protected override Foundation.Size MeasureOverride(Foundation.Size size)
{
var child = Content as UIElement;
if (child != null)
{
var slotSize = size;
if (VerticalScrollBarVisibility != ScrollBarVisibility.Disabled)
{
slotSize.Height = double.PositiveInfinity;
}
if (HorizontalScrollBarVisibility != ScrollBarVisibility.Disabled)
{
slotSize.Width = double.PositiveInfinity;
}
child.Measure(slotSize);
return(new Size(
Math.Min(size.Width, child.DesiredSize.Width),
Math.Min(size.Height, child.DesiredSize.Height)
));
}
return(new Foundation.Size(0, 0));
}
protected override Foundation.Size ApplyChildStretch(Foundation.Size childSize, Foundation.Size slotSize, ViewType viewType)
{
//Item views in a grid layout shouldn't be stretched
if (viewType == ViewType.Item)
{
return(childSize);
}
return(base.ApplyChildStretch(childSize, slotSize, viewType));
}
/// <summary>
/// Gets the AnchorPoint to be applied to the UIView's Layer,
/// considering both UIElement's RenderTransformOrigin and Transform's Center (CenterX/CenterY).
/// </summary>
private Foundation.Point GetAnchorPoint(Foundation.Size size)
{
if (size.Width == 0 || size.Height == 0)
{
return(Origin);
}
var center = GetCenter();
return(new Foundation.Point(
Origin.X + (center.X / size.Width),
Origin.Y + (center.Y / size.Height)
));
}
protected override Foundation.Size ArrangeOverride(Foundation.Size finalSize)
{
var child = Content as UIElement;
if (child != null)
{
var slotSize = finalSize;
var desiredChildSize = child.DesiredSize;
if (VerticalScrollBarVisibility != ScrollBarVisibility.Disabled)
{
slotSize.Height = Math.Max(desiredChildSize.Height, finalSize.Height);
}
if (HorizontalScrollBarVisibility != ScrollBarVisibility.Disabled)
{
slotSize.Width = Math.Max(desiredChildSize.Width, finalSize.Width);
}
child.Arrange(new Rect(new Point(0, 0), slotSize));
}
return(finalSize);
}
