Wxpython将数据从一帧传递到另一帧

Question

我有一个文本控件、一个选择控件和一个按钮。我想在按下按钮时将文本控件和选择控件的值传递给另一个框架。在下面代码的 on_press 方法中，我将两个值作为列表返回。如何在 PanelTwo 中访问此列表。这是代码：

import wx

class PanelOne(wx.Panel):

    def __init__(self, parent):

        wx.Panel.__init__(self, parent)

        box = wx.BoxSizer(wx.VERTICAL)

        self.label = wx.StaticText(self,label = "Your Name:" ,style = wx.ALIGN_CENTRE)

        box.Add(self.label, 1 , wx.EXPAND |wx.ALIGN_CENTER_HORIZONTAL |wx.ALL, 20)

        self.inputTxtOne = wx.TextCtrl(self,wx.ID_ANY,value='')

        box.Add(self.inputTxtOne, 1 , wx.EXPAND |wx.ALIGN_CENTER_HORIZONTAL |wx.ALL, 20)

        languages = ['ZIRA', 'DAVID']

        chlbl = wx.StaticText(self,label = "Voice control",style = wx.ALIGN_CENTRE) 

        box.Add(chlbl,1,wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL|wx.ALL,5)

        self.choice = wx.Choice(self,choices = languages)

        box.Add(self.choice,1,wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL|wx.ALL,5)

        btn = wx.Button(self, label='Submit',style=wx.TRANSPARENT_WINDOW)

        btn.SetFont(wx.Font(15,wx.FONTFAMILY_DEFAULT,wx.FONTSTYLE_NORMAL,wx.FONTWEIGHT_NORMAL))

        btn.Bind(wx.EVT_BUTTON, self.on_press)

        box.Add(btn,1,wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL|wx.ALL,5)

        self.SetSizer(box)

        btn.Bind(wx.EVT_BUTTON, self.on_press)        

    def on_press(self,event):

        name = self.inputTxtOne.GetValue()
        voice_choice = self.choice.GetValue()
        nv_list = [name,voice_choice]

        parent_frame = self.GetParent()
        parent_frame.Close()
        frame = FrameTwo()
        frame.Show()       

        return nv_list        


class PanelTwo(wx.Panel):

    def __init__(self, parent):

        wx.Panel.__init__(self, parent)

        box = wx.BoxSizer(wx.VERTICAL)

        self.label = wx.StaticText(self,label = "Your Name is "+name ,style = wx.ALIGN_CENTRE)

        box.Add(self.label, 1 , wx.EXPAND |wx.ALIGN_CENTER_HORIZONTAL |wx.ALL, 20)

        self.SetSizer(box)


class FrameOne(wx.Frame):


    def __init__(self):

        wx.Frame.__init__(self, None, title="First Frame")
        panel = PanelOne(self)
        self.Show()

class FrameTwo(wx.Frame):

    def __init__(self):

        wx.Frame.__init__(self, None, title="Second Frame")
        panel = PanelTwo(self)
        self.Show()


if __name__ == "__main__":
    app = wx.App(False)
    frame = FrameOne()
    app.MainLoop()

Answer 1

您的代码中有几个错误。一步步来吧。

首先，PanelOne中名为"name"的变量，必须是class的一部分，而不是"on_press"方法的局部变量：

变化：

name = self.inputTxtOne.GetValue()
voice_choice = self.choice.GetValue()

作者：

# Notice the use of self. In this way, we can access it from anywhere in the class
self.name = self.inputTxtOne.GetValue()
# What version of wx are you using? Get the choices value with GetSelection() method.
voice_choice = self.choice.GetSelection()

现在我们需要从另一个 class (PanelTwo) 访问这个变量。为此，我们会将 PanelOne class 的一个实例传递给第二帧 (Frame2)，并将其存储为成员变量（使用 self，正如我们在前面的示例中看到的那样）。

# When you instantiate the Frame2 in PanelOne must pass the self instance of PanelOne
frame = FrameTwo(self)

然后在Frame2中的init方法中：

def __init__(self, parent):
    wx.Frame.__init__(self, None, title="Second Frame")

    #Now the reference to PanelOne is a member varialble of class Frame2.
    self.panelOne = parent

    #Pass Frame2 instance (self) to PanelTwo in constructor:
    panel = PanelTwo(self)

    # Rest of your code...

终于在 PanelTwo 中：

class PanelTwo(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self)

        # parent is Frame2. 
        # panelOne is a public and member variable of Frame2 that references to PanelOne instance.
        # name is a member and accesible variable of PanelOne.

        print(parent.panelOne.name)

一个建议：使用WxGlade 来制作最好的代码。有了它，您可以了解很多关于 wxpython 中的事情是如何完成的。

祝你好运！

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