/// <summary>
/// Called when this element or any below gets focus.
/// </summary>
private static void OnGotFocus(object sender, RoutedEventArgs e)
{
// When NumericUpDown gets logical focus, select the text inside us.
// If we're an editable NumericUpDown, forward focus to the TextBox element
if (!e.Handled)
{
NumericUpDown numericUpDown = (NumericUpDown)sender;
if ((numericUpDown.InterceptManualEnter || numericUpDown.IsReadOnly) && numericUpDown.Focusable && e.OriginalSource == numericUpDown)
{
// MoveFocus takes a TraversalRequest as its argument.
var request = new TraversalRequest((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift ? FocusNavigationDirection.Previous : FocusNavigationDirection.Next);
// Gets the element with keyboard focus.
var elementWithFocus = Keyboard.FocusedElement as UIElement;
// Change keyboard focus.
if (elementWithFocus != null)
{
elementWithFocus.MoveFocus(request);
}
else
{
numericUpDown.Focus();
}
e.Handled = true;
}
}
}
/// <summary>
/// Called when a cell has just switched to edit mode.
/// </summary>
/// <param name="editingElement">A reference to element returned by GenerateEditingElement.</param>
/// <param name="editingEventArgs">The event args of the input event that caused the cell to go into edit mode. May be null.</param>
/// <returns>The unedited value of the cell.</returns>
protected override object PrepareCellForEdit(FrameworkElement editingElement, RoutedEventArgs editingEventArgs)
{
NumericUpDown numericUpDown = editingElement as NumericUpDown;
if (numericUpDown != null)
{
numericUpDown.Focus();
numericUpDown.SelectAll();
return(numericUpDown.Value);
}
return(null);
}