protected override global::Windows.Foundation.Size MeasureOverride(global::Windows.Foundation.Size availableSize)
{
Size request = _view.Measure(availableSize.Width, availableSize.Height, MeasureFlags.IncludeMargins).Request;
if (request.Height < 0)
{
request.Height = availableSize.Height;
}
global::Windows.Foundation.Size result;
if (_view.HorizontalOptions.Alignment == LayoutAlignment.Fill && !double.IsInfinity(availableSize.Width) && availableSize.Width != 0)
{
result = new global::Windows.Foundation.Size(availableSize.Width, request.Height);
}
else
{
result = new global::Windows.Foundation.Size(request.Width, request.Height);
}
Layout.LayoutChildIntoBoundingRegion(_view, new Rectangle(0, 0, result.Width, result.Height));
FrameworkElement?.Measure(availableSize);
return(result);
}
//TODO: We need to revisit this later when we complete the UI Tests for UWP.
// Changing the AutomationPeer here prevents the Narrator from functioning properly.
// Oddly, it affects more than just the TextBlocks. It seems to break the entire scan mode.
//protected override AutomationPeer OnCreateAutomationPeer()
//{
// // We need an automation peer so we can interact with this in automated tests
// if (Control == null)
// {
// return new FrameworkElementAutomationPeer(this);
// }
// return new TextBlockAutomationPeer(Control);
//}
protected override global::Windows.Foundation.Size ArrangeOverride(global::Windows.Foundation.Size finalSize)
{
if (Element == null)
{
return(finalSize);
}
double childHeight = Math.Max(0, Math.Min(Element.Height, Control.DesiredSize.Height));
var rect = new Rect();
switch (Element.VerticalTextAlignment)
{
case TextAlignment.Start:
break;
default:
case TextAlignment.Center:
rect.Y = (int)((finalSize.Height - childHeight) / 2);
break;
case TextAlignment.End:
rect.Y = finalSize.Height - childHeight;
break;
}
rect.Height = childHeight;
rect.Width = finalSize.Width;
Control.Arrange(rect);
Control.RecalculateSpanPositions(Element, _inlineHeights);
return(finalSize);
}
protected override global::Windows.Foundation.Size MeasureOverride(global::Windows.Foundation.Size availableSize)
{
_textBlock.Measure(availableSize);
// This deliberately does something wrong so we can demo fixing it
Rect bounds = ApplicationView.GetForCurrentView().VisibleBounds;
double scaleFactor = DisplayInformation.GetForCurrentView().RawPixelsPerViewPixel;
var size = new Size(bounds.Width * scaleFactor, bounds.Height * scaleFactor);
return(new global::Windows.Foundation.Size(size.Width, _textBlock.DesiredSize.Height));
}
protected override global::Windows.Foundation.Size MeasureOverride(global::Windows.Foundation.Size availableSize)
{
if (Element == null)
{
return(new global::Windows.Foundation.Size(0, 0));
}
double width = Math.Max(0, Element.Width);
double height = Math.Max(0, Element.Height);
var result = new global::Windows.Foundation.Size(width, height);
Control?.Measure(result);
return(result);
}
protected override global::Windows.Foundation.Size ArrangeOverride(global::Windows.Foundation.Size finalSize)
{
if (Element == null)
{
return(finalSize);
}
Element.IsInNativeLayout = true;
Control?.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
Element.IsInNativeLayout = false;
return(finalSize);
}
public virtual SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
if (Children.Count == 0 || Control == null)
{
return(new SizeRequest());
}
var constraint = new global::Windows.Foundation.Size(widthConstraint, heightConstraint);
TNativeElement child = Control;
child.Measure(constraint);
var result = new Size(Math.Ceiling(child.DesiredSize.Width), Math.Ceiling(child.DesiredSize.Height));
return(new SizeRequest(result));
}
protected override global::Windows.Foundation.Size ArrangeOverride(global::Windows.Foundation.Size finalSize)
{
_view.IsInNativeLayout = true;
Layout.LayoutChildIntoBoundingRegion(_view, new Rectangle(0, 0, finalSize.Width, finalSize.Height));
if (_view.Width <= 0 || _view.Height <= 0)
{
// Hide Panel when size _view is empty.
// It is necessary that this element does not overlap other elements when it should be hidden.
Opacity = 0;
}
else
{
Opacity = 1;
FrameworkElement?.Arrange(new Rect(_view.X, _view.Y, _view.Width, _view.Height));
}
_view.IsInNativeLayout = false;
return(finalSize);
}
protected override global::Windows.Foundation.Size ArrangeOverride(global::Windows.Foundation.Size finalSize)
{
_textBlock.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
return(finalSize);
}