from wxPython.wx import *

ID_ABOUT = 101
ID_EXIT  = 102

class MyCanvas(wxScrolledWindow):
    def __init__(self, parent, id = -1, size = wxDefaultSize):
        wxScrolledWindow.__init__(self, parent, id, wxPoint(0, 0), size, 
wxSUNKEN_BORDER)

        self.maxWidth  = 1000
        self.maxHeight = 1000

        self.SetBackgroundColour("WHITE")
        self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)

        #self.buffer = wxEmptyBitmap(self.maxWidth, self.maxHeight)
        #dc = wxBufferedDC(None, self.buffer)
        dc = wxClientDC(self) #, self.buffer)
        #dc.SetBackground(wxBrush(self.GetBackgroundColour()))
        #dc.Clear()

        dc.BeginDrawing()
        dc.SetPen(wxPen('RED',3))
        dc.DrawRectangle(5, 5, 200, 200)
        dc.EndDrawing()
       
class MyFrame(wxFrame):
    def __init__(self, parent, ID, title):
        wxFrame.__init__(self, parent, ID, title,wxDefaultPosition, 
                         wxSize(400, 300))

        #Status Bar Items
        self.CreateStatusBar()
        self.SetStatusText("This is the statusbar")
   
    #Create Menu Items
        menu = wxMenu()
        menu.Append(ID_ABOUT, "&About","More information about this program")
        menu.AppendSeparator()
        menu.Append(ID_EXIT, "E&xit", "Terminate the program")
   
    # Create the menu bar
        menuBar = wxMenuBar()
        menuBar.Append(menu, "&File");
        self.SetMenuBar(menuBar)
   
    # Create the scrolled window
        canvas = MyCanvas(self)

        #Event Handlers
        EVT_MENU(self, ID_ABOUT, self.OnAbout)
        EVT_MENU(self, ID_EXIT,  self.TimeToQuit)

    #Event Methods
    def OnAbout(self, event):
        dlg = wxMessageDialog(self, "This sample program shows off\n"
                              "frames, menus, statusbars, and this\n"
                              "message dialog.",
                              "About Me", wxOK | wxICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()
        self.SetStatusText("This is the statusbar")


    def TimeToQuit(self, event):
        self.Close(true)

class MyApp(wxApp):
    def OnInit(self):
        frame = MyFrame(NULL, -1, "Thom's Simple Application")
        frame.Show(true)
        self.SetTopWindow(frame)
        return true

app = MyApp(0)
app.MainLoop()