ThemeExtension<T extends ThemeExtension<T> > class
Null safety
An interface that defines custom additions to a ThemeData object.
Typically used for custom colors. To use, subclass ThemeExtension, define a number of fields (e.g. Colors), and implement the copyWith and lerp methods. The latter will ensure smooth transitions of properties when switching themes.
This sample shows how to create and use a subclass of ThemeExtension that
defines two colors.
To create a local project with this code sample, run:
flutter create --sample=material.ThemeExtension.1 mysample
flutter create --sample=material.ThemeExtension.1 mysample
Constructors
- ThemeExtension()
-
Enable const constructor for subclasses.
const
Properties
Methods
-
copyWith(
) → ThemeExtension< T> - Creates a copy of this theme extension with the given fields replaced by the non-null parameter values.
-
lerp(
ThemeExtension< T> ? other, double t) → ThemeExtension<T> - Linearly interpolate with another ThemeExtension object.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited