ImageFiltered 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:

Inheritance
Annotations

Constructors

ImageFiltered.new({Key? key, required ImageFilter imageFilter, Widget? child, bool enabled = true})
Creates a widget that applies an ImageFilter to its child.
const

Properties

child → Widget?
The widget below this widget in the tree.
finalinherited
enabled → bool
Whether or not to apply the image filter operation to the child of this widget.
final
hashCode → int
The hash code for this object.
no setterinherited
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.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → SingleChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderObject
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
override
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.
override
didUnmountRenderObject(covariant RenderObject renderObject) → void
This method is called when a RenderObject that was previously associated with this widget is removed from the render tree. The provided RenderObject will be of the same type as the one created by this widget's createRenderObject method.
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
updateRenderObject(BuildContext context, covariant RenderObject renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

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