private void OnPreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Space)
{
if (KeyboardHelper.AreKeyboardModifiersPressed(ModifierKeys.Control))
{
UpdateSuggestionBox(true);
e.Handled = true;
}
}
if (e.Key == Key.Down)
{
if (_suggestionListBox.SelectedIndex < _suggestionListBox.Items.Count)
{
_suggestionListBox.SelectedIndex = _suggestionListBox.SelectedIndex + 1;
}
}
if (e.Key == Key.Up)
{
if (_suggestionListBox.SelectedIndex > -1)
{
_suggestionListBox.SelectedIndex = _suggestionListBox.SelectedIndex - 1;
}
}
if (e.Key == Key.Enter || e.Key == Key.Tab)
{
// Commit the selection
UpdateSuggestionBox(false);
e.Handled = (e.Key == Key.Enter);
var binding = AssociatedObject.GetBindingExpression(TextBox.TextProperty);
if (binding != null)
{
binding.UpdateSource();
}
}
if (e.Key == Key.Escape)
{
if (_popup.IsOpen)
{
// Cancel the selection
UpdateSuggestionBox(false);
_isUpdatingAssociatedObject = true;
AssociatedObject.Text = _valueAtSuggestionBoxOpen;
e.Handled = true;
}
}
}
/// <summary>
/// Invokes the command with the overriden parameter.
/// <para />
/// If the <see cref="CommandParameter"/> should be used, use the <see cref="ExecuteCommand()"/> instead.
/// </summary>
/// <param name="parameter">The parameter that will override the <see cref="CommandParameter"/>.</param>
protected virtual void ExecuteCommand(object parameter)
{
// CTL-638
if (Modifiers != ModifierKeys.None)
{
if (!KeyboardHelper.AreKeyboardModifiersPressed(Modifiers))
{
return;
}
}
if (CanExecuteCommand(parameter))
{
_command.Execute(parameter);
}
}
private static bool IsDigit(Key key)
{
bool isDigit;
var isShiftKey = KeyboardHelper.AreKeyboardModifiersPressed(ModifierKeys.Shift);
if (key >= Key.D0 && key <= Key.D9 && !isShiftKey)
{
isDigit = true;
}
else
{
isDigit = key >= Key.NumPad0 && key <= Key.NumPad9;
}
return(isDigit);
}
protected override void Initialize()
{
base.Initialize();
var adornerLayer = AdornerLayer.GetAdornerLayer(Adorner ?? AssociatedObject);
if (adornerLayer == null)
{
Log.Error("Cannot find AdornerLayer. Use the Adorner property to specify a specific instance to use when searching for an adorner layer");
return;
}
if (KeyboardHelper.AreKeyboardModifiersPressed(System.Windows.Input.ModifierKeys.Alt))
{
var adorneredTooltipsManager = _adorneredTooltipsManagerFactory.Create(adornerLayer);
adorneredTooltipsManager.Enable();
}
}
/// <summary>
/// Determines whether the command can be invoked. It does this by checking both the <see cref="Modifiers"/> and
/// the command itself.
/// <para />
/// If the <see cref="CommandParameter"/> should be used, use the <see cref="CanExecuteCommand()"/> instead.
/// </summary>
/// <returns><c>true</c> if the command can be invoked; otherwise, <c>false</c>.</returns>
protected virtual bool CanExecuteCommand(object parameter)
{
var command = _command;
if (command == null)
{
return(false);
}
if (Modifiers != ModifierKeys.None)
{
if (!KeyboardHelper.AreKeyboardModifiersPressed(Modifiers))
{
return(false);
}
}
return(command.CanExecute(parameter));
}
/// <summary>
/// Called when the specified key is pressed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The key event args instance containing the event data.</param>
private void OnKeyDown(object sender, KeyDownEventArgs e)
{
if (!IsEnabled)
{
return;
}
if (e.Handled)
{
return;
}
if (KeyboardHelper.AreKeyboardModifiersPressed(Modifiers))
{
if (e.Key == Key)
{
StartFocus();
e.Handled = true;
}
}
}
