null)
{
Selected = null;
}
}
else
{
if (!IsKeyboardFocusWithin)
{
ChangedInBackground = true;
Selected = null;
}
}
}
}
private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ListBox.IsKeyboardFocusWithin && ListBox.SelectedIndex >= 0)
{
var selected = ListBox.SelectedItem;
PrevText = SuggestEngine.ToText(selected);
Input.Text = PrevText;
Input.Focus();
Input.CaretIndex = Input.Text.Length;
Popup.IsOpen = false;
Selected = selected;
}
}
private void ListBox_MouseDown(object sender, MouseButtonEventArgs e)
{
var selected = ListBox.SelectedItem;
if (selected != null)
{
PrevText = SuggestEngine.ToText(selected);
Input.Text = PrevText;
Input.Focus();
Input.CaretIndex = Input.Text.Length;
Popup.IsOpen = false;
Selected = selected;
}
}
private void _input_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Down)
{
if (Popup.IsOpen)
{
var index = ListBox.SelectedIndex;
if (index < 0)
{
ListBox.SelectedIndex = 0;
}
else
{
var d = ListBox.SelectedItemProperty;
if (index + 1 < ListBox.Items.Count)
{
ListBox.SelectedIndex = index + 1;
Scroll.ScrollToVerticalOffset(Scroll.ContentVerticalOffset + offset());
}
}
}
e.Handled = true;
}
if (e.Key == Key.Up)
{
if (Popup.IsOpen)
{
var index = ListBox.SelectedIndex;
if (index > 0)
{
ListBox.SelectedIndex = index - 1;
}
Scroll.ScrollToVerticalOffset(Scroll.ContentVerticalOffset - offset());
}
e.Handled = true;
}
if (e.Key == Key.PageDown)
{
if (Popup.IsOpen)
{
ListBox.SelectedIndex = ListBox.Items.Count - 1;
Scroll.ScrollToBottom();
}
e.Handled = true;
}
if (e.Key == Key.PageUp)
{
if (Popup.IsOpen)
{
ListBox.SelectedIndex = 0;
Scroll.ScrollToTop();
}
e.Handled = true;
}
if (e.Key == Key.Enter)
{
if (Popup.IsOpen)
{
var selected = ListBox.SelectedItem;
if (selected != null)
{
PrevText = SuggestEngine.ToText(selected);
Input.Text = PrevText;
Input.Focus();
Input.CaretIndex = Input.Text.Length;
}
Popup.IsOpen = false;
Selected = selected;
}
e.Handled = true;
}
if (e.Key == Key.Escape)
{
if (Popup.IsOpen)
{
Popup.IsOpen = false;
}
}
}