ZetaSpacing Usage

To import ZetaSpacing into a Dart file:

import 'package:zeta_flutter/zeta_flutter.dart';

Example

import 'package:zeta_flutter/zeta_flutter.dart';

class ZetaSpacingExample extends StatelessWidget{
  const ZetaSpacingExample({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ZetaSpacing(...);
  }
}

Setup

To ensure all components work as intended, applications should have ZetaTheme.zeta applied at their top level; typically within MaterialApp or wrapping its equivalent:

import 'package:flutter/material.dart';
import 'package:zeta_flutter/src/theme/theme.dart';

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ZetaTheme.zeta,
      builder: (context, child) => ...,
    );
  }
}

or

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:zeta_flutter/src/theme/theme.dart';

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return Theme(
      data: ZetaTheme.zeta,
      child: CupertinoApp(
        builder: (context, child) => ...,
      ),
    );
  }
}

ZetaSpacing

ZetaSpacing provides four options for spacing

• square - applies inset to all 4 sides equally.
• squish - applies inset to top and bottom only.
• inline - applies inset to start and end only.
• inlineStart - applies inset to start only. For LTR locales this is the left, for RTL locales this is the right.
• inlineEnd - applies inset to end only. For LTR locales this is the right, for RTL locales this is the left.
• stack - applies inset to bottom only.

These spacings should be applied with the following doubles:

• x0 - 0
• x1 - 4 - also xxs
• x2 - 8 - also xs
• x3 - 12 - also s
• x4 - 16 - also b
• x5 - 20
• x6 - 24 - also m
• x7 - 28
• x8 - 32 - also l
• x9 - 36
• x10 - 40
• x11 - 44
• x12 - 48
• x13 - 52
• x14 - 58
• x16 - 64 - also xl
• x20 - 80 - also xxl
• x24 - 96 - also xxxl

Spacing components can be used in multiple ways:

ZetaSpacing() widget with named constructors.

const ZetaSpacing.square(
   Text('Example'),
   size: Dimensions.x1,
),
const ZetaSpacing.squish(
  Text('Example'),
  size: Dimensions.x1,
),
const ZetaSpacing.stack(
  Text('Example'),
  size: Dimensions.x1,
)
const ZetaSpacing.inline(
  Text('Example'),
  size: Dimensions.x1,
)

This is the preferred way to use ZetaSpacing. Having a const, named constructor makes the intuitive and efficient.

• Const constructor
• Can wrap any Widget.
• Padding inset around widget.

ZetaSpacing() widget.

const ZetaSpacing(
  Text('Example'),
  size: Dimensions.x1,
  type: ZetaSpacingType.square,
),
const ZetaSpacing(
  Text('Example'),
  size: Dimensions.x1,
  type: ZetaSpacingType.squish,
),
const ZetaSpacing(
  Text('Example'),
  size: Dimensions.x1,
  type: ZetaSpacingType.stack,
),
const ZetaSpacing(
  Text('Example'),
  size: Dimensions.x1,
  type: ZetaSpacingType.inline,
),

This method is less intuitive than using the named constructor, although it does still provide a const constructor for efficiency.

• Having a const constructor makes this a preferred approach to spacing.
• Can wrap any Widget.
• Padding inset around widget.

SpacingSize extension on double.

Container(
  padding: Dimensions.x1.square,
  margin: Dimensions.x10.squish,
  child: Text('Example'),
),
Container(
  padding: Dimensions.x1.stack,
  margin: Dimensions.x10.inline,
  child: Text('Example'),
),

• Should be used with defined sizes: x0, x1,… or xxs, xs,… (although can be used on any double).
• Can be used for either padding or margin.
• Can be wrapped around any Widget, or used as a parameter.

SpacingWidget extension on Widget.

Text('Example').square(Dimensions.x1),
Text('Example').squish(Dimensions.x1),
Text('Example').stack(Dimensions.x1),
Text('Example').inline(Dimensions.x1),
Text('Example').inlineStart(Dimensions.x1),
Text('Example').inlineEnd(Dimensions.x1),

• Should be used with defined sizes: x0, x1,… or xxs, xs,… (although can be used on any double).
• Padding inset around widget.
• Can be applied to any widget.