RawMagnifier class Null safety

A common base class for magnifiers.

This sample demonstrates what a magnifier is, and how it can be used.
link

To create a local project with this code sample, run:
flutter create --sample=widgets.RawMagnifier.1 mysample

This magnifying glass is useful for scenarios on mobile devices where the user's finger may be covering part of the screen where a granular action is being performed, such as navigating a small cursor with a drag gesture, on an image or text.

A magnifier can be conveniently managed by MagnifierController, which handles showing and hiding the magnifier, with an optional entry / exit animation.

See:

Inheritance

Constructors

RawMagnifier({Key? key, Widget? child, MagnifierDecoration decoration = const MagnifierDecoration(), Offset focalPointOffset = Offset.zero, double magnificationScale = 1, required Size size})
Constructs a RawMagnifier.
const

Properties

child Widget?
An optional widget to position inside the len of the RawMagnifier.
final
decoration MagnifierDecoration
This magnifier's decoration.
final
focalPointOffset Offset
The offset of the magnifier from RawMagnifier's center.
final
hashCode int
The hash code for this object.
read-onlyinherited
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
magnificationScale double
How "zoomed in" the magnification subject is in the lens.
final
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
size Size
The size of the magnifier.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
inherited
toStringShort() String
A short, textual description of this widget.
inherited

Operators

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