Fix pieChart drawing single section on iPhone, #1515

imaNNeo · Dec 15, 2023 · c5b3bf2 · c5b3bf2
1 parent e9ab493
commit c5b3bf2
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Showing 2 changed files with 22 additions and 6 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -24,6 +24,7 @@ ScatterSpot(
 ),
 ```
 * **BUGFIX** (by @imaNNeo) Fix barChart tooltip for values below or above the 0 point, #1462
+* **BUGFIX** (by @imaNNeo) Fix pieChart drawing single section on iPhone, #1515
 
 ## 0.65.0
 * **FEATURE** (by @Dartek12) Added gradient to [FlLine](https://github.com/imaNNeo/fl_chart/blob/master/repo_files/documentations/base_chart.md#FlLine), #1197

diff --git a/lib/src/chart/pie_chart/pie_chart_painter.dart b/lib/src/chart/pie_chart/pie_chart_painter.dart
@@ -21,11 +21,15 @@ class PieChartPainter extends BaseChartPainter<PieChartData> {
   PieChartPainter() : super() {
     _sectionPaint = Paint()..style = PaintingStyle.stroke;
 
+    _sectionSaveLayerPaint = Paint();
+
     _sectionStrokePaint = Paint()..style = PaintingStyle.stroke;
 
     _centerSpacePaint = Paint()..style = PaintingStyle.fill;
   }
+
   late Paint _sectionPaint;
+  late Paint _sectionSaveLayerPaint;
   late Paint _sectionStrokePaint;
   late Paint _centerSpacePaint;
 
@@ -100,13 +104,24 @@ class PieChartPainter extends BaseChartPainter<PieChartData> {
       if (sectionDegree == 360) {
         _sectionPaint
           ..color = section.color
-          ..strokeWidth = section.radius
-          ..style = PaintingStyle.stroke;
-        canvasWrapper.drawCircle(
-          center,
-          centerRadius + section.radius / 2,
-          _sectionPaint,
+          ..style = PaintingStyle.fill;
+        final bounds = Rect.fromCircle(
+          center: center,
+          radius: centerRadius + section.radius,
         );
+        canvasWrapper
+          ..saveLayer(bounds, _sectionSaveLayerPaint)
+          ..drawCircle(
+            center,
+            centerRadius + section.radius,
+            _sectionPaint..blendMode = BlendMode.srcOver,
+          )
+          ..drawCircle(
+            center,
+            centerRadius,
+            _sectionPaint..blendMode = BlendMode.srcOut,
+          )
+          ..restore();
         if (section.borderSide.width != 0.0 &&
             section.borderSide.color.opacity != 0.0) {
           _sectionStrokePaint