[PyQt5] QListWidget demo

# !-*- coding:utf-8 -*-
import os
import sys

from PyQt5 import uic
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QDialog, QApplication, QListWidgetItem

# ui 파일명과 소스 파일명 동일하게 저장(_name, _ext) = os.path.splitext(os.path.basename(__file__))
_ui_path = os.path.join('./', _name + '.ui')

FORM_CLASS, _ = uic.loadUiType(_ui_path)


class DemoListWidget(QDialog, FORM_CLASS):
   """   https://doc.qt.io/qt-5/qlistwidget.html   https://doc.qt.io/qt-5/qlistwidgetitem.html   """   def __init__(self):
      super().__init__()
      self.setupUi(self)
      # ListWidget 에 데이터 추가.      self._init_data()

      self.listWidget.currentItemChanged.connect(self.cb_currentItemChanged)
      self.listWidget.currentRowChanged.connect(self.cb_currentRowChanged)
      self.listWidget.currentTextChanged.connect(self.cb_currentTextChanged)
      self.listWidget.itemActivated.connect(self.cb_itemActivated)
      self.listWidget.itemChanged.connect(self.cb_itemChanged)
      self.listWidget.itemClicked.connect(self.cb_itemClicked)

   def _init_data(self):
      _item = QListWidgetItem()
      _item.setData(Qt.DisplayRole, 'hello')
      _item.setData(Qt.UserRole, 'world')
      # checkbox 플래그 설정.      _item.setFlags(_item.flags() | Qt.ItemIsUserCheckable)
      # checkbox 초기값 설정 Qt.Unchecked : 0, Qt.PartiallyChecked : 1, Qt.Checked : 2      _item.setCheckState(Qt.Unchecked)
      # 위젯에 아이템 추가.      self.listWidget.addItem(_item)

   def cb_currentItemChanged(self, _current, _previous):
      print('cb_currentItemChanged')

   def cb_currentRowChanged(self, _currentRow):
      print('cb_currentRowChanged')

   def cb_currentTextChanged(self, _currentText):
      print('cb_currentTextChanged')

   def cb_itemActivated(self, _item):
      print('cb_itemActivated')

   def cb_itemChanged(self, _item):
      """      체크박스를 체크, 해제 했을 때 호출됨.      :param _item:      :return:      """      # hello 출력      print(_item.text())
      # hello 출력      print(_item.data(Qt.DisplayRole))
      # world 출력      print(_item.data(Qt.UserRole))
      # 체크 해제 : 0, 체크 : 1      print(_item.checkState())
      # 아이템의 row num      _row = self.listWidget.row(_item)
      print(_row)
      # 아이템 수      print(self.listWidget.count())
      # 아이템 제거.      _taken_item = self.listWidget.takeItem(_row)
      # 아이템 수      print(self.listWidget.count())

   def cb_itemClicked(self, _item):
      print('cb_itemClicked')


def main():
   app = QApplication(sys.argv)
   dialog = DemoListWidget()
   dialog.show()
   app.exec_()


if __name__ == '__main__':
   main()