牡蛎的混沌世界

真是烦人，碰到一些问题，解决不了，几个mail list或者bbs上都提出了问题，但是就是无人可以解决，放出来看看有没有奇迹发生吧。我使用win2k、py24和25

1.用wxpython编写一个简单网页浏览器，其实也不简单，因为——如何捕获那些新弹出的页面（newwindow2）事件，并且让新页面可以显示在当前的frame中或者新的frame中——而绝不是在系统默认的浏览器中弹出

2.http://osdir.com/ml/python.ctypes/2005-09/msg00024.html提出一种跨平台的、返回FILE指针的方案，
import sys
import ctypes
class FILE(ctypes.Structure):pass

FILE_P = ctypes.POINTER(FILE)

PyFile_AsFile = ctypes.pythonapi.PyFile_AsFile
PyFile_AsFile.argtypes = [ctypes.py_object]
PyFile_AsFile.restype = FILE_P

stdout_file = PyFile_AsFile(sys.stdout)

fputs=ctypes.cdll.msvcrt.fputs
fputs.argtypes=[ctypes.c_char_p, FILE_P]
fputs.restype=ctypes.c_int
fputs("Hello, there.\n", stdout_file)
但是这个代码只会出错
H:\sap-24>h:\python25\python pyfile2.py
Traceback (most recent call last):
File "pyfile2.py", line 17, in
fputs("Hello, there.\n", stdout_file)
WindowsError: exception: access violation writing 0x00000010

3.我打算用ctypes+wx.net的wx-c.dll实现一个较小的GUI方案（也就是，我知道wxPython之类的，不用麻烦各位再推荐），这里的代码虽然可以显示frame，但是总是报错说“unexpected parameter 'mini.py'”，于是不得不点击“确定”按钮退出。其中mini.py是我的程序的名字。wx-c.dll取自http://prdownloads.sourceforge.net/wxnet/wx.NET-0.7.2-Windows-Build.zip?download ——是的，这是一个纯C的wxWidget接口，不是C++也不是.NET的，wx.net以及www.freebasic.net均使用它开发GUI程序
from ctypes import *

wx=CDLL('wx-c.dll')

class _wxApp(Structure):pass
PTR_wxApp=POINTER(_wxApp)

wxApp=wx.wxApp_ctor
wxApp.restype=PTR_wxApp

wxApp_RegisterVirtual=wx.wxApp_RegisterVirtual
wxApp_RegisterVirtual.restype=None

_wxApp_Run=wx.wxApp_Run
_wxApp_Run.restype=None
def wxApp_Run():
    argc=0
    argv=''
_wxApp_Run(argc, argv)

class _wxFrame(Structure):pass
PTR_wxFrame=POINTER(_wxFrame)

wxFrame=wx.wxFrame_ctor
wxFrame.restype=PTR_wxFrame

class _wxFrame(Structure): pass
PTR_wxFrame=POINTER(_wxFrame)
wxFrame_Create=wx.wxFrame_Create
wxFrame_Create.restype=c_int

class _wxSize(Structure): pass
PTR_wxSize=POINTER(_wxSize)

wxSize=wx.wxSize_ctor
wxSize.restype=PTR_wxSize

wxWindow_Show=wx.wxWindow_Show
wxWindow_Show.restype=None

wxApp_OnInit=wx.wxApp_OnInit
wxApp_OnInit.restype=c_int

class _wxBoxSizer(Structure):pass
PTR_wxBoxSizer=POINTER(_wxBoxSizer)
wxBoxSizer=wx.wxBoxSizer_ctor
wxBoxSizer.restype=PTR_wxBoxSizer

wxWindow_SetAutoLayout=wx.wxWindow_SetAutoLayout
wxWindow_SetAutoLayout.restype=None

wxWindow_SetSizerAndFit=wx.wxWindow_SetSizerAndFit
wxWindow_SetSizerAndFit.restype=None

def Callback(restype=None, *optional):
    return CFUNCTYPE(restype, *optional)

wxDEFAULT_FRAME_STYLE =(0x0800|0x0040|0x0400|0x0200|0x20000000|0x00400000)

global app, sizer

@Callback(c_int)
def App_OnInit( ):
    global app, sizer
    frame = wxFrame( )
    wxFrame_Create( frame, 0, 1, "Pure python Wxwidget",
                                 wxSize( -1, -1 ), wxSize( -1, -1 ),
                                 wxDEFAULT_FRAME_STYLE , "frame")
                                 wxWindow_Show( frame, 1 )
    return wxApp_OnInit( app )

@Callback(c_int)
def App_OnExit():
    return wxApp_OnExit( app )

app = wxApp( )
wxApp_RegisterVirtual( app, App_OnInit, App_OnExit )
wxApp_Run()

4.打算写一个所见所得（WYSIWG）的图文编辑器，但是发现wxPython保存文件时，把图片嵌入其中了，而我需要的是，保存文件的本地文件名。在wxPython的列表上提问，答案是自定义io文件格式的接口仍不可用

5.实在看不去和wxPython官方例子区别何在的代码
使用wxpython-2.8-msw-unicode的RichTextCtrl，但是ctrl+c/v/p/x/y都会报告
Traceback (most recent call last):
File "H:\bug_main.py", line 67, in ForwardEvent
self.rtc.ProcessEvent(evt)
RuntimeError: maximum recursion depth exceeded

但是wxpython自带的dem\RichTextCtrl.py却不会报错，所以问题应该是在我的代码中。

无奈检查不出来——我的evt处理，实在看不出和原版的demo有什么不同——哪位帮忙指
点一下迷津吧（请别说os.sys.setrecursionlimit)，谢谢

报错的代码

import wx
import wx.richtext as rt

class MyFrame(wx.Frame):
    def __init__(self, *args, **kwds):
        kwds["style"] = wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)

        # Menu Bar
        self.frame_1_menubar = wx.MenuBar()
        self.fileMenu = wx.Menu()
        self.mnuitmFileExit = wx.MenuItem(self.fileMenu, wx.NewId(),
                          "E&xit\tCtrl+Q", "", wx.ITEM_NORMAL)
        self.fileMenu.AppendItem(self.mnuitmFileExit)
        self.frame_1_menubar.Append(self.fileMenu, "&File")
        self.editMenu = wx.Menu()

        self.mnuitmEditUndo = wx.MenuItem(self.editMenu, wx.NewId(),
                        "&Undo\tCtrl+Z", "", wx.ITEM_NORMAL)
        self.editMenu.AppendItem(self.mnuitmEditUndo)
        self.mnuitmEditRedo = wx.MenuItem(self.editMenu, wx.NewId(),
                        "&Redo\tCtrl+Y", "", wx.ITEM_NORMAL)
        self.editMenu.AppendItem(self.mnuitmEditRedo)
        self.mnuitmEditCut = wx.MenuItem(self.editMenu, wx.NewId(),
                        "Cu&t\tCtrl+X", "", wx.ITEM_NORMAL)
        self.editMenu.AppendItem(self.mnuitmEditCut)
        self.mnuitmEditCopy = wx.MenuItem(self.editMenu, wx.NewId(),
                        "&Copy\tCtrl+C", "", wx.ITEM_NORMAL)
        self.editMenu.AppendItem(self.mnuitmEditCopy)
        self.mnuitmEditPaste = wx.MenuItem(self.editMenu, wx.NewId(),
                        "&Paste\tCtrl+V", "", wx.ITEM_NORMAL)
        self.editMenu.AppendItem(self.mnuitmEditPaste)
        self.frame_1_menubar.Append(self.editMenu, "&Edit")

        self.SetMenuBar(self.frame_1_menubar)
        # Menu Bar end

        self.rtc = rt.RichTextCtrl(self, -1, style=wx.VSCROLL|wx.HSCROLL)
        self.__set_properties()
        self.__do_layout()

        self.Bind(wx.EVT_MENU, self.onFileExit, self.mnuitmFileExit)
        self.Bind(wx.EVT_MENU, self.ForwardEvent, self.mnuitmEditUndo)
        self.Bind(wx.EVT_MENU, self.ForwardEvent, self.mnuitmEditRedo)
        self.Bind(wx.EVT_MENU, self.ForwardEvent, self.mnuitmEditCut)
        self.Bind(wx.EVT_MENU, self.ForwardEvent, self.mnuitmEditCopy)
        self.Bind(wx.EVT_MENU, self.ForwardEvent, self.mnuitmEditPaste)

    def __set_properties(self):
        wx.CallAfter(self.rtc.SetFocus)
        self.rtc.Freeze()
        self.rtc.WriteText("Hello")
        self.rtc.Thaw()

    def __do_layout(self):
        grid_sizer_1 = wx.FlexGridSizer(1, 1, 5, 0)
        grid_sizer_4 = wx.FlexGridSizer(5, 1, 2, 0)
        grid_sizer_4.Add(self.rtc, 0, wx.EXPAND, 0)
        grid_sizer_4.AddGrowableRow(0)
        grid_sizer_4.AddGrowableCol(0)
        grid_sizer_1.Add(grid_sizer_4, 1, wx.ALL|wx.EXPAND, 0)
        self.SetSizer(grid_sizer_1)
        grid_sizer_1.Fit(self)
        grid_sizer_1.AddGrowableRow(0)
        grid_sizer_1.AddGrowableCol(0)
        self.Layout()
        self.Centre()

    def onFileExit(self, evt):
        self.Close(True)

    def ForwardEvent(self, evt):
        self.rtc.ProcessEvent(evt)
   
if __name__ == "__main__":
        app = wx.PySimpleApp(0)
        wx.InitAllImageHandlers()
        frame_1 = MyFrame(None, -1, "")
        app.SetTopWindow(frame_1)
        frame_1.Show()
        app.MainLoop()