@Operator
This add(Obj val, Str? name := null)

Add a slot. If name is null one is auto-generated otherwise the name must be unique.

This addNotNull(Obj? val, Str? name := null)

Add a slot if value is not null. If name is null one is auto-generated.

virtual Comp? child(Str name, Bool checked := true)

Lookup a child component by name

Str dis()

Return display string for this component

Void each(|Obj,Str| f)

Iterate slot name/value pairs using same semantics as get.

Void eachChild(|Comp,Str| f)

Iterate children components in the tree structure

Obj? eachWhile(|Obj,Str->Obj?| f)

Iterate name/value pairs until callback returns non-null

@Operator
Obj? get(Str name)

Get the given slot value or null if slot name not defined.

Bool has(Str name)

Return true if this component has a slot by given name.

Bool hasChild(Str name)

Check if a child component is mapped by the given name

Ref id()

Return id that uniquely identifies this component within its space.

Bool isAbove(Comp child)

Is this is an ancestor in the tree of the given component. If the given component is this, then return true.

Bool isBelow(Comp parent)

Is this component is a descendant in the tree of the given component. If the given component is this, then return true.

Bool isMounted()

Return if this component is mounted into a component space

Links links()

Gets links slot as dict of incoming component links

Bool missing(Str name)

Return true if the component does not have a slot by given name.

Str name()

Slot name under parent or "" if parent is null

virtual Void onChange(Str name, Obj? newVal)

Callback when a slot is modified on this instance. Value is null if slot removed.

virtual Void onExecute()

Callback to recompute component state. This is always called within a CompContext.

virtual Duration? onExecuteFreq()

How often should this component have its onExecute callback invoked. Return null if this component has no time based computation.

virtual Comp? parent()

Parent component or null if root/unmounted

This remove(Str name)

Remove a slot by name. Do nothing is name isn't mapped.

This reorder(Str[] names)

Reorder the slots. The given list of names must match the existing slot names. Slots defined statically by the spec cannot be reordered and will have indetermine behavior if they are not included in the their original order (in the future this may raise an exception).

@Operator
This set(Str name, Obj? val)

Set a slot by name. If val is null, then this is a convenience for remove.

Spec spec()

Xeto type for this component

virtual override Str toStr()

Return debug string

override Obj? trap(Str name, Obj?[]? args := null)

Get or set the slot mapped by the given name.