问题描述
我正在尝试使用 PyPubSub 在两个 wxpython 窗口之间传递数据。下面我将代码缩减为基础知识。当我在主窗口的 textcntrl 中填写数据并点击按钮将其传递到第二个窗口（CoordFrame）时我得到了什么我收到以下错误-
TypeError: sendMessage() 需要 2 个位置参数，但给出了 3 个
我能找到的每个例子都显示在 pub.sendMessage 中传递两个参数；这就是我认为我正在做的事情。传递的第三个参数是什么，它从哪里形成以及如何停止它？我尝试了各种参数组合和数据类型，包括二进制。
'''
from pubsub import pub
import wx
class MainFrame (wx.Frame):
def __init__(self,parent,title):
super(MainFrame,self).__init__(parent,title = title,size = (200,200))
self.panel = MainPanel(self)
class CoordFrame (wx.Frame):
def __init__(self,title):
super(CoordFrame,200))
self.panel = CoordPanel(self)
class MainPanel(wx.Panel):
def __init__(self,parent):
super(MainPanel,self).__init__(parent)
vsizer = wx.BoxSizer(wx.VERTICAL)
self.tbxNewMap = wx.TextCtrl(self,id=1001,pos=(20,20),size = (50,style = wx.TE_CENTER|wx.TE_NOHIDESEL|wx.TE_PROCESS_ENTER)
vsizer.Add(self.tbxNewMap)
self.btnEnterNewMap = wx.Button(self,id=1002,label = "New Data",pos = (20,80),size = (80,40))
vsizer.Add(self.btnEnterNewMap,wx.EXPAND)
self.Bind(wx.EVT_BUTTON,self.onButtonNewMap,id=1002)
def onButtonNewMap(self,event):
temp = self.tbxNewMap.GetValue()
pub.sendMessage("coord_listener",temp)
coordframe = CoordFrame(None,"Entry")
coordframe.Show()
class CoordPanel(wx.Panel):
def __init__(self,parent):
super(CoordPanel,self).__init__(parent)
vsizer = wx.BoxSizer(wx.VERTICAL)
pub.subscribe(self.coord_listener,"coord_listener")
self.tbxNewMapNumber = wx.TextCtrl(self,id=1000,style = wx.TE_CENTER|wx.TE_NOHIDESEL|wx.TE_PROCESS_ENTER)
vsizer.Add(self.tbxNewMapNumber)
def coord_listener(self,message):
newmapnum = message
self.tbxNewMapNumber.SetValue(newmapnum)
self.tbxNewMapNumber.Refresh()
class GMDash(wx.App):
def OnInit(self):
self.mainframe = MainFrame(parent = None,title = "Dashboard")
self.mainframe.Show()
return True
app = GMDash()
app.MainLoop()
'''
解决方法
在对 sendmessage 的调用中使用命名参数，您需要注册发送消息的侦听器 before，而不是像您目前所做的那样。
见下文：
from pubsub import pub
import wx
class MainFrame (wx.Frame):
def __init__(self,parent,title):
super(MainFrame,self).__init__(parent,title = title,size = (200,200))
self.panel = MainPanel(self)
class CoordFrame (wx.Frame):
def __init__(self,title):
super(CoordFrame,200))
self.panel = CoordPanel(self)
class MainPanel(wx.Panel):
def __init__(self,parent):
super(MainPanel,self).__init__(parent)
vsizer = wx.BoxSizer(wx.VERTICAL)
self.tbxNewMap = wx.TextCtrl(self,id=1001,pos=(20,20),size = (50,style = wx.TE_CENTER|wx.TE_NOHIDESEL|wx.TE_PROCESS_ENTER)
vsizer.Add(self.tbxNewMap)
self.btnEnterNewMap = wx.Button(self,id=1002,label = "New Data",pos = (20,80),size = (80,40))
vsizer.Add(self.btnEnterNewMap,wx.EXPAND)
self.Bind(wx.EVT_BUTTON,self.onButtonNewMap,id=1002)
#Register the subscrption *before* sending the message
self.coordframe = CoordFrame(None,"Entry")
def onButtonNewMap(self,event):
temp = self.tbxNewMap.GetValue()
pub.sendMessage("coord_listener",message=temp)
#coordframe = CoordFrame(None,"Entry")
self.coordframe.Show()
class CoordPanel(wx.Panel):
def __init__(self,parent):
super(CoordPanel,self).__init__(parent)
vsizer = wx.BoxSizer(wx.VERTICAL)
pub.subscribe(self.coord_listener,"coord_listener")
self.tbxNewMapNumber = wx.TextCtrl(self,id=1000,style = wx.TE_CENTER|wx.TE_NOHIDESEL|wx.TE_PROCESS_ENTER)
vsizer.Add(self.tbxNewMapNumber)
def coord_listener(self,message):
print(message)
newmapnum = message
self.tbxNewMapNumber.SetValue(newmapnum)
self.tbxNewMapNumber.Refresh()
class GMDash(wx.App):
def OnInit(self):
self.mainframe = MainFrame(parent = None,title = "Dashboard")
self.mainframe.Show()
return True
app = GMDash()
app.MainLoop()
