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02-QPushButton-菜单.py
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02-QPushButton-菜单.py
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import sys
from PyQt5.Qt import *
# 1. 创建一个应用程序对象
app = QApplication(sys.argv)
# 2.控件的操作
# 2.1创建控件
window = QWidget()
# 2.2设置控件
window.setWindowTitle("QPushbutton-菜单")
window.resize(500, 500)
window.move(400, 250)
btn = QPushButton("按钮", window)
menu = QMenu()
# 子菜单 最近打开
# 行为动作:新建、打开 [分割线] 退出
new_action = QAction(QIcon("../Icons/plus_48px.ico"), "新建", menu) # 可以同时设置 图标、文字、父对象
# new_action.setText("新建")
# new_action.setIcon(QIcon('../Icons/plus_48px.ico'))
new_action.triggered.connect(lambda: print("新建文件")) # new_action 的触发信号连接到槽函数
open_action = QAction(QIcon("../Icons/search_48px.ico"), "打开", menu)
open_action.triggered.connect(lambda: print("打开文件"))
exit_action = QAction(QIcon("../Icons/cross_48px.ico"), "关闭", menu)
exit_action.triggered.connect(lambda: exit())
open_recent_menu = QMenu()
open_recent_menu.setTitle("最近打开")
# open_recent_menu.setIcon()
file_action = QAction("Python-GUI编程-PyQt5")
open_recent_menu.addAction(file_action)
menu.addAction(new_action)
menu.addAction(open_action)
menu.addMenu(open_recent_menu) # 把一个QMenu放在另一个QMenu上,即成为子菜单
menu.addSeparator() # 添加分割线
menu.addAction(exit_action)
btn.setMenu(menu)
# 2.3展示控件
window.show()
btn.showMenu() # 展示菜单
# 3.应用程序的执行, 进入到消息循环
sys.exit(app.exec_())