🎉 Initial Commit

2025-09-13 00:14:29 +08:00
commit 9c820cf762
130 changed files with 5552 additions and 0 deletions
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -0,0 +1,152 @@
+import 'package:flutter/material.dart';
+// 稍后我们会创建这个 SolverService
+import 'solver_service.dart';
+// 引入我们的数据模型
+import 'models/calculation_step.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: '方程计算器',
+      theme: ThemeData(primarySwatch: Colors.blue, useMaterial3: true),
+      home: const CalculatorHomePage(),
+    );
+  }
+}
+
+class CalculatorHomePage extends StatefulWidget {
+  const CalculatorHomePage({super.key});
+
+  @override
+  State<CalculatorHomePage> createState() => _CalculatorHomePageState();
+}
+
+class _CalculatorHomePageState extends State<CalculatorHomePage> {
+  final TextEditingController _controller = TextEditingController();
+  final SolverService _solverService = SolverService();
+
+  CalculationResult? _result;
+  bool _isLoading = false;
+
+  void _solveEquation() {
+    if (_controller.text.isEmpty) {
+      return;
+    }
+    setState(() {
+      _isLoading = true;
+      _result = null; // 清除上次结果
+    });
+
+    try {
+      // 调用核心服务来解决问题
+      final result = _solverService.solve(_controller.text);
+      setState(() {
+        _result = result;
+      });
+    } catch (e) {
+      // 错误处理
+      setState(() {
+        _result = CalculationResult(
+          steps: [],
+          finalAnswer: "错误: ${e.toString()}",
+        );
+      });
+    } finally {
+      setState(() {
+        _isLoading = false;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('方程与表达式计算器')),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          children: [
+            TextField(
+              controller: _controller,
+              decoration: const InputDecoration(
+                border: OutlineInputBorder(),
+                labelText: '输入方程或表达式',
+                hintText: '例如: 2x^2 - 8x + 6 = 0',
+              ),
+              onSubmitted: (_) => _solveEquation(),
+            ),
+            const SizedBox(height: 16),
+            ElevatedButton(onPressed: _solveEquation, child: const Text('计算')),
+            const SizedBox(height: 16),
+            const Divider(),
+            Expanded(
+              child: _isLoading
+                  ? const Center(child: CircularProgressIndicator())
+                  : _result == null
+                  ? const Center(child: Text('请输入方程开始计算'))
+                  : buildResultView(_result!),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  // 构建结果展示视图
+  Widget buildResultView(CalculationResult result) {
+    return ListView(
+      children: [
+        ...result.steps.map(
+          (step) => Card(
+            margin: const EdgeInsets.symmetric(vertical: 8),
+            child: Padding(
+              padding: const EdgeInsets.all(12.0),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(
+                    step.title,
+                    style: Theme.of(context).textTheme.titleMedium,
+                  ),
+                  const SizedBox(height: 4),
+                  Text(step.explanation),
+                  const SizedBox(height: 8),
+                  Center(
+                    child: Text(
+                      step.formula,
+                      style: const TextStyle(
+                        fontSize: 16,
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+                  ),
+                ],
+              ),
+            ),
+          ),
+        ),
+        const SizedBox(height: 10),
+        Card(
+          color: Theme.of(context).colorScheme.primaryContainer,
+          child: Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: Text(
+              "最终答案: ${result.finalAnswer}",
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(
+                color: Theme.of(context).colorScheme.onPrimaryContainer,
+              ),
+              textAlign: TextAlign.center,
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}