private void processComponent(IElement element, LayoutCalculationContext context, ref AbsolutePoint currentOffset)
{
if (element is ILayoutBox layoutComponent)
{
validateMeasures(layoutComponent);
var parentLayoutBox = context.GetLayoutBoxInformation(element.Parent);
var layoutBox = calculateRelativeLayoutBoxes(layoutComponent, parentLayoutBox.AbsolutePaddingBox.Size);
// Convert relative location to absolute location
layoutBox.AbsoluteMarginBox.Offset(parentLayoutBox.AbsolutePaddingBox.Location);
layoutBox.AbsoluteBox.Offset(parentLayoutBox.AbsolutePaddingBox.Location);
layoutBox.AbsolutePaddingBox.Offset(parentLayoutBox.AbsolutePaddingBox.Location);
// Adjust location because of previous siblings
layoutBox.AbsoluteMarginBox.Offset(currentOffset);
layoutBox.AbsoluteBox.Offset(currentOffset);
layoutBox.AbsolutePaddingBox.Offset(currentOffset);
// Add this component to offset too to adjust next siblings (based on margin box).
if (parentLayoutBox.LayoutDirection == LayoutDirection.Vertical)
{
currentOffset.Y += layoutBox.AbsoluteMarginBox.Size.Height;
}
if (parentLayoutBox.LayoutDirection == LayoutDirection.Horizontal)
{
currentOffset.X += layoutBox.AbsoluteMarginBox.Size.Width;
}
context.SetLayoutBoxInformation(element, layoutBox);
}
else
{
// If this is not an ILayoutBox (layoutable) component, set it's client from it's parent.
context.SetLayoutBoxInformation(element, context.GetLayoutBoxInformation(element.Parent));
}
var childrenOffset = new AbsolutePoint();
// Continue with the children
foreach (var child in element.Children)
{
processComponent(child, context, ref childrenOffset);
}
}
public LayoutCalculationResult ProcessLayout(AbsoluteSize clientSize, IElementTree componentTree)
{
//componentTree.Restructure();
var context = new LayoutCalculationContext();
var rootComponentBox = context.GetLayoutBoxInformation(componentTree.Owner);
rootComponentBox.AbsoluteBox = new AbsoluteRectangle(0, 0, clientSize.Width, clientSize.Height);
rootComponentBox.AbsoluteMarginBox = rootComponentBox.AbsoluteBox;
rootComponentBox.AbsolutePaddingBox = rootComponentBox.AbsoluteBox;
rootComponentBox.LayoutDirection = LayoutDirection.Vertical;
var childrenOffset = new AbsolutePoint();
foreach (var component in componentTree.Owner.ElementTree.Children)
{
processComponent(component, context, ref childrenOffset);
}
var filteredBoxes = context.LayoutBoxes.ToDictionary(x => (ILayoutBox)x.Key, x => x.Value);
return(new LayoutCalculationResult(filteredBoxes));
}
public void DrawText(AbsolutePoint location, Typeface typeface, string text, IBrush brush)
{
var paint = typeface.ToSKPaint(brush);
canvas.DrawText(text, location.X, location.Y, paint);
}
