pyuic5 -o conplex_window_drag.py conplex_window.ui

# coding:utf-8
# 州的先生 zmister.com Python GUI教程

from PyQt5 import QtCore,QtWidgets,QtGui
from GUI import conplex_window_drag
import sys
import time

class MainWindow(object):
  def __init__(self):
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    self.ui = conplex_window_drag.Ui_MainWindow()
    self.ui.setupUi(MainWindow)

    self.update_date()
    self.update_calendar()

    self.set_lcd()
    self.set_dial()

    self.update_progressbar()

    self.set_font()
    MainWindow.show()
    sys.exit(app.exec_())

  # 修改日期修改器数值
  def update_date(self):
    self.ui.dateEdit.setDate(self.ui.calendarWidget.selectedDate())

  # 日历信号槽
  def update_calendar(self):
    self.ui.calendarWidget.selectionChanged.connect(self.update_date)

  # 设置LCD数字
  def set_lcd(self):
    self.ui.lcdNumber.display(self.ui.dial.value())

  # 刻度盘信号槽
  def set_dial(self):
    self.ui.dial.valueChanged['int'].connect(self.set_lcd)

  # 州的先生 zmister.com
  # 按钮信号槽
  def update_progressbar(self):
    self.ui.radioButton.clicked.connect(self.start_progressbar)
    self.ui.radioButton_2.clicked.connect(self.stop_progressbar)
    self.ui.radioButton_3.clicked.connect(self.reset_progressbar)
    self.progress_value = 0
    self.stop_progress = False

  def progressbar_counter(self, start_value=0):
    self.run_thread = RunThread(parent=None, counter_start=start_value)
    self.run_thread.start()
    self.run_thread.counter_value.connect(self.set_progressbar)

  def set_progressbar(self, counter):
    if not self.stop_progress:
      self.ui.progressBar.setValue(counter)

  # 启动进度栏
  def start_progressbar(self):
    self.stop_progress = False
    self.progress_value = self.ui.progressBar.value()
    self.progressbar_counter(self.progress_value)

  # 停止进度栏
  def stop_progressbar(self):
    self.stop_progress = True
    try:
      self.run_thread.stop()
    except:
      pass
  # 重设进度栏
  def reset_progressbar(self):
    self.stop_progressbar()
    self.progress_value = 0
    self.ui.progressBar.reset()
    self.stop_progress = False

  # 字体选择
  def set_font(self):
    self.ui.fontComboBox.activated['QString'].connect(self.ui.label.setText)

class RunThread(QtCore.QThread):
  # 定义一个新的信号
  counter_value = QtCore.pyqtSignal(int)

  def __init__(self, parent=None, counter_start=0):
    super(RunThread, self).__init__(parent)
    self.counter = counter_start
    self.is_running = True

  def run(self):
    while self.counter < 100 and self.is_running == True:
      time.sleep(0.1)
      self.counter += 1
      print(self.counter)
      # 发出一个新值的信号
      self.counter_value.emit(self.counter)

  def stop(self):
    self.is_running = False
    print('线程停止中...')
    self.terminate()

if __name__ == "__main__":
  MainWindow()

class DragDropButton(QtWidgets.QPushButton):
  
  def __init__(self, text, parent):
    super().__init__(text, parent)    
    self.setAcceptDrops(True)
    
  def dragEnterEvent(self, event):
    if event.mimeData().hasFormat('text/plain'):
      event.accept()
    else:
      event.ignore()
      
  def dropEvent(self, event):
    self.setText(event.mimeData().text())

class MainWindow(object):
  def __init__(self):
    ……
    self.ui.pushButton.hide()
    self.pushButton = DragDropButton("拖放按钮",MainWindow)
    self.ui.gridLayout_5.addWidget(self.pushButton,0, 1, 1, 2)
    ……