So, we're gonna do a pop-up window, an alert window, like you do with JavaScript. 0:00 And TkInter has one. 0:04 But we can't use it from TkInter.whatever. 0:05 We have to import it on its own. 0:08 So, we'll say from tkinter import messagebox. 0:10 And there are a lot of different message boxes. 0:13 Some ask a question and the user can answer with a yes or no. 0:16 Others accept input, like a text box to take in information. 0:19 And some, like the one that we're gonna use, are just for sharing information. 0:24 So, it's just going to put out a message. 0:28 So let's go down here. 0:30 Let's make a new function. 0:33 And we're going to call it alert cuz it's our alert. 0:36 And since it's going to get triggered, as well, we need it to take args. 0:40 All right. 0:47 So, we're gonna say, if not self.time left.get(). 0:48 So, if there are no seconds left, then we want to do message box.showinfo(). 0:55 And then the title that we want on the window, 1:02 this right here says pymodoro.pi gui blah, blah, blah. 1:05 We want that to say Timer done. 1:09 I suppose it could say Pymodoro or something. 1:11 And then our message is just going to be, Your timer is done! 1:14 Super, super exciting [LAUGH] there. 1:17 Okay, but now, how do I want to fire this off? 1:21 So, we need to actually watch for stuff to happen and then fire this off. 1:24 And this really make sense to have fired whenever this runs out. 1:28 Now, I don't want to do it and update because that's weird. 1:32 I've had to watch for running conditions and make sure the start button is disabled 1:35 or the stop button is enabled, and then, it's just a lot of trouble. 1:39 So, let's not worry about that. 1:43 Let's do it with another trace. 1:44 So, if we come back up here to our init, and we have this time left. 1:47 Let's do self.time_left.trace, and 1:53 we want whenever this is written to, to call self.alert. 1:57 So, whenever our update method changes the number of seconds that are left, 2:03 our alert method checks to see if it should fire the message box. 2:07 Let's try this out. 2:12 And I have a feeling this may end up firing off a second or 2:14 two early due to the order of stuff. 2:16 But not that big of a deal, especially not in something that we're just like, 2:21 [NOISE] let's see what we can build. 2:23 Feel free to experiment and see if you can make it not do that. 2:25 But let's see, so four, three, two, one. 2:28 Our timer's done, cool. 2:33 So, yeah, you can see it's about a second early, 2:36 it fires off, but not that big of a deal. 2:39 So, there you go. 2:42 In just a few short videos, and I don't know, 100 lines of code? 2:43 Let's see, how many lines did we add here? 2:49 114! 2:52 114 lines of code, a few short videos, we have built a fully function Pymodoro 2:54 application that'll let us do a lot of work very, very quickly. 2:58 While our little app might not do much, it gives us a good glimpse of what all we can 3:04 do with the Kintor and the rest of Python. 3:08 Whether you're building your whole app into Kintor or just using it at a proof 3:10 of concept, I think this library will serve you well in the future. 3:13 I know people making games in it, and even using TkIntor to control lasers. 3:17 I can't wait to see what you do with it. 3:20