Some changes

.gitignore

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+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+build/
+ios/.generated/
+ios/Flutter/Generated.xcconfig
+ios/Runner/GeneratedPluginRegistrant.*

CHANGELOG.md

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+## [0.0.1] - Release
+
+* A customizable animated walkthrough library written in dart.

LICENSE

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+TODO: Add your license here.

example/example_app.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_walkthrough/flutter_walkthrough.dart';
+import 'package:flutter_walkthrough/walkthrough.dart';
+
+class TestScreen extends StatelessWidget {
+  final List<Walkthrough> list = [
+    Walkthrough(
+      title: "Title 1",
+      content: "Content 1",
+      imageIcon: Icons.restaurant_menu,
+    ),
+    Walkthrough(
+      title: "Title 2",
+      content: "Content 2",
+      imageIcon: Icons.search,
+    ),
+    Walkthrough(
+      title: "Title 3",
+      content: "Content 3",
+      imageIcon: Icons.shopping_cart,
+    ),
+    Walkthrough(
+      title: "Title 4",
+      content: "Content 4",
+      imageIcon: Icons.verified_user,
+    ),
+  ];
+
+  @override
+  Widget build(BuildContext context) {
+    return new IntroScreen(
+      list,
+      new MaterialPageRoute(builder: (context) => new TestScreen()),
+    );
+  }
+}

flutter_walkthrough.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/.idea" />
+      <excludeFolder url="file://$MODULE_DIR$/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
+    <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Flutter Plugins" level="project" />
+  </component>
+</module>

lib/flutter_walkthrough.dart

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+library flutter_walkthrough;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_walkthrough/walkthrough.dart';
+
+/// A IntroScreen Class.
+///
+///
+
+class IntroScreen extends StatefulWidget {
+  final List<Walkthrough> walkthroughList;
+  final MaterialPageRoute pageRoute;
+  IntroScreen(this.walkthroughList, this.pageRoute);
+
+  void skipPage(BuildContext context) {
+    Navigator.push(context, pageRoute);
+  }
+
+  @override
+  IntroScreenState createState() {
+    return new IntroScreenState();
+  }
+}
+
+class IntroScreenState extends State<IntroScreen> {
+  final PageController controller = new PageController();
+  int currentPage = 0;
+  bool lastPage = false;
+
+  void _onPageChanged(int page) {
+    setState(() {
+      currentPage = page;
+      if (currentPage == widget.walkthroughList.length - 1) {
+        lastPage = true;
+      } else {
+        lastPage = false;
+      }
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      color: new Color(0xFFEEEEEE),
+      padding: const EdgeInsets.all(10.0),
+      child: new Column(
+        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+        children: <Widget>[
+          new Expanded(
+            flex: 1,
+            child: new Container(),
+          ),
+          new Expanded(
+            flex: 3,
+            child: new PageView(
+              children: widget.walkthroughList,
+              controller: controller,
+              onPageChanged: _onPageChanged,
+            ),
+          ),
+          new Expanded(
+            flex: 1,
+            child: new Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              crossAxisAlignment: CrossAxisAlignment.end,
+              children: <Widget>[
+                new FlatButton(
+                  child: new Text(lastPage ? "" : "SKIP",
+                      style: new TextStyle(
+                          color: Colors.black,
+                          fontWeight: FontWeight.bold,
+                          fontSize: 16.0)),
+                  onPressed: () => lastPage
+                      ? null
+                      : widget.skipPage(
+                          context,
+                        ),
+                ),
+                new FlatButton(
+                  child: new Text(lastPage ? "GOT IT" : "NEXT",
+                      style: new TextStyle(
+                          color: Colors.black,
+                          fontWeight: FontWeight.bold,
+                          fontSize: 16.0)),
+                  onPressed: () => lastPage
+                      ? widget.skipPage(context)
+                      : controller.nextPage(
+                          duration: Duration(milliseconds: 300),
+                          curve: Curves.easeIn),
+                ),
+              ],
+            ),
+          )
+        ],
+      ),
+    );
+  }
+}

lib/walkthrough.dart

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+import 'package:flutter/material.dart';
+
+class Walkthrough extends StatefulWidget {
+  final title;
+  final content;
+  final imageIcon;
+  final imagecolor;
+
+  Walkthrough(
+      {this.title,
+      this.content,
+      this.imageIcon,
+      this.imagecolor = Colors.redAccent});
+
+  @override
+  WalkthroughState createState() {
+    return new WalkthroughState();
+  }
+}
+
+class WalkthroughState extends State<Walkthrough>
+    with SingleTickerProviderStateMixin {
+  Animation animation;
+  AnimationController animationController;
+
+  @override
+  void initState() {
+    // TODO: implement initState
+    super.initState();
+    animationController = new AnimationController(
+        vsync: this, duration: new Duration(milliseconds: 500));
+    animation = new Tween(begin: -250.0, end: 0.0).animate(new CurvedAnimation(
+        parent: animationController, curve: Curves.easeInOut));
+
+    animation.addListener(() => setState(() {}));
+
+    animationController.forward();
+  }
+
+  @override
+  void dispose() {
+    // TODO: implement dispose
+    super.dispose();
+    animationController.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return new Container(
+      padding: const EdgeInsets.all(20.0),
+      child: new Material(
+        animationDuration: new Duration(milliseconds: 500),
+        elevation: 2.0,
+        borderRadius: new BorderRadius.all(Radius.circular(5.0)),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+          children: <Widget>[
+            new Transform(
+              transform:
+                  new Matrix4.translationValues(animation.value, 0.0, 0.0),
+              child: new Text(
+                widget.title,
+                style: new TextStyle(
+                    fontSize: 20.0,
+                    fontWeight: FontWeight.bold,
+                    color: Colors.black),
+              ),
+            ),
+            new Transform(
+              transform:
+                  new Matrix4.translationValues(animation.value, 0.0, 0.0),
+              child: new Text(widget.content,
+                  softWrap: true,
+                  textAlign: TextAlign.center,
+                  style: new TextStyle(
+                      fontWeight: FontWeight.normal,
+                      fontSize: 15.0,
+                      color: Colors.black)),
+            ),
+            new Icon(
+              widget.imageIcon,
+              size: 100.0,
+              color: widget.imagecolor,
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}