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Stop the chart from rotating when embedded in a scroll view. #103

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Stop the chart from rotating when embedded in a scroll view. #103

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11 changes: 6 additions & 5 deletions lib/src/chart_painter.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -132,13 +132,14 @@ class PieChartPainter extends CustomPainter {
} else {
final isGradientPresent = gradientList?.isNotEmpty ?? false;
final isNonGradientElementPresent = (_subParts.length - (gradientList?.length ?? 0)) > 0;
var subPartAngle = _prevAngle;

for (int i = 0; i < _subParts.length; i++) {
if (isGradientPresent) {
final endAngle = (((_totalAngle) / _total) * _subParts[i]);
final paint = Paint();

final normalizedPrevAngle = (_prevAngle - 0.15) % doublePi;
final normalizedPrevAngle = (subPartAngle - 0.15) % doublePi;
final normalizedEndAngle = (endAngle + 0.15) % doublePi;
final Gradient gradient = SweepGradient(
transform: GradientRotation(normalizedPrevAngle),
Expand All @@ -154,23 +155,23 @@ class PieChartPainter extends CustomPainter {
}
canvas.drawArc(
boundingSquare,
_prevAngle,
subPartAngle,
endAngle,
useCenter,
paint,
);
} else {
canvas.drawArc(
boundingSquare,
_prevAngle,
subPartAngle,
((_totalAngle / _total) * _subParts[i]),
useCenter,
_paintList[i],
);
}

final radius = showChartValuesOutside ? (side / 2) + 16 : side / 3;
final radians = _prevAngle + (((_totalAngle / _total) * _subParts[i]) / 2);
final radians = subPartAngle + (((_totalAngle / _total) * _subParts[i]) / 2);
final x = (radius) * math.cos(radians);
final y = (radius) * math.sin(radians);

Expand All @@ -188,7 +189,7 @@ class PieChartPainter extends CustomPainter {
_drawName(canvas, name, x, y, side);
}
}
_prevAngle = _prevAngle + (((_totalAngle) / _total) * _subParts[i]);
subPartAngle = subPartAngle + (((_totalAngle) / _total) * _subParts[i]);
}
}

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