protected override void OnLayout(LayoutBuilder layout)
{
layout.View(ImageView)
.Top(0).Bottom(0).Left(0).Right(0);
if (Indicator != null)
{
layout.View(Indicator)
.CenterVertically()
.CenterHorizontally()
.AutoSize();
}
}
private LayoutViewResult LayoutView(PointF layoutOrigin, ref LayoutParams layoutParams)
{
var freeSpaceSize = new SizeF(Math.Max(0, _layoutSpaceBounds.Right - layoutOrigin.X),
Math.Max(0, _layoutSpaceBounds.Bottom - layoutOrigin.Y));
//Free space available a view in layout coordinates
var freeSpace = new RectangleF(layoutOrigin, freeSpaceSize);
//Free space available for a view in view coordinates
var viewFreeSpace = _layoutToView.Transform(freeSpace);
//Area which view wants to occupy in view coordinates
var viewBox = _layoutBuilder.View(layoutParams.View, viewFreeSpace);
_views.Add(viewBox);
layoutParams.Layout(viewBox);
//Area which view wants to occupy in layout coordinates
var layoutFrame = _viewToLayout.Transform(viewBox.Frame());
//Space required for view starting from layout origin in layout coordinates
var viewFrame = new RectangleF(layoutOrigin, new SizeF(layoutFrame.Right - layoutOrigin.X, layoutFrame.Bottom - layoutOrigin.Y));
var newLayoutOrigin = new PointF(viewFrame.Right + LayoutStep, viewFrame.Top);
return(new LayoutViewResult()
{
ViewLayoutBox = viewBox,
NewLayoutOrigin = newLayoutOrigin,
LayoutViewFrame = viewFrame
});
}
public static void DistributeVertically(this LayoutBuilder layout, RectangleF bounds,
params PlatformView[] views)
{
var viewBoxes = views.Select(x => layout.View(x)).ToArray();
var totalWidth = viewBoxes.Sum(x => x.Height);
if (totalWidth > bounds.Height || views.Length < 2)
{
return;
}
var dx = (bounds.Height - totalWidth) / (views.Length - 1);
var xCoord = 0f;
foreach (var v in viewBoxes)
{
v.Top(xCoord).Height(v.Height);
xCoord += (dx + v.Height);
}
}