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adding textures to each segment #98

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adding textures to each segment #98

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e2b5914
adding textures to each segment
CarlosRA97 Apr 26, 2023
7d3867f
adding documentation and an example of textures
CarlosRA97 May 8, 2023
49c2284
adding image example
CarlosRA97 May 8, 2023
e82ed86
fix on extension of image sample
CarlosRA97 May 8, 2023
cb5e41c
Update pie_chart.dart
CarlosRA97 Jul 5, 2023
7043be5
Update chart_painter.dart
CarlosRA97 Jul 5, 2023
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23 changes: 22 additions & 1 deletion lib/src/chart_painter.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ class PieChartPainter extends CustomPainter {
final Color? emptyColor;
final List<List<Color>>? gradientList;
final List<Color>? emptyColorGradient;
final List<ImageShader>? textureList;
final DegreeOptions degreeOptions;
final Color baseChartColor;
final double? totalValue;
Expand Down Expand Up @@ -54,6 +55,7 @@ class PieChartPainter extends CustomPainter {
this.emptyColor,
this.gradientList,
this.emptyColorGradient,
this.textureList,
this.degreeOptions = const DegreeOptions(),
required this.baseChartColor,
this.totalValue,
Expand All @@ -65,14 +67,16 @@ class PieChartPainter extends CustomPainter {
_total = totalValue!;
}

if (gradientList?.isEmpty ?? true) {
if ((gradientList?.isEmpty ?? true) && (textureList?.isEmpty ?? true)) {
for (int i = 0; i < values.length; i++) {
final paint = Paint()..color = getColor(colorList, i);
setPaintProps(paint);
_paintList.add(paint);
}
}



_totalAngle = angleFactor * doublePi * drawPercentage;
_subParts = values;
_prevAngle = degreeToRadian(degreeOptions.initialAngle);
Expand Down Expand Up @@ -136,6 +140,7 @@ class PieChartPainter extends CustomPainter {
final isGradientPresent = gradientList?.isNotEmpty ?? false;
final isNonGradientElementPresent =
(_subParts.length - (gradientList?.length ?? 0)) > 0;
final isTexturePresent = textureList?.isNotEmpty ?? false;

for (int i = 0; i < _subParts.length; i++) {
if (isGradientPresent) {
Expand All @@ -152,6 +157,22 @@ class PieChartPainter extends CustomPainter {
emptyColorGradient: emptyColorGradient!),
);
paint.shader = gradient.createShader(boundingSquare);
if (chartType == ChartType.ring) {
paint.style = PaintingStyle.stroke;
paint.strokeWidth = strokeWidth!;
paint.strokeCap = StrokeCap.butt;
}
canvas.drawArc(
boundingSquare,
_prevAngle,
endAngle,
useCenter,
paint,
);
} else if (isTexturePresent) {
final endAngle = (((_totalAngle) / _total) * _subParts[i]);
final paint = Paint()..shader = textureList![i];

if (chartType == ChartType.ring) {
paint.style = PaintingStyle.stroke;
paint.strokeWidth = strokeWidth!;
Expand Down
3 changes: 3 additions & 0 deletions lib/src/pie_chart.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ class PieChart extends StatefulWidget {
this.emptyColor = Colors.grey,
this.gradientList,
this.emptyColorGradient = const [Colors.black26, Colors.black54],
this.textureList,
this.legendLabels = const {},
Key? key,
this.degreeOptions = const DegreeOptions(),
Expand All @@ -41,6 +42,7 @@ class PieChart extends StatefulWidget {
final double chartLegendSpacing;
final List<Color> colorList;
final List<List<Color>>? gradientList;
final List<ImageShader>? textureList;
@Deprecated('use degreeOptions. instead')
final double? initialAngleInDegree;
final Function? formatChartValues;
Expand Down Expand Up @@ -146,6 +148,7 @@ class _PieChartState extends State<PieChart>
emptyColor: widget.emptyColor,
gradientList: widget.gradientList,
emptyColorGradient: widget.emptyColorGradient,
textureList: widget.textureList,
degreeOptions: widget.degreeOptions.copyWith(
// because we've deprecated initialAngleInDegree,
// we want the old value to be used if it's not null
Expand Down