text: 
  ############################################################################
  ##
  ## Copyright (C) 2013 Riverbank Computing Limited.
  ## Copyright (C) 2016 The Qt Company Ltd.
  ## Contact: http://www.qt.io/licensing/
  ##
  ## This file is part of the Qt for Python examples of the Qt Toolkit.
  ##
  ## $QT_BEGIN_LICENSE:BSD$
  ## You may use this file under the terms of the BSD license as follows:
  ##
  ## "Redistribution and use in source and binary forms, with or without
  ## modification, are permitted provided that the following conditions are
  ## met:
  ##   * Redistributions of source code must retain the above copyright
  ##     notice, this list of conditions and the following disclaimer.
  ##   * Redistributions in binary form must reproduce the above copyright
  ##     notice, this list of conditions and the following disclaimer in
  ##     the documentation and/or other materials provided with the
  ##     distribution.
  ##   * Neither the name of The Qt Company Ltd nor the names of its
  ##     contributors may be used to endorse or promote products derived
  ##     from this software without specific prior written permission.
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  ## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  #############################################################################
  
  """PySide2 port of the widgets/layouts/flowlayout example from Qt v5.x"""
  
  from PySide2 import QtCore, QtGui, QtWidgets
  
  
  class Window(QtWidgets.QWidget):
      def __init__(self):
          super(Window, self).__init__()
  
          flowLayout = FlowLayout()
          flowLayout.addWidget(QtWidgets.QPushButton("Short"))
          flowLayout.addWidget(QtWidgets.QPushButton("Longer"))
          flowLayout.addWidget(QtWidgets.QPushButton("Different text"))
          flowLayout.addWidget(QtWidgets.QPushButton("More text"))
          flowLayout.addWidget(QtWidgets.QPushButton("Even longer button text"))
          self.setLayout(flowLayout)
  
          self.setWindowTitle("Flow Layout")
  
  
  class FlowLayout(QtWidgets.QLayout):
      def __init__(self, parent=None, margin=0, spacing=-1):
          super(FlowLayout, self).__init__(parent)
  
          if parent is not None:
              self.setMargin(margin)
  
          self.setSpacing(spacing)
  
          self.itemList = []
  
      def __del__(self):
          item = self.takeAt(0)
          while item:
              item = self.takeAt(0)
  
      def addItem(self, item):
          self.itemList.append(item)
  
      def count(self):
          return len(self.itemList)
  
      def itemAt(self, index):
          if index >= 0 and index < len(self.itemList):
              return self.itemList[index]
  
          return None
  
      def takeAt(self, index):
          if index >= 0 and index < len(self.itemList):
              return self.itemList.pop(index)
  
          return None
  
      def expandingDirections(self):
          return QtCore.Qt.Orientations(QtCore.Qt.Orientation(0))
  
      def hasHeightForWidth(self):
          return True
  
      def heightForWidth(self, width):
          height = self.doLayout(QtCore.QRect(0, 0, width, 0), True)
          return height
  
      def setGeometry(self, rect):
          super(FlowLayout, self).setGeometry(rect)
          self.doLayout(rect, False)
  
      def sizeHint(self):
          return self.minimumSize()
  
      def minimumSize(self):
          size = QtCore.QSize()
  
          for item in self.itemList:
              size = size.expandedTo(item.minimumSize())
  
          size += QtCore.QSize(2 * self.contentsMargins().top(), 2 * self.contentsMargins().top())
          return size
  
      def doLayout(self, rect, testOnly):
          x = rect.x()
          y = rect.y()
          lineHeight = 0
  
          for item in self.itemList:
              wid = item.widget()
              spaceX = self.spacing() + wid.style().layoutSpacing(QtWidgets.QSizePolicy.PushButton, QtWidgets.QSizePolicy.PushButton, QtCore.Qt.Horizontal)
              spaceY = self.spacing() + wid.style().layoutSpacing(QtWidgets.QSizePolicy.PushButton, QtWidgets.QSizePolicy.PushButton, QtCore.Qt.Vertical)
              nextX = x + item.sizeHint().width() + spaceX
              if nextX - spaceX > rect.right() and lineHeight > 0:
                  x = rect.x()
                  y = y + lineHeight + spaceY
                  nextX = x + item.sizeHint().width() + spaceX
                  lineHeight = 0
  
              if not testOnly:
                  item.setGeometry(QtCore.QRect(QtCore.QPoint(x, y), item.sizeHint()))
  
              x = nextX
              lineHeight = max(lineHeight, item.sizeHint().height())
  
          return y + lineHeight - rect.y()
  
  
  if __name__ == '__main__':
  
      import sys
  
      app = QtWidgets.QApplication(sys.argv)
      mainWin = Window()
      mainWin.show()
      sys.exit(app.exec_())
  