title: How to add an image in pyqt qdock widget
body: <p>I am trying to create a image viewer using pyqt. What i am trying is to create a qdockwidget to display the image. I have created the qPixmap objecte and tried to add it as a widget in qdockwidget.</p>
  
  <pre><code>from PyQt5 import QtWidgets, QtGui
  from PyQt5.QtWidgets import (QApplication, QMainWindow)
  from PyQt5.QtCore import Qt
  
  from reportlab.graphics.charts.piecharts import Pie
  from reportlab.graphics.shapes import *
  
  from PIL import ImageQt
  
  from reportlab.graphics import renderPM
  
  class MainWindow(QMainWindow):
      def __init__(self):
          super().__init__()
          self.resize(800, 600)
  
          dockWidget = QtWidgets.QDockWidget()
          dockWidget.setWindowTitle("Image Viewer")
  
          d = Drawing(200, 100)
          pc = Pie()
          pc.x = 65
          pc.y = 0
          pc.width = 100
          pc.height = 100
          pc.data = [10, 20, 30, 40, 50, 60]
          pc.labels = ['a', 'b', 'c', 'd', 'e', 'f']
          pc.slices.strokeWidth = 0.5
          pc.slices[3].popout = 10
          pc.slices[3].strokeWidth = 2
          pc.slices[3].strokeDashArray = [2, 2]
          pc.slices[3].labelRadius = 1.75
          pc.slices[3].fontColor = colors.red
          d.add(pc)
  
          test = renderPM.drawToPILP(d)
  
          QtImage1 = ImageQt.ImageQt(test)
          QtImage2 = QtGui.QImage(QtImage1)
          pixmap = QtGui.QPixmap.fromImage(QtImage2)
          label = QtWidgets.QLabel('testing', self)
          label.setPixmap(pixmap)
  
          #dockWidget.setWidget(pixmap)
          dockWidget.setFloating(False)
          self.addDockWidget(Qt.RightDockWidgetArea, dockWidget)
  
  
  if __name__ == '__main__':
      app = QApplication(sys.argv)
      myWidget = MainWindow()
      myWidget.show()
  
      sys.exit(app.exec_())
  </code></pre>