private static void TextBox_Loaded(object sender, RoutedEventArgs e)
{
TextBoxBase textBox = (TextBoxBase)sender;
textBox.Loaded -= Watermarking.TextBox_Loaded;
if (Watermarking.GetContent(textBox) is object content)
{
Watermarking.SetAdorner(textBox, new WatermarkAdorner(textBox, content, Watermarking.GetContentTemplate(textBox)));
}
}
private static void ContentProperty_ValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (!(d is TextBoxBase textBox))
{
return;
}
if (textBox.IsLoaded)
{
Watermarking.SetAdorner(textBox, e.NewValue == null ? default : new WatermarkAdorner(textBox, e.NewValue, Watermarking.GetContentTemplate(textBox)));
}
else if (e.NewValue != null && e.OldValue == null)
{
textBox.Loaded += Watermarking.TextBox_Loaded;
}
else if (e.NewValue == null && e.OldValue != null)
{
textBox.Loaded -= Watermarking.TextBox_Loaded;
}
}