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  """PySide6 port of the qml/tutorials/extending-qml/chapter3-bindings example from Qt v5.x"""
  
  import os
  import sys
  
  from PySide6.QtCore import Property, Signal, Slot, QUrl, Qt
  from PySide6.QtGui import QGuiApplication, QPen, QPainter, QColor
  from PySide6.QtQml import qmlRegisterType
  from PySide6.QtQuick import QQuickPaintedItem, QQuickView
  
  class PieChart (QQuickPaintedItem):
      def __init__(self, parent = None):
          QQuickPaintedItem.__init__(self, parent)
          self._name = u''
          self._color = QColor()
  
      def paint(self, painter):
          pen = QPen(self._color, 2)
          painter.setPen(pen)
          painter.setRenderHints(QPainter.Antialiasing, True)
          painter.drawPie(self.boundingRect().adjusted(1,1,-1,-1), 90 * 16, 290 * 16)
  
      def getColor(self):
          return self._color
  
      def setColor(self, value):
          if value != self._color:
              self._color = value
              self.update()
              self.colorChanged.emit()
  
      def getName(self):
          return self._name
  
      def setName(self, value):
          self._name = value
  
      colorChanged = Signal()
      color = Property(QColor, getColor, setColor, notify=colorChanged)
      name = Property(str, getName, setName)
      chartCleared = Signal()
  
      @Slot() # This should be something like @Invokable
      def clearChart(self):
          self.setColor(Qt.transparent)
          self.update()
          self.chartCleared.emit()
  
  if __name__ == '__main__':
      app = QGuiApplication(sys.argv)
  
      qmlRegisterType(PieChart, 'Charts', 1, 0, 'PieChart')
  
      view = QQuickView()
      view.setResizeMode(QQuickView.SizeRootObjectToView)
      qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
      view.setSource(QUrl.fromLocalFile(os.path.abspath(qmlFile)))
      if view.status() == QQuickView.Error:
          sys.exit(-1)
      view.show()
      res = app.exec_()
      # Deleting the view before it goes out of scope is required to make sure all child QML instances
      # are destroyed in the correct order.
      del view
      sys.exit(res)
  