从 wxpython 主框架返回值

Question

我面临一些从 wxpython 主框架获取返回值的问题。

我的脚本：

import wx

import wx.xrc

class Email_template( wx.Frame ):

    def __init__( self, parent, to, cc, subject, message_boby ):
        app = wx.App(False)
        wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 650,500 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )
        self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )
        self.SetBackgroundColour( wx.SystemSettings.GetColour( wx.SYS_COLOUR_INFOBK ) )

        main_sizer = wx.FlexGridSizer( 0, 1, 0, 0 )
        main_sizer.SetFlexibleDirection( wx.BOTH )
        main_sizer.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        header_sizer = wx.FlexGridSizer( 0, 2, 0, 0 )
        header_sizer.SetFlexibleDirection( wx.BOTH )
        header_sizer.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        header_sizer_right = wx.FlexGridSizer( 0, 1, 0, 0 )
        header_sizer_right.SetFlexibleDirection( wx.BOTH )
        header_sizer_right.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        self.mail_send_button = wx.Button( self, wx.ID_ANY, u"Send", wx.DefaultPosition, wx.Size( -1,50 ), 0 )
        header_sizer_right.Add( self.mail_send_button, 0, wx.ALL, 5 )

        self.mail_edit_button = wx.Button( self, wx.ID_ANY, u"Edit", wx.DefaultPosition, wx.Size( -1,50 ), 0 )
        header_sizer_right.Add( self.mail_edit_button, 0, wx.ALL, 5 )

        header_sizer.Add( header_sizer_right, 1, wx.EXPAND, 5 )

        header_sizer_left = wx.FlexGridSizer( 0, 2, 0, 0 )
        header_sizer_left.SetFlexibleDirection( wx.BOTH )
        header_sizer_left.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        self.from_staticText = wx.StaticText( self, wx.ID_ANY, u"From:", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.from_staticText.Wrap( -1 )
        header_sizer_left.Add( self.from_staticText, 0, wx.ALL, 5 )

        self.from_textCtrl = wx.TextCtrl( self, wx.ID_ANY, "from_mail@mymail.com", wx.DefaultPosition, wx.Size( 400,-1 ), 0 )
        header_sizer_left.Add( self.from_textCtrl, 0, wx.ALL, 5 )

        self.to_staticText = wx.StaticText( self, wx.ID_ANY, u"To:", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.to_staticText.Wrap( -1 )
        header_sizer_left.Add( self.to_staticText, 0, wx.ALL, 5 )

        self.to_textCtrl = wx.TextCtrl( self, wx.ID_ANY, to, wx.DefaultPosition, wx.Size( 400,-1 ), 0 )
        header_sizer_left.Add( self.to_textCtrl, 0, wx.ALL, 5 )

        self.cc_staticText = wx.StaticText( self, wx.ID_ANY, u"CC:", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.cc_staticText.Wrap( -1 )
        header_sizer_left.Add( self.cc_staticText, 0, wx.ALL, 5 )

        self.cc_textCtrl = wx.TextCtrl( self, wx.ID_ANY, cc, wx.DefaultPosition, wx.Size( 400,-1 ), 0 )
        header_sizer_left.Add( self.cc_textCtrl, 0, wx.ALL, 5 )

        self.subject_staticText = wx.StaticText( self, wx.ID_ANY, u"Subject:", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.subject_staticText.Wrap( -1 )
        header_sizer_left.Add( self.subject_staticText, 0, wx.ALL, 5 )

        self.subject_textCtrl = wx.TextCtrl( self, wx.ID_ANY, subject, wx.DefaultPosition, wx.Size( 400,-1 ), 0 )
        header_sizer_left.Add( self.subject_textCtrl, 0, wx.ALL, 5 )

        header_sizer.Add( header_sizer_left, 1, wx.EXPAND, 5 )

        main_sizer.Add( header_sizer, 1, wx.EXPAND, 5 )

        mail_sizer = wx.FlexGridSizer( 0, 1, 0, 0 )
        mail_sizer.SetFlexibleDirection( wx.BOTH )
        mail_sizer.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        self.mail_textCtrl = wx.TextCtrl( self, wx.ID_ANY, message_boby, style=wx.TE_MULTILINE, size=( 600,330 ))
        mail_sizer.Add( self.mail_textCtrl, 0, wx.ALL, 5 )
        main_sizer.Add( mail_sizer, 1, wx.EXPAND, 5 )
        self.to_textCtrl.Enable(False)
        self.cc_textCtrl.Enable(False)
        self.subject_textCtrl.Enable(False)
        self.mail_textCtrl.Enable(False)
        self.message_boby = message_boby
        self.SetSizer( main_sizer )
        self.Layout()
        wx.EVT_BUTTON(self, self.mail_send_button.GetId(), self.OnClick_send)
        wx.EVT_BUTTON(self, self.mail_edit_button.GetId(), self.OnClick_edit)
        self.Centre( wx.BOTH )
        self.Show(True)
        app.MainLoop()

    def OnClick_send(self, event):
        self.to = self.to_textCtrl.GetValue()
        self.cc = self.cc_textCtrl.GetValue()
        self.subject = self.subject_textCtrl.GetValue()
        self.message_boby = self.mail_textCtrl.GetValue()
        r_value = self.message_boby
        self.Destroy()
        return r_value

    def OnClick_edit(self, event):
        self.to_textCtrl.Enable(True)
        self.cc_textCtrl.Enable(True)
        self.subject_textCtrl.Enable(True)
        self.mail_textCtrl.Enable(True)

return_values = Email_template(None, "tomail@mymail.com", "cc_copy@mymail.com", "message subject", "mail")
print return_values

它显示以下错误消息：

wxPython wrapper for DELETED Email_template object! (The C++ object no longer exists.)

但我需要从 gui 打印 message_body 更新的内容。

谢谢。

Answer 1

首先，我改变了你的尺码。我已将它们替换为一个非常强大的GridBagSizer。我还删除了大多数小部件大小参数，因为 sizer 现在将根据窗口大小处理小部件大小。我还从您的 wx 调用中删除了很多参数，因为这些是默认参数。通过删除默认的可选参数，代码更具可读性。在wxPython 中，您通常不需要wx.ID_ANY、wx.DefaultSize、wx.DefaultPosition 或wx.EmptyString 等，就像在wxWidgets 中那样。

其次，您编写应用程序的方式很奇怪。我想你想要两者中的任何一个：

1) 创建一个 GUI 应用程序，它有一个窗口，允许您编辑，在您按下 Send 时执行一些操作。当您按 Send 在您的情况下，它也会自行关闭，所以也许这不是您想要的......

import wx

class EmailTemplate(wx.Frame):
    def __init__(self, to, cc, subject, message_body):
        wx.Frame.__init__(self, None, size=(650, 500))

        self.panel = wx.Panel(self)       
        self.panel.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_INFOBK))

        self.sizer = wx.GridBagSizer(5, 5)

        self.sizer.AddGrowableCol(3)
        self.sizer.AddGrowableRow(5)

        # Add spacers. Not the best, but avoids another sizer for border
        self.sizer.Add((0, 0), pos=(0, 4))
        self.sizer.Add((0, 0), pos=(6, 0))

        self.mail_send_button = wx.Button(self.panel, label="Send")
        self.mail_send_button.Bind(wx.EVT_BUTTON, self.OnClick_send)
        self.sizer.Add(self.mail_send_button, pos=(1, 1), span=(2, 1), flag=wx.EXPAND)

        self.mail_edit_button = wx.Button(self.panel, label="Edit")
        self.mail_edit_button.Bind(wx.EVT_BUTTON, self.OnClick_edit)
        self.sizer.Add(self.mail_edit_button, pos=(3, 1), span=(2, 1), flag=wx.EXPAND)

        self.from_staticText = wx.StaticText(self.panel, label="From:")
        self.sizer.Add(self.from_staticText, pos=(1, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.from_textCtrl = wx.TextCtrl(self.panel, value="from_mail@mymail.com")
        self.sizer.Add(self.from_textCtrl, pos=(1, 3), flag=wx.EXPAND)

        self.to_staticText = wx.StaticText(self.panel, label="To:")
        self.sizer.Add(self.to_staticText, pos=(2, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.to_textCtrl = wx.TextCtrl(self.panel, value=to)
        self.sizer.Add(self.to_textCtrl, pos=(2, 3), flag=wx.EXPAND)

        self.cc_staticText = wx.StaticText(self.panel, label="CC:")
        self.sizer.Add(self.cc_staticText, pos=(3, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.cc_textCtrl = wx.TextCtrl(self.panel, value=cc)
        self.sizer.Add(self.cc_textCtrl, pos=(3, 3), flag=wx.EXPAND)

        self.subject_staticText = wx.StaticText(self.panel, label="Subject:")
        self.sizer.Add(self.subject_staticText, pos=(4, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.subject_textCtrl = wx.TextCtrl(self.panel, value=subject)
        self.sizer.Add(self.subject_textCtrl, pos=(4, 3), flag=wx.EXPAND)

        self.mail_textCtrl = wx.TextCtrl(self.panel, value=message_body, style=wx.TE_MULTILINE)
        self.sizer.Add(self.mail_textCtrl, pos=(5, 1), span=(1, 3), flag=wx.EXPAND)

        self.panel.SetSizerAndFit(self.sizer)

        self.to_textCtrl.Disable()
        self.cc_textCtrl.Disable()
        self.subject_textCtrl.Disable()
        self.mail_textCtrl.Disable()

        self.Show()

    def OnClick_send(self, event):
        self.DoSomethingWithEmail(self.to_textCtrl.GetValue(),
                                  self.cc_textCtrl.GetValue(),
                                  self.subject_textCtrl.GetValue(),
                                  self.mail_textCtrl.GetValue())
        self.Close()

    def OnClick_edit(self, event):
        self.to_textCtrl.Enable(True)
        self.cc_textCtrl.Enable(True)
        self.subject_textCtrl.Enable(True)
        self.mail_textCtrl.Enable(True)

    def DoSomethingWithEmail(self, to, cc, subject, text):
        # Maybe send here?
        print to, cc, subject, text

app = wx.App(False)
window = EmailTemplate("tomail@mymail.com", "cc_copy@mymail.com", "message subject", "mail")
app.MainLoop()

2) 只创建一个 Dialog，显示对话框，让用户关闭它（使用 Send），然后在没有真正的 GUI 应用程序的情况下使用 Python 脚本.

import wx

class EmailTemplate(wx.Dialog):
    def __init__(self, to, cc, subject, message_body):
        wx.Dialog.__init__(self, None, size=(650, 500))

        self.panel = wx.Panel(self)       
        self.panel.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_INFOBK))

        self.main_sizer = wx.BoxSizer()

        self.sizer = wx.GridBagSizer(5, 5)

        self.sizer.AddGrowableCol(3)
        self.sizer.AddGrowableRow(5)

        # Add spacers. Not the best, but avoids another sizer for border
        self.sizer.Add((0, 0), pos=(0, 4))
        self.sizer.Add((0, 0), pos=(6, 0))

        self.mail_send_button = wx.Button(self.panel, label="Send")
        self.mail_send_button.Bind(wx.EVT_BUTTON, self.OnClick_send)
        self.sizer.Add(self.mail_send_button, pos=(1, 1), span=(2, 1), flag=wx.EXPAND)

        self.mail_edit_button = wx.Button(self.panel, label="Edit")
        self.mail_edit_button.Bind(wx.EVT_BUTTON, self.OnClick_edit)
        self.sizer.Add(self.mail_edit_button, pos=(3, 1), span=(2, 1), flag=wx.EXPAND)

        self.from_staticText = wx.StaticText(self.panel, label="From:")
        self.sizer.Add(self.from_staticText, pos=(1, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.from_textCtrl = wx.TextCtrl(self.panel, value="from_mail@mymail.com")
        self.sizer.Add(self.from_textCtrl, pos=(1, 3), flag=wx.EXPAND)

        self.to_staticText = wx.StaticText(self.panel, label="To:")
        self.sizer.Add(self.to_staticText, pos=(2, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.to_textCtrl = wx.TextCtrl(self.panel, value=to)
        self.sizer.Add(self.to_textCtrl, pos=(2, 3), flag=wx.EXPAND)

        self.cc_staticText = wx.StaticText(self.panel, label="CC:")
        self.sizer.Add(self.cc_staticText, pos=(3, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.cc_textCtrl = wx.TextCtrl(self.panel, value=cc)
        self.sizer.Add(self.cc_textCtrl, pos=(3, 3), flag=wx.EXPAND)

        self.subject_staticText = wx.StaticText(self.panel, label="Subject:")
        self.sizer.Add(self.subject_staticText, pos=(4, 2), flag=wx.ALIGN_CENTER_VERTICAL)
        self.subject_textCtrl = wx.TextCtrl(self.panel, value=subject)
        self.sizer.Add(self.subject_textCtrl, pos=(4, 3), flag=wx.EXPAND)

        self.mail_textCtrl = wx.TextCtrl(self.panel, value=message_body, style=wx.TE_MULTILINE)
        self.sizer.Add(self.mail_textCtrl, pos=(5, 1), span=(1, 3), flag=wx.EXPAND)

        self.panel.SetSizer(self.sizer)
        self.main_sizer.Add(self.panel, 1, flag=wx.EXPAND)
        self.SetSizer(self.main_sizer)

        self.to_textCtrl.Disable()
        self.cc_textCtrl.Disable()
        self.subject_textCtrl.Disable()
        self.mail_textCtrl.Disable()

    def OnClick_send(self, event):
        self.to = self.to_textCtrl.GetValue()
        self.cc = self.cc_textCtrl.GetValue()
        self.subject = self.subject_textCtrl.GetValue()
        self.body = self.mail_textCtrl.GetValue()
        self.EndModal(wx.ID_OK)

    def OnClick_edit(self, event):
        self.to_textCtrl.Enable(True)
        self.cc_textCtrl.Enable(True)
        self.subject_textCtrl.Enable(True)
        self.mail_textCtrl.Enable(True)

    def GetValuesAsDict(self):
        d = {"to": self.to,
             "cc": self.cc,
             "subject": self.subject,
             "body": self.body}
        return d

app = wx.App(False)
dialog = EmailTemplate("tomail@mymail.com", "cc_copy@mymail.com", "message subject", "mail")
result = dialog.ShowModal()
if result == wx.ID_OK:
    # Maybe send here instead of print?
    print dialog.GetValuesAsDict()

请注意代码组成方式的差异。在您的情况下，差异可能很微妙，但如果您决定构建更大的东西，差异会更加显着。这也是使用 wxPython 的惯用方式，因此其他程序员会发现更容易理解您的代码。