title: How can an image to be displayed on a qdialog?
body: <p>Pls help on this code, cuz i don't really get the concept.
  I start a dialog by clicking a button on a qwidget.
  I also would like to display an image on the aforementiond qdialog by clicking on a different button (img_btn) on the dialog .
  I have added some code below:</p>
  
  <pre><code>from PyQt4.QtCore import *
  from PyQt4.QtGui import *
  import sys
  
  class BasicWidget(QWidget):
      def __init__(self, parent=None):
          super(BasicWidget, self).__init__()
  
          layout = QVBoxLayout()
          self.btn = QPushButton('Show Dialog')
          layout.addWidget(self.btn)
          self.setLayout(layout)
          self.show()
  
          self.btn.clicked.connect(self.showpic)
  
      def showpic(self):
          imgshow = PaintPicture()
  
  class PaintPicture(QDialog):
      def __init__(self, parent=None):
          super(PaintPicture, self).__init__()
  
          layout = QVBoxLayout()
          self.img_btn = QPushButton('Enter')
          layout.addWidget(self.img_btn)
  
          filename = r'\\some\basic\picture.jpg'
          image = QImage(filename )
  
          self.imageLabel = QLabel()
          self.imageLabel.setPixmap(QPixmap.fromImage(image))
  
          layout.addWidget(self.imageLabel)
  
          self.setLayout(layout)
          self.show()
  
  if __name__ =="__main__":
      app = QApplication(sys.argv)
      widget = BasicWidget()
      sys.exit(app.exec_())
  </code></pre>