All language subtitles for 3. How to Use Intention Actions

So now that we're pretty much done with the design of our user interface, there's only one thing that
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looks a little bit different from our original intention.
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It's the fact that the dice images should probably be in the center of the screen. And it should have a
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little bit of padding from the edges.
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Let's go ahead and implement those changes.
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Previously whenever we needed to embed a widget inside another widget, or add another widget somewhere
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into the widget tree, we've always taken our widget out say, remove our row widget here and all its children
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and instead return something like a center widget, which has a child which is now going to be the row
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widget. And you can see that when I put that in there, and I delete all the parts I don't need, and I move
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that semicolon down to the closing bracket for center, and add a comma there,
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then you can see that this does what I need to do, which is to move our row into the center of the screen.
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But that was kind of fiddly and especially messing around with the semicolons and commas.
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You're bound to have issues eventually down the road.
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So I want to show you a much easier way, and you're going to be using this a lot once you discover it.
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Now it's important to first show you what the pain points are, which is why I've kept this in the secret
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bag until now.
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Let's say that we want to do the same thing as we did before.
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We want to move our row from the top left corner of the body, which is this part below the app bar, all the
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way to take up the center of the space.
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So we need a center widget around our row.
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And essentially, what we want to do, is to insert a center widget at this point here.
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So below the scaffold but above the row, so that all of the row and the expanded widgets and dice images
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are contained inside this center widget. So the widget that we want to embed inside a new widget is the
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row.
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And instead of cutting it out and moving it somewhere else before replanting it back here, we can simply
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select it.
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So put our cursor anywhere on the word row, and then go into our Flutter outline and we can click on
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this button right here.
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And if you hover over it for long enough, it'll tell you this button will center the widget that you've
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currently got selected.
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So in the outline you can see we've got the rows selected. When you click on it in the code,
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It will move the selection in the tree.
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But this is what we want to select and we're going to click on this button, and it will automatically
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add that center widget around the row, which is almost like wizardry.
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The beauty of this is that it'll move the semicolons or commas as needed.
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It'll add that child property and we don't have to do anything other than just click on a button.
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Now, there's many ways of actually getting Flutter to embed or add, and there's other things that we can
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do automatically as well.
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For example, if we wanted to embed our, I don't know, row inside a column, we could simply click on this 'wrap
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with column' button, and now our row is inside a column.
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I'm going to hit COMMAND + Z to go back before we get really lost in messing around with all the buttons.
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But, another way of doing this is you can simply select the element inside the widget tree here, and you
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can right click on it to send to the widget or add padding or wrap with column, wrap with row, wrap with
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container.
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And these are pretty much all of the most common things that you will want to do.
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But sometimes, you might want to do something that's a little bit more specific, such as what if we wanted
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to remove this expanded widget out of the tree.
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But I wanted to leave the image widget where it is. Essentially,
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I want to simply pluck that expanded widget out of the tree, and make the dice1 image a child of the
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row, without having an expanded widget around it. Again,
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normally that would be really really painful.
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And over here you can't actually really do it when you right click, right?
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What I need is a delete widget.
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Now you can get access to that if you click in your code and you go over to that light bulb that shows
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up.
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And if you click on the dropdown list, you can see, oh we have more things that we can do.
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We can remove our widget.
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We can move our widget down, so that this one becomes the second child in the row, and it gets moved over
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to the right of the row. Or we can remove widget.
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And that achieves exactly what we were talking about which is removing the expanded widget from the
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tree, but leaving the image where it is inside the row.
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Now, I didn't actually want to do that because our design now looks like this. But I wanted to be able
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to show you what you can do by tapping into these so called intention actions.
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You can add padding, you can send to the widget, everything that we saw over here and there's more,
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right?
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For example, let me remove my expanded widget, and go back to the scenario where I wanted to wrap our
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image inside an expanded widget. Instead of cutting it out, moving it around, doing all sorts of complicated
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things,
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I could have just clicked on the light bulb and clicked on 'wrap with new widget' and it will wrap my widget
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inside a new widget at that position in the tree.
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And now I get to type 'expanded' and it does exactly the same thing. My widget is now inserted into the
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tree, and my image now looks as it should. The light bulb will show up
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once you click on something that has these intention actions. So namely, in Android Studio,
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if you have the dark mode enabled, it'll be something yellow, like center or row or expanded. One of the
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widgets
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basically. If you wanted to pull up that menu without needing your mouse, then you can move your cursor
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to the widget that you want to embed or delete or do something to, and then hold down OPTION or ALT
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and hit ENTER.
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So it'll be ALT + ENTER for Windows, and OPTION + ENTER for Mac. and then you pull up that menu anyways and
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this will be a really fast way of adding padding, of removing widgets, of doing all of these intention
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actions.
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And actually, what I want to do right now, is to add some padding around our dice images, so our expanded
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widgets, in order for it to look a bit more like this.
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So there's a bit of space in between the images and also from the sides of the screen.
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So using the intention actions menu that we just talked about, can you insert 16 pixels of padding around
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both dice, so that they end up looking like this. Pause video, and try and complete this challenge.
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We've got our two image widgets, which we need padding around.
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So all we need to do, is to put our cursor onto the widget that we need to pad, and we're going to hold
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down OPTION or ALT, and hit ENTER. And then we're gonna select add padding. And automatically, a whole
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bunch of code gets written for us.
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And it's so simple that you could almost just hit TAB all day long, and get all your code written.
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Now by default, when we insert padding it adds eight pixels of padding around all four edges, but that's
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not enough for us.
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So we're going to change that to 16.
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And now, we have our images nicely padded.
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And I can do the same thing to my other image. Add padding and change it to 16.
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So now that we've achieved the look that we want, we're finally ready to start adding functionality to
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our app.
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So for all of that and more, I see on the next lesson.