fix: some adjustments for estimation questions

QuizApp/Resources/questions.json

@@ -184,21 +184,61 @@
         }
     ],
     "Schätzen": [
-      {
-        "type": "estimation",
-        "question": "Wie hoch ist der Eiffelturm?",
-        "minValue": 0,
-        "maxValue": 1000,
-        "correctValue": 330,
-        "unit": "m"
-      },
-      {
-        "type": "estimation",
-        "question": "In welchem Jahr begann der Bau des Kölner Doms?",
-        "minValue": 1000,
-        "maxValue": 2025,
-        "correctValue": 1248,
-        "unit": "Jahr"
-      }
+        {
+            "type": "estimation",
+            "question": "Wie hoch ist der Eiffelturm?",
+            "minValue": 100,
+            "maxValue": 350,
+            "correctValue": 330,
+            "unit": "m"
+        },
+        {
+            "type": "estimation",
+            "question": "In welchem Jahr begann der Bau des Kölner Doms?",
+            "minValue": 1000,
+            "maxValue": 1900,
+            "correctValue": 1248,
+            "unit": "Jahr"
+        },
+        {
+            "type": "estimation",
+            "question": "Wie weit ist die Entfernung zwischen Berlin und New York (Luftlinie)?",
+            "minValue": 5000,
+            "maxValue": 10000,
+            "correctValue": 6380,
+            "unit": "km"
+        },
+        {
+            "type": "estimation",
+            "question": "Wie hoch ist der Mount Everest?",
+            "minValue": 2000,
+            "maxValue": 10000,
+            "correctValue": 8848,
+            "unit": "m"
+        },
+        {
+            "type": "estimation",
+            "question": "Wie viele Kilometer beträgt der Äquatorumfang der Erde?",
+            "minValue": 20000,
+            "maxValue": 50000,
+            "correctValue": 40075,
+            "unit": "km"
+        },
+        {
+            "type": "estimation",
+            "question": "Wie tief ist der Marianengraben?",
+            "minValue": 1000,
+            "maxValue": 20000,
+            "correctValue": 11000,
+            "unit": "m"
+        },
+        {
+            "type": "estimation",
+            "question": "In welchem Jahr wurde die Glühbirne von Thomas Edison patentiert?",
+            "minValue": 1700,
+            "maxValue": 2000,
+            "correctValue": 1879,
+            "unit": ""
+        }
     ]
 }

QuizApp/ViewModels/ViewModel.swift

@@ -79,20 +79,16 @@ class ViewModel: ObservableObject {
     func pointsForEstimation(
         guess: Double,
         correct: Double,
-        minValue: Double,
-        maxValue: Double,
-        maxPoints: Int = 3,
-        thresholdPercent: Double = 0.3
+        maxPoints: Int = 1,
+        
     ) -> Int {
-        let span = maxValue - minValue
-        guard span > 0 else { return 0 }
+        let absError = abs(guess - correct) // Absolute Abweichung
+        let relError = absError / abs(correct) // Relative Abweichung
         
-        let absError = abs(guess - correct)
-        let relError = absError / span
-        
-        if relError >= thresholdPercent { return 0 }
-        
-        let ratio = 1.0 - (relError / thresholdPercent)
-        return max(0, Int(round(Double(maxPoints) * ratio)))
+        if relError <= 0.1 {
+            return maxPoints
+        } else {
+            return 0
+        }
     }
 }

QuizApp/Views/EstimationQuestionView.swift

@@ -7,33 +7,27 @@
 import SwiftUI
 
 struct EstimationQuestionView: View {
+    let questionID: AnyHashable   // <- neu
     let minValue: Double
     let maxValue: Double
     let correctValue: Double
     let unit: String
     let viewModel: ViewModel
-    
+
     @Binding var value: Double
     @Binding var submitted: Bool
     @Binding var gainedPoints: Int
     let onSubmit: (Int) -> Void
-    
+
     var body: some View {
         VStack(spacing: 16) {
             Slider(
-                value: Binding(
-                    get: { value },
-                    set: { value = min(max($0, minValue), maxValue) } // clamp
-                ),
+                value: $value,
                 in: minValue...maxValue,
                 step: (maxValue - minValue) > 200 ? 1 : 0.5
             )
-            .onAppear {
-                if value < minValue || value > maxValue {
-                    value = (minValue + maxValue) / 2
-                }
-            }
-            
+            .disabled(submitted)
+
             HStack {
                 Text("\(Int(minValue)) \(unit)")
                 Spacer()
@@ -42,14 +36,12 @@ struct EstimationQuestionView: View {
                 Text("\(Int(maxValue)) \(unit)")
             }
             .font(.caption)
-            
+
             if !submitted {
                 Button {
                     gainedPoints = viewModel.pointsForEstimation(
                         guess: value,
-                        correct: correctValue,
-                        minValue: minValue,
-                        maxValue: maxValue
+                        correct: correctValue
                     )
                     submitted = true
                     onSubmit(gainedPoints)
@@ -66,7 +58,7 @@ struct EstimationQuestionView: View {
                 let diff = abs(value - correctValue)
                 let span = maxValue - minValue
                 let rel = span > 0 ? (diff / span) : 1.0
-                
+
                 Text("✅ Richtiger Wert: \(Int(correctValue)) \(unit)")
                     .font(.headline)
                     .foregroundColor(.green)
@@ -78,5 +70,12 @@ struct EstimationQuestionView: View {
             }
         }
         .padding(.horizontal)
+        // bei jedem Fragewechsel
+        .task(id: questionID) {
+            value = minValue
+            submitted = false
+            gainedPoints = 0
+        }
     }
 }
+

QuizApp/Views/QuizView.swift

@@ -67,6 +67,7 @@ struct QuizView: View {
                    let correctV = frage.correctValue {
                     //  Estimation
                     EstimationQuestionView(
+                        questionID: viewModel.currentQuestionIndex,   // <- neu
                         minValue: minV,
                         maxValue: maxV,
                         correctValue: correctV,
@@ -85,7 +86,6 @@ struct QuizView: View {
                     if estimationSubmitted {
                         Button {
                             viewModel.loadNextQuestion()
-                            // Reset für nächste Estimation
                             estimationSubmitted = false
                             isAnswered = false
                             selectedAnswerIndex = nil