BuildScope class final
A class that determines the scope of a BuildOwner.buildScope operation.
The BuildOwner.buildScope method rebuilds all dirty Elements who share
the same Element.buildScope as its context argument, and skips those
with a different Element.buildScope.
Elements by default have the same buildScope as their parents. Special
Elements may override Element.buildScope to create an isolated build scope
for its descendants. The LayoutBuilder widget, for example, establishes its
own BuildScope such that no descendant Elements may rebuild prematurely
until the incoming constraints are known.
Constructors
- BuildScope({VoidCallback? scheduleRebuild})
-
Creates a BuildScope with an optional
scheduleRebuildcallback.
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- scheduleRebuild → VoidCallback?
-
An optional VoidCallback that will be called when Elements in this
BuildScope are marked as dirty for the first time.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited