public static LayoutNode Spacer(Point size)
{
return(new LayoutNode(false, LayoutNodeName.Nameless, LayoutSize.Pixels(size),
/*Ignored params:*/
Orientation.Horizontal,
LayoutStyle.Empty,
null));
}
public static LayoutNode NamelessLeaf(LayoutSize size)
{
return(new LayoutNode(true, LayoutNodeName.Nameless, size,
/*Ignored params:*/
Orientation.Horizontal,
LayoutStyle.Empty,
null));
}
public static LayoutNode Leaf(string name, LayoutSize size)
{
return(new LayoutNode(true, name, size,
/*Ignored params:*/
Orientation.Horizontal,
LayoutStyle.Empty,
null));
}
public void ConsumeInstruction(FlowLayoutInstruction instruction)
{
if (instruction == FlowLayoutInstruction.Linebreak)
{
if (HasRoomForAnotherRow(LayoutNode.NamelessLeaf(LayoutSize.Pixels(0, 0))))
{
AddNewRow();
}
}
}
public static RawLayout OrientedParent(Orientation orientation, string name, LayoutSize size, LayoutStyle style, params LayoutNode[] children)
{
if (orientation == Orientation.Horizontal)
{
return(HorizontalParent(name, size, style, children));
}
else
{
return(VerticalParent(name, size, style, children));
}
}
internal RawFlowLayout(string name, LayoutSize size, LayoutStyle workableAreaStyle, Orientation orientation, FlowLayoutStyle style, FlowLayoutRows rows) : base(
LayoutNode.OneOffParent(name, size, workableAreaStyle,
LayoutNode.OrientedParent(orientation.Opposite(), "rows", LayoutSize.Pixels(rows.UsedSize), new LayoutStyle(padding: style.PaddingBetweenRows),
rows.GetLayoutNodesOfEachRow()
)
))
{
this.orientation = orientation;
this.rowNodes = rows.GetLayoutNodesOfEachRow();
this.rowUsedSpace = rows.GetUsedSpaceOfEachRow();
}
/// <summary>
/// This is only called by the static constructor methods. Most constructors ignore everything past "size"
/// </summary>
private LayoutNode(bool isBakable, LayoutNodeName name, LayoutSize size, Orientation orientation, LayoutStyle style, LayoutNode[] children)
{
IsBakable = isBakable;
Name = name;
Size = size;
Orientation = orientation;
if (children != null)
{
Children = children;
}
Style = style;
}
private static LayoutSize FlexParentSize(Orientation orientation, FlexLayoutStyle style, LayoutNode[] children)
{
var totalPadding = (children.Length - 1) * style.InnerStyle.Padding;
var totalAlongMargin = style.InnerStyle.Margin.AxisValue(orientation.ToAxis()) * 2;
var totalPerpendicularMargin = style.InnerStyle.Margin.AxisValue(orientation.Opposite().ToAxis()) * 2;
var measuredAlongSize = 0;
var largestPerpendicularSize = 0;
foreach (var child in children)
{
measuredAlongSize += child.Size.GetValueFromOrientation(orientation).ActualSize;
largestPerpendicularSize = Math.Max(largestPerpendicularSize, child.Size.GetValueFromOrientation(orientation.Opposite()).ActualSize);
}
var alongSize = measuredAlongSize + totalAlongMargin + totalPadding;
var perpendicularSize = largestPerpendicularSize + totalPerpendicularMargin;
if (style.MinAlongSize.HasValue)
{
alongSize = Math.Max(alongSize, style.MinAlongSize.Value);
}
if (style.MinPerpendicularSize.HasValue)
{
perpendicularSize = Math.Max(perpendicularSize, style.MinPerpendicularSize.Value);
}
if (orientation == Orientation.Horizontal)
{
return(LayoutSize.Pixels(alongSize, perpendicularSize));
}
else
{
return(LayoutSize.Pixels(perpendicularSize, alongSize));
}
}
private static RawFlowLayout OrientedFlowParent(Orientation orientation, string name, LayoutSize size, FlowLayoutStyle style, params LayoutNodeOrInstruction[] children)
{
var workableAreaStyle = new LayoutStyle(margin: style.Margin, alignment: style.Alignment);
var workableArea = LayoutNode.NamelessOneOffParent(size, workableAreaStyle, LayoutNode.Leaf("workableArea", LayoutSize.StretchedBoth())).Bake().GetNode("workableArea");
var rows = new FlowLayoutRows(workableArea.Size, style, orientation);
foreach (var item in children)
{
if (item.IsLayoutNode)
{
if (!rows.CanFitItemPerpendicular(item))
{
break;
}
if (rows.CanFitItemAlongCurrentRow(item))
{
rows.AddItemToCurrentRow(item);
}
else
{
rows.CreateNextRowAndAdd(item);
}
}
else if (item.IsInstruction)
{
rows.ConsumeInstruction(item);
}
}
return(new RawFlowLayout(name, size, workableAreaStyle, orientation, style, rows));
}
public static RawFlowLayout VerticalFlowParent(string name, LayoutSize size, FlowLayoutStyle style, params LayoutNodeOrInstruction[] children)
{
return(OrientedFlowParent(Orientation.Vertical, name, size, style, children));
}
public static RawLayout OneOffParent(string name, LayoutSize size, LayoutStyle style, LayoutNode child)
{
// Horizontal/Vertical does not matter here
return(HorizontalParent(name, size, style, child));
}
public static RawLayout NamelessOneOffParent(LayoutSize size, LayoutStyle style, LayoutNode child)
{
// Horizontal/Vertical does not matter here
return(HorizontalParent("root", size, style, child));
}
public static LayoutNode NamelessHorizontalParent(LayoutSize size, LayoutStyle style, params LayoutNode[] children)
{
return(new RawLayout(new LayoutNode(true, LayoutNodeName.Nameless, size, Orientation.Horizontal, style, children)));
}
public static LayoutNode StretchedSpacer()
{
return(new LayoutNode(false, LayoutNodeName.Nameless, LayoutSize.StretchedBoth(), Orientation.Horizontal, LayoutStyle.Empty, null));
}
/// <summary>
/// Returns a LayoutNode just like this one with the same children, only resized
/// </summary>
/// <param name="newSize"></param>
/// <returns></returns>
public RawLayout GetResized(Point newSize)
{
return(new RawLayout(new LayoutNode(IsBakable, Name, LayoutSize.Pixels(newSize.X, newSize.Y), Orientation, Style, Children)));
}
public static RawLayout HorizontalParent(string name, LayoutSize size, LayoutStyle style, params LayoutNode[] children)
{
return(new RawLayout(new LayoutNode(true, name, size, Orientation.Horizontal, style, children)));
}
public LayoutNode GetLayoutNode(string rowNodeName)
{
var size = Orientation.GetPointFromAlongPerpendicular(AvailableAlongSize, UsedPerpendicularSize);
return(LayoutNode.OrientedParent(Orientation, rowNodeName, LayoutSize.Pixels(size), RowStyle, Content.ToArray()));
}
public Point GetMeasuredSize(LayoutSize size)
{
return(new Point(MeasureEdge(size.Width), MeasureEdge(size.Height)));
}