feat: enhanced line chart curve function

huanghui1998hhh · huanghui1998hhh · commit fcdb81ae234b · 2025-09-17T17:22:37.000+08:00
diff --git a/example/lib/presentation/samples/bar/bar_chart_sample7.dart b/example/lib/presentation/samples/bar/bar_chart_sample7.dart
@@ -230,7 +230,8 @@ class _IconWidgetState extends AnimatedWidgetBaseState<_IconWidget> {
     final rotation = math.pi * 4 * _rotationTween!.evaluate(animation);
     final scale = 1 + _rotationTween!.evaluate(animation) * 0.5;
     return Transform(
-      transform: Matrix4.rotationZ(rotation).scaledByDouble(scale, scale, scale, 1.0),
+      transform:
+          Matrix4.rotationZ(rotation).scaledByDouble(scale, scale, scale, 1.0),
       origin: const Offset(14, 14),
       child: Icon(
         widget.isSelected ? Icons.face_retouching_natural : Icons.face,
diff --git a/example/lib/presentation/samples/line/line_chart_sample1.dart b/example/lib/presentation/samples/line/line_chart_sample1.dart
@@ -185,7 +185,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData1_1 => LineChartBarData(
-        isCurved: true,
+        curve: const LineChartCubicTensionCurve(),
         color: AppColors.contentColorGreen,
         barWidth: 8,
         isStrokeCapRound: true,
@@ -203,7 +203,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData1_2 => LineChartBarData(
-        isCurved: true,
+        curve: const LineChartCubicTensionCurve(),
         color: AppColors.contentColorPink,
         barWidth: 8,
         isStrokeCapRound: true,
@@ -223,7 +223,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData1_3 => LineChartBarData(
-        isCurved: true,
+        curve: const LineChartCubicTensionCurve(),
         color: AppColors.contentColorCyan,
         barWidth: 8,
         isStrokeCapRound: true,
@@ -239,8 +239,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData2_1 => LineChartBarData(
-        isCurved: true,
-        curveSmoothness: 0,
+        curve: LineChartCurve.noCurve,
         color: AppColors.contentColorGreen.withValues(alpha: 0.5),
         barWidth: 4,
         isStrokeCapRound: true,
@@ -258,7 +257,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData2_2 => LineChartBarData(
-        isCurved: true,
+        curve: const LineChartCubicTensionCurve(),
         color: AppColors.contentColorPink.withValues(alpha: 0.5),
         barWidth: 4,
         isStrokeCapRound: true,
@@ -278,8 +277,7 @@ class _LineChart extends StatelessWidget {
       );
 
   LineChartBarData get lineChartBarData2_3 => LineChartBarData(
-        isCurved: true,
-        curveSmoothness: 0,
+        curve: LineChartCurve.noCurve,
         color: AppColors.contentColorCyan.withValues(alpha: 0.5),
         barWidth: 2,
         isStrokeCapRound: true,
diff --git a/example/lib/presentation/samples/line/line_chart_sample10.dart b/example/lib/presentation/samples/line/line_chart_sample10.dart
@@ -119,7 +119,7 @@ class _LineChartSample10State extends State<LineChartSample10> {
         stops: const [0.1, 1.0],
       ),
       barWidth: 4,
-      isCurved: false,
+      curve: LineChartCurve.noCurve,
     );
   }
 
@@ -134,7 +134,7 @@ class _LineChartSample10State extends State<LineChartSample10> {
         stops: const [0.1, 1.0],
       ),
       barWidth: 4,
-      isCurved: false,
+      curve: LineChartCurve.noCurve,
     );
   }
 
diff --git a/example/lib/presentation/samples/line/line_chart_sample13.dart b/example/lib/presentation/samples/line/line_chart_sample13.dart
@@ -172,7 +172,7 @@ class _LineChartSample13State extends State<LineChartSample13> {
                               ),
                             );
                           }).toList(),
-                          isCurved: false,
+                          curve: LineChartCurve.noCurve,
                           dotData: const FlDotData(show: false),
                           color: AppColors.contentColorBlue,
                           barWidth: 1,
diff --git a/example/lib/presentation/samples/line/line_chart_sample2.dart b/example/lib/presentation/samples/line/line_chart_sample2.dart
@@ -173,7 +173,7 @@ class _LineChartSample2State extends State<LineChartSample2> {
             FlSpot(9.5, 3),
             FlSpot(11, 4),
           ],
-          isCurved: true,
+          curve: const LineChartCubicTensionCurve(),
           gradient: LinearGradient(
             colors: gradientColors,
           ),
@@ -260,7 +260,7 @@ class _LineChartSample2State extends State<LineChartSample2> {
             FlSpot(9.5, 3.44),
             FlSpot(11, 3.44),
           ],
-          isCurved: true,
+          curve: const LineChartCubicTensionCurve(),
           gradient: LinearGradient(
             colors: [
               ColorTween(begin: gradientColors[0], end: gradientColors[1])
diff --git a/example/lib/presentation/samples/line/line_chart_sample3.dart b/example/lib/presentation/samples/line/line_chart_sample3.dart
@@ -299,7 +299,7 @@ class _LineChartSample3State extends State<LineChartSample3> {
                     spots: widget.yValues.asMap().entries.map((e) {
                       return FlSpot(e.key.toDouble(), e.value);
                     }).toList(),
-                    isCurved: false,
+                    curve: LineChartCurve.noCurve,
                     barWidth: 4,
                     color: widget.lineColor,
                     belowBarData: BarAreaData(
diff --git a/example/lib/presentation/samples/line/line_chart_sample4.dart b/example/lib/presentation/samples/line/line_chart_sample4.dart
@@ -119,7 +119,7 @@ class LineChartSample4 extends StatelessWidget {
                   FlSpot(10, 6),
                   FlSpot(11, 7),
                 ],
-                isCurved: true,
+                curve: const LineChartCubicTensionCurve(),
                 barWidth: 8,
                 color: mainLineColor,
                 belowBarData: BarAreaData(
diff --git a/example/lib/presentation/samples/line/line_chart_sample5.dart b/example/lib/presentation/samples/line/line_chart_sample5.dart
@@ -82,7 +82,7 @@ class _LineChartSample5State extends State<LineChartSample5> {
       LineChartBarData(
         showingIndicators: showingTooltipOnSpots,
         spots: allSpots,
-        isCurved: true,
+        curve: const LineChartCubicTensionCurve(),
         barWidth: 4,
         shadow: const Shadow(
           blurRadius: 8,
diff --git a/example/lib/presentation/samples/line/line_chart_sample6.dart b/example/lib/presentation/samples/line/line_chart_sample6.dart
@@ -165,7 +165,7 @@ class LineChartSample6 extends StatelessWidget {
                   ],
                 ),
                 spots: reverseSpots(spots, minSpotY, maxSpotY),
-                isCurved: true,
+                curve: const LineChartCubicTensionCurve(),
                 isStrokeCapRound: true,
                 barWidth: 10,
                 belowBarData: BarAreaData(
@@ -195,7 +195,7 @@ class LineChartSample6 extends StatelessWidget {
                   ],
                 ),
                 spots: reverseSpots(spots2, minSpotY, maxSpotY),
-                isCurved: true,
+                curve: const LineChartCubicTensionCurve(),
                 isStrokeCapRound: true,
                 barWidth: 10,
                 belowBarData: BarAreaData(
diff --git a/example/lib/presentation/samples/line/line_chart_sample7.dart b/example/lib/presentation/samples/line/line_chart_sample7.dart
@@ -113,7 +113,7 @@ class LineChartSample7 extends StatelessWidget {
                   FlSpot(10, 6),
                   FlSpot(11, 7),
                 ],
-                isCurved: true,
+                curve: const LineChartCubicTensionCurve(),
                 barWidth: 2,
                 color: line1Color,
                 dotData: const FlDotData(
@@ -135,7 +135,7 @@ class LineChartSample7 extends StatelessWidget {
                   FlSpot(10, 1),
                   FlSpot(11, 3),
                 ],
-                isCurved: false,
+                curve: LineChartCurve.noCurve,
                 barWidth: 2,
                 color: line2Color,
                 dotData: const FlDotData(
diff --git a/example/lib/presentation/samples/line/line_chart_sample8.dart b/example/lib/presentation/samples/line/line_chart_sample8.dart
@@ -277,7 +277,7 @@ class _LineChartSample8State extends State<LineChartSample8> {
             FlSpot(11, 2.5),
           ],
           dashArray: [10, 6],
-          isCurved: true,
+          curve: const LineChartCubicTensionCurve(),
           color: AppColors.contentColorRed,
           barWidth: 4,
           isStrokeCapRound: true,
diff --git a/example/lib/presentation/samples/line/line_chart_sample9.dart b/example/lib/presentation/samples/line/line_chart_sample9.dart
@@ -82,7 +82,7 @@ class LineChartSample9 extends StatelessWidget {
                   LineChartBarData(
                     color: AppColors.contentColorPink,
                     spots: spots,
-                    isCurved: true,
+                    curve: const LineChartCubicTensionCurve(),
                     isStrokeCapRound: true,
                     barWidth: 3,
                     belowBarData: BarAreaData(
diff --git a/lib/fl_chart.dart b/lib/fl_chart.dart
@@ -9,6 +9,7 @@ export 'src/chart/base/base_chart/fl_touch_event.dart';
 export 'src/chart/candlestick_chart/candlestick_chart.dart';
 export 'src/chart/candlestick_chart/candlestick_chart_data.dart';
 export 'src/chart/line_chart/line_chart.dart';
+export 'src/chart/line_chart/line_chart_curve.dart';
 export 'src/chart/line_chart/line_chart_data.dart';
 export 'src/chart/pie_chart/pie_chart.dart';
 export 'src/chart/pie_chart/pie_chart_data.dart';
diff --git a/lib/src/chart/line_chart/line_chart_curve.dart b/lib/src/chart/line_chart/line_chart_curve.dart
diff --git a/lib/src/chart/line_chart/line_chart_data.dart b/lib/src/chart/line_chart/line_chart_data.dart
diff --git a/lib/src/chart/line_chart/line_chart_painter.dart b/lib/src/chart/line_chart/line_chart_painter.dart
diff --git a/test/chart/data_pool.dart b/test/chart/data_pool.dart
