added Haptic feedback on touch collision

client/android/app/build.gradle

@@ -47,7 +47,8 @@ android {
         applicationId "com.example.hapticlink"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion flutter.minSdkVersion
+        // minSdkVersion flutter.minSdkVersion
+        minSdkVersion 19
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

client/android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.hapticlink">
+    <uses-permission android:name="android.permission.VIBRATE"/>
    <application
         android:label="hapticlink"
         android:name="${applicationName}"

client/lib/HomeScreen.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart'; // for going in fullscreen mode
 import 'package:flutter/scheduler.dart';  // to add scheduler for touch collision detection
 
-
 import 'package:shared_preferences/shared_preferences.dart';
 
 import 'package:web_socket_channel/web_socket_channel.dart';
@@ -10,6 +9,8 @@ import 'package:web_socket_channel/status.dart' as status;
 
 import 'package:flutter_colorpicker/flutter_colorpicker.dart';
 
+import 'package:vibration/vibration.dart';  // for the haptics
+
 import "dart:convert";
 import "dart:async";
 
@@ -38,10 +39,12 @@ class HomeScreenState extends State<HomeScreen>{
 
   late Timer sendTouchScheduler;
 
-  double touchsize=40;
+  double touchsize=100;
   double touchX = 0,touchY=0;
   bool isTouching=false;
 
+  bool hasCollided=false;
+
   late List<String> roomidList,roomnameList;
   String currRoomId="",currRoomName="";
   String username="";
@@ -72,8 +75,8 @@ class HomeScreenState extends State<HomeScreen>{
       "id": "string",
       },
       "position": {
-        "x": 200,
-        "y": 200,
+        "x": 200.0,
+        "y": 200.0,
       },
       "color": "ff2244bb", // Hex value.
       "intensity": 1, // Vibration intensity.
@@ -506,14 +509,53 @@ class HomeScreenState extends State<HomeScreen>{
       // print("x:"+x.toString()+"\ty:"+y.toString());
       // print("dx:"+dx.toString()+"\tdy:"+dy.toString());
       if (dx<=touchsize && dy<=touchsize){
-        print("Touch Collision.");
+
+        if(hasCollided==false){
+          // Collision Started
+          print("Touch Collision started");
+
+          startHapticFeedback();
+          
+          setState(() {
+            hasCollided=true;
+          });
+        }
+      }
+      else{
+
+        if(hasCollided==true){
+          // collision ended
+          print("Touch Collision ended");
+          
+          endHapticFeedback();
+
+          setState(() {
+              hasCollided=false;
+          });
+        }
+        // print("No Touch Collision.");
       }
-      // else{
-      //   print("No Touch Collision.");
-      // }
     }
   }
 
+  void startHapticFeedback() async{
+    try{
+      if (await Vibration.hasVibrator()==true) {
+        Vibration.vibrate(pattern:[100,100,20], repeat: 1);  // short fast
+        // Vibration.vibrate(pattern:[100, 200, 400],repeat: 1);   // slow     
+      }
+    }
+    catch(e){}
+  }
+  void endHapticFeedback() async{
+    try{
+      if (await Vibration.hasVibrator()==true) {
+        Vibration.cancel();
+      }
+    }
+    catch(e){}
+  }
+
   void detectTouchStart(DragStartDetails details){
     // we have to stop see touch out of touch area
     // print(details.localPosition);
@@ -560,14 +602,18 @@ class HomeScreenState extends State<HomeScreen>{
     // print(profileColor);
     // print(details.globalPosition);
     
-    // // detect Collision
-    // SchedulerBinding.instance.addPostFrameCallback((_) {
-    //   detectTouchCollision();
-    // });
   }
 
+  
+
   void detectTouchEnd(DragEndDetails details){
     
+    // detect Collision end
+    detectTouchCollision(
+      x:0,
+      y:0,
+    );
+
     setState(() {
       touchX = 0;
       touchY = 0;

client/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,8 +5,10 @@
 import FlutterMacOS
 import Foundation
 
+import device_info_plus
 import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  DeviceInfoPlusMacosPlugin.register(with: registry.registrar(forPlugin: "DeviceInfoPlusMacosPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

client/pubspec.lock

@@ -57,6 +57,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  device_info_plus:
+    dependency: transitive
+    description:
+      name: device_info_plus
+      sha256: "7035152271ff67b072a211152846e9f1259cf1be41e34cd3e0b5463d2d6b8419"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.1.0"
+  device_info_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: device_info_plus_platform_interface
+      sha256: d3b01d5868b50ae571cd1dc6e502fc94d956b665756180f7b16ead09e836fd64
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   fake_async:
     dependency: transitive
     description:
@@ -325,6 +341,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  vibration:
+    dependency: "direct main"
+    description:
+      name: vibration
+      sha256: "63d4f6b03e38d106599da18e786d5edcd02354433a4ed478fccbbcfc347193ab"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.3"
   web_socket_channel:
     dependency: "direct main"
     description:
@@ -341,6 +365,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.4"
+  win32_registry:
+    dependency: transitive
+    description:
+      name: win32_registry
+      sha256: "1c52f994bdccb77103a6231ad4ea331a244dbcef5d1f37d8462f713143b0bfae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   xdg_directories:
     dependency: transitive
     description:

client/pubspec.yaml

@@ -12,6 +12,7 @@ dependencies:
     sdk: flutter
   flutter_colorpicker: ^1.0.3
   shared_preferences: ^2.2.2
+  vibration: ^1.8.3
   web_socket_channel: ^2.4.0
 
 dev_dependencies: