wxpython Events identifiers global ids

wxpython Events identifiers global ids

 
import wx

ID_MENU_NEW = wx.NewId()
ID_MENU_OPEN = wx.NewId()
ID_MENU_SAVE = wx.NewId()

class Example(wx.Frame):
           
    def __init__(self, *args, **kw):
        super(Example, self).__init__(*args, **kw) 
        
        self.InitUI()
                
    def InitUI(self):
        
        self.CreateMenuBar()
        self.CreateStatusBar()
        
        self.SetSize((250, 180))
        self.SetTitle('Global ids')
        self.Centre()
        self.Show(True)  
        
    def CreateMenuBar(self):
        
        mb = wx.MenuBar()
        
        fMenu = wx.Menu()
        fMenu.Append(ID_MENU_NEW, 'New')
        fMenu.Append(ID_MENU_OPEN, 'Open')
        fMenu.Append(ID_MENU_SAVE, 'Save')
        
        mb.Append(fMenu, '&File')
        self.SetMenuBar(mb)
        
        self.Bind(wx.EVT_MENU, self.DisplayMessage, id=ID_MENU_NEW)
        self.Bind(wx.EVT_MENU, self.DisplayMessage, id=ID_MENU_OPEN)
        self.Bind(wx.EVT_MENU, self.DisplayMessage, id=ID_MENU_SAVE)        
        
    def DisplayMessage(self, e):
        
        sb = self.GetStatusBar()
                
        eid = e.GetId()
        
        if eid == ID_MENU_NEW:
            msg = 'New menu item selected'
        elif eid == ID_MENU_OPEN:
            msg = 'Open menu item selected'
        elif eid == ID_MENU_SAVE:
            msg = 'Save menu item selected'
        
        sb.SetStatusText(msg)

def main():
    
    ex = wx.App()
    Example(None)
    ex.MainLoop()    


if __name__ == '__main__':
    main()