title: How to change QSlider handle width using stylesheet
body: <p>I have an application that I wan't to run on a 10" touch screen.  I am trying to make the QSlider handle larger so it will be easier to move.  I have found plenty of examples of changing the handle width in the style sheet, but the changes are not being reflected when I run the code. I am using PyQt5 Designer and here is the style sheet for the slider.</p>
  
  <pre><code>QSlider::groove:horizontal {height: 10px; margin: 0 0;}
  QSlider::handle:horizontal {background-color: black; border: 1px; height: 
  40px; width: 40px; margin: 0 0;}
  </code></pre>
  
  <p>Here is the main program:</p>
  
  <pre><code>from Slidertest import Ui_MainWindow
  import sys
  from PyQt5.QtWidgets import QApplication, QMainWindow 
  
  class RPTApp(QMainWindow, Ui_MainWindow):
      def __init__(self, parent=None):
          super(RPTApp, self).__init__(parent)
          self.setupUi(self)
  
  def main():
  
      app = QApplication(sys.argv)
      window = RPTApp()
      window.show()
      app.exec_()    
  
  if __name__ == '__main__':
      main()
  </code></pre>
  
  <p>Here is the designer code for the slider:</p>
  
  <pre><code>from PyQt5 import QtCore, QtGui, QtWidgets
  
  class Ui_MainWindow(object):
      def setupUi(self, MainWindow):
          MainWindow.setObjectName("MainWindow")
          MainWindow.resize(640, 480)
          self.centralwidget = QtWidgets.QWidget(MainWindow)
          self.centralwidget.setObjectName("centralwidget")
          self.PS_timeSlider = QtWidgets.QSlider(self.centralwidget)
          self.PS_timeSlider.setGeometry(QtCore.QRect(100, 100, 371, 50))
          sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, 
  QtWidgets.QSizePolicy.Expanding)
          sizePolicy.setHorizontalStretch(0)
          sizePolicy.setVerticalStretch(0)  
          sizePolicy.setHeightForWidth(self.PS_timeSlider.sizePolicy().
       hasHeightForWidth())
       #needed to add a return and break the line above
          self.PS_timeSlider.setSizePolicy(sizePolicy)
          self.PS_timeSlider.setBaseSize(QtCore.QSize(0, 0))
          font = QtGui.QFont()
          font.setPointSize(12)
          font.setKerning(False)
          self.PS_timeSlider.setFont(font)
          self.PS_timeSlider.setFocusPolicy(QtCore.Qt.WheelFocus)
          self.PS_timeSlider.setContextMenuPolicy(QtCore.Qt.NoContextMenu)
          self.PS_timeSlider.setToolTip("")
          self.PS_timeSlider.setStatusTip("")
          self.PS_timeSlider.setWhatsThis("")
          self.PS_timeSlider.setAccessibleName("")
          self.PS_timeSlider.setAccessibleDescription("")
          self.PS_timeSlider.setStyleSheet("QSlider::groove:horizontal 
  {height: 10px; margin: 0 0;}\n"
  "QSlider::handle:horizontal {background-color: black; border: 1px; height: 
  40px; width: 40px; margin: 0 0;}\n"
  "")
          self.PS_timeSlider.setMinimum(0)
          self.PS_timeSlider.setMaximum(100)
          self.PS_timeSlider.setSingleStep(1)
          self.PS_timeSlider.setPageStep(5)
          self.PS_timeSlider.setProperty("value", 50)
          self.PS_timeSlider.setSliderPosition(50)
          self.PS_timeSlider.setTracking(True)
          self.PS_timeSlider.setOrientation(QtCore.Qt.Horizontal)
          self.PS_timeSlider.setInvertedAppearance(False)
          self.PS_timeSlider.setInvertedControls(False)
          self.PS_timeSlider.setTickPosition(QtWidgets.QSlider.TicksBothSides)
          self.PS_timeSlider.setTickInterval(1)
          self.PS_timeSlider.setObjectName("PS_timeSlider")
          MainWindow.setCentralWidget(self.centralwidget)
          self.menubar = QtWidgets.QMenuBar(MainWindow)
          self.menubar.setGeometry(QtCore.QRect(0, 0, 640, 26))
          self.menubar.setObjectName("menubar")
          MainWindow.setMenuBar(self.menubar)
          self.statusbar = QtWidgets.QStatusBar(MainWindow)
          self.statusbar.setObjectName("statusbar")
          MainWindow.setStatusBar(self.statusbar)
  
          self.retranslateUi(MainWindow)
          QtCore.QMetaObject.connectSlotsByName(MainWindow)
  
      def retranslateUi(self, MainWindow):
          _translate = QtCore.QCoreApplication.translate
          MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
  </code></pre>
  
  <p>I have tried everything I found in my searches, but have had no luck.  I would appreciate any help you can provide.</p>