菜单多选不关闭

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Irony 2018-10-24 18:02:09 +08:00
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# 菜单设置多选并且不关闭
### [Python3.4.4 or Python3.5][PyQt5]
有时候会遇到这种需求:在界面某个位置弹出一个菜单,其中里面的菜单项可以多选(类似配置选项),
此时用QMenu会遇到点击一个菜单项就会自动关闭当然可以通过其他方式实现该功能
不过这里就采用QMenu通过特殊的方式来实现该需求。
要实现的效果:<br/>
菜单1<br/>
菜单2<br/>
菜单3<br/>
菜单4<br/>
点击菜单1、2、3可以多选不关闭菜单<br/>
点击菜单4可以勾选并且关闭菜单
知识点:<br/>
1、设置菜单项可勾选通过QAction.setCheckable(True)方法实现<br/>
2、设置菜单不可关闭通过覆盖QMenu的鼠标释放mouseReleaseEvent方法可直接替换或者通过installEventFilter安装事件过滤器实现
# 截图
![截图1](ScreenShot/1.gif)

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2018年10月24日
@author: Irony
@site: https://github.com/892768447
@email: 892768447@qq.com
@file: 菜单多选不关闭
@description:
"""
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QLabel, QPushButton, QMenu,\
QAction
__Author__ = """By: Irony
QQ: 892768447
Email: 892768447@qq.com"""
__Copyright__ = "Copyright (c) 2018 Irony"
__Version__ = "Version 1.0"
class Window(QWidget):
def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
layout = QVBoxLayout(self)
self.labelInfo = QLabel(self)
self.button = QPushButton('带按钮的菜单', self)
layout.addWidget(self.labelInfo)
layout.addWidget(self.button)
# 添加菜单
self._initMenu()
def _initMenu(self):
# 创建菜单
self._menu = QMenu(self.button)
# 替换menu的鼠标释放事件达到选择性不关闭菜单
self._menu.mouseReleaseEvent = self._menu_mouseReleaseEvent
self._menu.addAction('菜单1', self._checkAction)
self._menu.addAction('菜单2', self._checkAction)
self._menu.addAction(
QAction('菜单3', self._menu, triggered=self._checkAction))
action = QAction('菜单4', self._menu, triggered=self._checkAction)
# 添加自定义的属性,判断该属性可以关闭菜单
action.setProperty('canHide', True)
self._menu.addAction(action)
for action in self._menu.actions():
# 循环设置可勾选
action.setCheckable(True)
self.button.setMenu(self._menu)
def _menu_mouseReleaseEvent(self, event):
action = self._menu.actionAt(event.pos())
if not action:
# 没有找到action就交给QMenu自己处理
return QMenu.mouseReleaseEvent(self._menu, event)
if action.property('canHide'): # 如果有该属性则给菜单自己处理
return QMenu.mouseReleaseEvent(self._menu, event)
# 找到了QAction则只触发Action
action.activate(action.Trigger)
def _checkAction(self):
# 三个action都响应该函数
self.labelInfo.setText('\n'.join(['{}\t选中:{}'.format(
action.text(), action.isChecked()) for action in self._menu.actions()]))
if __name__ == '__main__':
import sys
import cgitb
sys.excepthook = cgitb.enable(1, None, 5, 'text')
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
w = Window()
w.resize(400, 400)
w.show()
sys.exit(app.exec_())