Theme class Null safety

Applies a theme to descendant widgets.

A theme describes the colors and typographic choices of an application.

Descendant widgets obtain the current theme's ThemeData object using Theme.of. When a widget uses Theme.of, it is automatically rebuilt if the theme later changes, so that the changes can be applied.

The Theme widget implies an IconTheme widget, set to the value of the ThemeData.iconTheme of the data for the Theme.

See also:

Inheritance

Constructors

Theme({Key? key, required ThemeData data, required Widget child})
Applies the given theme data to child.
const

Properties

child → Widget
The widget below this widget in the tree.
final
data → ThemeData
Specifies the color and typography values for descendant widgets.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

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.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
override
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.
nonVirtual">@nonVirtualinherited

Static Methods

of(BuildContext context) → ThemeData
The data from the closest Theme instance that encloses the given context.