added ipv4 validation in startupview

client/src/main/kotlin/org/hso/texturesyncclient/view/startupView/StartupView.kt

@@ -1,5 +1,6 @@
 package org.hso.texturesyncclient.view.startupView
 
+import com.jfoenix.animation.alert.CenterTransition
 import com.jfoenix.controls.JFXButton
 import com.jfoenix.controls.JFXSpinner
 import com.jfoenix.controls.JFXTextField
@@ -40,6 +41,9 @@ class StartupView : View() {
                 add(labelServerIP)
                 add(tfServerIP)
                 add(btnConnect)
+
+               // tfServerIP.style { alignment=Center} TODO
+
             }
 
         }
@@ -50,12 +54,17 @@ class StartupView : View() {
         }
 
         btnConnect.setOnAction {
+            spinnerStatus.isVisible = true
             svc.btnConnectAction(tfServerIP.text)
+            spinnerStatus.isVisible = false
+
         }
 
         tfServerIP.setOnKeyPressed {
             if (it.code == KeyCode.ENTER) {
+                spinnerStatus.isVisible = true
                 svc.btnConnectAction(tfServerIP.text)
+                spinnerStatus.isVisible = false
             }
         }
 

client/src/main/kotlin/org/hso/texturesyncclient/view/startupView/StartupViewController.kt

@@ -1,25 +1,23 @@
 package org.hso.texturesyncclient.view.startupView
 
 import tornadofx.Controller
+import com.sun.org.apache.xalan.internal.xsltc.compiler.sym.PATTERN
+
+
 
 class StartupViewController : Controller() {
 
     fun btnConnectAction(txt:String){
         println("Connect BTN: $txt")
-        //TODO check IP4
 
-        spinnterStart()
-    }
+        if (validateIPv4(txt)){
+            println("valid ipv4")
+            //TODO connect to server ...
+        }else{
+            println("invalid ipv4")
+            //TODO show error
+        }
 
-    fun spinnterStart(){
-        val startupView = find(StartupView::class)
-        startupView.spinnerStatus.isVisible = true
-    }
-
-
-    fun spinnerStop(){
-        val startupView = find(StartupView::class)
-        startupView.spinnerStatus.isVisible = false
     }
 
     fun labelStatusSetText (txt:String){
@@ -27,4 +25,11 @@ class StartupViewController : Controller() {
         startupView.labelStatus.text =  txt
     }
 
-}
+    fun validateIPv4(ip: String): Boolean {
+        val regex = Regex(pattern = "^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])\$")
+        return regex.containsMatchIn(input = ip)    // matched: true
+    }
+
+}
+
+