public void ArrangeOverrideWhenChildIsNull()
{
var textBox = new TextBox();
var adorner = new WatermarkAdorner(textBox) { Child = null };
var result = ArrangeOverrideMethod.Invoke(adorner, new object[] { new Size(0, 0) });
Assert.AreEqual(new Size(0, 0), result);
}
public void ArrangeOverrideWhenChildIsNull()
{
var textBox = new TextBox();
var adorner = new WatermarkAdorner(textBox)
{
Child = null
};
var result = ArrangeOverrideMethod.Invoke(adorner, new object[] { new Size(0, 0) });
Assert.AreEqual(new Size(0, 0), result);
}
private static void AdornerProperty_ValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TextBoxBase textBox = (TextBoxBase)d;
if (e.OldValue != null)
{
using WatermarkAdorner adorner = (WatermarkAdorner)e.OldValue;
AdornerLayer adornerLayer = adorner.FindVisualTreeAncestor <AdornerLayer>() ?? AdornerLayer.GetAdornerLayer(textBox);
adornerLayer.Remove(adorner);
}
if (e.NewValue != null)
{
AdornerLayer.GetAdornerLayer(textBox).Add((WatermarkAdorner)e.NewValue);
}
}
private static void OnIsShowingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
////Debug.Print($"Visible changed to: {e.NewValue}");
var textBox = (TextBox)d;
if (Equals(e.NewValue, true))
{
var adorner = textBox.GetAdorner();
if (adorner == null)
{
adorner = new WatermarkAdorner(textBox);
textBox.SetAdorner(adorner);
var textStyle = textBox.GetTextStyle();
if (textStyle != null)
{
adorner.SetCurrentValue(WatermarkAdorner.TextStyleProperty, textStyle);
}
AdornerService.Show(adorner);
textBox.SetCurrentValue(AdornerProperty, adorner);
}
else
{
Debug.Assert(false, "Already visible");
}
}
else
{
var adorner = textBox.GetAdorner();
if (adorner != null)
{
AdornerService.Remove(adorner);
textBox.ClearValue(AdornerProperty);
}
}
}
private static void SetAdorner(this DependencyObject element, WatermarkAdorner value)
{
element.SetValue(AdornerProperty, value);
}
