pagina da dashboard com cards

lib/grafico de pizza/controllers/contollers_grafico.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:playmaker/grafico%20de%20pizza/dados_grafico.dart';
+
+class PieChartController extends ChangeNotifier {
+  PieChartData _chartData = PieChartData(victories: 25, defeats: 10);
+  
+  PieChartData get chartData => _chartData;
+  
+  void updateData({int? victories, int? defeats, int? draws}) {
+    _chartData = PieChartData(
+      victories: victories ?? _chartData.victories,
+      defeats: defeats ?? _chartData.defeats,
+      draws: draws ?? _chartData.draws,
+    );
+    notifyListeners();
+  }
+  
+  void incrementVictories() {
+    updateData(victories: _chartData.victories + 1);
+  }
+  
+  void incrementDefeats() {
+    updateData(defeats: _chartData.defeats + 1);
+  }
+  
+  void reset() {
+    updateData(victories: 0, defeats: 0, draws: 0);
+  }
+}