LayoutBuilder class Null safety

Builds a widget tree that can depend on the parent widget's size.

Inheritance

Constructors

LayoutBuilder({required LayoutWidgetBuilder builder})
Creates a widget that defers its building until layout.

Properties

box PdfRect?
The bounding box of this widget, calculated at layout time
read / write, inherited
builder LayoutWidgetBuilder
Called at layout time to construct the widget tree.
final
canSpan bool
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
hasMoreWidgets bool
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

build(Context context) Widget
override
debugPaint(Context context) → void
@protected, inherited
layout(Context context, BoxConstraints constraints, {bool parentUsesSize = false}) → void
First widget pass to calculate the children layout and bounding box
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
paint(Context context) → void
Draw itself and its children, according to the calculated box.offset
inherited
restoreContext(covariant WidgetContext context) → void
Apply the context for next layout
inherited
saveContext() WidgetContext
Get unmodified mutable context object
inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited