Initial commit

lib/layout/abstractCenteredColumn.dart

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+import 'package:flutter/material.dart';
+
+abstract class AbstractCenteredColumn extends Column {
+  AbstractCenteredColumn({
+    Key key,
+    MainAxisAlignment mainAxisAlignment,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: mainAxisAlignment,
+          mainAxisSize: MainAxisSize.max,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          textDirection: textDirection,
+          verticalDirection: VerticalDirection.down,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/abstractCenteredRow.dart

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+import 'package:flutter/material.dart';
+
+abstract class AbstractCenteredRow extends Row {
+  AbstractCenteredRow({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    mainAxisAlignment,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: mainAxisAlignment,
+          mainAxisSize: MainAxisSize.max,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          textDirection: textDirection,
+          verticalDirection: VerticalDirection.down,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredColumn.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredColumn.dart';
+
+class CenteredColumn extends AbstractCenteredColumn {
+  CenteredColumn({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.center,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredMaxWidget.dart

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+import 'package:flutter/material.dart';
+import 'centeredColumn.dart';
+import 'centeredRow.dart';
+
+class CenteredMaxWidget extends CenteredColumn {
+  CenteredMaxWidget({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+    children: <Widget>[new CenteredRow(children: children)],
+          key: key,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredRow.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredRow.dart';
+
+class CenteredRow extends AbstractCenteredRow {
+  CenteredRow({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.center,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceAroundColumn.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredColumn.dart';
+
+class CenteredSpaceAroundColumn extends AbstractCenteredColumn {
+  CenteredSpaceAroundColumn({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceAround,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceAroundRow.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredRow.dart';
+
+class CenteredSpacedAroundRow extends AbstractCenteredRow {
+  CenteredSpacedAroundRow({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceAround,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceBetweenColumn.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredColumn.dart';
+
+class CenteredSpaceBetweenColumn extends AbstractCenteredColumn {
+  CenteredSpaceBetweenColumn({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceBetweenRow.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredRow.dart';
+
+class CenteredSpacedBetweenRow extends AbstractCenteredRow {
+  CenteredSpacedBetweenRow({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceEvenlyColumn.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredColumn.dart';
+
+class CenteredSpaceEvenlyColumn extends AbstractCenteredColumn {
+  CenteredSpaceEvenlyColumn({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}

lib/layout/centeredSpaceEvenlyRow.dart

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+import 'package:flutter/material.dart';
+import 'abstractCenteredRow.dart';
+
+class CenteredSpacedEvenlyRow extends AbstractCenteredRow {
+  CenteredSpacedEvenlyRow({
+    Key key,
+    TextDirection textDirection,
+    TextBaseline textBaseline,
+    List<Widget> children: const <Widget>[],
+  }) : super(
+          children: children,
+          key: key,
+          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+          textDirection: textDirection,
+          textBaseline: textBaseline,
+        );
+}