├── .gitignore ├── .metadata ├── README.md ├── android ├── app │ ├── build.gradle │ └── src │ │ ├── debug │ │ └── AndroidManifest.xml │ │ ├── main │ │ ├── AndroidManifest.xml │ │ ├── kotlin │ │ │ └── com │ │ │ │ └── example │ │ │ │ └── calculator │ │ │ │ └── MainActivity.kt │ │ └── res │ │ │ ├── drawable │ │ │ └── launch_background.xml │ │ │ ├── mipmap-hdpi │ │ │ └── ic_launcher.png │ │ │ ├── mipmap-mdpi │ │ │ └── ic_launcher.png │ │ │ ├── mipmap-xhdpi │ │ │ └── ic_launcher.png │ │ │ ├── mipmap-xxhdpi │ │ │ └── ic_launcher.png │ │ │ ├── mipmap-xxxhdpi │ │ │ └── ic_launcher.png │ │ │ └── values │ │ │ └── styles.xml │ │ └── profile │ │ └── AndroidManifest.xml ├── build.gradle ├── gradle.properties ├── gradle │ └── wrapper │ │ └── gradle-wrapper.properties └── settings.gradle ├── calculator.gif ├── ios ├── Flutter │ ├── AppFrameworkInfo.plist │ ├── Debug.xcconfig │ └── Release.xcconfig ├── Runner.xcodeproj │ ├── project.pbxproj │ ├── project.xcworkspace │ │ └── contents.xcworkspacedata │ └── xcshareddata │ │ └── xcschemes │ │ └── Runner.xcscheme ├── Runner.xcworkspace │ └── contents.xcworkspacedata └── Runner │ ├── AppDelegate.swift │ ├── Assets.xcassets │ ├── AppIcon.appiconset │ │ ├── Contents.json │ │ ├── Icon-App-1024x1024@1x.png │ │ ├── Icon-App-20x20@1x.png │ │ ├── Icon-App-20x20@2x.png │ │ ├── Icon-App-20x20@3x.png │ │ ├── Icon-App-29x29@1x.png │ │ ├── Icon-App-29x29@2x.png │ │ ├── Icon-App-29x29@3x.png │ │ ├── Icon-App-40x40@1x.png │ │ ├── Icon-App-40x40@2x.png │ │ ├── Icon-App-40x40@3x.png │ │ ├── Icon-App-60x60@2x.png │ │ ├── Icon-App-60x60@3x.png │ │ ├── Icon-App-76x76@1x.png │ │ ├── Icon-App-76x76@2x.png │ │ └── Icon-App-83.5x83.5@2x.png │ └── LaunchImage.imageset │ │ ├── Contents.json │ │ ├── LaunchImage.png │ │ ├── LaunchImage@2x.png │ │ ├── LaunchImage@3x.png │ │ └── README.md │ ├── Base.lproj │ ├── LaunchScreen.storyboard │ └── Main.storyboard │ ├── Info.plist │ └── Runner-Bridging-Header.h ├── lib ├── calFun.dart ├── constant.dart ├── main.dart └── widgets │ └── button.dart ├── pubspec.lock ├── pubspec.yaml └── test └── widget_test.dart /.gitignore: -------------------------------------------------------------------------------- 1 | # Miscellaneous 2 | *.class 3 | *.log 4 | *.pyc 5 | *.swp 6 | .DS_Store 7 | .atom/ 8 | .buildlog/ 9 | .history 10 | .svn/ 11 | 12 | # IntelliJ related 13 | *.iml 14 | *.ipr 15 | *.iws 16 | .idea/ 17 | 18 | # The .vscode folder contains launch configuration and tasks you configure in 19 | # VS Code which you may wish to be included in version control, so this line 20 | # is commented out by default. 21 | #.vscode/ 22 | 23 | # Flutter/Dart/Pub related 24 | **/doc/api/ 25 | .dart_tool/ 26 | .flutter-plugins 27 | .packages 28 | .pub-cache/ 29 | .pub/ 30 | /build/ 31 | 32 | # Android related 33 | **/android/**/gradle-wrapper.jar 34 | **/android/.gradle 35 | **/android/captures/ 36 | **/android/gradlew 37 | **/android/gradlew.bat 38 | **/android/local.properties 39 | **/android/**/GeneratedPluginRegistrant.java 40 | 41 | # iOS/XCode related 42 | **/ios/**/*.mode1v3 43 | **/ios/**/*.mode2v3 44 | **/ios/**/*.moved-aside 45 | **/ios/**/*.pbxuser 46 | **/ios/**/*.perspectivev3 47 | **/ios/**/*sync/ 48 | **/ios/**/.sconsign.dblite 49 | **/ios/**/.tags* 50 | **/ios/**/.vagrant/ 51 | **/ios/**/DerivedData/ 52 | **/ios/**/Icon? 53 | **/ios/**/Pods/ 54 | **/ios/**/.symlinks/ 55 | **/ios/**/profile 56 | **/ios/**/xcuserdata 57 | **/ios/.generated/ 58 | **/ios/Flutter/App.framework 59 | **/ios/Flutter/Flutter.framework 60 | **/ios/Flutter/Generated.xcconfig 61 | **/ios/Flutter/app.flx 62 | **/ios/Flutter/app.zip 63 | **/ios/Flutter/flutter_assets/ 64 | **/ios/Flutter/flutter_export_environment.sh 65 | **/ios/ServiceDefinitions.json 66 | **/ios/Runner/GeneratedPluginRegistrant.* 67 | 68 | # Exceptions to above rules. 69 | !**/ios/**/default.mode1v3 70 | !**/ios/**/default.mode2v3 71 | !**/ios/**/default.pbxuser 72 | !**/ios/**/default.perspectivev3 73 | !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages 74 | -------------------------------------------------------------------------------- /.metadata: -------------------------------------------------------------------------------- 1 | # This file tracks properties of this Flutter project. 2 | # Used by Flutter tool to assess capabilities and perform upgrades etc. 3 | # 4 | # This file should be version controlled and should not be manually edited. 5 | 6 | version: 7 | revision: 1aedbb1835bd6eb44550293d57d4d124f19901f0 8 | channel: stable 9 | 10 | project_type: app 11 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Full Functional Flutter Calculator 2 | 3 | **Design credit [dribbble](https://dribbble.com/shots/5638050-calculator)** 4 | 5 | ## Demo of the App 6 | 7 | ![Flutter Calculator Demo](https://github.com/abuanwar072/Flutter-Calculator/blob/master/calculator.gif) 8 | 9 | This calculator works like a normal calculator and can do simple tasks by using this calculator like summation or multiplication type things. Later I will add animation on this and add more facilities. 10 | 11 | **List of Todos** 12 | - [x] Summation 13 | - [x] Subtraction 14 | - [x] Multiplication 15 | - [x] Division 16 | - [ ] Percentage 17 | - [ ] Sine, Cosine and Tangent 18 | - [ ] Log, ln 19 | - [ ] **Animation** -------------------------------------------------------------------------------- /android/app/build.gradle: -------------------------------------------------------------------------------- 1 | def localProperties = new Properties() 2 | def localPropertiesFile = rootProject.file('local.properties') 3 | if (localPropertiesFile.exists()) { 4 | localPropertiesFile.withReader('UTF-8') { reader -> 5 | localProperties.load(reader) 6 | } 7 | } 8 | 9 | def flutterRoot = localProperties.getProperty('flutter.sdk') 10 | if (flutterRoot == null) { 11 | throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") 12 | } 13 | 14 | def flutterVersionCode = localProperties.getProperty('flutter.versionCode') 15 | if (flutterVersionCode == null) { 16 | flutterVersionCode = '1' 17 | } 18 | 19 | def flutterVersionName = localProperties.getProperty('flutter.versionName') 20 | if (flutterVersionName == null) { 21 | flutterVersionName = '1.0' 22 | } 23 | 24 | apply plugin: 'com.android.application' 25 | apply plugin: 'kotlin-android' 26 | apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" 27 | 28 | android { 29 | compileSdkVersion 28 30 | 31 | sourceSets { 32 | main.java.srcDirs += 'src/main/kotlin' 33 | } 34 | 35 | lintOptions { 36 | disable 'InvalidPackage' 37 | } 38 | 39 | defaultConfig { 40 | // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). 41 | applicationId "com.example.calculator" 42 | minSdkVersion 16 43 | targetSdkVersion 28 44 | versionCode flutterVersionCode.toInteger() 45 | versionName flutterVersionName 46 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 47 | } 48 | 49 | buildTypes { 50 | release { 51 | // TODO: Add your own signing config for the release build. 52 | // Signing with the debug keys for now, so `flutter run --release` works. 53 | signingConfig signingConfigs.debug 54 | } 55 | } 56 | } 57 | 58 | flutter { 59 | source '../..' 60 | } 61 | 62 | dependencies { 63 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 64 | testImplementation 'junit:junit:4.12' 65 | androidTestImplementation 'com.android.support.test:runner:1.0.2' 66 | androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' 67 | } 68 | -------------------------------------------------------------------------------- /android/app/src/debug/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /android/app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 4 | 9 | 13 | 20 | 24 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | -------------------------------------------------------------------------------- /android/app/src/main/kotlin/com/example/calculator/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package com.example.calculator 2 | 3 | import android.os.Bundle 4 | 5 | import io.flutter.app.FlutterActivity 6 | import io.flutter.plugins.GeneratedPluginRegistrant 7 | 8 | class MainActivity: FlutterActivity() { 9 | override fun onCreate(savedInstanceState: Bundle?) { 10 | super.onCreate(savedInstanceState) 11 | GeneratedPluginRegistrant.registerWith(this) 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /android/app/src/main/res/drawable/launch_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 12 | 13 | -------------------------------------------------------------------------------- /android/app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/android/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /android/app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/android/app/src/main/res/mipmap-mdpi/ic_launcher.png 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https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /android/app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 8 | 9 | -------------------------------------------------------------------------------- /android/app/src/profile/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 3 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /android/build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | ext.kotlin_version = '1.2.71' 3 | repositories { 4 | google() 5 | jcenter() 6 | } 7 | 8 | dependencies { 9 | classpath 'com.android.tools.build:gradle:3.2.1' 10 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 11 | } 12 | } 13 | 14 | allprojects { 15 | repositories { 16 | google() 17 | jcenter() 18 | } 19 | } 20 | 21 | rootProject.buildDir = '../build' 22 | subprojects { 23 | project.buildDir = "${rootProject.buildDir}/${project.name}" 24 | } 25 | subprojects { 26 | project.evaluationDependsOn(':app') 27 | } 28 | 29 | task clean(type: Delete) { 30 | delete rootProject.buildDir 31 | } 32 | -------------------------------------------------------------------------------- /android/gradle.properties: -------------------------------------------------------------------------------- 1 | org.gradle.jvmargs=-Xmx1536M 2 | 3 | -------------------------------------------------------------------------------- /android/gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Fri Jun 23 08:50:38 CEST 2017 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip 7 | -------------------------------------------------------------------------------- /android/settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | 3 | def flutterProjectRoot = rootProject.projectDir.parentFile.toPath() 4 | 5 | def plugins = new Properties() 6 | def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins') 7 | if (pluginsFile.exists()) { 8 | pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) } 9 | } 10 | 11 | plugins.each { name, path -> 12 | def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile() 13 | include ":$name" 14 | project(":$name").projectDir = pluginDirectory 15 | } 16 | -------------------------------------------------------------------------------- /calculator.gif: 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-------------------------------------------------------------------------------- /ios/Runner/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | import Flutter 3 | 4 | @UIApplicationMain 5 | @objc class AppDelegate: FlutterAppDelegate { 6 | override func application( 7 | _ application: UIApplication, 8 | didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? 9 | ) -> Bool { 10 | GeneratedPluginRegistrant.register(with: self) 11 | return super.application(application, didFinishLaunchingWithOptions: launchOptions) 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "size" : "20x20", 5 | "idiom" : "iphone", 6 | "filename" : "Icon-App-20x20@2x.png", 7 | "scale" : "2x" 8 | }, 9 | { 10 | "size" : "20x20", 11 | "idiom" : "iphone", 12 | "filename" : "Icon-App-20x20@3x.png", 13 | "scale" : "3x" 14 | }, 15 | { 16 | "size" : "29x29", 17 | "idiom" : "iphone", 18 | "filename" : "Icon-App-29x29@1x.png", 19 | "scale" : "1x" 20 | }, 21 | { 22 | "size" : "29x29", 23 | "idiom" : "iphone", 24 | "filename" : "Icon-App-29x29@2x.png", 25 | "scale" : "2x" 26 | }, 27 | { 28 | "size" : "29x29", 29 | "idiom" : "iphone", 30 | "filename" : "Icon-App-29x29@3x.png", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "size" : "40x40", 35 | "idiom" : "iphone", 36 | "filename" : "Icon-App-40x40@2x.png", 37 | "scale" : "2x" 38 | }, 39 | { 40 | "size" : "40x40", 41 | "idiom" : "iphone", 42 | "filename" : "Icon-App-40x40@3x.png", 43 | "scale" : "3x" 44 | }, 45 | { 46 | "size" : "60x60", 47 | "idiom" : "iphone", 48 | "filename" : "Icon-App-60x60@2x.png", 49 | "scale" : "2x" 50 | }, 51 | { 52 | "size" : "60x60", 53 | "idiom" : "iphone", 54 | "filename" : "Icon-App-60x60@3x.png", 55 | "scale" : "3x" 56 | }, 57 | { 58 | "size" : "20x20", 59 | "idiom" : "ipad", 60 | "filename" : "Icon-App-20x20@1x.png", 61 | "scale" : "1x" 62 | }, 63 | { 64 | "size" : "20x20", 65 | "idiom" : "ipad", 66 | "filename" : "Icon-App-20x20@2x.png", 67 | "scale" : "2x" 68 | }, 69 | { 70 | "size" : "29x29", 71 | "idiom" : "ipad", 72 | "filename" : "Icon-App-29x29@1x.png", 73 | "scale" : "1x" 74 | }, 75 | { 76 | "size" : "29x29", 77 | "idiom" : "ipad", 78 | "filename" : "Icon-App-29x29@2x.png", 79 | "scale" : "2x" 80 | }, 81 | { 82 | "size" : "40x40", 83 | "idiom" : "ipad", 84 | "filename" : "Icon-App-40x40@1x.png", 85 | "scale" : "1x" 86 | }, 87 | { 88 | "size" : "40x40", 89 | "idiom" : "ipad", 90 | "filename" : "Icon-App-40x40@2x.png", 91 | "scale" : "2x" 92 | }, 93 | { 94 | "size" : "76x76", 95 | "idiom" : "ipad", 96 | "filename" : "Icon-App-76x76@1x.png", 97 | "scale" : "1x" 98 | }, 99 | { 100 | "size" : "76x76", 101 | "idiom" : "ipad", 102 | "filename" : "Icon-App-76x76@2x.png", 103 | "scale" : "2x" 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-------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "universal", 5 | "filename" : "LaunchImage.png", 6 | "scale" : "1x" 7 | }, 8 | { 9 | "idiom" : "universal", 10 | "filename" : "LaunchImage@2x.png", 11 | "scale" : "2x" 12 | }, 13 | { 14 | "idiom" : "universal", 15 | "filename" : "LaunchImage@3x.png", 16 | "scale" : "3x" 17 | } 18 | ], 19 | "info" : { 20 | "version" : 1, 21 | "author" : "xcode" 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png -------------------------------------------------------------------------------- /ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png -------------------------------------------------------------------------------- /ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/abuanwar072/Flutter-Calculator/4453c400c02d1f876f4663cf75622fc029470eeb/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png -------------------------------------------------------------------------------- /ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md: -------------------------------------------------------------------------------- 1 | # Launch Screen Assets 2 | 3 | You can customize the launch screen with your own desired assets by replacing the image files in this directory. 4 | 5 | You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images. -------------------------------------------------------------------------------- /ios/Runner/Base.lproj/LaunchScreen.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | -------------------------------------------------------------------------------- /ios/Runner/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | -------------------------------------------------------------------------------- /ios/Runner/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | calculator 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | $(FLUTTER_BUILD_NAME) 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | $(FLUTTER_BUILD_NUMBER) 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UISupportedInterfaceOrientations 30 | 31 | UIInterfaceOrientationPortrait 32 | UIInterfaceOrientationLandscapeLeft 33 | UIInterfaceOrientationLandscapeRight 34 | 35 | UISupportedInterfaceOrientations~ipad 36 | 37 | UIInterfaceOrientationPortrait 38 | UIInterfaceOrientationPortraitUpsideDown 39 | UIInterfaceOrientationLandscapeLeft 40 | UIInterfaceOrientationLandscapeRight 41 | 42 | UIViewControllerBasedStatusBarAppearance 43 | 44 | 45 | 46 | -------------------------------------------------------------------------------- /ios/Runner/Runner-Bridging-Header.h: -------------------------------------------------------------------------------- 1 | #import "GeneratedPluginRegistrant.h" -------------------------------------------------------------------------------- /lib/calFun.dart: -------------------------------------------------------------------------------- 1 | double result; 2 | List num1List = []; 3 | List num2List = []; 4 | List _parameters = []; 5 | 6 | String displayInputs; 7 | 8 | List allInputs = []; 9 | 10 | calculation(String input) { 11 | // If user press the clear button 12 | if (input == "C") { 13 | num1List = []; 14 | num2List = []; 15 | _parameters = []; 16 | allInputs = []; 17 | displayInputs = null; 18 | result = null; 19 | return; 20 | } 21 | // if two value are available then the '=' work 22 | if (num1List.length != 0 && num2List.length != 0 && input == "=") { 23 | allOperations(); 24 | _parameters = []; 25 | num1List = ["$result"]; 26 | num2List = []; 27 | allInputs = ["$result"]; 28 | return; 29 | } else if (num2List.length == 0 && input == "=") 30 | return; // if one value input then press '=' then it did nothing 31 | 32 | if (input == "0" || 33 | input == "1" || 34 | input == "2" || 35 | input == "3" || 36 | input == "4" || 37 | input == "5" || 38 | input == "6" || 39 | input == "7" || 40 | input == "8" || 41 | input == "9" || 42 | input == ".") { 43 | if (_parameters.length == 0 && result == null) { 44 | num1List.add(input); 45 | // When pressed "=" after that hit any number 46 | } else if (_parameters.length == 0 && result != null) { 47 | result = null; 48 | num1List = []; 49 | allInputs = []; 50 | num1List.add(input); 51 | } else { 52 | num2List.add(input); 53 | } 54 | } 55 | if (input == "+" || input == "-" || input == "x" || input == "/") { 56 | if (_parameters.length == 0) { 57 | // When for the first time we hit any Operator button 58 | _parameters.add(input); 59 | } else { 60 | allOperations(); 61 | // When we press any operator button for the second time 62 | _parameters.add(input); 63 | } 64 | } 65 | 66 | allInputs.add(input); 67 | displayInputs = allInputs.join(); 68 | } 69 | 70 | void allOperations() { 71 | if (_parameters[_parameters.length - 1] == "+") { 72 | double sum = addition(num1List.join(), num2List.join()); 73 | num1List = ["$sum"]; 74 | num2List = []; 75 | result = sum; 76 | } else if (_parameters[_parameters.length - 1] == "-") { 77 | double subtract = subtraction(num1List.join(), num2List.join()); 78 | num1List = ["$subtract"]; 79 | num2List = []; 80 | result = subtract; 81 | } else if (_parameters[_parameters.length - 1] == "x") { 82 | double multi = multiplication(num1List.join(), num2List.join()); 83 | num1List = ["$multi"]; 84 | num2List = []; 85 | result = multi; 86 | } else if (_parameters[_parameters.length - 1] == "/") { 87 | double divi = division(num1List.join(), num2List.join()); 88 | num1List = ["$divi"]; 89 | num2List = []; 90 | result = divi; 91 | } 92 | } 93 | 94 | addition(String num1, String num2) { 95 | double addResult = double.parse(num1) + double.parse(num2); 96 | return addResult; 97 | } 98 | 99 | subtraction(String num1, String num2) { 100 | double subResult = double.parse(num1) - double.parse(num2); 101 | return subResult; 102 | } 103 | 104 | multiplication(String num1, String num2) { 105 | double mulResult = double.parse(num1) * double.parse(num2); 106 | return mulResult; 107 | } 108 | 109 | division(String num1, String num2) { 110 | double diviResult = double.parse(num1) / double.parse(num2); 111 | return diviResult; 112 | } 113 | -------------------------------------------------------------------------------- /lib/constant.dart: -------------------------------------------------------------------------------- 1 | import 'package:flutter/material.dart'; 2 | 3 | const kBackground = Color(0xFFF4FAFB); 4 | 5 | const kButtonBackground = Color(0xFF7ABDD7); 6 | const kCancelButtonBackground = Color(0xFF9FC3CF); 7 | const kTextColorBlack = Color(0xFF2C5364); 8 | const kTextColorWhite = Color(0xFFF4FAFB); 9 | const kTextColorDarkBlue = Color(0xFF2C7493); 10 | 11 | const typeTextStyle = TextStyle( 12 | fontSize: 28, 13 | color: kButtonBackground, 14 | ); 15 | 16 | const kResultTextStyle = TextStyle( 17 | fontSize: 40, color: kTextColorBlack, fontWeight: FontWeight.w500); 18 | -------------------------------------------------------------------------------- /lib/main.dart: -------------------------------------------------------------------------------- 1 | import 'package:calculator/calFun.dart'; 2 | import 'package:calculator/constant.dart'; 3 | import 'package:calculator/widgets/button.dart'; 4 | import 'package:flutter/material.dart'; 5 | 6 | void main() => runApp(MyApp()); 7 | 8 | class MyApp extends StatelessWidget { 9 | // This widget is the root of your application. 10 | @override 11 | Widget build(BuildContext context) { 12 | return MaterialApp( 13 | debugShowCheckedModeBanner: false, 14 | title: 'Calculator', 15 | theme: ThemeData( 16 | primarySwatch: Colors.blue, 17 | ), 18 | home: SafeArea( 19 | child: Scaffold( 20 | body: Calculator(), 21 | ), 22 | ), 23 | ); 24 | } 25 | } 26 | 27 | class Calculator extends StatefulWidget { 28 | const Calculator({ 29 | Key key, 30 | }) : super(key: key); 31 | 32 | @override 33 | _CalculatorState createState() => _CalculatorState(); 34 | } 35 | 36 | class _CalculatorState extends State { 37 | @override 38 | Widget build(BuildContext context) { 39 | return Column( 40 | mainAxisAlignment: MainAxisAlignment.start, 41 | children: [ 42 | Expanded( 43 | child: Padding( 44 | padding: const EdgeInsets.symmetric(vertical: 30, horizontal: 20), 45 | child: Column( 46 | mainAxisAlignment: MainAxisAlignment.spaceBetween, 47 | crossAxisAlignment: CrossAxisAlignment.start, 48 | children: [ 49 | Text( 50 | displayInputs == null ? "" : "$displayInputs", 51 | style: typeTextStyle, 52 | ), 53 | Align( 54 | child: Text( 55 | result == null ? "" : "$result", 56 | style: kResultTextStyle, 57 | ), 58 | ), 59 | ], 60 | ), 61 | ), 62 | ), 63 | Row( 64 | children: [ 65 | CalculatorButton( 66 | text: "C", 67 | backgroundColor: kButtonBackground.withOpacity(0.3), 68 | textColor: kTextColorWhite, 69 | press: () { 70 | setState( 71 | () { 72 | calculation("C"); 73 | }, 74 | ); 75 | }, 76 | ), 77 | CalculatorButton( 78 | text: "()", 79 | backgroundColor: kButtonBackground.withOpacity(0.1), 80 | press: () {}, 81 | ), 82 | CalculatorButton( 83 | text: "%", 84 | backgroundColor: kButtonBackground.withOpacity(0.1), 85 | press: () {}, 86 | ), 87 | CalculatorButton( 88 | text: "/", 89 | backgroundColor: kButtonBackground.withOpacity(0.1), 90 | press: () { 91 | setState( 92 | () { 93 | calculation("/"); 94 | }, 95 | ); 96 | }, 97 | ), 98 | ], 99 | ), 100 | Row( 101 | children: [ 102 | CalculatorButton( 103 | text: "7", 104 | press: () { 105 | setState( 106 | () { 107 | calculation("7"); 108 | }, 109 | ); 110 | }, 111 | ), 112 | CalculatorButton( 113 | text: "8", 114 | press: () { 115 | setState( 116 | () { 117 | calculation("8"); 118 | }, 119 | ); 120 | }, 121 | ), 122 | CalculatorButton( 123 | text: "9", 124 | press: () { 125 | setState( 126 | () { 127 | calculation("9"); 128 | }, 129 | ); 130 | }, 131 | ), 132 | CalculatorButton( 133 | text: "x", 134 | backgroundColor: kButtonBackground.withOpacity(0.1), 135 | press: () { 136 | setState( 137 | () { 138 | calculation("x"); 139 | }, 140 | ); 141 | }, 142 | ), 143 | ], 144 | ), 145 | Row( 146 | children: [ 147 | CalculatorButton( 148 | text: "4", 149 | press: () { 150 | setState( 151 | () { 152 | calculation("4"); 153 | }, 154 | ); 155 | }, 156 | ), 157 | CalculatorButton( 158 | text: "5", 159 | press: () { 160 | setState( 161 | () { 162 | calculation("5"); 163 | }, 164 | ); 165 | }, 166 | ), 167 | CalculatorButton( 168 | text: "6", 169 | press: () { 170 | setState( 171 | () { 172 | calculation("6"); 173 | }, 174 | ); 175 | }, 176 | ), 177 | CalculatorButton( 178 | text: "-", 179 | press: () { 180 | setState( 181 | () { 182 | calculation("-"); 183 | }, 184 | ); 185 | }, 186 | backgroundColor: kButtonBackground.withOpacity(0.1), 187 | ), 188 | ], 189 | ), 190 | Row( 191 | children: [ 192 | CalculatorButton( 193 | text: "1", 194 | press: () { 195 | setState( 196 | () { 197 | calculation("1"); 198 | }, 199 | ); 200 | }, 201 | ), 202 | CalculatorButton( 203 | text: "2", 204 | press: () { 205 | setState( 206 | () { 207 | calculation("2"); 208 | }, 209 | ); 210 | }, 211 | ), 212 | CalculatorButton( 213 | text: "3", 214 | press: () { 215 | setState( 216 | () { 217 | calculation("3"); 218 | }, 219 | ); 220 | }, 221 | ), 222 | CalculatorButton( 223 | text: "+", 224 | backgroundColor: kButtonBackground.withOpacity(0.1), 225 | press: () { 226 | setState( 227 | () { 228 | calculation("+"); 229 | }, 230 | ); 231 | }, 232 | ), 233 | ], 234 | ), 235 | Row( 236 | children: [ 237 | Expanded( 238 | child: Container(), 239 | ), 240 | CalculatorButton( 241 | text: "0", 242 | press: () { 243 | setState( 244 | () { 245 | calculation("0"); 246 | }, 247 | ); 248 | }, 249 | ), 250 | CalculatorButton( 251 | text: ".", 252 | press: () { 253 | setState( 254 | () { 255 | calculation("."); 256 | }, 257 | ); 258 | }, 259 | ), 260 | CalculatorButton( 261 | text: "=", 262 | backgroundColor: kButtonBackground, 263 | textColor: kTextColorWhite, 264 | press: () { 265 | setState( 266 | () { 267 | calculation("="); 268 | }, 269 | ); 270 | }, 271 | ), 272 | ], 273 | ), 274 | ], 275 | ); 276 | } 277 | } 278 | -------------------------------------------------------------------------------- /lib/widgets/button.dart: -------------------------------------------------------------------------------- 1 | import 'package:calculator/constant.dart'; 2 | import 'package:flutter/material.dart'; 3 | 4 | class CalculatorButton extends StatelessWidget { 5 | const CalculatorButton({ 6 | this.backgroundColor = Colors.transparent, 7 | this.textColor = kTextColorBlack, 8 | @required this.text, 9 | @required this.press, 10 | }); 11 | 12 | final Color backgroundColor; 13 | final Color textColor; 14 | final String text; 15 | final Function press; 16 | 17 | @override 18 | Widget build(BuildContext context) { 19 | return Expanded( 20 | child: Container( 21 | color: backgroundColor, 22 | child: FlatButton( 23 | color: backgroundColor, 24 | padding: EdgeInsets.all(30), 25 | onPressed: press, 26 | child: Text( 27 | "$text", 28 | style: TextStyle( 29 | color: textColor, 30 | fontSize: 30, 31 | ), 32 | ), 33 | ), 34 | ), 35 | ); 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /pubspec.lock: -------------------------------------------------------------------------------- 1 | # Generated by pub 2 | # See https://dart.dev/tools/pub/glossary#lockfile 3 | packages: 4 | async: 5 | dependency: transitive 6 | description: 7 | name: async 8 | url: "https://pub.dartlang.org" 9 | source: hosted 10 | version: "2.3.0" 11 | boolean_selector: 12 | dependency: transitive 13 | description: 14 | name: boolean_selector 15 | url: "https://pub.dartlang.org" 16 | source: hosted 17 | version: "1.0.5" 18 | charcode: 19 | dependency: transitive 20 | description: 21 | name: charcode 22 | url: "https://pub.dartlang.org" 23 | source: hosted 24 | version: "1.1.2" 25 | collection: 26 | dependency: transitive 27 | description: 28 | name: collection 29 | url: "https://pub.dartlang.org" 30 | source: hosted 31 | version: "1.14.11" 32 | cupertino_icons: 33 | dependency: "direct main" 34 | description: 35 | name: cupertino_icons 36 | url: "https://pub.dartlang.org" 37 | source: hosted 38 | version: "0.1.2" 39 | flutter: 40 | dependency: "direct main" 41 | description: flutter 42 | source: sdk 43 | version: "0.0.0" 44 | flutter_test: 45 | dependency: "direct dev" 46 | description: flutter 47 | source: sdk 48 | version: "0.0.0" 49 | matcher: 50 | dependency: transitive 51 | description: 52 | name: matcher 53 | url: "https://pub.dartlang.org" 54 | source: hosted 55 | version: "0.12.5" 56 | meta: 57 | dependency: transitive 58 | description: 59 | name: meta 60 | url: "https://pub.dartlang.org" 61 | source: hosted 62 | version: "1.1.7" 63 | path: 64 | dependency: transitive 65 | description: 66 | name: path 67 | url: "https://pub.dartlang.org" 68 | source: hosted 69 | version: "1.6.4" 70 | pedantic: 71 | dependency: transitive 72 | description: 73 | name: pedantic 74 | url: "https://pub.dartlang.org" 75 | source: hosted 76 | version: "1.8.0+1" 77 | quiver: 78 | dependency: transitive 79 | description: 80 | name: quiver 81 | url: "https://pub.dartlang.org" 82 | source: hosted 83 | version: "2.0.5" 84 | sky_engine: 85 | dependency: transitive 86 | description: flutter 87 | source: sdk 88 | version: "0.0.99" 89 | source_span: 90 | dependency: transitive 91 | description: 92 | name: source_span 93 | url: "https://pub.dartlang.org" 94 | source: hosted 95 | version: "1.5.5" 96 | stack_trace: 97 | dependency: transitive 98 | description: 99 | name: stack_trace 100 | url: "https://pub.dartlang.org" 101 | source: hosted 102 | version: "1.9.3" 103 | stream_channel: 104 | dependency: transitive 105 | description: 106 | name: stream_channel 107 | url: "https://pub.dartlang.org" 108 | source: hosted 109 | version: "2.0.0" 110 | string_scanner: 111 | dependency: transitive 112 | description: 113 | name: string_scanner 114 | url: "https://pub.dartlang.org" 115 | source: hosted 116 | version: "1.0.5" 117 | term_glyph: 118 | dependency: transitive 119 | description: 120 | name: term_glyph 121 | url: "https://pub.dartlang.org" 122 | source: hosted 123 | version: "1.1.0" 124 | test_api: 125 | dependency: transitive 126 | description: 127 | name: test_api 128 | url: "https://pub.dartlang.org" 129 | source: hosted 130 | version: "0.2.5" 131 | typed_data: 132 | dependency: transitive 133 | description: 134 | name: typed_data 135 | url: "https://pub.dartlang.org" 136 | source: hosted 137 | version: "1.1.6" 138 | vector_math: 139 | dependency: transitive 140 | description: 141 | name: vector_math 142 | url: "https://pub.dartlang.org" 143 | source: hosted 144 | version: "2.0.8" 145 | sdks: 146 | dart: ">=2.2.2 <3.0.0" 147 | -------------------------------------------------------------------------------- /pubspec.yaml: -------------------------------------------------------------------------------- 1 | name: calculator 2 | description: A new Flutter project. 3 | 4 | # The following defines the version and build number for your application. 5 | # A version number is three numbers separated by dots, like 1.2.43 6 | # followed by an optional build number separated by a +. 7 | # Both the version and the builder number may be overridden in flutter 8 | # build by specifying --build-name and --build-number, respectively. 9 | # In Android, build-name is used as versionName while build-number used as versionCode. 10 | # Read more about Android versioning at https://developer.android.com/studio/publish/versioning 11 | # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion. 12 | # Read more about iOS versioning at 13 | # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html 14 | version: 1.0.0+1 15 | 16 | environment: 17 | sdk: ">=2.1.0 <3.0.0" 18 | 19 | dependencies: 20 | flutter: 21 | sdk: flutter 22 | 23 | # The following adds the Cupertino Icons font to your application. 24 | # Use with the CupertinoIcons class for iOS style icons. 25 | cupertino_icons: ^0.1.2 26 | 27 | dev_dependencies: 28 | flutter_test: 29 | sdk: flutter 30 | 31 | 32 | # For information on the generic Dart part of this file, see the 33 | # following page: https://dart.dev/tools/pub/pubspec 34 | 35 | # The following section is specific to Flutter. 36 | flutter: 37 | 38 | # The following line ensures that the Material Icons font is 39 | # included with your application, so that you can use the icons in 40 | # the material Icons class. 41 | uses-material-design: true 42 | 43 | # To add assets to your application, add an assets section, like this: 44 | # assets: 45 | # - images/a_dot_burr.jpeg 46 | # - images/a_dot_ham.jpeg 47 | 48 | # An image asset can refer to one or more resolution-specific "variants", see 49 | # https://flutter.dev/assets-and-images/#resolution-aware. 50 | 51 | # For details regarding adding assets from package dependencies, see 52 | # https://flutter.dev/assets-and-images/#from-packages 53 | 54 | # To add custom fonts to your application, add a fonts section here, 55 | # in this "flutter" section. Each entry in this list should have a 56 | # "family" key with the font family name, and a "fonts" key with a 57 | # list giving the asset and other descriptors for the font. For 58 | # example: 59 | # fonts: 60 | # - family: Schyler 61 | # fonts: 62 | # - asset: fonts/Schyler-Regular.ttf 63 | # - asset: fonts/Schyler-Italic.ttf 64 | # style: italic 65 | # - family: Trajan Pro 66 | # fonts: 67 | # - asset: fonts/TrajanPro.ttf 68 | # - asset: fonts/TrajanPro_Bold.ttf 69 | # weight: 700 70 | # 71 | # For details regarding fonts from package dependencies, 72 | # see https://flutter.dev/custom-fonts/#from-packages 73 | -------------------------------------------------------------------------------- /test/widget_test.dart: -------------------------------------------------------------------------------- 1 | // This is a basic Flutter widget test. 2 | // 3 | // To perform an interaction with a widget in your test, use the WidgetTester 4 | // utility that Flutter provides. For example, you can send tap and scroll 5 | // gestures. You can also use WidgetTester to find child widgets in the widget 6 | // tree, read text, and verify that the values of widget properties are correct. 7 | 8 | import 'package:flutter/material.dart'; 9 | import 'package:flutter_test/flutter_test.dart'; 10 | 11 | import 'package:calculator/main.dart'; 12 | 13 | void main() { 14 | testWidgets('Counter increments smoke test', (WidgetTester tester) async { 15 | // Build our app and trigger a frame. 16 | await tester.pumpWidget(MyApp()); 17 | 18 | // Verify that our counter starts at 0. 19 | expect(find.text('0'), findsOneWidget); 20 | expect(find.text('1'), findsNothing); 21 | 22 | // Tap the '+' icon and trigger a frame. 23 | await tester.tap(find.byIcon(Icons.add)); 24 | await tester.pump(); 25 | 26 | // Verify that our counter has incremented. 27 | expect(find.text('0'), findsNothing); 28 | expect(find.text('1'), findsOneWidget); 29 | }); 30 | } 31 | --------------------------------------------------------------------------------