public override void OnApplyTemplate()
{
base.OnApplyTemplate();
Editor = Template.FindName(PartEditor, this) as TextBox;
Popup = Template.FindName(PartPopup, this) as Popup;
ItemsSelector = Template.FindName(PartSelector, this) as Selector;
BindingEvaluator = new BindingEvaluator(new Binding(DisplayMember));
if (Editor != null)
{
Editor.TextChanged += OnEditorTextChanged;
Editor.PreviewKeyDown += OnEditorKeyDown;
Editor.LostFocus += OnEditorLostFocus;
if (SelectedItem != null)
{
Editor.Text = BindingEvaluator.Evaluate(SelectedItem);
}
}
if (Popup != null)
{
Popup.StaysOpen = false;
Popup.Opened += OnPopupOpened;
Popup.Closed += OnPopupClosed;
}
if (ItemsSelector != null)
{
SelectionAdapter = new SelectionAdapter(ItemsSelector);
SelectionAdapter.Commit += OnSelectionAdapterCommit;
SelectionAdapter.Cancel += OnSelectionAdapterCancel;
SelectionAdapter.SelectionChanged += OnSelectionAdapterSelectionChanged;
}
}
private void OnEditorKeyDown(object sender, KeyEventArgs e)
{
if (SelectionAdapter != null)
{
if (IsDropDownOpen)
{
SelectionAdapter.HandleKeyDown(e);
}
else
{
IsDropDownOpen = e.Key == Key.Down || e.Key == Key.Up;
}
}
}