Spacing class
A ThemeExtension that exposes the design system's spacing scale.
Provides 16 named spacing steps — spacing_1 (2 dp) through spacing_16 (72 dp) — registered in ThemeData.extensions for both light and dark themes.
Access via ThemeData using the ThemeExtras extension:
Padding(
padding: EdgeInsets.all(context.theme.spacing_4),
child: child,
)
Do not instantiate this class directly in widget code. Always read it
through Theme.of(context) (or context.theme) so that theme overrides
and lerp animations are respected.
- Inheritance
-
- Object
- ThemeExtension<
Spacing> - Spacing
Constructors
- Spacing({double spacing_1 = 2, double spacing_2 = 4, double spacing_3 = 6, double spacing_4 = 8, double spacing_5 = 10, double spacing_6 = 12, double spacing_7 = 14, double spacing_8 = 16, double spacing_9 = 20, double spacing_10 = 24, double spacing_11 = 32, double spacing_12 = 40, double spacing_13 = 48, double spacing_14 = 56, double spacing_15 = 64, double spacing_16 = 72})
-
Creates a spacing scale with the given step values, in logical pixels.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- spacing_1 → double
-
2 logical pixels.
final
- spacing_10 → double
-
24 logical pixels.
final
- spacing_11 → double
-
32 logical pixels.
final
- spacing_12 → double
-
40 logical pixels.
final
- spacing_13 → double
-
48 logical pixels.
final
- spacing_14 → double
-
56 logical pixels.
final
- spacing_15 → double
-
64 logical pixels.
final
- spacing_16 → double
-
72 logical pixels.
final
- spacing_2 → double
-
4 logical pixels.
final
- spacing_3 → double
-
6 logical pixels.
final
- spacing_4 → double
-
8 logical pixels.
final
- spacing_5 → double
-
10 logical pixels.
final
- spacing_6 → double
-
12 logical pixels.
final
- spacing_7 → double
-
14 logical pixels.
final
- spacing_8 → double
-
16 logical pixels.
final
- spacing_9 → double
-
20 logical pixels.
final
- type → Object
-
The extension's type.
no setterinherited
Methods
-
copyWith(
{double? spacing_1, double? spacing_2, double? spacing_3, double? spacing_4, double? spacing_5, double? spacing_6, double? spacing_7, double? spacing_8, double? spacing_9, double? spacing_10, double? spacing_11, double? spacing_12, double? spacing_13, double? spacing_14, double? spacing_15, double? spacing_16}) → Spacing -
Creates a copy of this spacing scale with the given steps replaced.
override
-
lerp(
covariant ThemeExtension< Spacing> ? other, double t) → Spacing -
Linearly interpolates between this scale and
otherby factort.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited