Question

以下是两个例外中的一个。

在wx.PostEvent(self, MyEvent())方法中调用MyPanel.OnButton会抛出：

TypeError: __init__() takes exactly 2 arguments (1 given)如果我将代码称为粘贴，没有任何参数。
TypeError: in method 'new_PyCommandEvent', expected argument 2 of type 'int'如果我将任何非整数值传递给MyEvent（）构造函数。

我发现一个破旧的论坛帖子建议我需要传入任何可能启动事件的对象的对象ID。我可以通过以下方式做到：

wx.PostEvent(self, MyEvent(e.EventObject.GetId()))

- 这很有效。但是，

我在网上找到的其他每个例子都没有为新实例化的事件提供任何参数，所以我认为我忽视了一些事情。
我不确定我从GetId（）获得的整数是否正确...似乎id可能是可选的？

-

import wx
import wx.lib.newevent

# Custom Events

MyEvent, EVT_MYEVENT = wx.lib.newevent.NewCommandEvent()

class MyPanel(wx.Panel):
    def __init__(self, parent):
        super(MyPanel, self).__init__(parent)
        sizer = wx.BoxSizer()
        self.button1 = wx.Button(self, label="Button 1")
        sizer.Add(self.button1)
        self.Bind(wx.EVT_BUTTON, self.OnButton)

    def OnButton(self, e):
        e.Skip()
        ##
        # only works if I throw in an Int in the constructor but most 
        # of the tutorials don't do this.
        wx.PostEvent(self, MyEvent()) 


class MyFrame(wx.Frame):
    def __init__(self, parent, title=""):
        super(MyFrame, self).__init__(parent, title=title)
        self.panel = MyPanel(self)  

class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None, title="Event Propagation")
        self.frame.Show()
        self.Bind(EVT_MYEVENT, self.OnMyEvt)
        return True

    def OnMyEvt(self, e):
        print("MY EVENT HAS HAPPENED!")
        e.Skip()    

if __name__ == "__main__":
    app = MyApp()
    app.MainLoop()

Answer 1

我怀疑你不需要Command Event并且正常事件会发生变化：

MyEvent, EVT_MYEVENT = wx.lib.newevent.NewCommandEvent()

为：

MyEvent, EVT_MYEVENT = wx.lib.newevent.NewEvent()

它应该按照您的意愿工作。

如果确实需要command event，则需要提供id
快速嘲笑你的代码（它可能需要进一步的工作）：

import wx
import wx.lib.newevent

# Custom Events

MyEvent, EVT_MYEVENT = wx.lib.newevent.NewCommandEvent()
CMD_ID = wx.NewId()
class MyPanel(wx.Panel):
    def __init__(self, parent):
        super(MyPanel, self).__init__(parent)
        sizer = wx.BoxSizer()
        self.button1 = wx.Button(self, CMD_ID, label="Button 1")
        sizer.Add(self.button1)
        self.Bind(wx.EVT_BUTTON, self.OnButton,id=CMD_ID)

    def OnButton(self, e):
        e.Skip()
        ##
        # only works if I throw in an Int in the constructor but most 
        # of the tutorials don't do this.
        id = e.GetId()
        wx.PostEvent(self, MyEvent(id,myid=id)) 


class MyFrame(wx.Frame):
    def __init__(self, parent, title=""):
        super(MyFrame, self).__init__(parent, title=title)
        self.panel = MyPanel(self)  

class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None, title="Event Propagation")
        self.frame.Show()
        self.Bind(EVT_MYEVENT, self.OnMyEvt)
        return True

    def OnMyEvt(self, e):
        print("MY EVENT HAS HAPPENED!")
        e.Skip()    

if __name__ == "__main__":
    app = MyApp()
    app.MainLoop()

自定义NewCommandEvent抛出异常

1 个答案: