♻️ Split up the function graph mode and solving mode
This commit is contained in:
@@ -21,6 +21,7 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
|
||||
CalculationResult? _result;
|
||||
bool _isLoading = false;
|
||||
bool _isFunctionMode = false;
|
||||
double _zoomFactor = 1.0;
|
||||
|
||||
@override
|
||||
@@ -44,11 +45,12 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
/// 生成函数图表的点
|
||||
List<FlSpot> _generatePlotPoints(String expression, double zoomFactor) {
|
||||
try {
|
||||
// 如果是方程，取左边作为函数
|
||||
String functionExpr = expression;
|
||||
if (expression.contains('=')) {
|
||||
functionExpr = expression.split('=')[0].trim();
|
||||
// 只处理 y=... 格式的函数
|
||||
String normalized = expression.replaceAll(' ', '');
|
||||
if (!normalized.toLowerCase().startsWith('y=')) {
|
||||
return [];
|
||||
}
|
||||
String functionExpr = normalized.substring(2);
|
||||
|
||||
// 如果表达式不包含 x，返回空列表
|
||||
if (!functionExpr.contains('x') && !functionExpr.contains('X')) {
|
||||
@@ -159,7 +161,19 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
if (_controller.text.isEmpty) {
|
||||
return;
|
||||
}
|
||||
|
||||
final input = _controller.text.trim();
|
||||
final normalizedInput = input.replaceAll(' ', '');
|
||||
if (normalizedInput.toLowerCase().startsWith('y=')) {
|
||||
setState(() {
|
||||
_isFunctionMode = true;
|
||||
_result = null;
|
||||
});
|
||||
return;
|
||||
}
|
||||
|
||||
setState(() {
|
||||
_isFunctionMode = false;
|
||||
_isLoading = true;
|
||||
_result = null; // 清除上次结果
|
||||
});
|
||||
@@ -197,6 +211,142 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
});
|
||||
}
|
||||
|
||||
// 构建函数图像卡片
|
||||
Widget _buildGraphCard() {
|
||||
return ListView(
|
||||
padding: EdgeInsets.only(
|
||||
left: 16,
|
||||
right: 16,
|
||||
bottom: MediaQuery.of(context).padding.bottom + 16,
|
||||
top: 16,
|
||||
),
|
||||
children: [
|
||||
Card(
|
||||
child: Padding(
|
||||
padding: const EdgeInsets.all(16.0),
|
||||
child: Column(
|
||||
children: [
|
||||
Row(
|
||||
mainAxisAlignment: MainAxisAlignment.spaceBetween,
|
||||
children: [
|
||||
Padding(
|
||||
padding: const EdgeInsets.only(left: 4),
|
||||
child: Text(
|
||||
'函数图像',
|
||||
style: Theme.of(context).textTheme.titleMedium,
|
||||
),
|
||||
),
|
||||
Row(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
children: [
|
||||
IconButton(
|
||||
onPressed: _zoomIn,
|
||||
icon: Icon(Icons.zoom_in),
|
||||
tooltip: '放大',
|
||||
padding: EdgeInsets.zero,
|
||||
visualDensity: VisualDensity.compact,
|
||||
),
|
||||
IconButton(
|
||||
onPressed: _zoomOut,
|
||||
icon: Icon(Icons.zoom_out),
|
||||
tooltip: '缩小',
|
||||
padding: EdgeInsets.zero,
|
||||
visualDensity: VisualDensity.compact,
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
const SizedBox(height: 24),
|
||||
SizedBox(
|
||||
height: 340,
|
||||
child: Builder(
|
||||
builder: (context) {
|
||||
final points = _generatePlotPoints(
|
||||
_controller.text,
|
||||
_zoomFactor,
|
||||
);
|
||||
final bounds = _calculateChartBounds(points, _zoomFactor);
|
||||
|
||||
return LineChart(
|
||||
LineChartData(
|
||||
gridData: FlGridData(show: true),
|
||||
titlesData: FlTitlesData(
|
||||
leftTitles: AxisTitles(
|
||||
sideTitles: SideTitles(
|
||||
showTitles: true,
|
||||
reservedSize: 80,
|
||||
getTitlesWidget: (value, meta) =>
|
||||
SideTitleWidget(
|
||||
axisSide: meta.axisSide,
|
||||
child: Text(value.toStringAsFixed(2)),
|
||||
),
|
||||
),
|
||||
),
|
||||
bottomTitles: AxisTitles(
|
||||
sideTitles: SideTitles(
|
||||
showTitles: true,
|
||||
reservedSize: 24,
|
||||
getTitlesWidget: (value, meta) =>
|
||||
SideTitleWidget(
|
||||
axisSide: meta.axisSide,
|
||||
child: Text(value.toStringAsFixed(2)),
|
||||
),
|
||||
),
|
||||
),
|
||||
topTitles: AxisTitles(
|
||||
sideTitles: SideTitles(showTitles: false),
|
||||
),
|
||||
rightTitles: AxisTitles(
|
||||
sideTitles: SideTitles(showTitles: false),
|
||||
),
|
||||
),
|
||||
borderData: FlBorderData(
|
||||
show: true,
|
||||
border: Border.all(
|
||||
color: Theme.of(context).colorScheme.outline,
|
||||
),
|
||||
),
|
||||
lineTouchData: LineTouchData(
|
||||
enabled: true,
|
||||
touchTooltipData: LineTouchTooltipData(
|
||||
getTooltipItems: (touchedSpots) {
|
||||
return touchedSpots.map((spot) {
|
||||
return LineTooltipItem(
|
||||
'x = ${spot.x.toStringAsFixed(2)}',
|
||||
const TextStyle(color: Colors.white),
|
||||
);
|
||||
}).toList();
|
||||
},
|
||||
),
|
||||
),
|
||||
lineBarsData: [
|
||||
LineChartBarData(
|
||||
spots: points,
|
||||
isCurved: true,
|
||||
color: Theme.of(context).colorScheme.primary,
|
||||
barWidth: 3,
|
||||
belowBarData: BarAreaData(show: false),
|
||||
dotData: FlDotData(show: false),
|
||||
),
|
||||
],
|
||||
minX: bounds.minX,
|
||||
maxX: bounds.maxX,
|
||||
minY: bounds.minY,
|
||||
maxY: bounds.maxY,
|
||||
),
|
||||
);
|
||||
},
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
),
|
||||
),
|
||||
],
|
||||
);
|
||||
}
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
return Scaffold(
|
||||
@@ -240,6 +390,8 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
Expanded(
|
||||
child: _isLoading
|
||||
? const Center(child: CircularProgressIndicator())
|
||||
: _isFunctionMode
|
||||
? _buildGraphCard()
|
||||
: _result == null
|
||||
? const Center(child: Text('请输入方程开始计算'))
|
||||
: buildResultView(_result!),
|
||||
@@ -354,129 +506,6 @@ class _CalculatorHomePageState extends State<CalculatorHomePage> {
|
||||
),
|
||||
),
|
||||
),
|
||||
const SizedBox(height: 16),
|
||||
Card(
|
||||
child: Padding(
|
||||
padding: const EdgeInsets.all(16.0),
|
||||
child: Column(
|
||||
children: [
|
||||
Row(
|
||||
mainAxisAlignment: MainAxisAlignment.spaceBetween,
|
||||
children: [
|
||||
Padding(
|
||||
padding: const EdgeInsets.only(left: 4),
|
||||
child: Text(
|
||||
'函数图像',
|
||||
style: Theme.of(context).textTheme.titleMedium,
|
||||
),
|
||||
),
|
||||
Row(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
children: [
|
||||
IconButton(
|
||||
onPressed: _zoomIn,
|
||||
icon: Icon(Icons.zoom_in),
|
||||
tooltip: '放大',
|
||||
padding: EdgeInsets.zero,
|
||||
visualDensity: VisualDensity.compact,
|
||||
),
|
||||
IconButton(
|
||||
onPressed: _zoomOut,
|
||||
icon: Icon(Icons.zoom_out),
|
||||
tooltip: '缩小',
|
||||
padding: EdgeInsets.zero,
|
||||
visualDensity: VisualDensity.compact,
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
const SizedBox(height: 24),
|
||||
SizedBox(
|
||||
height: 340,
|
||||
child: Builder(
|
||||
builder: (context) {
|
||||
final points = _generatePlotPoints(
|
||||
_controller.text,
|
||||
_zoomFactor,
|
||||
);
|
||||
final bounds = _calculateChartBounds(points, _zoomFactor);
|
||||
|
||||
return LineChart(
|
||||
LineChartData(
|
||||
gridData: FlGridData(show: true),
|
||||
titlesData: FlTitlesData(
|
||||
leftTitles: AxisTitles(
|
||||
sideTitles: SideTitles(
|
||||
showTitles: true,
|
||||
reservedSize: 40,
|
||||
getTitlesWidget: (value, meta) =>
|
||||
SideTitleWidget(
|
||||
axisSide: meta.axisSide,
|
||||
child: Text(value.toStringAsFixed(2)),
|
||||
),
|
||||
),
|
||||
),
|
||||
bottomTitles: AxisTitles(
|
||||
sideTitles: SideTitles(
|
||||
showTitles: true,
|
||||
reservedSize: 30,
|
||||
getTitlesWidget: (value, meta) =>
|
||||
SideTitleWidget(
|
||||
axisSide: meta.axisSide,
|
||||
child: Text(value.toStringAsFixed(2)),
|
||||
),
|
||||
),
|
||||
),
|
||||
topTitles: AxisTitles(
|
||||
sideTitles: SideTitles(showTitles: false),
|
||||
),
|
||||
rightTitles: AxisTitles(
|
||||
sideTitles: SideTitles(showTitles: false),
|
||||
),
|
||||
),
|
||||
borderData: FlBorderData(
|
||||
show: true,
|
||||
border: Border.all(
|
||||
color: Theme.of(context).colorScheme.outline,
|
||||
),
|
||||
),
|
||||
lineTouchData: LineTouchData(
|
||||
enabled: true,
|
||||
touchTooltipData: LineTouchTooltipData(
|
||||
getTooltipItems: (touchedSpots) {
|
||||
return touchedSpots.map((spot) {
|
||||
return LineTooltipItem(
|
||||
'x = ${spot.x.toStringAsFixed(2)}',
|
||||
const TextStyle(color: Colors.white),
|
||||
);
|
||||
}).toList();
|
||||
},
|
||||
),
|
||||
),
|
||||
lineBarsData: [
|
||||
LineChartBarData(
|
||||
spots: points,
|
||||
isCurved: true,
|
||||
color: Theme.of(context).colorScheme.primary,
|
||||
barWidth: 3,
|
||||
belowBarData: BarAreaData(show: false),
|
||||
dotData: FlDotData(show: false),
|
||||
),
|
||||
],
|
||||
minX: bounds.minX,
|
||||
maxX: bounds.maxX,
|
||||
minY: bounds.minY,
|
||||
maxY: bounds.maxY,
|
||||
),
|
||||
);
|
||||
},
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
),
|
||||
),
|
||||
],
|
||||
);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user