Combo box that you must learn every day in PyQt5

This article mainly introduces the combo box that you must learn every day in PyQt5. It has a certain reference value. Interested friends can refer to it.

QComboBox is a tool that allows users to select from a list of options. A control that selects an item.

#!/usr/bin/python3
# -*- coding: utf-8 -*-

"""
PyQt5 教程

这个例子展示了如何使用QComboBox部件。

作者：我的世界你曾经来过
博客：http://blog.csdn.net/weiaitaowang
最后编辑：2016年8月4日
"""

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QComboBox

class Example(QWidget):

 def __init__(self):
  super().__init__()

  self.initUI()

 def initUI(self):

  self.lb1 = QLabel('黑客帝国', self)

  combo = QComboBox(self)
  combo.addItem('黑客帝国')
  combo.addItem('指环王')
  combo.addItem('复仇车联盟')
  combo.addItem('阿凡达')
  combo.addItem('X战警')

  combo.move(50, 50)
  self.lb1.move(50, 150)

  combo.activated[str].connect(self.onActivated)

  self.setGeometry(300, 300, 300, 200)
  self.setWindowTitle('组合框')
  self.show()

 def onActivated(self, text):
  self.lb1.setText(text)
  self.lb1.adjustSize()

if __name__ == '__main__':

 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_())

There are five options in the combo box. The label control is used to display the selected option from the combo box.

combo = QComboBox(self)
combo.addItem('黑客帝国')
combo.addItem('指环王')
combo.addItem('复仇车联盟')
combo.addItem('阿凡达')
combo.addItem('X战警')

We create a QComboBox widget containing five options.

combo.activated[str].connect(self.onActivated)

When the item is selected in QComboBox, we call the onActivated() method.

def onActivated(self, text):
 self.lb1.setText(text)
 self.lb1.adjustSize()

In the onActivated() method, we set the label control to display the text of the selected item. adjustSize() adjusts the size of the label.

After the program is executed

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