# Getting Started "More magic" section
# Using new wx namespace and namespace qualification style
import wx
ID_ABOUT = 101
ID_EXIT  = 110
ID_OPEN  = 111
class MainWindow(wx.Frame):
    """ We simply derive a new class of Frame. """
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, wx.ID_ANY, title, size = (200, 100))
        self.control = wx.TextCtrl(self, 1, style=wx.TE_MULTILINE)
        self.CreateStatusBar() # A statusbar in the bottom of the window
        #Setting up the menu
        filemenu=wx.Menu()
        filemenu.Append(ID_OPEN, "&Open","Open a file")
        filemenu.Append(ID_ABOUT, "&About","Information about this program")
        filemenu.AppendSeparator()
        filemenu.Append(ID_EXIT, "E&xit", "Terminate the program")
        # Creating the menubar
        menuBar=wx.MenuBar()
        menuBar.Append(filemenu, "&File",) #Adding the filemenu to the MenuBar
        self.SetMenuBar(menuBar) #Adding the MenuBar to the Frame content
        wx.EVT_MENU(self, ID_OPEN, self.OnOpen)   #attach the menu-event ID_OPEN to method self.OnOpen
        wx.EVT_MENU(self, ID_ABOUT, self.OnAbout) #attach the menu-event ID_ABOUT to method self.OnAbout
        wx.EVT_MENU(self, ID_EXIT, self.OnExit)   #attach the menu-event ID_EXIT to method self.OnExit
        self.Show(True) # Note the capital on 'True'
    def OnAbout(self, e):
        d=wx.MessageDialog(self, "A sample editor \n" "in wxPython", "About Sample Editor", wx.OK)
                          #Create a message dialog box
        d.ShowModal() # Shows it
        d.Destroy() # finally destroy it when finished
    def OnExit(self, e):
        self.Close(True) #Close the frame, note capitalization of 'T' in 'True'
    def OnOpen(self, e):
        """ Open a file"""
        import os                # might not be optimal spot, but pedagogically clear, move if implement 'Save'
        self.dirname=os.getcwd()
        dlg = wx.FileDialog(self, "Choose a file", self.dirname, "", "*.*", wx.OPEN)
        if dlg.ShowModal() == wx.ID_OK:
            self.filename=dlg.GetFilename()
            self.dirname=dlg.GetDirectory()
            f=open(os.path.join(self.dirname, self.filename), 'r')
            self.control.SetValue(f.read())
            f.close()
        dlg.Destroy()


app = wx.PySimpleApp()

try: 
    frame = MainWindow(None, -1, "Sample editor")
    app.MainLoop()
finally:
    del app