Magnifier class
A Material-styled magnifying glass.
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.
This widget focuses on mimicking the style of the magnifier on material. For a widget that is focused on mimicking the behavior of a material magnifier, see TextMagnifier, which uses Magnifier.
The styles implemented in this widget were based on the Android 12 source code, where possible, and on eyeballing a Pixel 6 running Android 12 otherwise.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- Magnifier
Constructors
-
Magnifier({Key? key, Offset additionalFocalPointOffset = Offset.zero, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(_borderRadius)), Color filmColor = const Color.fromARGB(8, 158, 158, 158), List<
BoxShadow> shadows = const <BoxShadow>[BoxShadow(blurRadius: 1.5, offset: Offset(0.0, 2.0), spreadRadius: 0.75, color: Color.fromARGB(25, 0, 0, 0))], Clip clipBehavior = Clip.hardEdge, Size size = Magnifier.kDefaultMagnifierSize}) -
Creates a RawMagnifier in the Material style.
const
Properties
- additionalFocalPointOffset → Offset
-
Any additional offset the focal point requires to "point"
to the correct place.
final
- borderRadius → BorderRadius
-
The border radius for this magnifier.
final
- clipBehavior → Clip
-
Whether and how to clip the shadows that render inside the loupe.
final
- filmColor → Color
-
The color to tint the image in this Magnifier.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
shadows
→ List<
BoxShadow> -
A list of shadows cast by the Magnifier.
final
- size → Size
-
The Size of this 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 nonexistent 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, int wrapWidth = 65}) → 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
Constants
- kDefaultMagnifierSize → const Size
- The default size of this Magnifier.
- kStandardVerticalFocalPointShift → const double
- The vertical distance that the magnifier should be above the focal point.
