Ich wollte eine Variable verwenden, die in einem untergeordneten Frame definiert ist. Ich kann nicht herausfinden, wie ich den Benutzernamen nach einem erfolgreichen Anmeldeereignis im untergeordneten Frame zurück in den Hauptrahmen ziehen kann. Ich wollte das statische Etikett aktualisieren, um den Benutzernamen anzuzeigen.

import wx
import MySQLdb
import sys
username = ""

class MainFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, title = 'Application Title',style = wx.SYSTEM_MENU)
        panel = wx.Panel(self)
        menubar = wx.MenuBar()
        panel.SetBackgroundColour((200,200,200))
        vbox = wx.BoxSizer(wx.HORIZONTAL)
        midPan = wx.Panel(panel)
        midPan.SetBackgroundColour((100,0,0))
        pan2 = wx.Panel(panel)
        pan2.SetBackgroundColour((0,100,0))
        vbox.Add(pan2, 1, wx.EXPAND | wx.ALL)
        vbox.Add(midPan, 5, wx.EXPAND | wx.ALL)
        hbox = wx.BoxSizer(wx.VERTICAL)
        hbox1=wx.BoxSizer(wx.VERTICAL)
        h1=wx.Panel(midPan)
        h1.SetBackgroundColour((200,0,100))
        h2=wx.Panel(midPan)
        h2.SetBackgroundColour((0,100,200))
#######################################################################
        text1 = wx.StaticText(h1, label="Welcome ") #insert the global variable in this label after the user has successfully logged in
        text2 = wx.StaticText(h1, label="Label2")
        hbox.Add(h1,3,wx.EXPAND|wx.ALL,20)
        hbox.Add(h2,1,wx.EXPAND|wx.ALL,20)
        hbox1.Add(text1,1,wx.ALIGN_LEFT)        
        hbox1.Add(text2,1,wx.ALIGN_RIGHT)  
        panel.SetSizer(vbox)
        midPan.SetSizer(hbox)
        h1.SetSizer(hbox1)
        self.statusbar = self.CreateStatusBar()
        self.SetMenuBar(menubar)
        self.Centre()
        self.Maximize()
        self.Show(True)
        frame = LoginFrame(self)
        frame.Show(True)
        frame.MakeModal(True)

    def OnExit(self, e):
        self.Close()

class LoginFrame(wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__(self, parent,style=wx.DEFAULT_FRAME_STYLE & ~(wx.RESIZE_BORDER | wx.MAXIMIZE_BOX | wx.CLOSE_BOX | wx.MINIMIZE_BOX ), title = "System Login")
        self.panel = wx.Panel(self)     
        self.userlabel = wx.StaticText(self.panel, label="Username:")
        self.passlabel = wx.StaticText(self.panel, label="Password:")
        self.userbox = wx.TextCtrl(self.panel, size=(140, -1))
        self.passbox = wx.TextCtrl(self.panel, size=(140, -1), style=wx.TE_PASSWORD)
        self.login = wx.Button(self.panel, label="Login")
        self.exit = wx.Button(self.panel, label="Exit")
        self.Centre()
        self.windowSizer = wx.BoxSizer()
        self.windowSizer.Add(self.panel, 1, wx.ALL | wx.EXPAND)        
        self.sizer = wx.GridBagSizer(5, 5)
        self.sizer.Add(self.userlabel, (0, 0))
        self.sizer.Add(self.userbox, (0, 1))
        self.sizer.Add(self.passlabel, (1, 0))
        self.sizer.Add(self.passbox, (1, 1))
        self.sizer.Add(self.login, (2, 0))
        self.sizer.Add(self.exit, (2, 1))
        self.border = wx.BoxSizer()
        self.border.Add(self.sizer, 1, wx.ALL | wx.EXPAND, 5)
        self.panel.SetSizerAndFit(self.border)  
        self.SetSizerAndFit(self.windowSizer)  
        self.login.Bind(wx.EVT_BUTTON, self.OnLogin)
        self.exit.Bind(wx.EVT_BUTTON, self.OnExit)

    def OnLogin(self, e):
        db = MySQLdb.connect("localhost","root","","test" )
        cursor = db.cursor()
        username = self.userbox.GetValue()
        password = self.passbox.GetValue()
        try:
            cursor.execute("SELECT * FROM useraccounts WHERE username=%s" ,username)
            data = cursor.fetchall()
            for row in data:
                dbpass = row[2]
            if dbpass == password:
                self.MakeModal(False)
                e.Skip()
                self.Close()
                wx.MessageBox('You are now logged in', 'Info', wx.OK | wx.ICON_INFORMATION)
            else:
                wx.MessageBox('Username or Password is incorrect', 'Info', wx.OK | wx.ICON_INFORMATION)
        except:
            wx.MessageBox('Username or Password is incorrect', 'Info', wx.OK | wx.ICON_INFORMATION)

    def OnExit(self,e):
        self.MakeModal(False)
        e.Skip()
        self.Close()
        sys.exit(0)

if __name__ == '__main__':
    app = wx.App()
    MainFrame()
    app.MainLoop()