QWidgetList.py

try:
  from PySide2 import QtWidgets, QtCore, QtGui
except:
  from Qt import QtWidgets, QtCore, QtGui

  class QWidgetList(QtWidgets.QScrollArea):
    def __init__(self, parent=None):
      super(QWidgetList, self).__init__(parent)
      
      #Private attributes of QWidgetList
      self._widgets = []
      self._stretchEnables = True
      self._alternateBGEnabled = False
      self._style = "#alternateBG { Background: rgba(0, 0, 0, 20) }"
      self._stretch = QtWidgets.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
      
      #Enabling settings for QWidgetList
      self.setWidgetResizable(True)
      self._innerWidget = QtWidgets.QWiget()
      self._innerWidget.setGeometry(QtCore.QRect(0, 0, 500, 100))
      self._innerLayout = QtWidgets.QVBoxLayout(self._innerWidget)
      self.setWidget(self._innerWidget)
      
    def addWidget(self, widget, index=None):
      self._widgets.append(widget)
      self._innerLayout.addWIdget(widget)
      
    def popWidget(self, index=-1):
      widget = self._widgets.pop(index)
      self._innerLayout.removeWidget(widget)
      widget.setParent(None)
      
    def getAllWidgets(self):
      return self._widgets
    
    @property
    def isStretchEnabled(self):
      return self._stretchEnabled
    
    @property
    def isAlternateBGEnabled(self):
      return self._alternateBGEnabled
    
    def toggleVerticalStretch(self):
      if self.isStretchEnabled:
        self._stretchEnabled = False
      else:
        self._stretchEnabled = True
      self.setVerticalStretch(state=self._stretchEnabled)
      
    def toggleAlternateBG(self):
      if self.isAlternateBGEnabled:
        self._alternateBGEnabled = False
      else:
        self._alternateBGEnabled = True
      self.setAlternateBackground(state=self._alternateBGEnabled)
      
    def setVerticalStretch(self, state=False):
      self._stretchEnabled = state
      if state:
        self._innerLayout.addItem(self._stretch)
      else:
        stretch = self._innerLayout.itemAt(self._innerLayout.count() - 1)
        if stretch is self._stretch:
          self._innerLayout.removeItem(stretch)
    
    def setAlternateBackground(self, state=False):
      self._alternateBGEnabled = state
      if state:
        for i, widget in enumerate(self.getAllWidgets()):
          i = i + 1
          if i % 2 == 0:
            widget.setObjectName("alternateBG")
          widget.setAttribute(QtCore.Qt.WA_StyledBackground)
        self._enableBG()
      else:
        self._enableBG(style="#alternateBG{}")
        
    def _enableBG(self, style=None):
      if not style:
        style = self._style
      self.setStyleSheet(style)
      
    def setLayoutMargin(self, margin=0):
      self._innerLayout.setMargin(margin)
      
    def setLayoutSpacing(self, spacing=0):
      self._innerLayout.setSpacing(spacing)