wxPython 一个很好的窗口、菜单创建例子

import wx
# -------- new: we need os module to handle path, dir stuffs-----------
import os

# ------- new: make our own id numbers --------------
ID_OPEN = 100
ID_SAVE = 101
ID_EXIT = 102
ID_ABOUT = 200

class SimpleEditor(wx.Frame):
def __init__(self, parent, id, title):
wx.Frame.__init__(self, parent, id, title, size = (700, 600))

# ---------------------create a text area ----------------------
self.text = wx.TextCtrl(self, 1, style=wx.TE_MULTILINE)

# ---------------------create a status bar ---------------------
self.CreateStatusBar()

# ---------------------create a menu bar -----------------------
menuBar = wx.MenuBar()

# ---------------------create a menu ---------------------------
# making two new menus
menuFile = wx.Menu()
menuHelp = wx.Menu()

# ------------- Changed: use our own id instead wx.ID_ANY ------------------

#menuFile.Append(wx.ID_ANY, '&Open', 'open a file')
#menuFile.Append(wx.ID_ANY, '&Save', 'save the file')

menuFile.Append(ID_OPEN, '&Open', 'open a file')
menuFile.Append(ID_SAVE, '&Save', 'save the file')
# ----------------------------------------------------------------------

# adding a separator to separate the menu list
menuFile.AppendSeparator()

# ------------- Changed: use our own id instead wx.ID_ANY ------------------

#menuFile.Append(wx.ID_ANY, 'E&xit', 'terminate the program')
#menuHelp.Append(wx.ID_ANY, 'A&bout', 'info about this program')

menuFile.Append(ID_EXIT, 'E&xit', 'terminate the program')
menuHelp.Append(ID_ABOUT, 'A&bout', 'info about this program')
# -------------------------------------------------------------------------

# add the menu list we made to menu bar
# This will show 'File' on the menu bar
menuBar.Append(menuFile, '&File')
# This will show 'Help' on the menu bar
menuBar.Append(menuHelp, '&Help')

# Last step, set the menu bar
self.SetMenuBar(menuBar)

# ------------------------- new: 4 events handler -------------------------------

wx.EVT_MENU(self, ID_OPEN, self.OnOpen)
wx.EVT_MENU(self, ID_SAVE, self.OnSave)
wx.EVT_MENU(self, ID_EXIT, self.OnExit)
wx.EVT_MENU(self, ID_ABOUT, self.OnAbout)

# ---------------------- new: Declare 4 functions for the events--------------------------

# open file when you click File -> open
def OnOpen(self, event):
# open a file using wx.FileDialog
# wx.FileDialog(self, parent, message = FileSelectorPromptStr, defaultDir = EmptyString, defaultFile = EmptyString,
#                           wildcard = FileSelectorDefaultWildcardStr, style = FD_DEFAULT_STYLE, pos = DefaultPosition)
dlg = wx.FileDialog(self, message = 'Choose a file', defaultDir = '',
defaultFile = '', wildcard = '*.*', style = wx.OPEN)
# if we click 'OK' button it do something
if dlg.ShowModal() == wx.ID_OK:
# get the file name and directory
self.filename = dlg.GetFilename()
self.dirname = dlg.GetDirectory()
# add the directory path and file name
f = open(os.path.join(self.dirname, self.filename),'r')
# read the file , show on the text area
self.text.SetValue(f.read())
f.close()
dlg.Destroy()

# save file when you click File -> save
def OnSave(self, event):
# get the current value from text area
itcontains = self.text.GetValue()
# overwrite the same file with current value
f = open(os.path.join(self.dirname, self.filename), 'w')
f.write(itcontains)

f.close()

# exit program when you click File -> exit
def OnExit(self, event):
# close the frame
self.Close(True)

# about this program Help -> About
def OnAbout(self, event):
# make a message dialog
# wx.MessageDialog(self, parent, message, caption=MessageBoxCaptionStr,
#                                 style=wxOK|wxCANCEL|wxCENTRE, pos=DefaultPosition)
dlg = wx.MessageDialog(self, message = 'A simple editor created by wxPython!\n'
'author : eookoo \n date : Apr 4, 2007',  caption = 'About this program', style = wx.OK)
# show the message dialog
dlg.ShowModal()
# we destroy it when finished
dlg.Destroy()
# ----------------------------------------------------------------------------------------------

if __name__=='__main__':
app = wx.PySimpleApp()
frame = SimpleEditor(None, wx.ID_ANY, 'Simple Editor')
frame.Show()
app.MainLoop()