def paint(self, painter, option, widget):
# Paint background
brush = QBrush()
brush.setStyle(Qt.SolidPattern)
brush.setColor(self.bgcolor)
painter.fillRect(self.rect(), brush)
# Paint border
border_pen = QPen()
border_pen.setBrush(self.border_color)
border_pen.setStyle(Qt.SolidLine)
border_pen.setWidth(self.border_width)
painter.setPen(border_pen)
painter.drawRect(self.rect())
rect = self.geometry()
# Create arrows
arrow_scale = 0.25
arrow_width = rect.width() * arrow_scale
arrow_height = arrow_width * 0.8
arrow_margin = (rect.width() - arrow_width) / 2.0
brush.setColor(self.label_color)
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
arrow = None
if self.topBand == self.dest_band_item:
# Draw pointing up
arrow = QPolygon([QPoint(0, arrow_height), QPoint(arrow_width, arrow_height), QPoint(arrow_width / 2.0, 0)])
arrow.translate(self.rect().x() + arrow_margin, self.rect().y() + 1)
else:
# Draw pointing down
arrow = QPolygon([QPoint(0, 0), QPoint(arrow_width, 0), QPoint(arrow_width / 2.0, arrow_height)])
arrow.translate(self.rect().x() + arrow_margin, self.rect().y() + rect.height() - arrow_height)
painter.drawPolygon(arrow)
# Label
painter.setPen(self.label_color)
painter.rotate(-90)
fm = painter.fontMetrics()
elided = fm.elidedText(self.label, Qt.ElideRight, rect.height())
twidth = fm.width(elided)
painter.drawText(-twidth - (rect.height() - twidth) / 2, rect.width() - 2, elided)
