add buttons

lib/aku_ui.dart

@@ -1,7 +1,10 @@
 library aku_ui;
 
-/// A Calculator.
-class Calculator {
-  /// Returns [value] plus 1.
-  int addOne(int value) => value + 1;
-}
+//animated widgets
+export 'animated_widgets/animated.dart';
+
+//common widgets
+export 'common_widgets/aku_common_widgets.dart';
+
+//mixins
+export 'mixins/aku_mixins.dart';

lib/animated_widgets/animated.dart

@@ -0,0 +1,3 @@
+export 'animated_color_icon.dart';
+export 'animated_image_revert.dart';
+export 'animated_rotate.dart';

lib/animated_widgets/animated_color_icon.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+///动态变化图标
+///
+class AnimatedColorIcon extends ImplicitlyAnimatedWidget {
+  final IconData icon;
+  final Color color;
+  final double size;
+
+  AnimatedColorIcon({
+    this.icon,
+    this.color,
+    this.size,
+    Duration duration = const Duration(milliseconds: 300),
+    Curve curve = Curves.easeInOutCubic,
+  }) : super(
+          duration: duration,
+          curve: curve,
+        );
+  @override
+  ImplicitlyAnimatedWidgetState<ImplicitlyAnimatedWidget> createState() =>
+      _AniamtedColorIconState();
+}
+
+class _AniamtedColorIconState
+    extends AnimatedWidgetBaseState<AnimatedColorIcon> {
+  ColorTween _colorTween;
+  @override
+  Widget build(BuildContext context) {
+    return Icon(
+      widget.icon,
+      color: _colorTween.evaluate(animation),
+      size: widget.size,
+    );
+  }
+
+  @override
+  void forEachTween(context) {
+    _colorTween = context(
+      _colorTween,
+      widget.color,
+      (dynamic value) => ColorTween(begin: value),
+    );
+  }
+}

lib/animated_widgets/animated_image_revert.dart

@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+///动态颜色混合
+class AnimatedColorRevert extends ImplicitlyAnimatedWidget {
+  final Widget child;
+  final Color color;
+
+  AnimatedColorRevert({
+    this.child,
+    this.color,
+    Duration duration = const Duration(milliseconds: 300),
+    Curve curve = Curves.easeInOutCubic,
+  }) : super(
+          duration: duration,
+          curve: curve,
+        );
+  @override
+  ImplicitlyAnimatedWidgetState<ImplicitlyAnimatedWidget> createState() =>
+      _AnimatedColorRevertState();
+}
+
+class _AnimatedColorRevertState
+    extends AnimatedWidgetBaseState<AnimatedColorRevert> {
+  ColorTween _colorTween;
+  @override
+  Widget build(BuildContext context) {
+    return ColorFiltered(
+      colorFilter: ColorFilter.mode(
+        _colorTween.evaluate(animation),
+        BlendMode.modulate,
+      ),
+      child: widget.child,
+    );
+  }
+
+  @override
+  void forEachTween(context) {
+    _colorTween = context(
+      _colorTween,
+      widget.color,
+      (dynamic value) => ColorTween(begin: value),
+    );
+  }
+}

lib/animated_widgets/animated_rotate.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+///动态旋转
+class AnimatedRotate extends ImplicitlyAnimatedWidget {
+  final Widget child;
+  final Duration duration;
+  final Curve curve;
+  final double angle;
+
+  AnimatedRotate({
+    Key key,
+    @required this.child,
+    this.duration = const Duration(milliseconds: 400),
+    this.curve = Curves.easeInOutCubic,
+    @required this.angle,
+  }) : super(
+          key: key,
+          duration: duration,
+          curve: curve,
+        );
+  @override
+  ImplicitlyAnimatedWidgetState<ImplicitlyAnimatedWidget> createState() =>
+      _AnimatedRoateState();
+}
+
+class _AnimatedRoateState extends AnimatedWidgetBaseState<AnimatedRotate> {
+  Tween<double> _rotateTween;
+  @override
+  Widget build(BuildContext context) {
+    return Transform.rotate(
+      angle: _rotateTween.evaluate(animation),
+      child: widget.child,
+    );
+  }
+
+  @override
+  void forEachTween(visitor) {
+    _rotateTween = visitor(
+      _rotateTween,
+      widget.angle,
+      (dynamic value) => Tween<double>(begin: value),
+    );
+  }
+}

lib/common_widgets/aku_button.dart

@@ -0,0 +1,47 @@
+import 'package:aku_ui/common_widgets/aku_cupertino_button.dart';
+import 'package:aku_ui/common_widgets/aku_material_button.dart';
+import 'package:aku_ui/mixins/aku_mixins.dart';
+import 'package:flutter/material.dart';
+
+///按钮
+class AkuButton extends StatefulWidget {
+  @required
+  final Widget child;
+  final double height;
+  final double radius;
+  final EdgeInsets padding;
+  @required
+  final VoidCallback onPressed;
+  AkuButton({
+    Key key,
+    this.child,
+    this.height = 0,
+    this.radius = 0,
+    this.onPressed,
+    this.padding = EdgeInsets.zero,
+  }) : super(key: key);
+
+  @override
+  _AkuButtonState createState() => _AkuButtonState();
+}
+
+class _AkuButtonState extends State<AkuButton> with PlatformMixin {
+  @override
+  Widget build(BuildContext context) {
+    return isIOS
+        ? AkuCupertinoButton(
+            onPressed: widget.onPressed,
+            child: widget.child,
+            radius: widget.radius,
+            minHeight: widget.height,
+            padding: widget.padding,
+          )
+        : AkuMaterialButton(
+            onPressed: widget.onPressed,
+            child: widget.child,
+            radius: widget.radius,
+            height: widget.height,
+            padding: widget.padding,
+          );
+  }
+}

lib/common_widgets/aku_common_widgets.dart

@@ -0,0 +1 @@
+export 'aku_button.dart';

lib/common_widgets/aku_cupertino_button.dart

@@ -0,0 +1,32 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class AkuCupertinoButton extends CupertinoButton {
+  final VoidCallback onPressed;
+  final Widget child;
+  final Color color;
+  final EdgeInsetsGeometry padding;
+  final double radius;
+  final double minHeight;
+  final Color nullColor;
+
+  AkuCupertinoButton({
+    Key key,
+    @required this.onPressed,
+    @required this.child,
+    this.color = Colors.transparent,
+    this.padding = EdgeInsets.zero,
+    this.radius = 0,
+    this.minHeight = 0,
+    this.nullColor,
+  }) : super(
+          key: key,
+          child: child,
+          color: color,
+          onPressed: onPressed,
+          padding: padding,
+          borderRadius: BorderRadius.circular(radius),
+          minSize: minHeight,
+          disabledColor: nullColor ?? color.withAlpha(170),
+        );
+}

lib/common_widgets/aku_material_button.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+class AkuMaterialButton extends MaterialButton {
+  final VoidCallback onPressed;
+  final double elevation;
+  final double disabledElevation;
+  final double focusElevation;
+  final double highlightElevation;
+  final double hoverElevation;
+  final double height;
+  final double minWidth;
+  final double radius;
+  final EdgeInsets padding;
+
+  final Widget child;
+  AkuMaterialButton({
+    Key key,
+    @required this.onPressed,
+    this.elevation = 0,
+    this.disabledElevation = 0,
+    this.focusElevation = 0,
+    this.highlightElevation = 0,
+    this.hoverElevation = 0,
+    this.height = 48,
+    this.minWidth = 0,
+    this.radius = 0,
+    this.padding = EdgeInsets.zero,
+    @required this.child,
+  }) : super(
+          key: key,
+          onPressed: onPressed,
+          elevation: elevation,
+          disabledElevation: disabledElevation,
+          focusElevation: focusElevation,
+          highlightElevation: highlightElevation,
+          hoverElevation: hoverElevation,
+          height: height,
+          minWidth: minWidth,
+          padding: padding,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(radius),
+          ),
+          child: child,
+        );
+}

lib/common_widgets/aku_round_button.dart

@@ -0,0 +1,24 @@
+import 'package:aku_ui/aku_ui.dart';
+import 'package:flutter/material.dart';
+
+///圆角按钮
+class AkuRoundButton extends AkuButton {
+  final double height;
+  final VoidCallback onPressed;
+  final Widget child;
+  final EdgeInsets padding;
+  AkuRoundButton({
+    Key key,
+    this.height,
+    @required this.child,
+    @required this.onPressed,
+    this.padding = EdgeInsets.zero,
+  }) : super(
+          key: key,
+          height: height,
+          radius: height / 2,
+          onPressed: onPressed,
+          child: child,
+          padding: padding,
+        );
+}

lib/mixins/aku_mixins.dart

@@ -0,0 +1 @@
+export 'platform_mixin.dart';

lib/mixins/platform_mixin.dart

@@ -0,0 +1,6 @@
+import 'dart:io';
+
+class PlatformMixin {
+  bool get isIOS => Platform.isIOS;
+  bool get isAndroid => Platform.isAndroid;
+}