public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_upperLoadingBar = GetTemplateChild("PART_UpperLoadingBar") as LoadingBar;
_bottomLoadingBar = GetTemplateChild("PART_BottomLoadingBar") as LoadingBar;
Utility.PerformOnDispatcher(Dispatcher, () => { SetDropDownLoadingIndicator(IsLoading); });
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_border = GetTemplateChild("PART_Border") as Border;
_dropDown = GetTemplateChild("PART_DropDown") as Popup;
_lbDropDown = GetTemplateChild("PART_LBDropDown") as ListBox;
_arrowHost = GetTemplateChild("PART_ArrowHost") as Border;
_borderDropDown = GetTemplateChild("PART_BorderDropDown") as Border;
_upperLoadingBar = GetTemplateChild("PART_UpperLoadingBar") as LoadingBar;
_bottomLoadingBar = GetTemplateChild("PART_BottomLoadingBar") as LoadingBar;
SetDropDownLoadingIndicator();
_lbDropDown.ItemTemplate = DropDownItemTemplate;
var style = new Style(typeof(ListBoxItem), (Style)FindResource("lbAutocompleteTextBoxDropDownItemStyle"));
style.Setters.Add(new EventSetter(Mouse.PreviewMouseUpEvent, new MouseButtonEventHandler(lbDropDownItem_PreviewMouseButtonUp)));
style.Setters.Add(new EventSetter(Mouse.MouseMoveEvent, new MouseEventHandler(lbDropDownItem_MouseMove)));
_lbDropDown.ItemContainerStyle = style;
_border.CornerRadius = CornerRadius;
_lbDropDownItemMouseMoves
.DistinctUntilChanged(x => x.EventArgs.GetPosition(this))
.Subscribe(x => _lbDropDown.SelectedItem = x.Sender.Content);
var previewKeyDowns = Observable.FromEventPattern<KeyEventHandler, KeyEventArgs>(
h => PreviewKeyDown += h, h => PreviewKeyDown -= h);
previewKeyDowns.Where(x => x.EventArgs.Key == Key.Enter)
.Subscribe(x => AcceptItem(x.EventArgs));
var previewKeyDownsKeyDowns = previewKeyDowns.Where(x => x.EventArgs.Key == Key.Down);
previewKeyDownsKeyDowns.Where(_ => _dropDown.IsOpen).Subscribe(_ => MoveDown());
previewKeyDownsKeyDowns.Where(_ => !_dropDown.IsOpen).Subscribe(_ => OpenDropDownByArrowButtonOrKey());
previewKeyDowns.Where(x => x.EventArgs.Key == Key.Up).Subscribe(_ => MoveUp());
previewKeyDowns.Where(x => x.EventArgs.Key == Key.Escape).Subscribe(_ => CancelOrIgnore());
previewKeyDowns.Where(x => x.EventArgs.Key == Key.PageUp).Subscribe(_ => MovePageUp());
previewKeyDowns.Where(x => x.EventArgs.Key == Key.PageDown).Subscribe(_ => MovePageDown());
var downs = _arrowHost.Events().MouseLeftButtonDown
.Select(_ => Mouse.Captured)
.Do(_ => Mouse.Capture(_arrowHost));
var ups = _arrowHost.Events().MouseLeftButtonUp;
downs
.GroupJoin(ups, d => downs, u => Observable.Return(Unit.Default),
(d, us) => ups.Take(1).Select(_ => d))
.Merge()
.Do(RestoreMouseCapture)
.Subscribe(_ => OpenDropDownByArrowButtonOrKey());
_dropDown.Closed += _dropDown_Closed;
_dropDown.Opened += dropDown_Opened;
LostFocus += AutocompleteTextBox_LostFocus;
}