ImageFilterModifier class

Applies an ImageFilter to its child.

An image filter will always apply its filter operation to the child widget, even if said filter is conceptually a "no-op", such as an ImageFilter.blur with a radius of 0 or an ImageFilter.matrix with an identity matrix. Setting ImageFiltered.enabled to false is a more efficient manner of disabling an image filter.

The framework does not attempt to optimize out "no-op" filters because it cannot tell the difference between an intentional no-op and a filter that is only incidentally a no-op. Consider an ImageFilter.matrix that is animated and happens to pass through the identity matrix. If the framework identified it as a no-op it would drop and then recreate the layer during the animation which would be more expensive than keeping it around.

See also:

• BackdropFilter, which applies an ImageFilter to everything beneath its child.
• ColorFiltered, which applies a ColorFilter to its child.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• ImageFilterModifier

Available extensions

• ModifierTransformer

Constructors

ImageFilterModifier({Key? key, Widget? child, required ImageFilter imageFilter, bool enabled = true})

Creates a widget that applies an ImageFilter to its child.

const

Properties

enabled → bool

Whether or not to apply the image filter opation to the child of this widget.

final

hashCode → int

The hash code for this object.

no setter, inherited

imageFilter → ImageFilter

The image filter to apply to the child of this widget.

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

inherited

buildWithChild(BuildContext context, Widget? child) → Widget

A build method that receives an extra child parameter.

override

createElement() → SingleChildStatelessElement

Create a SingleChildStatelessElement

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}) → 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