def init(self, parent):
"""
"""
rad = self.factory.radius
if not rad:
rad = 20
if self.control is None:
scene = QGraphicsScene()
# system background color
scene.setBackgroundBrush(QBrush(QColor(237, 237, 237)))
x, y = 10, 10
cx = x + rad / DIAMETER_SCALAR
cy = y + rad / DIAMETER_SCALAR
self.colors = [QColor(ci) for ci in self.factory.colors]
brush = get_gradient(self.colors[self.value], cx, cy, rad / 2)
pen = QPen()
pen.setWidth(0)
self._led_ellipse = scene.addEllipse(x, y, rad, rad, pen=pen, brush=brush)
ctrl = LEDGraphicsView(rad, scene)
layout = QVBoxLayout()
layout.addWidget(ctrl)
layout.setAlignment(ctrl, Qt.AlignHCenter)
if self.factory.label:
txt = QLabel(self.factory.label)
layout.addWidget(txt)
layout.setAlignment(txt, Qt.AlignHCenter)
self.control = QWidget()
self.control.setLayout(layout)
