wxPython中帧之间的全局变量 [英] Global variable between frames in wxPython
本文介绍了wxPython中帧之间的全局变量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想使用在子框架中定义的变量.我不知道如何在子框架中成功登录事件后将用户名拉回主框架.我想更新静态标签以显示用户名.
I wanted to use a variable defined in a child frame. I can't figure out how to pull back the username after a successful login event in the child frame back to the main frame. I wanted to update the static label to show the username.
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()
推荐答案
我认为最简单、最干净的方法是使用 pubsub.pubsub 的 API 因您使用的 wxPython 版本而异.不过，我已经为两者编写了教程.所以对于 wxPython 2.8，你应该看看这个:
I think the easiest and cleanest way to accomplish this is to use pubsub. The API for pubsub is different depending on which version of wxPython you use. I have written up tutorials for both though. So for wxPython 2.8, you'd want to look at this one:
对于 wxPython 2.9+，你想看看这个:
For wxPython 2.9+, you'd want to take a look at this one:
有一个技巧可以让 wxPython 2.8 以新的方式运行，我在第二篇文章中解释了这一点.
There is a trick to make wxPython 2.8 behave in the new manner, which I explain in the second article.
无论如何，介绍已经足够了，让我们在您的代码中实际尝试 2.9 方法:
Anyway, enough with the intro, let's actually try the 2.9 method in your code:
import wx
import sys
username = ""
from wx.lib.pubsub import pub
class MainFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, title = 'Application Title',style = wx.SYSTEM_MENU)
pub.subscribe(self.myListener, "update_frame")
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))
#######################################################################
self.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(self.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 myListener(self, msg):
""""""
self.text1.SetLabel("Welcome %s" % msg)
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.onClose)
self.Bind(wx.EVT_CLOSE, self.onClose)
def OnLogin(self, e):
#db = MySQLdb.connect("localhost","root","","test" )
#cursor = db.cursor()
username = self.userbox.GetValue()
password = self.passbox.GetValue()
#self.MakeModal(False)
self.Close()
#try:
#cursor.execute("SELECT * FROM useraccounts WHERE username=%s" ,username)
#data = cursor.fetchall()
#for row in data:
#dbpass = row[2]
#if dbpass == password:
#
#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 onClose(self,e):
username = self.userbox.GetValue()
pub.sendMessage("update_frame", msg=username)
self.Destroy()
if __name__ == '__main__':
app = wx.App()
MainFrame()
app.MainLoop()
此代码在带有 wxPython 2.9 和 Python 2.7 的 Windows 7 上对我有用.请注意，我注释掉了 SQL 内容，使其运行起来更简单一些.我还稍微更改了事件绑定，因为 OnExit 没有为我触发.
This code worked for me on Windows 7 with wxPython 2.9 and Python 2.7. Note that I commented out the SQL stuff to make it a little simpler to run. I also changed the event bindings slightly as OnExit wasn't firing for me.
这篇关于wxPython中帧之间的全局变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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