try2.py

import wx
import os

class TextEdit(wx.Frame): #TextEdit inherits from wx.Frame
   """adds multiline textbox to wx.Frame"""
   def __init__(self, parent, title):
    wx.Frame.__init__(self, parent, title = title, size = (400, 450))
    self.control = wx.TextCtrl(self, style = wx.TE_MULTILINE)
    self.CreateStatusBar()

    menu = wx.Menu() #menu creation
    menuNew = menu.Append(wx.ID_NEW, "&New", "Create a new file")
    menuSave = menu.Append(wx.ID_SAVE, "&Save", "Save to file")
    menuSaveAs = menu.Append(wx.ID_SAVEAS, "Save As", "Save to new file")
    menuOpen = menu.Append(wx.ID_OPEN, "&Open", "Open a text file")
    menuExit = menu.Append(wx.ID_EXIT, "&Quit", "End program")

    helpMenu = wx.Menu()
    menuAbout = helpMenu.Append(wx.ID_ABOUT, "&About", "Info about program")
    menuHelp = helpMenu.Append(wx.ID_HELP, "&Help", "Get help figuring out the program")

    menuBar = wx.MenuBar() #MenuBar creation
    menuBar.Append(menu, "&File") #add menu to menuBar and call it File
    menuBar.Append(helpMenu, "Help") #add menu to menuBar and call it Help
    self.SetMenuBar(menuBar) #add menuBar to Frame

    #event handling
    self.Bind(wx.EVT_MENU, self.OnNew, menuNew)
    self.Bind(wx.EVT_MENU, self.OnSave, menuSave)
    self.Bind(wx.EVT_MENU, self.OnSaveAs, menuSaveAs)
    self.Bind(wx.EVT_MENU, self.OnOpen, menuOpen)
    self.Bind(wx.EVT_MENU, self.OnExit, menuExit)
    self.Bind(wx.EVT_MENU, self.OnAbout, menuAbout)
    self.Bind(wx.EVT_MENU, self.OnHelp, menuHelp)

    self.fileName = ""
    self.dirName = ""

    self.Show(True) #this line always at the end of the function

   def OnNew(self, e):
    """Creates a new text file"""
    #wx.ID_EXIT only closes one window with this method. TODO: make it more dependent
    TextEdit(None, "New Text File")
   def OnSave(self, e):
    #I/O stuff here
    if (self.fileName != "") and (self.dirName != ""):
       content = self.control.GetValue() #obtain content
       filehandle = open(os.path.join(self.dirName, self.fileName), "w")
       filehandle.write(content)
       filehandle.close()
    else:
       return self.OnSaveAs(e)
   def OnSaveAs(self, e):
    dbox = wx.FileDialog(self, "Choose a file", self.dirName, "", "*.*", wx.SAVE | wx.OVERWRITE_PROMPT)
    if dbox.ShowModal() == wx.ID_OK:
       content = self.control.GetValue() #obtain content
       self.fileName = dbox.GetFilename()
       self.dirName = dbox.GetDirectory()
       filehandle = open(os.path.join(self.dirName, self.fileName), "w")
       filehandle.write(content)
       filehandle.close()
       dbox.Destroy()
   def OnOpen(self, e):
    #I/O stuff here
    """Open file"""
    self.dirName = " " #why necessary?
    dbox = wx.FileDialog(self, "Find your file", self.dirName, "","*.*", wx.OPEN | wx.MULTIPLE | wx.CHANGE_DIR)
    if dbox.ShowModal() == wx.ID_OK:
       self.fileName = dbox.GetFilename()
       self.dirName = dbox.GetDirectory()
       x = open(os.path.join(self.dirName, self.fileName), "r")
       self.control.SetValue(x.read())
       x.close()
    dbox.Destroy()
   def OnExit(self, e):
    """Exits program by closing frame"""
    self.Close(True) #close frame
   def OnAbout(self, e):
    """Displays info about program"""
    dbox = wx.MessageDialog(self, "A simple text editor built for practice", "about TextEdit", wx.OK)
    dbox.ShowModal()
    dbox.Destroy()
   def OnHelp(self, e):
    """Displays helpful information, hopefully"""
    dbox = wx.MessageDialog(self, "Please visit the website ___ for help with this program.", "Help", wx.OK)
    dbox.ShowModal()
    dbox.Destroy()

app = wx.App(False)
frame = TextEdit(None, "Editor")
app.MainLoop()