PieChartMain.swift

struct PieChart: View {
    @State private var selectedCell: UUID = UUID()
    
    let dataModel: ChartDataModel
    let onTap: (ChartCellModel?) -> ()
    var body: some View {
            ZStack {
                ForEach(dataModel.chartCellModel) { dataSet in
                    PieChartCell(startAngle: self.dataModel.angle(for: dataSet.value), endAngle: self.dataModel.startingAngle)
                        .foregroundColor(dataSet.color)
                       .onTapGesture {
                         withAnimation {
                            if self.selectedCell == dataSet.id {
                                self.onTap(nil)
                                self.selectedCell = UUID()
                            } else {
                                self.selectedCell = dataSet.id
                                self.onTap(dataSet)
                            }
                        }
                    }.scaleEffect((self.selectedCell == dataSet.id) ? 1.05 : 1.0)
                }
            }
    }
}