flutter app

.gitignore

@@ -0,0 +1,44 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

.metadata

@@ -0,0 +1,33 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled.
+
+version:
+  revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+  channel: stable
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+      base_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+    - platform: android
+      create_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+      base_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+    - platform: web
+      create_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+      base_revision: eb6d86ee27deecba4a83536aa20f366a6044895c
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

README.md

@@ -0,0 +1,16 @@
+# cpd_2022_energy
+
+A new Flutter project.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

analysis_options.yaml

@@ -0,0 +1,29 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

android/.gitignore

@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

android/app/build.gradle

@@ -0,0 +1,59 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "de.hsma.stud.cpd_2022_energy"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}

android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.hsma.stud.cpd_2022_energy">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,34 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.hsma.stud.cpd_2022_energy">
+   <application
+        android:label="cpd_2022_energy"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

android/app/src/main/java/de/hsma/stud/cpd_2022_energy/MainActivity.java

@@ -0,0 +1,6 @@
+package de.hsma.stud.cpd_2022_energy;
+
+import io.flutter.embedding.android.FlutterActivity;
+
+public class MainActivity extends FlutterActivity {
+}

android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.hsma.stud.cpd_2022_energy">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.6.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.1.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

android/settings.gradle

@@ -0,0 +1,11 @@
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

lib/main.dart

@@ -0,0 +1,518 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:provider/provider.dart';
+
+void main() {
+  runApp(const EnergyProviderApp());
+}
+
+class EnergyModel extends ChangeNotifier {
+  String startheight = "";
+  String endheight = "";
+  String startspeed="";
+  String endspeed="";
+  String weight="";
+
+  EnergyModel(){
+    startheight;
+    endheight;
+    startspeed;
+    endspeed;
+    weight;
+  }
+
+  void setStartheight(String input){
+    startheight=input;
+  }
+
+  void setEndheight(String input){
+    endheight= input;
+  }
+
+  void setStartspeed(String input){
+    startspeed=input;
+  }
+
+  void setEndspeed(String input){
+    endspeed=input;
+  }
+
+  void setWeight(String input){
+    weight=input;
+  }
+
+  void changeInput(String input) {
+    startheight = input;
+    notifyListeners();
+  }
+}
+
+class KineticModel extends ChangeNotifier{
+  String startheight = "";
+  String endheight = "";
+  String startspeed="";
+  String endspeed="";
+  String weight="";
+
+  KineticModel(){
+    startspeed;
+    endspeed;
+    weight;
+  }
+
+  void setStartspeed(String input){
+    startspeed=input;
+  }
+
+  void setEndspeed(String input){
+    endspeed=input;
+  }
+
+  void setWeight(String input){
+    weight=input;
+  }
+
+  void update(){
+    notifyListeners();
+  }
+
+}
+
+class PotentialModel extends ChangeNotifier{
+  String startheight = "";
+  String endheight = "";
+  String weight="";
+
+  PotentialModel(){
+    startheight;
+    endheight;
+    weight;
+  }
+
+  void setStartheight(String input){
+    startheight=input;
+  }
+
+  void setEndheight(String input){
+    endheight=input;
+  }
+
+  void setWeight(String input){
+    weight=input;
+  }
+
+  void update(){
+    notifyListeners();
+  }
+
+}
+
+class PotentialCalc extends StatelessWidget{
+  PotentialCalc({super.key});
+  final _formKey = GlobalKey<FormState>();
+
+  double calcPotentialE(double mass, double startheight, double endheight){
+    double height = (startheight-endheight).abs();
+    return mass * 9.81 * height;
+  }
+
+  double calcWater(double e){
+    return e/(80*4190);
+  }
+
+  double calcIron(double e){
+    return e/(460*680);
+  }
+
+  double joule=0.0;
+  double water=0.0;
+  double iron=0.0;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Potentielle Energie"),
+      ),
+      body: ChangeNotifierProvider(
+        create: (_) => PotentialModel(),
+        child: Center(
+          child: Column(
+            children: [
+              Consumer<PotentialModel>(
+                  builder: (context, model, child) => Column(
+                    children: [
+                      Center(
+                        child: Form(
+                          key: _formKey,
+                          child: Column(
+                            children: <Widget>[
+                              const Padding(
+                                padding: const EdgeInsets.all(8.0),
+                                child: const Text("Geben Sie Ihre Werte ein"),
+                              ),
+                              //Anfangsgeschwindigkeit
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 40, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setStartheight(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Anfangshöhe in Meter",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              //Endgeschwindigkeit
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 8, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setEndheight(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Endhöhe in Meter",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              // Gewicht des Objekts
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 40, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setWeight(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Gewicht in Kilogramm",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              IconButton(
+                                onPressed: () {
+                                  if(_formKey.currentState!.validate()){
+                                    _formKey.currentState!.save();
+                                  }
+                                  joule=calcPotentialE(double.parse(model.weight), double.parse(model.startheight), double.parse(model.endheight));
+                                  water=calcWater(joule);
+                                  iron=calcIron(joule);
+                                  model.update();
+
+                                },
+                                icon: const Icon(Icons.calculate, color: Colors.blue),
+                                tooltip: 'Berechne',
+                              ),
+
+                              //Divider
+                              const Divider(
+                                height: 40,
+                                thickness: 2,
+                                color: Colors.black,
+                              ),
+
+                              const Text("Ergebnis:"),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 16, right: 8, bottom: 0),
+                                child: Text(
+                                    joule.toStringAsFixed(2) +"Joule"
+                                ),
+                              ),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 16, right: 8, bottom: 0),
+                                child: Text(
+                                    "Damit kann man "+ water.toStringAsFixed(2) +"l Wasser zum Kochen bringen"
+                                ),
+                              ),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 8, right: 8, bottom: 0),
+                                child: Text(
+                                    "Damit kann man "+ iron.toStringAsFixed(2) +"kg Eisen zum Glühen bringen"
+                                ),
+                              ),
+
+
+                            ],
+                          ),
+                        ),
+
+                      ),
+                    ],
+                  )
+              ),
+            ],
+          ),
+        ),
+      ),
+
+
+      //TextButton(child: const Text("Berechne"),onPressed: () { },)
+    );
+  }
+
+
+}
+
+
+class KineticCalc extends StatelessWidget{
+    KineticCalc({super.key});
+    final _formKey = GlobalKey<FormState>();
+
+    double calcKineticE(double mass, double startspeed, double endspeed){
+      double speed = (startspeed-endspeed).abs();
+      return mass * speed * speed/2;
+    }
+
+    double calcWater(double e){
+      return (e/(80*4190));
+    }
+
+    double calcIron(double e){
+      return e/(460*680);
+    }
+
+    double joule=0.0;
+    double water=0;
+    double iron=0.0;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        appBar: AppBar(
+        title: const Text("Kinetische Energie"),
+        ),
+      body: ChangeNotifierProvider(
+        create: (_) => KineticModel(),
+        child: Center(
+          child: Column(
+            children: [
+              Consumer<KineticModel>(
+                  builder: (context, model, child) => Column(
+                    children: [
+                      Center(
+                        child: Form(
+                          key: _formKey,
+                          child: Column(
+                            children: <Widget>[
+                              Padding(
+                                padding: const EdgeInsets.all(8.0),
+                                child: const Text("Geben Sie Ihre Werte ein"),
+                              ),
+                              //Anfangsgeschwindigkeit
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 40, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setStartspeed(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Anfangsgeschwindigkeit in Meter/Sekunde",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              //Endgeschwindigkeit
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 8, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setEndspeed(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Endgeschwindigkeit in Meter/Sekunde",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              // Gewicht des Objekts
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 40, right: 8, bottom: 0),
+                                child: TextFormField(
+                                  onSaved: (String? val) {
+                                    model.setWeight(val!);
+                                  },
+                                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                                  inputFormatters: [
+                                    FilteringTextInputFormatter.allow(RegExp(r"^((\d+)?(\.)?(\d{1,2})?)"))
+                                  ],
+                                  decoration: const InputDecoration(
+                                    border: OutlineInputBorder(),
+                                    labelText: "Gewicht in Kilogramm",
+                                    hintText: "Geben Sie eine Dezimalzahl an",
+                                  ),
+                                ),
+                              ),
+
+                              IconButton(
+                                onPressed: () {
+                                  if(_formKey.currentState!.validate()){
+                                    _formKey.currentState!.save();
+                                  }
+                                  joule=calcKineticE(double.parse(model.weight), double.parse(model.startspeed), double.parse(model.endspeed));
+                                  water=calcWater(joule);
+                                  iron=calcIron(joule);
+                                  model.update();
+
+                                },
+                                icon: const Icon(Icons.calculate, color: Colors.blue),
+                                tooltip: 'Berechne',
+                              ),
+
+                              //Divider
+                              const Divider(
+                                height: 40,
+                                thickness: 2,
+                                color: Colors.black,
+                              ),
+
+                              const Text("Ergebnis:"),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 16, right: 8, bottom: 0),
+                                child: Text(
+                                  joule.toStringAsFixed(2)+" Joule"
+                                ),
+                              ),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 16, right: 8, bottom: 0),
+                                child: Text(
+                                    "Damit kann man "+ water.toStringAsFixed(2) +"l Wasser zum Kochen bringen"
+                                ),
+                              ),
+
+                              Padding(
+                                padding: const EdgeInsets.only(left: 8, top: 8, right: 8, bottom: 0),
+                                child: Text(
+                                    "Damit kann man "+ iron.toStringAsFixed(2) +"kg Eisen zum Glühen bringen"
+                                ),
+                              ),
+
+
+                            ],
+                          ),
+                        ),
+
+                      ),
+                    ],
+                  )
+              ),
+            ],
+          ),
+        ),
+      ),
+
+
+      //TextButton(child: const Text("Berechne"),onPressed: () { },)
+    );
+  }
+
+}
+
+class EnergyProviderApp extends StatelessWidget {
+  const EnergyProviderApp({super.key});
+
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Energiebilanz',
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+      ),
+      home: const EnergyApp(title: 'Energiebilanz Rechner'),
+      routes: {
+        "/kinetic": (context) => KineticCalc(),
+        "/potential": (context) => PotentialCalc(),
+      },
+    );
+  }
+}
+
+class EnergyApp extends StatefulWidget {
+  const EnergyApp({super.key, required this.title});
+
+  final String title;
+
+  @override
+  State<EnergyApp> createState() => _EnergyAppState();
+}
+
+class _EnergyAppState extends State<EnergyApp> {
+
+  double calcPotentialE(double mass, double startheight, double endheight){
+    return mass * 9.81 * (startheight - endheight).abs();
+  }
+
+  double calcKineticE(double mass, double startspeed, double endspeed){
+    double speed = (startspeed-endspeed).abs();
+    return mass * speed * speed;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(
+        child: Column(
+          children: [
+            Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: ElevatedButton(
+                onPressed: () {Navigator.pushNamed(context,"/kinetic");
+                },
+                child: const Text("Kinetische Energie berechnen"),
+              ),
+            ),
+            Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: ElevatedButton(
+                onPressed: () => {Navigator.pushNamed(context, "/potential")},
+                child: const Text("Potentielle Energie berechnen"),
+              ),
+            ),
+          ],
+        ),
+      ),
+
+
+
+    );
+  }
+}

pubspec.lock

@@ -0,0 +1,175 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.9.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.16.0"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.5"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.1"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.12"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.5"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.2"
+  provider:
+    dependency: "direct main"
+    description:
+      name: provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.0.4"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.12"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+sdks:
+  dart: ">=2.18.2 <3.0.0"
+  flutter: ">=1.16.0"

pubspec.yaml

@@ -0,0 +1,92 @@
+name: cpd_2022_energy
+description: A new Flutter project.
+
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 1.0.0+1
+
+environment:
+  sdk: '>=2.18.2 <3.0.0'
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.2
+  provider: ^6.0.1
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^2.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages

test/widget_test.dart

@@ -0,0 +1,30 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:cpd_2022_energy/main.dart';
+
+void main() {
+  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const EnergyProviderApp());
+
+    // Verify that our counter starts at 0.
+    expect(find.text('0'), findsOneWidget);
+    expect(find.text('1'), findsNothing);
+
+    // Tap the '+' icon and trigger a frame.
+    await tester.tap(find.byIcon(Icons.add));
+    await tester.pump();
+
+    // Verify that our counter has incremented.
+    expect(find.text('0'), findsNothing);
+    expect(find.text('1'), findsOneWidget);
+  });
+}

web/index.html

@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <!--
+    If you are serving your web app in a path other than the root, change the
+    href value below to reflect the base path you are serving from.
+
+    The path provided below has to start and end with a slash "/" in order for
+    it to work correctly.
+
+    For more details:
+    * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
+
+    This is a placeholder for base href that will be replaced by the value of
+    the `--base-href` argument provided to `flutter build`.
+  -->
+  <base href="$FLUTTER_BASE_HREF">
+
+  <meta charset="UTF-8">
+  <meta content="IE=Edge" http-equiv="X-UA-Compatible">
+  <meta name="description" content="A new Flutter project.">
+
+  <!-- iOS meta tags & icons -->
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  <meta name="apple-mobile-web-app-title" content="cpd_2022_energy">
+  <link rel="apple-touch-icon" href="icons/Icon-192.png">
+
+  <!-- Favicon -->
+  <link rel="icon" type="image/png" href="favicon.png"/>
+
+  <title>cpd_2022_energy</title>
+  <link rel="manifest" href="manifest.json">
+
+  <script>
+    // The value below is injected by flutter build, do not touch.
+    var serviceWorkerVersion = null;
+  </script>
+  <!-- This script adds the flutter initialization JS code -->
+  <script src="flutter.js" defer></script>
+</head>
+<body>
+  <script>
+    window.addEventListener('load', function(ev) {
+      // Download main.dart.js
+      _flutter.loader.loadEntrypoint({
+        serviceWorker: {
+          serviceWorkerVersion: serviceWorkerVersion,
+        }
+      }).then(function(engineInitializer) {
+        return engineInitializer.initializeEngine();
+      }).then(function(appRunner) {
+        return appRunner.runApp();
+      });
+    });
+  </script>
+</body>
+</html>

web/manifest.json

@@ -0,0 +1,35 @@
+{
+    "name": "cpd_2022_energy",
+    "short_name": "cpd_2022_energy",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "A new Flutter project.",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-maskable-192.png",
+            "sizes": "192x192",
+            "type": "image/png",
+            "purpose": "maskable"
+        },
+        {
+            "src": "icons/Icon-maskable-512.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ]
+}