All language subtitles for 013 Sending Images to the ImageList_en

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These are the user uploaded subtitles that are being translated: 1 00:00:00,820 --> 00:00:05,800 In the last section, we started working on our image list widget before we add any methods to this 2 00:00:05,800 --> 00:00:09,330 thing, I want to make sure that it gets displayed by the app widget. 3 00:00:09,820 --> 00:00:13,870 So I'm going to flip over to my app dart file at the very top. 4 00:00:13,870 --> 00:00:17,140 I'm going to import the image list widget that we just created. 5 00:00:18,260 --> 00:00:24,320 So I will import from the widgets folder, the image list, darte file. 6 00:00:27,700 --> 00:00:34,180 Now, to make sure that our app widget shows the image list, I'm going to find the app states builder 7 00:00:34,180 --> 00:00:34,630 method. 8 00:00:36,200 --> 00:00:42,140 Here's builded right here and somewhere inside of here, we need to create a new instance of image list 9 00:00:42,470 --> 00:00:47,330 that's going to make sure that any time the app widget shows on the screen, it will also show the image 10 00:00:47,330 --> 00:00:53,600 list, which is at present are scaffold, which it has a body parameter of that text counter. 11 00:00:54,050 --> 00:00:56,440 Now, we don't really need to show that text counter anymore. 12 00:00:56,480 --> 00:01:01,670 So I think that we should probably replace that text widget and instead show an instance of the image 13 00:01:01,670 --> 00:01:02,020 list. 14 00:01:02,810 --> 00:01:08,090 So for the body parameter right here, I will create a instance of image list. 15 00:01:09,430 --> 00:01:15,160 Now, any time that we create our copy of Image List right here and try to show it on the screen, the 16 00:01:15,160 --> 00:01:21,460 image list is definitely going to need that list of all the image models that we have fetched so far. 17 00:01:22,470 --> 00:01:28,830 So we need to take this list of images and pass it down to the image list widget, so to do so, I'm 18 00:01:28,830 --> 00:01:33,950 going to go back to the image list constructor right here, and I will pass images into it. 19 00:01:36,820 --> 00:01:38,110 OK, so that looks good. 20 00:01:38,140 --> 00:01:41,710 We've now communicated our list of images down to the image list. 21 00:01:42,320 --> 00:01:46,900 However, you'll notice we got the red squiggly right here is because we are trying to pass down an 22 00:01:46,900 --> 00:01:53,080 argument to the image list, but we have not yet configured the image list constructor to accept a list 23 00:01:53,080 --> 00:01:53,680 of images. 24 00:01:54,430 --> 00:02:00,370 So to make sure that the image list expects to get this list, I will open up my image list dirt file 25 00:02:00,370 --> 00:02:05,620 again, and I'm going to add a constructor method to this thing that's going to accept that list of 26 00:02:05,620 --> 00:02:08,650 images and assign it to an instance variable. 27 00:02:09,789 --> 00:02:12,580 I'll first put together the image list constructor. 28 00:02:14,640 --> 00:02:20,970 And this thing is going to accept a parameter as the first argument, we'll say distort images, and 29 00:02:20,970 --> 00:02:26,730 so because we put down this dot images, that is assuming that we're going to have a instant's variable 30 00:02:26,730 --> 00:02:27,900 called images. 31 00:02:28,740 --> 00:02:35,460 So I will say, just as we have before, we want a list that's going to contain image models. 32 00:02:36,450 --> 00:02:38,970 And we want to call that images like some. 33 00:02:40,500 --> 00:02:45,870 Now, when I do so, I'm going to flip over this thing right here, you know, I've got a little air 34 00:02:45,870 --> 00:02:46,860 on image list. 35 00:02:47,520 --> 00:02:52,110 One of the areas that we have at present is something that says that we are missing a implementation 36 00:02:52,110 --> 00:02:53,130 of the build method. 37 00:02:53,580 --> 00:02:55,670 OK, well, you know, that's to be expected. 38 00:02:55,680 --> 00:02:56,400 No problem there. 39 00:02:57,540 --> 00:02:59,240 But then we've got a second error. 40 00:02:59,910 --> 00:03:06,060 This one says that our class inherits from the class that is marked as immutable and therefore should 41 00:03:06,060 --> 00:03:07,200 also be immutable. 42 00:03:07,230 --> 00:03:13,500 Or another way that it puts it is to say that all the fields or all the instance variables on this class 43 00:03:13,500 --> 00:03:14,700 must be final. 44 00:03:15,390 --> 00:03:20,490 So we're seeing that error message right there because of how we defined this instance variable right 45 00:03:20,490 --> 00:03:20,810 here. 46 00:03:21,390 --> 00:03:22,650 So let's take a quick pause. 47 00:03:22,680 --> 00:03:27,180 We're going to come back and talk about why we're seeing this error message and it's going to tie back 48 00:03:27,180 --> 00:03:32,550 into that whole idea of how stateless widgets are supposed to have data that does not change over time. 49 00:03:33,060 --> 00:03:34,950 So quick break and I'll see you in just a minute. 4988

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