// Note that this can be called if e.g. the Layouter's AnchoringRect changes
protected override void OnLayouterResultChanged(PropertyChangedEventArgs <LayoutResult> args)
{
var dpiResolution = DpiResolutions.FromAvalonElement(window);
var location = args.New.Bounds.ToAvalonRect(dpiResolution);
window.Top = location.Top;
window.Left = location.Left;
}
// Use the desired size to calculate a new layout
// Called from:
// * ctor (although unlikely to be valid)
// * OnSourceInitialized
// * Before show
// * On size changed
private void UpdatePopupLayout()
{
if (!window.IsMeasureValid)
{
window.Measure(new Size(double.MaxValue, double.MaxValue));
}
if (window.IsMeasureValid)
{
// Setting this causes the Layouter to compute a new LayoutResult and
// we get notified via OnLayouterResultChanged
var dpiResolution = DpiResolutions.FromAvalonElement(window);
Layouter.Size.Value = window.DesiredSize.ToWinFormsSize(dpiResolution);
// TODO: Should we check to see if the layouter gives us a different size, then re-measure?
}
}