connection to FlightGear and design

app/src/main/java/com/example/flightgearcontrollerapp/model/FGModel.kt

@@ -0,0 +1,50 @@
+package com.example.flightgearcontrollerapp.model
+
+
+class FGModel {
+    private val telnetClient = TelnetClient()
+    private var isExceptionOccurred = false
+
+    //private val joystickView = JoystickView()
+    private var isTouchingJoystick = false
+
+/*
+    private val jsCenterX = 0
+    private val jsCenterY = 0
+    private val jsOuterRadius = 0
+    private val jsInnerRadius = 0
+*/
+
+
+    fun connect(ipAddress: String, portAddress: String): Boolean {
+        var res = false
+        val t = Thread {
+            try {
+                res = telnetClient.connect(ipAddress, portAddress.toInt())
+            } catch (e: Exception) {
+                e.printStackTrace()
+                throw RuntimeException(e)
+            }
+        }
+        val h = Thread.UncaughtExceptionHandler { _, _ -> isExceptionOccurred = true;res= false }
+        t.uncaughtExceptionHandler = h
+        t.start()
+        try {
+            t.join()
+            if (!isExceptionOccurred) {
+                this.isTouchingJoystick = false
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            return false
+        }
+        return res
+    }
+
+    fun disconnect() {
+        telnetClient.disconnect()
+    }
+
+}
+
+

app/src/main/java/com/example/flightgearcontrollerapp/model/FG_model.kt

@@ -1,4 +0,0 @@
-package com.example.flightgearcontrollerapp.model
-
-class FG_model {
-}

app/src/main/java/com/example/flightgearcontrollerapp/model/TelnetClient.kt

@@ -0,0 +1,28 @@
+package com.example.flightgearcontrollerapp.model
+
+import java.io.PrintWriter
+import java.net.Socket
+
+class TelnetClient{
+
+    private lateinit var client:Socket
+    private lateinit var output:PrintWriter
+    fun connect(ipAddress: String, portAddress: Int): Boolean {
+        return try {
+            client = Socket(ipAddress, portAddress)
+            output = PrintWriter(client.getOutputStream(), true)
+            true
+        }catch (e: Exception){
+            e.printStackTrace()
+            false
+        }
+    }
+
+    fun disconnect() {
+        try{
+            client.close()
+        }catch (e: Exception){
+            e.printStackTrace()
+        }
+    }
+}

app/src/main/java/com/example/flightgearcontrollerapp/view_model/VM_connection.kt

@@ -1,4 +0,0 @@
-package com.example.flightgearcontrollerapp.view_model
-
-class VM_connection {
-}

app/src/main/java/com/example/flightgearcontrollerapp/view_model/ViewModel.kt

@@ -0,0 +1,18 @@
+package com.example.flightgearcontrollerapp.view_model
+
+import androidx.lifecycle.ViewModel
+import com.example.flightgearcontrollerapp.model.FGModel
+
+class FGViewModel : ViewModel() {
+    private val model = FGModel()
+    fun connectToFG(ipAddress: String, portAddress: String): Boolean{
+        if(model.connect(ipAddress,portAddress)){
+            return true
+        }
+        return false
+    }
+
+    fun disconnectFromFG() {
+        model.disconnect()
+    }
+}

app/src/main/java/com/example/flightgearcontrollerapp/views/JoystickView.kt

@@ -0,0 +1,4 @@
+package com.example.flightgearcontrollerapp.views
+
+class JoystickView{
+}

app/src/main/java/com/example/flightgearcontrollerapp/views/MainActivity.kt

@@ -1,12 +1,64 @@
 package com.example.flightgearcontrollerapp.views
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import android.widget.Button
+import android.widget.EditText
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
 import com.example.flightgearcontrollerapp.R
+import com.example.flightgearcontrollerapp.R.id.*
+import com.example.flightgearcontrollerapp.view_model.FGViewModel
+
 
 class MainActivity : AppCompatActivity() {
+
+    //private var vmConnection: FGViewModel = FGViewModel()
+    private var isConnected = false
+    private val vmConnection = FGViewModel()
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
     }
-}
+
+    fun onClickConnect(view: View) {
+        if (view.id == btn_connect) {
+            val btnConnection = findViewById<Button>(btn_connect)
+            if (!isConnected) {
+                val editTextIP = findViewById<EditText>(ip_address)
+                val editTextPort = findViewById<EditText>(port_address)
+                val builder = AlertDialog.Builder(this)
+                builder.setTitle(getString(R.string.alert_dialog_flightgear_connection))
+                builder.setMessage(getString(R.string.alert_instruction))
+                builder.setPositiveButton(getString(R.string.ok_btn)){ dialog, _ ->
+                    if ((editTextIP.text.toString() !="")&&(editTextPort.text.toString()!="")&&(vmConnection.connectToFG(editTextIP.text.toString(),editTextPort.text.toString()))) {
+                        btnConnection.setText(R.string.disconnect)
+                        isConnected = true
+                    } else {
+                        val conFailed = AlertDialog.Builder(this)
+                        conFailed.setTitle(getString(R.string.alert_title))
+                        conFailed.setMessage(getString(R.string.connection_failed))
+                        val alertFail = conFailed.create()
+                        alertFail.show()
+                    }
+                    dialog.cancel()
+                }
+                builder.setNegativeButton(getString(android.R.string.cancel)){ dialog, _ ->
+                    dialog.cancel()
+                }
+                val alert = builder.create()
+                alert.show()
+
+            } else {
+                vmConnection.disconnectFromFG()
+                btnConnection.setText(R.string.btn_connect)
+                isConnected = false
+            }
+        }
+    }
+
+
+
+
+}
+