private static void UpdateIsShowing(TextBox textBox)
{
if (textBox == null)
{
return;
}
if (!textBox.IsVisible || !textBox.IsLoaded || string.IsNullOrEmpty(GetText(textBox)))
{
textBox.SetIsShowing(false);
}
else
{
switch (textBox.GetVisibleWhen())
{
case WatermarkVisibleWhen.Empty:
textBox.SetIsShowing(string.IsNullOrEmpty(textBox.Text));
break;
case WatermarkVisibleWhen.EmptyAndNotKeyboardFocused:
textBox.SetIsShowing(string.IsNullOrEmpty(textBox.Text) && !textBox.IsKeyboardFocused);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}