finished functionality of distance traveled and track condition widget

lib/screens/Excursion/widgets/strecke_u_spurbedingungen.dart

@@ -1,8 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
-// TODO FINISH!!
-
 class StreckeUSpurbedingungen extends StatefulWidget {
   final TextEditingController kmAutoController;
   final TextEditingController kmFussController;
@@ -25,6 +23,85 @@ class StreckeUSpurbedingungen extends StatefulWidget {
 }
 
 class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
+  // vars for percent text fields
+  String carPercent = "0";
+  String footPercent = "0";
+  String bikePercent = "0";
+
+  String goodPercent = "0";
+  String middlePercent = "0";
+  String badPercent = "0";
+
+  String totalKm = "0";
+
+  @override
+  void initState() {
+    super.initState();
+    // Travle Distance 
+    widget.kmAutoController.addListener(onDistanceTravledUpdated);
+    widget.kmFussController.addListener(onDistanceTravledUpdated);
+    widget.kmRadController.addListener(onDistanceTravledUpdated);
+
+    widget.kmAutoController.text = "0";
+    widget.kmFussController.text = "0";
+    widget.kmRadController.text = "0";
+
+    // Track Conditions
+    widget.spGutController.addListener(onTrackConditionsUpdated);
+    widget.spMittelController.addListener(onTrackConditionsUpdated);
+    widget.spSchlechtController.addListener(onTrackConditionsUpdated);
+
+    widget.spGutController.text = "0";
+    widget.spMittelController.text = "0";
+    widget.spSchlechtController.text = "0";
+  }
+
+
+  void onDistanceTravledUpdated() {
+    try {
+      double kmAuto = double.parse(widget.kmAutoController.text);
+      double kmFuss = double.parse(widget.kmFussController.text);
+      double kmRad = double.parse(widget.kmRadController.text);
+      double gesKm = (kmAuto + kmFuss + kmRad);
+
+      if (gesKm == 0) {
+        carPercent = "0";
+        footPercent = "0";
+        bikePercent = "0";
+      } else {
+        carPercent = (kmAuto / gesKm * 100).round().toString();
+        footPercent = (kmFuss / gesKm * 100).round().toString();
+        bikePercent = (kmRad / gesKm * 100).round().toString();
+        totalKm = gesKm.toString();
+      }
+      setState(() {});
+    } catch (e) {
+      return;
+    }
+  }
+
+  void onTrackConditionsUpdated() {
+    try {
+      double kmGood = double.parse(widget.spGutController.text);
+      double kmMiddle = double.parse(widget.spMittelController.text);
+      double kmBad = double.parse(widget.spSchlechtController.text);
+      double gesKm = (kmGood + kmMiddle + kmBad);
+
+      if (gesKm == 0) {
+        goodPercent = "0";
+        middlePercent = "0";
+        badPercent = "0";
+      } else {
+        goodPercent = (kmGood / gesKm * 100).round().toString();
+        middlePercent = (kmMiddle / gesKm * 100).round().toString();
+        badPercent = (kmBad / gesKm * 100).round().toString();
+      }
+      setState(() {});
+    } catch (e) {
+      return;
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Column(
@@ -44,7 +121,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
               controller: widget.kmAutoController,
             )),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(carPercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),
@@ -56,7 +133,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
                     keyboardType: TextInputType.number,
                     controller: widget.kmFussController)),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(footPercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),
@@ -68,7 +145,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
                     keyboardType: TextInputType.number,
                     controller: widget.kmRadController)),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(bikePercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),
@@ -85,7 +162,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
               flex: 3,
               child: Align(
                 alignment: Alignment.bottomLeft,
-                child: Text("data"),
+                child: Text(totalKm),
               ),
             )
           ],
@@ -108,7 +185,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
                     keyboardType: TextInputType.number,
                     controller: widget.spGutController)),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(goodPercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),
@@ -120,7 +197,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
                     keyboardType: TextInputType.number,
                     controller: widget.spMittelController)),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(middlePercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),
@@ -133,7 +210,7 @@ class StreckeUSpurbedingungenState extends State<StreckeUSpurbedingungen> {
               controller: widget.spSchlechtController,
             )),
             Expanded(child: Center(child: Text("="))),
-            Expanded(child: Center(child: Text(""))),
+            Expanded(child: Center(child: Text(badPercent))),
             Expanded(child: Center(child: Text("%"))),
           ],
         ),