SafeLayoutElement class
The element managing the lifecycle, constraints, and painting of SafeLayout.
- Inheritance
- Available extensions
Constructors
- SafeLayoutElement(SafeLayout widget)
- Creates a SafeLayoutElement.
Properties
- childElement ↔ Element?
-
Element for the main child widget.
getter/setter pair
- constraints → BoxConstraints?
-
The cached constraints from the last layout pass.
no setterinherited
- depth ↔ int
-
The depth of this element in the widget tree.
getter/setter pairinherited
- fallbackElement ↔ Element?
-
Element for the fallback widget.
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setterinherited
- isDirty ↔ bool
-
Undocumented public member.
getter/setter pairinherited
- layoutTraceId → int
-
Cached tracer ID for layout of this element.
no setterinherited
- mounted → bool
-
Whether this element is currently mounted in the tree.
no setterinherited
- owner ↔ BuildOwner?
-
The BuildOwner managing this element, resolving up the parent chain.
getter/setter pairinherited
- paintTraceId → int
-
Cached tracer ID for painting this element.
no setterinherited
-
paintTraceMetadata
→ Map<
String, String> ? -
Custom metadata for paint tracing.
no setterinherited
- parent ↔ Element?
-
The parent element in the widget tree.
getter/setter pairinherited
- rebuildTraceId → int
-
Cached tracer ID for rebuilding this element.
no setterinherited
- relativeOffset ↔ Offset
-
The cached local position assigned by the parent during layout.
getter/setter pairinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- size → Size
-
The resolved size of the element from the last layout pass.
no setterinherited
- treeDepth ↔ int
-
Undocumented public member.
getter/setter pairinherited
- useFallback ↔ bool
-
Whether the constraints are currently violated, displaying the fallback widget.
getter/setter pair
- widget ↔ Widget
-
The widget that this element represents.
getter/setter pairinherited
Methods
-
dependOnInheritedWidgetOfExactType<
T extends InheritedWidget> () → T? -
Obtains the nearest inherited widget of the given type
T.inherited -
getIntrinsicHeight(
int width) → int -
Returns the intrinsic height of this element.
override
-
getIntrinsicWidth(
int height) → int -
Returns the intrinsic width of this element.
override
-
hitTest(
Point< int> globalPosition, [Offset parentOffset = Offset.zero]) → List<Element> -
Available on Element, provided by the HitTestExtension extension
Recursively finds all elements containing the given global coordinate. -
layout(
BoxConstraints constraints) → Size -
Calculates the size of the element based on the given constraints.
inherited
-
markNeedsBuild(
) → void -
Marks this element as needing a build.
inherited
-
mount(
Element? parent) → void -
Adds this element to the tree as a child of
parent.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
paint(
Buffer buffer, Offset offset) → void -
Paints the element and records tracing metrics.
inherited
-
performLayout(
BoxConstraints constraints) → Size -
Hook for subclasses to perform layout within the given constraints.
override
-
performPaint(
Buffer buffer, Offset offset) → void -
Hook for subclasses to implement actual painting.
override
-
performRebuild(
) → void -
Performs the actual rebuild and clears the dirty flag.
inherited
-
reassemble(
) → void -
Called during hot reload to invalidate the element and trigger a rebuild.
inherited
-
rebuild(
) → void -
Rebuilds the element.
override
-
toString(
) → String -
A string representation of this object.
inherited
-
unmount(
) → void -
Removes this element from the tree.
override
-
update(
Widget newWidget) → void -
Updates this element to use a new Widget configuration.
override
-
visitChildren(
void visitor(Element child)) → void -
Invokes
visitoron each child element of this node.override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited