public static void ConstrainSize(this CElement element, double width, double height, ClStrength strength = null)
{
if (strength == null)
{
strength = ClStrength.Default;
}
element.AddConstraint(new ClLinearConstraint(element.width, toLinearExpression(width), strength));
element.AddConstraint(new ClLinearConstraint(element.height, toLinearExpression(height), strength));
}
public static void Center(this CElement parent, CElement child, EdgeInsets insets, ClStrength strength = null)
{
if (strength == null)
{
strength = ClStrength.Default;
}
parent.AddConstraint(parent.centerX ^ ((insets.Left - insets.Right) / 2) + child.centerX, strength);
parent.AddConstraint(parent.centerY ^ ((insets.Top - insets.Bottom) / 2) + child.centerY, strength);
}
public static void Center(this CElement parent, CElement child, ClStrength strength = null)
{
if (strength == null)
{
strength = ClStrength.Default;
}
parent.AddConstraint(parent.centerX ^ child.centerX, strength);
parent.AddConstraint(parent.centerY ^ child.centerY, strength);
}
public static void MakeSizeIntristic(this CElement element, EdgeInsets insets, ClStrength strength = null)
{
if (strength == null)
{
strength = ClStrength.Default;
}
element.AddConstraint(element.width ^ element.intrinsicWidth + insets.Width, strength);
element.AddConstraint(element.height ^ element.intrinsicHeight + insets.Height, strength);
}
public static void Embed(this CElement parent, CElement child, EdgeInsets insets, ClStrength strength = null)
{
if (strength == null)
{
strength = ClStrength.Default;
}
parent.AddConstraint(new ClLinearConstraint(parent.top, child.top - insets.Top, strength));
parent.AddConstraint(new ClLinearConstraint(parent.right, child.right + insets.Right, strength));
parent.AddConstraint(new ClLinearConstraint(parent.bottom, child.bottom + insets.Bottom, strength));
parent.AddConstraint(new ClLinearConstraint(parent.left, child.left - insets.Left, strength));
}
/// <summary>
/// Removes the subview
/// </summary>
/// <param name="element">children to remove</param>
public void RemoveElement(CElement element)
{
if (!elements.Remove(element))
{
throw new InvalidOperationException($"view {element} is not a subview of {this}");
}
List <ClConstraint> movedConstraints = ShearConstraints(element);
elements.Remove(element);
element.parent_ = null;
//Log.Message($"moved constraints:\n{string.Join("\n", movedConstraints)}");
foreach (var cn in movedConstraints)
{
element.AddConstraint(cn);
}
SetNeedsUpdateLayout();
}
private static void Stack(CElement parent, AnchorMapper mapper, StackOptions options, IEnumerable items)
{
ClLinearExpression trailing = mapper.Leading(parent) + mapper.GetLeadingExpression(options) * mapper.multipler;
bool isFirst = true;
foreach (var item in items)
{
CElement element = null;
ClLinearExpression size = null;
if (item is CElement)
{
element = item as CElement;
size = null;
}
else
{
var type = item.GetType();
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(ValueTuple <,>))
{
var maybeElement = type.GetField("Item1").GetValue(item);
var maybeVar = type.GetField("Item2").GetValue(item);
element = maybeElement as CElement;
size = toLinearExpression(maybeVar);
}
}
if (element != null)
{
var child = element;
if (!isFirst)
{
trailing = trailing + options.Spacing;
}
parent.AddConstraint(new ClLinearConstraint(trailing, new ClLinearExpression(mapper.Leading(child)), options.Strength));
trailing = new ClLinearExpression(mapper.Trailing(child));
if (size != null)
{
parent.AddConstraint(new ClLinearConstraint(mapper.Size(child), size, options.Strength));
}
else if (options.IntrinsicIfNotSet)
{
parent.AddConstraint(mapper.Size(child) ^ mapper.IntrinsicSize(child));
}
if (options.ConstrainSides)
{
parent.AddConstraints(options.Strength,
mapper.SideA(child) ^ mapper.SideA(parent) + mapper.GetSideAExpression(options) * mapper.multipler,
mapper.SideB(child) ^ mapper.SideB(parent) - mapper.GetSideBExpression(options) * mapper.multipler
);
}
if (options.AlignToCenter)
{
parent.AddConstraints(options.Strength,
mapper.Center(child) ^ mapper.Center(parent)
);
}
isFirst = false;
}
else
{
trailing = trailing + toLinearExpression(item) * mapper.multipler;
}
}
if (options.ConstrainEnd)
{
parent.AddConstraint(trailing + mapper.GetTrailingExpression(options) * mapper.multipler ^ mapper.Trailing(parent), options.Strength);
}
}