add items to qTreeWidget, show current Item to qListWidget

qTreeWidget_test.py

import sys

# for PyQt 
from PyQt4 import uic, QtGui
from PyQt4.QtGui import QMainWindow, QApplication
from PyQt4.QtGui import QTableWidgetItem, QTreeWidgetItem
from PyQt4.QtGui import QFileDialog, QFont, QFileSystemModel, QListWidgetItem 
from PyQt4.QtCore import QModelIndex, QDir, SIGNAL, QObject, pyqtSlot

form_class = uic.loadUiType("./qTreeWidget_test.ui")[0]

class MyWindow(QMainWindow, form_class):
    def __init__(self):
        super(MyWindow,self).__init__()
        self.setupUi(self)
        
        ## push buttons init code
        self.pushButton_displayCurrentItem.clicked.connect(self.displayCurrentItem)
        self.pushButton_addItems.clicked.connect(self.addItems)
        
        ## treewidget
        self.treeWidget.setColumnCount(3)
       
    def displayCurrentItem(self):
        print "displayCurrentItem"
        
        # add an item
        currentStr = self.treeWidget.currentItem().text(0)
        anItem = QListWidgetItem(currentStr)
        self.listWidget.addItem(anItem)
        
    #@pyqtSlot("QItemSelection, QItemSelection")
    def addItems(self):
        print "hello!"
        aItem1 = QTreeWidgetItem(self.treeWidget, ["abc", "def"])
        aItem2 = QTreeWidgetItem(aItem1, "test")
        aItem3 = QTreeWidgetItem(aItem2, ["test"])
        self.treeWidget.insertTopLevelItem(aItem1);

if __name__ == "__main__":
    app = QApplication(sys.argv)
    #setup_logging()
    myWindow = MyWindow()
    myWindow.show()
    app.exec_()

qTreeWidget_test.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1261</width>
    <height>1040</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QHBoxLayout" name="horizontalLayout">
    <item>
     <widget class="QGroupBox" name="groupBox">
      <property name="title">
       <string>TreeWidget1</string>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout">
       <item>
        <widget class="QTreeWidget" name="treeWidget">
         <column>
          <property name="text">
           <string notr="true">1</string>
          </property>
         </column>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QGroupBox" name="groupBox_3">
      <property name="title">
       <string>ListWidget</string>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_3">
       <item>
        <widget class="QListWidget" name="listWidget"/>
       </item>
      </layout>
     </widget>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1261</width>
     <height>31</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
  <widget class="QDockWidget" name="dockWidget">
   <attribute name="dockWidgetArea">
    <number>1</number>
   </attribute>
   <widget class="QWidget" name="dockWidgetContents">
    <layout class="QVBoxLayout" name="verticalLayout_2">
     <item>
      <widget class="QPushButton" name="pushButton_addItems">
       <property name="text">
        <string>addItems</string>
       </property>
      </widget>
     </item>
     <item>
      <widget class="QPushButton" name="pushButton_displayCurrentItem">
       <property name="text">
        <string>displayCurrentItem</string>
       </property>
      </widget>
     </item>
    </layout>
   </widget>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>