public LayoutParams(PlatformView view, Action <IViewLayoutBox> layoutAction)
{
Assert.Argument(view, nameof(view)).NotNull();
Assert.Argument(layoutAction, nameof(layoutAction)).NotNull();
_view = view;
_layout = layoutAction ?? DefaultLayout;
}
public void RemoveSubview(PlatformView view)
{
if (view != null)
{
view.AsView().RemoveFromSuperview();
Views.Remove(view);
}
}
public PlatformView AddSubview(PlatformView view)
{
Views.Add(view);
#if __ANDROID__
view.Id = Views.Count;
#endif
Parent.AsView().AddSubview(view);
return(view);
}
public static SizeF PreferredSize(this PlatformView v, SizeF size)
{
#if __IOS__
return((SizeF)v.SizeThatFits((CGSize)size));
#elif __ANDROID__
var ws = MeasureSpec.MakeMeasureSpec((int)Math.Round(size.Width), MeasureSpecMode.AtMost);
var hs = MeasureSpec.MakeMeasureSpec((int)Math.Round(size.Height), MeasureSpecMode.Unspecified);
v.Measure(ws, hs);
return(new SizeF(v.MeasuredWidth, v.MeasuredHeight));
#else
return(v.Frame.Size);
#endif
}
/// <summary>
/// Build <see cref="IViewLayoutBox"/>.
/// </summary>
/// <param name="v">View geometry (usually cross platform View wrapper)</param>
/// <param name="outerBounds">Optional outer bounds to override this builder <see cref="OuterBounds"/>.</param>
/// <param name="units">Optional units to override this builder <see cref="Units"/>.</param>
public IViewLayoutBox View(PlatformView v, RectangleF?outerBounds = null, IUnit units = null)
{
var layoutBounds = outerBounds ?? PaddedOuterBounds;
ViewLayoutBox box;
if (_boxes.TryGetValue(v, out box))
{
if (box.OuterBounds != layoutBounds)
{
_boxes.Remove(v);
box = null;
}
}
if (box == null)
{
box = new ViewLayoutBox(v, layoutBounds);
}
_boxes[v] = box;
return(box);
}
public EventHandlerSource <T> ClickTarget()
{
return(PlatformView.ClickTarget());
}
public ViewLayoutBox(PlatformView v, RectangleF r) : base(r)
{
View = v;
}
/// <summary>
/// Build <see cref="IViewLayoutBox"/>.
/// </summary>
/// <param name="v">View geometry (usually cross platform View wrapper)</param>
/// <param name="outerBounds">Optional outer bounds to override this builder <see cref="OuterBounds"/>.</param>
public IViewLayoutBox View(PlatformView v, ILayoutBox outerBounds)
{
return(View(v, outerBounds.Frame()));
}
public IViewLayoutBox Add(PlatformView v)
{
return(Add(new LayoutParams(v)));
}
public IViewLayoutBox Add(PlatformView v, Action <IViewLayoutBox> layout)
{
return(Add(new LayoutParams(v, layout)));
}
public LayoutParams(PlatformView view) : this(view, DefaultLayout)
{
}
