View difference between Paste ID: vbk9y2JZ and yWACCHH0

 from PyQt4 import QtCore, QtGui
 
 
 class StatusWidgetBar(QtGui.QComboBox):
     def __init__(self, parent=None):
         super(StatusWidgetBar, self).__init__(parent)
-
+
         self.addItems(['waiting', 'in progress', 'finished'])
 
-        painter.setRenderHint(QtGui.QPainter.Antialiasing)
+
-        parent = self.parentWidget()
+        super(StatusWidgetBar, self).paintEvent(event)
-        progress = self.currentIndex() * .5
+
         progressBarStyleOption = QtGui.QStyleOptionProgressBar()
-        painter.setPen(QtGui.QColor(0,0,0,0))
+        progressBarStyleOption.rect = QtCore.QRect(0, 0, (self.width()), self.height())
-        if progress <= .5:
+        progressBarStyleOption.minimum = 0
-            painter.setBrush(QtGui.QColor(255, 140, 30))
+        progressBarStyleOption.maximum = self.count()
-        else:
+        progressBarStyleOption.textAlignment = QtCore.Qt.AlignCenter
-            painter.setBrush(QtGui.QColor('darkGreen'))
+        progressBarStyleOption.progress = self.currentIndex()
         progressBarStyleOption.textVisible = True
-        barRect = QtCore.QRect(0, 0, (self.width()) * progress, self.height())
+        painter.setOpacity(0.5)
-        painter.drawRect(barRect)
+        QtGui.qApp.style().drawControl(QtGui.QStyle.CE_ProgressBar, progressBarStyleOption, painter)
 
 
 app = QtGui.QApplication([])
 w = StatusWidgetBar()
 w.show()
 app.exec_()