Displaying transient notifications

If your application needs to occasionally get the user's attention and present some information that may not be critical or require acknowledgement, the ToasterBox window can be a nice and unobtrusive way to show simple messages to the user. In this recipe, we will make a small TrayIcon application that acts as a timer, which pops up a notification every time a set amount of time has elapsed.

How to do it…

Here are the steps that you need to perform:

1. First, we need an additional import from wx.lib to access ToasterBox. For this, we will uses the following code:

   import wx
   import wx.lib.agw.toasterbox as tb
   
   ID_GET_DUR = wx.NewId()
   ID_START = wx.NewId()

2. Next, let's make a custom TaskBarIcon object to manage our alarm notifications, as follows:

   class AlarmIcon(wx.TaskBarIcon):
       def __init__(self, topWindow):
           super(AlarmIcon, self).__init__()
   
           self._topWindow = topWindow
           self._timer = wx.Timer(self)
           self._duration = 10
   
          ...