PyQt4在登录后立即启动系统托盘图标

Question

我试图在成功登录后启动系统托盘菜单。我有2个qui屏幕，其余的只是python代码。登录对话框首先出现，我想在登录后隐藏这个并显示系统托盘菜单。下面是我到目前为止的代码:

注意:UI_Login是来自QtDesigner的对话框

1。系统托盘ui

from PyQt4 import QtGui
class SystemTrayIcon(QtGui.QSystemTrayIcon):
    def __init__(self, icon, parent=None):
        QtGui.QSystemTrayIcon.__init__(self, parent)
        menu = QtGui.QMenu(parent)        
        self.exitAction = menu.addAction("Exit")
        self.helpAction = menu.addAction("Help")
        self.setIcon(icon)
        self.setContextMenu(menu)

2。登录功能。调用SystemTrayIcon

import sys
from PyQt4 import QtGui, QtCore
from modules.ui.login_ui import Ui_Login
from modules.ui.menu_ui import SystemTrayIcon
from api.auth import doLogin
class Login(QtGui.QDialog):
    """
    Login user via the api
    Links the gui and the app functionality
    Logged user token is saved for further processing
    """
    def __init__(self, parent = None):
        QtGui.QDialog.__init__(self, parent)
        self.ui = Ui_Login()
        self.ui.setupUi(self)
        self.ui.pushButton.clicked.connect(self.doLogin)
    def doLogin(self):
        self.password = unicode(self.ui.password.text())
        self.email = unicode(self.ui.email.text())      
        request_data = {"username": ""+self.email+"", "password": ""+self.password+""}
        response = doLogin(request_data)
        if response.status_code == 200:
            """ 
                1. Save Api token for future entries
                2. Start app. i.e create a system tray app.
            """
            self.token = response.json()['token'];
            self.hide()
            trayIcon = SystemTrayIcon(QtGui.QIcon("Bomb.xpm"))
            trayIcon.show()
            print "End check"
        else:
            #Raise error
            print response.json()

3。主文件

import sys
from PyQt4 import QtGui, QtCore
from modules.login import Login
def main():
    app = QtGui.QApplication(sys.argv)
    login = Login()
    login.show()
    sys.exit(app.exec_())

if __name__ == "__main__":
    main()   

-登录对话框关闭时系统托盘图标不显示

Answer 1

trayIcon对象是一个局部变量，一旦doLogin()方法完成，它立即被垃圾收集。将其存储为实例属性(如self.trayIcon)将停止，你的图标应该保持存在。

Answer 2

QSystemTrayIcon有一个activated信号，您可以发射。将此信号连接到将创建QMenu的方法。

class SystemTrayIcon(QtGui.QSystemTrayIcon):
    def __init__(self, icon, parent=None):
        ...
        self.setContextMenu(menu)
        self.activated.connect(lambda reason: self._create_menu)
    def _create_menu(self):
        menu = QtWidgets.QMenu()
        menu.addAction(QtWidgets.QAction('Quit,None))
        self.setContextMenu(menu)

接下来，您需要发出activated信号，以便您的菜单将显示。我有一个类似的用例，这里有答案。