.Net Foundation Xamarin Community Standups, 4 Apr 2019

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From YouTube: Xamarin: .NET Community Standup - Xamarin.Forms Previewer Updates & iOS Interpreter!

Description

Join the Mobile .NET Teams for our community standup covering great community contributions for Mobile .NET, Xamarin, and more.

Links: https://aka.ms/xamarin-standup-april19

Follow:
* James Montemagno - http://twitter.com/jamesmontemagno
* Maddy Leger - http://twitter.com/maddyleger1
* David Ortinau - http://twitter.com/davidortinau

A

Hey we're back welcome back everyone to the xamarin dotnet community stand up, look at how many people I fit on this thing.

B

A

We have xamarin people non xamarin people, but we're all one big dotnet family exactly well welcome everyone. If you are brand-new, this is the dotnet xamarin community stand up. We focus on all things in the world of xamarin and dotnet. So we do this twice a week. Asp.Net does it on Tuesdays and then xamarin is the first Thursday of every month. I can't believe that it is April ready, alright seriously.

B

A

Already spring, it's totally happening: Visual Studio 2019 is out. It's totally happening. A lot of new people in the chat. Welcome Steven losses in here Miguel's in here, Matt Lee woods got zamarons everywhere, so our community stand up if you're brand new here's what we do one-on-one before we introduce everyone. We introduce everyone until you who the heck is here. We go through community links and blog post, some awesome PRS, and then we do some great demos.

A

We have some awesome stuff lined up for you today, but I do have multiple special guests and I have a fine gentleman right here. Next to me,.

B

Thanks a lot James, yes, so so my name is Daniel I'm a program manager on the visual studio team specifically focused on tools for zamore windows developers. So after building a WPF application or a uwp application, you're using my tools, I work very closely with the xamarin team to collaborate on tools with the.net team with the windows teams. So, if you're ever having an issue with Windows development, you can definitely let me know and I'll make sure it gets to the right person. That's what I do.

A

Go Manny and yeah.

C

I'm Matty Legere I'm, a p.m. on the xamarin forms team working on xamarin forms ammo stuff, so you can call me the daniel jacobson of xamarin. It's a very cool job anytime that the previewer breaks for you or anything like that. You can tweet me.

D

The daniel jacobson of xamarin, I loved it. I'm david work now senior program manager with xamarin mobile sdk, so anything iOS Android forms components. If you're looking for a point of contact, you can reach out to me- and we have here today with us, Chris Hammonds, Chris, hey.

E

Everybody, my name is Chris Hammonds I'm, the manager for the xamarin, iOS and Mac team. So we work on iOS and Mac and Apple TV and watch as well. So pretty excited be here. Super.

A

Excited Chris did an awesome, blog post about the iOS interpreter, so I didn't know exactly what all that meant. So I was like. Let's have an expert on and and have him talk about, the sec. He was graceful Chris justness enough to to come on Daniels, just kind of sitting you like. Why was this guy doing so he Daniel we're gonna, be doing a desktop stand-up. The last Thursday of you yeah.

B

A

Gonna, give it a give it a go. Usually we do clouds, we might be doing back and forth, there's a lot of exciting stuff with Wattana, core 3 and all sorts of shenanigans. Oh, we got lots to talk about, so we're really excited to have our first stand-up later this month.

B

A

Just shipped a Donna core, 3 WPF app using MSI X, if did to the Microsoft Store nice in a week I, did it I've stream that that's fun. You did too right. So you have automatic deployments everything through Azure DevOps, pretty else I couldn't believe it worked in and I did so alright. So let's go through some things. So, if you're, if you're new, we like to go through community links and kind of go through everything: oh I'm, James, Monta, Magna, I'm, a program manager.

A

And yeah: let's just go through this really quick, there's some really great community stuff and feel free to ask questions, we're monitoring, Facebook, twitch and YouTube. So if you have any questions, let us know Steven does ask: where can we find your Twitter handles on the YouTube page and on channel 9 they're, usually in the show notes, description? Actually, I can pull that up to. Let me show that really quick over here.

A

When you come over to the channel 9 page MSDN comm, you can go to shows and you're actually going to find the dotnet community stand up. We just launched this a few weeks ago and what's cool about this, is that you'll find the back catalogue here?

A

So you don't to run around YouTube or twitch or all these things thanks more and I appreciate that and during the show, when you tap on this you'll be able to view it here, live as it's going, and also the the Twitter handles there and sometimes I forget to add people, but usually they're down in the show notes or right up right up here at the follow people. So the first thing I want to mention Visual Studio 2019 is out who's running 2019, raise your hands. Everyone I.

D

Think I'm, my 2020 I, don't know so.

A

Far into the future, yeah Maddie's is mad. Ela share one there you go permit not number two number one. Yesterday.

C

A

Yeah I've been running vs 2019, for since our first internal preview haven't even at 2017 installed for a really long time.

B

A

Impressive yeah I've been doing both Mac and PC. I just want to make sure everyone knows you can go get it. You can download it very exciting and tours to make sure you install Intel, coax I, don't think it ships with it and you have to install the extension live share, shape with it, but intellicus mind-blowing how the code, especially for like sam'l languages, is incredible. Oh yeah.

B

A

And if you miss out on anything, I actually did a 30 minute little intro to xamarin cross-platform. What's new in 2019 during the live stream on Tuesday, so you can head over to channel 9 it's right there on YouTube boom good to go. Some.

C

Other things I wanted to.

A

Talk about was that we have a huge community event upcoming called the xamarin developer summit, which is awesome and I. Believe three of the five of us will be. There raise your hand gonna, be there.

B

A

Is really cool? This is July 11th through the 12th I've been working with the organizers of it. So this is a community run event, but there's going to be tons of great zamarons there there's going to be tons of great community people. So it's two days it's in Houston. Everyone loves Houston in July, pretty sure, but don't worry we're inside of a hotel, and so the air condition is blasted on us at all times. I was close.

A

You can see some of the speakers so look at that beautiful set of people there and a lot more to be announced, which is super cool, David, Matthew.

B

A

Be key noting it so that'll be super cool and you can also learn about you know there / versity pledge code of conduct, scholarships that they have. So if you have some students or if you can't afford it, you can look into the scholarship programs, which are super cool and they're gonna be announcing a lot more and you can also submit a speech. So if you're, a community member, you want to to speak, you know submit it submit today, which is cool all their other. Things is going through like some of the blogs.

A

A lot of the stuff gets pulled from Planet xamarin, which, if you've never seen that a lot of our bloggers and the community have that it's a great place to find all sorts of great resources. Open-Source software shows and then you can actually see a list of all this big RSS feed of all the different blogs that are happening. You can also see the authors around the globe blogging about Sam Hren, we're actually looking to expand this to put in like live streams, its stand. Ups, everything like that so that'd be cool Martin asks.

A

Will you stream the live? The summit I'm not sure I got to figure that out I'm, not sure yet, and we do need an emoticon of David's hair. Let me make that happen. David yeah.

D

We need that so here's the thing with the hair: okay can I talk about my hair for a second yeah go far.

C

It's very I just want everyone to know that it's not filled with product I.

D

Don't know that we want to broadcast that, but so here's the thing it's the closest hairstyle to basically my bed head. So you just really never know, did I just roll out of bed or did I style it and it you know it works lazy's. Why it's my lifestyle? You do.

A

You it's okay, it's okay! To be yourself! That's what I like to say! It's! Okay! To be yourself! Just you! Do you yeah my hair yeah. It's also soft I had hair and then I didn't all of a sudden in people.

D

I wish I was shocked to see you on the livestream. Without the beard, I was like what happened, who.

A

Is that person? haha That's me, okay, cool! So some you have some awesome stuff, I just missed out a trendy over here. Did this really really cool blog was about showing tool, tips and more than just tool tips. Let me scroll down here, there's actually a whole bindable framework, so you can kind of specify everything looks so much code but yeah. He has it inside of some nougat packages and so there's some custom jurors.

A

But what this does at the end of the day as I scroll down scroll down, see that code see that code or so there's. This Amal is that you can do these little pop-ups over any element. So, like maybe you're doing you know tooltips as a getting started guide or you just need to pop up in some place boom like you can just get that going, which is super cool, so you got to get through. The custom renders and things like that. But then what you do is you add a fax.

A

So what I like here is that it's just a fax, so you're gonna attach it to anything, just kind of cool the powers there informs them. You.

D

Know what just one real quick comment here, because I've been kind of where Randy and his wife charleen? Are you know working out in the community working for customers and unable to share with people what you actually deliver for a lot of companies, because you're under NDA and things like that? I have behind the scenes, seen what they do and it's amazing. It's really wonderful work. So you know I've been in the position where I want to blog about the things that I'm doing, but I can't show the exact thing right.

D

So I have to kind of show something that's kind of like it. You know, but with minimal effort and so I don't know, I just I, just something aside he's like I gotta. Let people know that that's kind of that's something that exists and and these these two do really really nice work. Yeah.

A

That's how I was, in fact, if you actually read a lot of my original blogs on the xamarin blog from four or five years ago. It was a lot of similar things to what I was working on in my previous job. It's like I'd done all these things and now I'm talking about yeah well,.

D

We have the privilege of being behind the scenes being. You know inside the NDA's with a lot of these these folks, and so we get to see stuff so I mean you have to take me a little bit on faith here. I guess, but we see some really amazing things that we are. That gives us a lot of confidence and it inspires us yeah.

A

One really cool thing is Luis who's. We also haven't talked about they're doing this xamarin online latin wladim, fest, so latin america and they had a whole streaming schedule of it. It's all in Spanish, but it's all available on YouTube, which I thought was super cool, so that was on February 26. He did a whole topic on what is live-streaming, how to get streaming with live streaming like inside of your mobile applications like the plugins that they use and to just talk to all about it.

A

So I love, seeing like all this great type of stuff happen out there, so definitely give that a look too I love watching. So that's what people are doing now. No, this isn't community but I feel like Jonathan pepper was out there in the community and then.

C

A

Him in- and this is a great open source project that Jonathan peppers did because often like the internet and everybody every Android developer in the world, we have problems with images. It's just an Android thing. We hate images with a passion, so Jonathan ported glide, which Glide is an open source library that basically Google recommends for Android developers to do all the image caching downloading resizing. So he made glide acts which is a slimmed down version of it and I love this video cuz. He has like a hundred.

A

No, this is a thousand images or four hundred images of so many images in rows, just going going going and he just as the glide X package initializes it- and it goes from this, which is kind of lackluster image, scrolling down loading things which has been very improved in the xamarin form, just as an ecosystem. It's a very large image, it's non-virtualized in a scroll view, and then here he just simply installs the glide library into it.

A

He just initializes it boom and then it goes into super butter, scroll, download everything that you could possibly imagine, because it's handling all of the caching virtualization automatically in the underlying Android system. It's a super duper cool, a good friend code, male Matt, again another one out in the community of a blogging, all the time talks about win and how to use as your key suit key vault for your mobile apps I thought this was cool. Basically, you know how he got there.

A

As far as his hand, he looked his hand-drawn the stuff all the time, but yeah.

C

A

He talks about, like you, know, I, have all these keys. What do I do with them? Should I use as your key vault for certificate management and he kind of walks through how to put your secret data into as your key vault. Instead of just putting things in table storage and things like that, which is cool, so you can see he has like the storage credentials, a cloud storage store, he creates a cloud table, you can get the table reference and then query that directly from from the mobile app.

A

So he kind of walks through that, if you're looking to store some some credentials back over trendy because Randy was was blogging a storm and I had that book, because you know guys, everyone knows I, love cameras and images, and things like that right with my media plug-in, but Randy took it a step farther. He said: I'm gonna create this a multi image, picker or xamarin forms. So you can go in select a photo tap as many of them as you want and then return those natively into your applications.

A

So you can also pick videos too and get those into your apps, which is super cool, and then you get the native Pickers for both iOS and Android. So you're, not loading the images into your app but you're, just launching the native Pickers, so he walks through all the code of creating a media file. There's some some inspiration here from what we did in the media plug-in and hit, but using these other open-source libraries for iOS right so kind of wrapping the iOS nests of it up there.

A

We also have oh man. This is great Steven. Do you want to talk about this? One David from our good friend, Steven.

D

A

We go sorry. How do.

D

I meet myself yeah, so we were hanging out at the MVP summit and I guess he got inspired. I mean I, didn't inspire him, the guy's just you know brimming with inspiration so yeah. He has created this pancake view, probably one of the most interesting names ever and, and so he uses it to do all those rounded edges and nice shadows and border control, and things like that.

D

A lot of things that we're seeing come up as themes in our material visual challenge stuff, which we'll talk about in a few minutes, but yeah I mean look at this stuff. It's just it's what you expect to be able to create and he's showing you how to do it with with really minimal effort. It's just knowing good tips and patterns and techniques. Yeah.

A

That he goes through like using collection, vu and like some of the the new features and then like how to use transparency inside of it and like this is the actual layer of composition gain I wish I had that these skills.

A

D

Fantastic and yeah and the collection view people are using that quite a bit more as the features start to you know, fill out and it gets closer to a stable release. You can do so many things with it and everybody is just eager to see more of those features completed. Yeah.

A

He also talks about the font stuff too, which I'll be talking about to is using.

D

C

A

Instead of images everywhere, because we have new font image sources that you can use, it's just super rad. It's.

D

Amazing I love it I. You know and I want to embed some fonts in xamarin forums and just make them readily accessible. So if anybody has feelings and thoughts about that, you know we don't want to bloat anything by adding a bunch of once. But if there's like one good font, you know maybe the the fabric material design stuff that we ship from fabric or something similar I, think that would be very useful. I used it in my challenges and things that I did and I it's just awesome.

D

I don't want to go back to doing anything else. Yeah.

A

I would be super interest on that I. Remember back when I was doing like phone and like Windows 8, like all the built-in glyphs and I'm sure they're in uwp, too and I was just doing the WPF work and I pulled in my apps and then I pulled in the phone awesome and I was like I'm done done, done, writing I'm like, but, yes, the size thing is important.

A

I was just doing the Hanselman app, which and and I needed a blog about it, because I never used fonts before in apps, really like for my xamarin apps I, know, there's definitely places and times when you want to use them like for toolbars and tabs like you should use the native ones that you know, look and feel for the platform's. They are coming very similar, close together.

A

I was I've, managed want like a copy button or just want like a Twitter icon like that, can be the same because it's just the logo and those are fonts. So those are the we have Charlene's blog too. She kind of tugs, amber and essentials and talked about how to kind of more properly handle connection changes.

A

So we often document like the basis but Charlene she went above and beyond and talked about like hey, like here's, how you install xamarin essentials, here's the setup but like here's, how I would kind of create it in my base view model. So I can subscribe to notifications unsubscribe from notifications properly inside of here when it's deconstructed and then what's cool is she was like.

A

You know every time that you're on a page where, potentially you need some data, just abstract out this kind of connection view like it says it's its own little separate control and then, when you go offline just like boom, you don't have internet right.

A

So you're not like hard coding these in all the time, but you're able to easily simply have that in all of your pages, because everything will be using the base view model and that will trickle down and then she took it a little bit further and she said well what, if you put in little animation, you know use a lot e in there and and do something really nice. When there's no connectivity, hopefully you're not running into poles with your bicycle, but there's that so I.

C

A

Even little toast messages so kind of the different options that you have and how to use those things which I, which I liked in general, so like literally, have little notifications, little badges and even little yeah notification. Just say: hey, listen like they're offline right now, or something happened because you're on a different page right, maybe you're downloading in the background and and here's how you'd want to do it. So super cool David. You want to go through our PRS of the month.

D

Absolutely let me share my screen: alright cool, let.

A

Me get you over this.

B

So this just happened.

D

This just happened. This is, you know, we're talking about the community, and this is what our community does so there it is I gotta, say I, like it. I put the call outs to my wife she's in the other room and I wanted to see what she said. I, don't know, I, don't think we gonna have a response. Yet the jury's out on this I.

A

Do not know how I feel about that I'm, not okay, I.

C

D

Into it, man look back in seventh eighth grade. I was all about the stand by me: River Phoenix, you know buzz cut and all that jazz, so I don't know, but since we're picking on Morton here, real quick I did want to give a mention that you know xamarin for michelle is coming in for Dido and we're working on. You know whittling down the bug list and all the things that she'll you know really helps people to get quickly going provides a much easier way to do: flyout, navigation and tabs.

D

It also has a built in a URI based navigation mechanism, so we have some conversations that are going, but we need to get deeper with prism and mvvm cross and fresh and vvm, and anybody else that has a framework out there. That wants to speak with us. We will be having more of those conversations as we get closer and to make sure that they all work well with it. But one of the things that has has come up over the past week or two is that hey?

D

You know the uwp backend does not have shell support right now and what that really comes down to is that we're moving quickly and we're servicing the the vast majority of where we can deliver value first.

D

So it's a matter of prioritizing it's not that we don't want to do you WP or that we don't have hopes and aspirations to do you WP for the shell feature, but it's it's just you know again it's a prioritization thing, but hey this is open source right, so it is, and and and if you look at our you look at our release, notes and things like that.

D

You know, while I am here telling you we are focusing on iOS and Android, because that's the majority of our our customer needs and use cases and critical business applications. You'll see that there's Mac OS stuff in there there's UWB uwp, there's GDK, there's lots of Tizen, PRS and and and improvements happening in all of our releases. So it's not absent right, but we do need to to juggle some things.

D

You know if we had everything and we we are Microsoft, but you know there's still some constraints in this world gravity applies to everybody, so we would love to be able to do this so anyway. Long story, short Morton, said: hey. Is this something the community would could do, and is this something that you would accept? Would you be willing to take this if we were to work on this and the absolutely? The answer is absolutely yes. So he's done a little bit of work here, you can see on Twitter.

D

If you go followed up more you'll, see what he has done, just as a quick prototype he's experimenting and saying: what's it gonna look like what's gonna take, we have engaged with the same reforms, engineering team to say, hey, let's what do we need to do to lay this out for the community so that they know the scope and the spec and where they should go and how they should do this? You know it's not a go. Do this all on your own and then come back to us, it's a collaboration.

D

So if you are interested, if uwp is critical to your business near and dear to your heart, and you would like to invest in some way shape or form, why don't you reach out to Morton and, as things continue to develop and evolve you can you can kind of be involved in that and and see how we can get that done? I would love to see it happen. I know that we're also having conversations internally with different groups about what needs to happen there. What we could do to support that so.

A

D

And and on that on that point too, if you go to to Twitter because Twitter seems to be a very popular Twitter.

A

Com, that's where you want people to go right now,.

D

Paul DiPietro he's one of our program managers you can hit me I can put you in contact with Paul. Paul is currently queuing up and it has been having conversations with folks who are using xamarin forms and uwp and it's a critical part of their business, or they have plans to go there further. We just need to.

D

We want to better understand how you, how you're, using it and what you're doing with it and how we can support you there so feel free to schedule a 30-minute call with Paul so that we can kind of gather those stories and better understand what it is that you need, because your use cases for you to BP tend to be slightly askew and different than ios and android.

D

But we want to make sure that you can still share as much as you can and and that we understand what you're trying to do with it, because it's not how we think you should use it right. It's what are you really doing with it? We want to we're in a learning mode right, we're trying to understand and learn so anyway spent more time talking about that than I expected, but that's what you get when you wear a Microsoft Windows developer, sweatshirt drinking the kool-aid all right.

D

So let's talk about some of the PRS that are in here. What do we get here? We've got a platform specific for prefer the home indicator, Auto hidden from pewter and I'll, just stop at pewter because that's safer, and that might even be right. Oh so close all right. But if you look at this, what we're talking about is you got that little black bar here at the bottom? Sometimes you don't want that guy! You want that to go away and.

C

D

Specific to iOS right so when we have something that's very specific to one platform, then it makes sense to do a platform specific, and so let's see do we have some code down here. I didn't really look to see if there was a code snippet, but you can certainly go look at the commit and see what that looks like.

A

D

Didn't either until I started looking through the PRS I'm like well, that's pretty handy cuz I've certainly had use cases where I'm I want that thing to be gone yeah. So that's a nice one. Let's see inheriting from behavior I wanted to call attention to this, even though this is from our core engineering teams to fajn, and we typically want to feature you know what people in the community are doing. But one thing we hear from the community a lot is hey: I want to be able to do something.

D

So in this case, if we look over here at the issue that was open from omg HB, it's it's hey. I want to be able to extend a behavior and and use the bindable object as a top as a type and I can't because it's not public he's.

A

Right I, don't.

D

Know, man, this is plus plus what no.

E

A

A

D

I even set my resolution this time, okay, so so yeah, so you you, you know this was something that came in and we hear this often and and what we continue to ask from you as a community is when you run into a case like this. Let us know.

D

Yes, we have gone through the code and we've opened up a lot of things, unsealed a lot of things and made things public the past really two years since I started, because a lot of adding GDK and adding mac OS required us to do that from a back-end. Can't you know standpoint of being able to open up for those. But there's cases like this, where you you need us to go in and do something: that's maybe a one-off.

D

So that's what's happening here is that we went in and we made that public so yay or or made it protected. At least you can hear from it right it's not it's not protect private and sealed it's not hidden away in a corner, and you can't get to it.

D

So a couple of other PRS here from Chris King, also part of our team. So what these are, because there's no description right. This is very vague. You're, like.

C

D

Heck is this this one as well as this I just want to kind of give everybody a indication of what work we're doing towards performance that we're gonna start seeing the fruits of it, and but you may not see it yet. So what the profiler is. It's a whole new harness baked into xamarin forms that enables us to see exactly where all the time goes, and and so we can report that on a bill by build basis right and we can see, did we slow down in a particular area?

D

Are we making gains in a particular area and we're talking and we're talking, milliseconds, sometimes we're just like? Oh there's, 20 milliseconds over there, it's 5 milliseconds over there and that's kind of the world that we're in right now, we've kind of already swept through a lot of the big wins, and so now we're getting down to the nitty gritty stuff. So this is something that you could actually enable once this is merged in your own application and you could console out or I think we even pop it up in a screen.

D

At the end of the run, that will show you where all your time is going and and then this one is a fruit of the actual work team is chatting at me. I, don't know, am I supposed to read that I shouldn't read that right. What.

A

It's open, isn't it open it's! It's an open people request right.

D

I've no worries about talking about this stuff, but, while I'm talking about this, my team's chat or my teams.

A

One is Oh Matty right now, they're, like, though.

D

A

D

No I'm just wondering if they're like hey, you should talk about this. Hey.

A

Mom to tell you yeah so.

C

They're just making fun of your hair, they are.

A

D

It's a meme it just.

A

D

Didn't even you know whatever so I I love to be made fun of so go for it, because I really do think it looks pretty good. So this particular PR what's happening here is you know, we've looked at all the reflection and look up in the registration of things that happen at the beginning of xamarin forums, and this introduces a way in which you can control that very explicitly and see. If it wins you anything in terms of startup and performance.

D

So again, you need to go look at the files and see how the registration actually works.

D

Of course, if this thing is, you know baked into the product and when we merge this and everything you'll get documentation that will kind of demonstrate that to you, but just wanted to call attention to those things, because it is work that is happening but you're not quite seeing it out there yet and want to let you know that we hear you when you're saying that Android performance is, is a problem and- and we want to make all the improvements that we possibly can within the forum's codebase and then the Android team.

D

Also is working on these things, so let's see we have portable PDB, so James. Some of these are essentials things. So maybe you could talk to these things. Yeah.

A

Sure so I'll go through this one, really quick. So this good time uh performance caught me by surprise our good friend peppers, who we've talked about before through this PR out, which he had done four forms as well. Little did I know he is actively basically doing performance testing on all sorts of stuff, and he saw this little nugget change because we added xamarin essentials to the templates go scroll.

A

It back up there for me and what he saw was that there was this one call to convert pdb files which took 100 milliseconds to 0.1 of a second, not a big deal. Now, if you have a hundred nougat packages in your computing, a lot of them could be a lot of time. So what he realized in my code for xamarin essential time I took those, but the team's code is that we were using go to the change file there and you'll see it's literally like one line of this.

C

A

File changes boom. We were specifying PDB, only any change, it's a portable and because what happens is if you have the full PDB in it, Android has to do like a conversion, but if you use portable only which is totally fine, it works with sourcelink endorse of everything else, which you don't need all the other stuff. It doesn't have to do that, so it would cut off point one millisecond. So thank you peppers. You save this point.

A

One millisecond and now I need to go update every single library I've ever created because I've done it wrong. So so I wanted to call that out, because it's community we have tons of community members building.

A

You know all this great stuff, so that's great I love that stream elements is reminding us to talk to download Visual Studio 2099.

D

I saw that, but.

A

That's for it, since fritz is fault so and still running. Apparently what else do we got in there? We had a few great community pull requests. I really like this one coming in two essentials for for taking a screenshot Nicholas has done tons of great work and done lots of PR. A lot of his code is in here, so we're probably gonna be pulling that one in taking a look at it. We've now figured out media files and kinda how to abstract that so we're having him pull that together. So it was a cool PR.

A

So if you have feedback on that, I wanted to you'll get it from from everyone now, which I thought would be really nice, and there was another one. I'll share. My screen really quick before I go back to you. David is at this contacts. Api now I've worked with contacts forever and they're terrible.

A

But if you're a contacts, expert I love you to take a look at this one. This is a draft which is coming in from Pedro who's done a lot of PRS as well into xamarin essentials. To get contacts to query contacts back and forth, he totally has it working inside of here, which I think is cool. So you know permissions everything like that to go and choose contacts. So it's a little bit less of querying more of choosing, which I think is the correct way to go about it.

A

So if you have some some ideas on that, we'd love your feedback that one just not too long ago, but I think David yeah. Before we go into demos, you should talk about the visual challenge. Yeah.

D

Absolutely so this was um this was really amazing, so what happened was I was looking for ways to get more feedback on the visual feature and the material design components that come along with it and so I figured well. You know it's kind of a new thing. Let me set people up, I'll build the whole project, the hope I'll set up the project. So all you guys do is clone the repo. It's got the pre-baked nougats in there and and and I'll set a guided scenario.

D

Basically, the scenario is you: go, create a single page from an existing application, one of your own or somebody else's, and see how closely you can get the iOS and the Android to look the same, because that is one of the outcomes that we hear from the majority of people that we're speaking with. Is that that's a it's a key objective for them? They love the native aspect of zaman forms, but there are cases where they needed to look the same everywhere.

D

So that's part of the objective here, and so we ended up getting what 99 Forks, which, by the way, 51 pull requests. Actually, I think it's like 50, I merged one. So that means right that there's 49 of you who forked this and didn't submit a PR I'm just saying I'm coming for you.

A

Didn't get stickers if you remember it was last month stand-up that, specifically, we decided that we were gonna. Make this a full challenge. I made a blog post is because of you in the chat room that came in and I did this. So what was great that we gave away 18, xamarin, monkeys plus now I guess 49, because you did 149 sticker packs of xamarin and.net, so really excited to be giving those out. I was going to his post. I was like I love. The comment there by anonymous.

A

I, don't know that anonymous is, but it's pretty great. Well.

D

I I put anonymous because I'd asked him if I could share the quote before he actually gave me permission, but I believe his name was Nathaniel yeah, it's just it's a great one. You know, because Steven does some really wonderful things.

D

You showed off the blog post earlier in the show and I I literally had a drink in my mouth when I read that and almost almost wet my computer, so yeah, so some really beautiful stuff here, if you haven't looked at this, it's worth looking at all the PRS, because there's there's a there's, a huge volume of great tips and tricks that you'll see in here in terms of how to achieve different layouts. You know the rounded corners on things and whatnot.

D

You know just tons of really good stuff that you can go mine tips and tricks and and see how other people are coding and I did include on Twitter. If you go, follow me you'll, see that or you guess you don't have to follow me to see my twitter but go see the stats. So we did a post post challenge survey and to see what people are using, what IDs they were using, what they found to be successful.

D

You know, do they prefer zamel or c-sharp that sort of thing, so you might find some interesting things there and then, of course, we're learning some great things we had. You know, as I mentioned here over 250 individual notes of.

A

D

Us feedback: what.

A

Was the biggest takeaway hna I? Don't know how to pronounce her name had a few questions for me, which I'll answer I see it in there. What was the biggest takeaway that people got from the challenge.

D

The biggest takeaway I think, because you know they they were so appreciative of an opportunity to contribute. You know a lot of people, don't contribute directly to pull requests on the main xamarin forums or others and repositories.

D

But what you do really well day in and day out is quickly build beautiful, apps and so I think that that was one of the biggest takeaways that they felt appreciation for being able to contribute and to be part of something right and then the second thing was just a ton of optimism about how the whole platform is progressing and maturing and not slowing down, but really speeding up in terms of innovation, iteration and things like that.

D

So you know I I love to see that right, because, when I joined that wasn't the sentiment two years ago- and there was there was concern- and there was you know. Where is this going to go? We you know, as Dameron forums, I people used to ask me all the time is hammer dead is Microsoft, gonna, kill, Zaman what's happening and that's new at the time internally. I knew that was the farthest thing from the truth and I love now that we have something out here in the community. People are rallying around things like this.

D

That's that this is all based on your feedback. It's the one-on-one interviews, it's seeing what you're building and how you're building it and then that's what determines? What we're? What we're going to deliver to you? And it's very, very encouraging for me, because you know I like to be able to get up in the morning and know that I'm making a difference that we as a program management team, we as an engineering team or making a difference, Chris who's, going to show some demos here in just a little bit.

D

He even you know I was passing back some feedback to him and I believe Chris. You made the comment. You know it's great to have that encouragement to know that we're doing something that makes a difference. So please tell me when you have something positive. You know from the community, so yeah.

A

That's great I love, seeing immediately, you know, I went through each of the PRS. You can really see like well that what people win and what they did into each of them and what I loved about this is that you got to. You have to see a lot of like clones. You got to see unique applications, but also clones about like can I build this thing in xamarin forms. A lot of people are like. Oh can I build this with.

A

This can build with that and you get to see these great examples of beautiful applications that are that are out there. Cuz often, we have examples like tailwind traders and things that are very custom and inking.

C

A

The top and it's kind of nice just to say, hey, not gonna, jam on tons of back-end code ulla stuff, just want to work on the UI, which you know and see how I can do so. It's really cool yeah.

D

And then they didn't take very long to do it either I think on average for hours. You know I spent more on a couple of mine, but if you want to see all of these PRS- and you can of course clone each one of them and pull them down run them yourself, go up to David or now visual challenge and look at the polls, and that's it from me. James yeah.

A

I think that in general yeah it was really fun to see yeah I think who's seen also so thanks for that and then also he was asking about like abstractions and things like that, you stop sharing your screen. If you want yeah abstractions and things for Samer to send we're definitely listening. There, we've had a lot of conversations a lot of people over the time. There's some great community packs called Samer and essentials interfaces which we work with Ryan.

C

A

Davis does some awesome stuff to make sure that it's a seamless transition and access to it there we saw a lot more testing and things to do, but we're always around ELISA. That's my my main focuses p.m. now I did want to mention here. We have two demos, so first Chris because I know he's probably got to run back to development land and manage his team, but he wrote a blog post that was called introducing the xamarin iOS interpreter and is a little short about.

A

Is it kind of what you could do, but I didn't know what all you could do is I said: bring bring bring the man on himself so Chris. You want to take it away. Yeah.

E

Hey good morning, everybody good morning, so I'm really.

C

E

To talk about the interpreter, so this is a new foundational technology and it's a preview and it's out in preview. Some of the bits are baked into a stable and some of them will require a bill. That's linked off that blog post and it's cool, because there's something awesome things you can do now with it. You couldn't do and it also lets us build even more awesome things in the future. So to understand what the preview or what the interpreter is. You have to know two things and a lot of people who've been doing.

E

Ios developments know these things, which is to kind of cover on Apple devices. You can't do cogeneration, so you can't emit machine code and then execute it and since C sharp is often JIT compiled, so it's compiled just in time. You can't do that so to bring C sharp dial s, we use in ahead of time or a ot compiler. So when you hit build it generates, it goes from the C sharp to IL and then generates that il to machine code and that works for a vast majority of things.

E

But there's some use cases that it's you know difficult to make, or maybe it's a little painful. They give you an example. Under the hood system, got link expressions, that's hard to implement performant ly with doing a ot code and, like the c-sharp dynamic feature or in for another example, is assembly download. You can't do that and in a head of time kind of way.

E

So the interpreter is something that the runtime team has been working on with the iOS came on to get this and, as the name suggests, is opposed to ahead of time compiling it. We interpret the il, so you load up some assembly and we walk through the aisle and we interpret, as you can imagine, there's a little bit of a performance penalty, but it lets us unlock a lot of things that you couldn't do before hands things like dynamic or assembly loading. This.

A

E

Dahle, because.

A

Like it's, it's a machine code right at the end of the day, so it's like it's all I had as I'm compile. Basically as I mean it's just impossible. Yes,.

E

Like, for example, if when you have a dotnet assembly, all that is is its aisle instructions, you know, add and move and stuff and there's intermediate form, but we can't admit that and on an iOS device we can't turn that into arm 64 assembly to actually run so we were doing ahead of time, compilation and that's the most performance, but there's some use cases where you want to be able to load an assembly or a MIT code, and the interpreter will let you handle those use cases.

E

So I have a demo that will kind of explain a couple of the examples. Let me share my screen here and this one. Can you guys see that yep.

A

E

A

E

Awesome so I've got it's a little example. It was linked on the blog post and, if I hit run, it will deploy to device.

E

So it's just got four buttons and you press them and it and if I press them, it will say, for example, add some numbers, but the important thing is what actually is happening under the hood, so when I, for example, hit the emit button, we're actually going through and using system reflection not emit to were emitting specific instructions for like code generation.

E

So in this case you know, you load two numbers and you add them and you return them and that's what actually is making three plus four equals seven and then there's another example, which is the download one here and what that does it's actually going out to the internet and downloading a dotnet, it's assembly and loading that up and running that using dynamic.

E

So these are things that without the interpreter you could not. You could do them on on the simulator, but you could not do them on device. It's just. That was a restriction based upon apples. You can't emit code and ex-students.

E

So if people want to try this out, you can pass the interpreter. You go to your additional and touch arguments. You can pass gasps interpreter and that will work. Let me stop sharing my screen also.

A

Before you leave in that dialogue, some people may not know what M arguments even are I mean I, never.

C

A

To go in there right like this is like I: don't want to go out defaults. You know, there's so many buttons. Look at all those.

E

Checkboxes explain a little bit about what's what M touches. So, as you know, when you hit build, you have a c-sharp, you know c-sharp source files and those get compiled down to a dotnet executable, and we need to do extra work to take that and move it all the way to iOS so M touch is part of our build process and it bundles up all of those dotnet items and we'll ahead of time, compile them and copy all the debug symbols, and it creates a an actual app bundle that you can.

E

We can then push over to the phone and M touch arguments. Is we have all of these lovers like, for example, do you want to turn on LLVM because you want really optimized release, builds or various things here, like we have a concurrent garbage collector, that is in preview.

E

So some of these we have options for, but this is kind of a generic if we didn't make a button, but you need to pass something to it so interpreter we don't have a drop-down for yet because it's it's an experimental feature, it's not in final yet, but it's a easy way of passing those things to say. Yes, I want to turn that, on god,.

A

E

Makes sense that makes.

A

Sense now in inside of here, there's there's the äôt part and then the ll impart and those are two different things correct. Yes,.

E

So the way that works is when you build we're, taking all your C, sharp or turning into IL, and then the mono äôt compiler will generate machine code is optimized as we can to make it go fast. On the specific processors. Llvm is an extra step. We can turn on a that, produces you know better code, but is a significantly slower build. So when you do, if you notice what you're in debug, we don't even make it an option because it doesn't make sense, yeah.

C

E

You're kicking out that final build, you don't mind if the bill takes an extra 30, you know 10 seconds or something because you want that. Squeeze that extra couple percent out gotcha.

A

And there's some chat basically yeah between Frank and you saying it was just asking about like App, Store, stuff and Frank was in twitch kind of saying, like you know, you, the interpreters here, to enable you to get some of these experiences on the device, but everything here, you're still abiding by the licenses Apple, had because all the code that you have is testable at app review time. So you're not like trying to get around that stuff at all.

A

You know it's just these are opening the experiences that a lot of libraries use like energy framework uses Amit, and things like that. So you're, just gonna enable those libraries to to do this type of stuff yeah.

E

This is this is something that um there's other interpreted languages that they interpret everything well we're just saying you can turn on and interpret. Maybe just this one assembly and we'll Mayo tea everything else, yeah, there's a number of options. You can pass to the interpreter flag, they say hey, you know, 95 percent of my app I want that to be a OT, but maybe this five percent I need to use dynamic or I need to use assembly mode for good reason.

E

So it's just letting us crack open, just a small percentage where it makes sense to the interpreter, because there is a performance, it's not nearly as much as we expected, but it's there. So that's kind of why you have to opt into it very cool.

E

Does anyone have any questions.

A

See if there's anything in the chat that was basically the biggest one in the chat.

E

Just one other thing to explain the blog post talks about this, but so interpreter will work today. If you go to the stable channel, that will work, and that will let you do things like assembly load and such but there's some things like. If you want to use system reflection amid or if you want to use the new system that link expression that uses interpreter on the door, you have to use the preview bill because there's some extra changes we had to make to the runtime that aren't ready for primetime.

E

Yet so that's some of it is ready for previewing now, and some of them requires a special build nice.

A

Yeah, a lot of people in the chat you I'm, gonna, say fuel, that's what I'm gonna go with is that interpreters are back in style. You know blazer using interpreted. I am like these devices are really fast. You can interpret code really fast, yeah.

E

The advantage, I think is that we kind of get the best of both worlds here, because 95% percent of your app, you may not need to interpret because- and you can get that extra 5 10 15 % performance boost or whatever it is. I I, don't know off the top my head, but you can just turn it on for the things that make sense.

A

Someone asks are: is this the same interpreter as the blazer interpret or is a different interpretive specific for iOS, like the court has their core technologies that are shared there? I.

E

Am uncertain it's the interpreter for mono, so the mono run to a mono team added. This interpreter I'm, not sure if blazer uses that was.

A

The one they use yeah so.

E

This was we're building on that and they just said to be some I of a specific tweaks that we done recently to turn that on that.

A

Make sense, ooh, Frank, Frank friend of the show Frank Kruger Frank, who was gracious enough to pre-record a bunch of podcast with me this week he says that yes, Oh Sam interpreter same äôt. However, blazer doesn't support mix mode you so like we have mixed mode of äôt, interviewer kind of all that stuff right, I'm.

D

Expecting Daniel Roth to come busting in through the door since.

B

The original blazer he's probably running between.

D

Buildings right now.

D

C

Are you talking about today, blazer.

A

Of course, you did so I love that blazer cool.

E

Franken Chad I, know Frank from Twitter and he's awesome does amazing things and it's pretty cool. There's a number of different community experiments already with you, the interpreter. So if you guys have any feedback, please drop by the xamarin Mac iOS get her or open issues on github.

A

Thank you so much thanks cool thanks everybody. If you got a run, that's fine I'll feel free to stick around I know Maddie's been waiting patiently in the wing. Okay,.

A

So I was able to kind of demo a little bit of some of the new stuff that we're doing with developer productivity, but you have some brand new demos for us Mandy correct, oh I,.

C

ah The previewer, my my favorite and least favorite thing in salmon forms such I'm sure is the same with a lot of people. If you've installed Visual Studio 2019 and opened the previewer I hope it is giving you less errors. We have been putting so much effort into it over the past six to eight ish months and it's gotten a lot better David. Who is one of our our biggest your muted?

C

By the way, our biggest critics of the previewer actually said a compliment about it a couple of weeks ago, and everyone on the team was so excited. So it was great and I.

A

Also saw some great tweets come in people and installed it. They were like opening their app and like it totally worked there, which is which is really, which is really great. Yes,.

D

A

D

It's not it's, not fake people. Ask us sometimes and I get asked us a lot when I demo, even for the past, you know year plus they're, like are you using the same preview or were you because it seems to work for you and I haven't had that experience somebody I think on on? Maybe it was Twitter I said: hey. Are you shopped because that's not my experience, yeah, and so we are seeing some good feedback come in through the via you know, 2019 release with the new improvements.

D

There is more to come and I'm sure that Maddie you're going to talk about that I. Don't want to steal your thunder, but.

B

D

Want to say that it's not you know we are seeing the improvements, we're measuring the improvements so that we know exactly you know what we're doing to improve or you know is it making a real difference, but the other thing I did want to mention just real quickly is that in the visual challenge the previewer was used actually quite often, and many people said not just used it but said this was instrumental in helping me save dev cycles. So there you go.

C

Yeah, so we know it took a long time I'm. Looking at the chat right now. We know it took a long time and it still has a long way to go so before I get into the to two new features. I'm gonna talk about very exciting and I'll. Try and move quickly. um I continued tweeting at me continue emailing me filing bugs tweeting at David and then letting David tweet at me.

C

Whatever it is anything cuz, the more real apps we can test with and get errors from with your logs and even without your logs. It's still helpful just to know the frequency of errors. People are running into that's how we know it wants to go fix first, so the more you complain about it and the more you get up all in my Twitter mentions the quicker we can fix them.

A

C

Yes, we love the positive feedback, all the positive notes get shared in in our slack and everyone gets really happy. So it's very motivating. So, let's talk about some of the cool stuff that James showed on Tuesday feels like a year ago, the visual studio launch party. It was great and yeah. Alright, let me share my screen um so before we start, this is not Photoshop and it's not fake, I swear I'm actually doing this live. I do have a video backup, but we're doing it live it's gonna be awesome.

C

This is a new xamarin forms. Tabbed app I changed two things so far. One I went in and I added these three lines of zamel to the three sample pages I'm going to show you today and what these are doing is they're, enabling design time data in line for the pre viewer and for your zamel files. So what does that mean? Basically right now what you're seeing is a bunch of static stuff? Anything that is bound to something?

C

So if you look into a page like what's item detail page here like this should say what the item name is right, but it doesn't show you anything because we're not running your code, we're not actually running the app live, so you don't see anything and it makes it really hard to design your you eyes, because you have no idea what its gonna look like so and the chat is blowing up. So please James, David.

A

We're monitoring, yeah.

C

Sure, that's good I think that's good. So what you can do is with anything that you have that's a xamarin forms control attribute. You can go ahead and you can write D : your text right here and change what it says. So you see immediately this changes from app name to my app just.

A

C

That right in line um another thing you can do is you can change like colors? So say you don't know where the stack layout is and you're in your layout and we don't have those little gridlines for you, Oh get rid of that. You can go D : background color equals. Let's make it red and it'll. Show you where that stack way out is: oh.

A

So you can see it's actually not filling it up completely right.

C

So you can see where you're screwing things up, which is very nice, and when you run it, this stuff goes away completely. So you don't have to worry about people seeing this horrible layout right here. um So let's talk about more of this data binding stuff. So you can see here this is bound to item dot text right, but this is just a new app I. Don't actually want to continue building this app I'm gonna build a monkey monkey Facebook like you something.

C

Examined so I'm I don't actually have a view model for my monkey setup yet, but let's say that I know that I want this to be like monkey name or something right, close that what the preview take a second. So it's not going to show me anything, um but I can go in and say then text is actually gonna, be monkey name.

C

Easy I also works with images. So if I want to find this to, like my monkeys, profile pic monkeys definitely know how to do that. um It's not gonna show anything, but I can do first and I added this beforehand, because I didn't want you to have to watch me a drag and drop, but just add it to your Android resources.

C

Monkey monkey, it's a cute picture to add to your Android resources, drawable and your iOS resources just drag and drop it in this little cute monkey and you can use it anywhere in your zamel files as a design. Time picture to look at it's awesome. So go to the list view because I know this one is that the one I struggle with the most personally.

A

C

And it's really useless, especially if you're trying to customize the stuff down here like this, you saw so there's some some witchcraft that happens here basically right now. This is this item source, for this is bound to items which is wired up through your data store and all that stuff, but I don't have that set up yet and I just kind of want to make my own. For now, so I can do D, : list view items source close that tag split it up and I.

C

Never remember the syntax for this, so I'm gonna pop into our beautiful documentation.

A

C

This aka dot, ms / xamarin, forms previewer I'm, going to copy this little snippet right here, drop that guy right, their people.

A

Are also loving the nudie tag by the way, a lot of hype or D :, we're very happy that was I was a if he call on our end, but it seems like our customer validation. It did well yeah.

C

So then, so a sidebar, the D, is actually based off of two things. Obviously, what we do on the WPF and you WP end with like design heightened with, but also putting it in line, is what Android does what their tools namespace. So, if you're an Android native dev and you work in X and all the time they do this, so we totally begged, borrowed and stole this idea from them and it's awesome. It works really. Well, yes,.

A

On top right, you have the xmlns nice pace of d and the MC ignore alike. That's all the same basic right and.

C

It will be coming in by default in the templates very soon, so you won't have to go to the docs and copy it, which is great, so yeah.

A

Why doesn't that work with WPI so.

B

A

Stop there, and so we we were thinking about the design time, data of it and there's a lot of there's like the advanced scenarios at WPF and UWPD, and we're thinking about the most simplified really easy way of doing it. So then we could grow casually up to that and I think what what our teams are working on is. How can we synchronize with.

B

So we have some of the more advanced stuff for WPF, but we don't have this easy stuff, which can be incredibly useful like the easy stuff, yeah yeah really sorry.

A

I'm adding I'm sorry, that's.

C

Okay, um so what I did here was I made an array I made it of strings James. Actually his demo used a model of Scott hands, mints podcasts that he has from this Hanselman app. So you can do this with anything. This doesn't have to be a string, but for the sake of making this easy to follow and I just made three strings, which means, if I go in right here and say that this label is just gonna, show I'm gonna bind it to this design-time itemssource. Oh, why did I screw up?

C

I put my clothes on the rock side hold up binding.

A

Contacts I think it changed it to that of mine. Oh.

C

Yep nice, it's hard finding dot there we go, give it a sec. I screwed us up. I, put this in right, place and I put this in the wrong place hold on dumb check-in.

C

Now it should be good, let me give it a sec. Let's, let's flip our platforms, give it a minute. I might be working it too hard, but I can also pull up the video. What this will do is give you three different monkeys in this list, and you know what I'm gonna do. Oh there we go I.

D

Was doing this last night, it absolutely worked. Yeah.

C

Just take it it's taking time, I, don't know what I'm actually file a bug right now. I'll show you all how to do this on ps4 Mac hold on. All you have to do is go to help report a problem. If you.

A

Type, if you type in D : text and give it a hard-coded string, does that show up anything pick a question find out and.

C

Then break them on that.

A

C

Your report, a bug, hey I'm, all about reporting bugs anytime I- can alright. Let me give you the video real, quick, cuz. I just did this ten minutes ago, so it worked. Yeah.

A

D

To move that out of the way gotta.

A

Cancel that win it.

C

D

C

Can still see this right now.

A

C

Let's go back, let's go back record it here we go. This is the beauty.

D

Yeah, this was super.

C

Like everybody else, yeah.

D

Yeah, we spent a lot of time reporting bugs I'm, not even kidding you yeah. One of our team members was on site with a customer and was saying hey I'm, having trouble with this flex, layout, bindable, layout, etc, etc, and I was like well. Let me just pull up a different project that I knew was similar to what he was doing and I used all this design time data just like you're, showing right here, yeah and I, was able to, unfortunately not reproduce.

C

That's right we're getting there so now, I'm, just lovely demo me is showing you all the cool things I'm doing and here's magic Oh caps-lock.

C

um While this is happening that should work in just a sec dot and save it see there eautiful want you to me. um Yes, so while this happening I see a lot of the word blend and chat, let me just talk about this. Real quick um blend is awesome. We know yes, someone said blend is very complicated and salmon farms very complicated.

C

So let me know what you love about blend, because what we're trying to do is bring features in one at a time and I'll pause this real, quick as bring features in one at a time, because we're not gonna just ship ship a whole feature at a giant time and let it break everything we want to do it incrementally we want to be smart about it. So let us know um definitely tweet me email me all that stuff and we'll figure it out so cool. Let me try and reopen Visual Studio and see what happens.

C

A

um One was while you're doing that someone was asking about custom controls and how those work Oh with every viewer. Second,.

C

Half of this, oh.

A

I didn't even know, I didn't know, you're demoing, so I know.

C

A

C

A

D

More one more thing, but when I got, if.

A

Someone was saying, like um often there's a lot of runtime tools like live zamel and a few other ones, and when to use them and I. Think for me what I think is interesting about the previewer is like you, don't even have to have the page as part of your app yet right, like you're, sometimes file/new, adding it in there is useful, but sometimes you just want to see a quick, quick preview of it is the.

C

A

The preview er there it is look.

C

At that beauty, beauty, yeah I've also had Visual Studio open for like three hours. So that's probably part of the rest. Yeah.

A

C

A

C

Is like wait, stop the.

A

One thing that we did in the the preview is that it doesn't run your code by default, so I won't even try to render your custom controls by default. It'll look for base controls, because custom controls are doing a lot under the hood and invoking native things and and just kind of overboard, so you have to opt into it. I think you know that where before I would try to do everything right and this.

C

A

Running your behind, so we ignore your code behind my default. Is that correct, Maddie, correct.

C

Yes, so I, that is a great segue into what I want to talk about next, which is have some controls in the previewer. So custom controls, you guys, you folks all make amazing custom controls and there are some you pull in from like control vendors. There are some you make yourself and you share on your blogs, but you don't uh and they're all awesome and a lot of times, they're very complicated and I'll, even more they're, very data heavy, so that actually makes it very hard for us to render them properly.

C

So what we've done is we've given you this class right here, and so what this class is saying is that I have sanity, checked this custom control and it will not completely work the previewer, and if you set this to false, the previewer is not going to try and show it zoom.

A

In on this, for us, oh yes,.

C

Yes, yes, yes,.

A

C

It's not it's straight from system component model, so very standard.

A

C

And so what I can do now is I can pull in James's circle image nuga package, which I've already done and I can go back to my little monkey profile page, which did not save my image hold on image, D : source cute monkey that, oh, it didn't in my quotes in.

A

Design time visible works with any custom control, so, even though skia sharp would need to opt into these things, yep.

C

Yep yep, okay, so what I can do? I have already pulled it into the the namespace here, which is from his lovely github repo readme Oh circle image and it works I have to file it. Obviously, so it's not oval, but it works right out of the box, because James had put that that namespace onto his class put that attribute onto his class also it works before a build because it's all based on xamarin forms stuff.

C

So some controls the skier sharp ones like Jim mentioned they work in iOS now, which is great, but you have to build it to show it so you'll see that way enough. After what you can also do is change things in your constructor, like in the constructor of your page. So I can add, like let's say, I put a name on this image and I call it monkey pic.

C

First of all, the new c-sharp editor in Visual Studio for Mac is amazing. If you haven't tried it yet, but I can make this class design time visible.

C

Fantastic, uh the lovely new intellisense is gonna pop up and tell me to pull in system component model. Whoo and I can go and set like the monkey pick border color I cannot type I'm. So sorry, it's my lunch time. You'll have to give me a break dad order. Customer.

A

Lunch time yeah yeah I, know.

C

And I've been watching people eat through the window.

C

Terrible and let's call.

D

On your name, you're.

C

Not even kidding, actually we had that yesterday too, and if I build this project, it is going to very nicely show me the border on the preview yeah.

A

So so lucky we're asking you know: Frank was asking like the owner has to do it, I mean when what we, what we didn't we surveyed and talked to a lot of our developers, is they want to use the preview as like a quick, you know not as a one-to-one representation, but a quick sort of overview like are the controls laid down or things looking pretty accurate? That's where they use a lot of design time things, because there's so many different devices and I.

A

We knew do now have like a device selector right inside of it. So you can see some different scales, but you know we want to make it super duper stable as as stable as we can, and you know to get all the base controls working. It will default back. So if I didn't add that attribute like it would she'll still show the base controller she'll still show a square image right. So it looks at the base image for the control type, so I'm, all back in that regard, yeah.

C

So this is loading back up. My computer sounds like a spaceship, um so I'll give it a minute. Someone pointed out this morning, but I think David did that this control, a a loading indicator, is backwards. Our dev team is in Australia, so they think that's totally normal. It's.

D

Bits absolutely it's rewinding your your changes as it loads anyway,.

C

So you can see that the border popped up and because I'm using this beautiful design time monkey I can see how bad I screwed this layout up and I can go in and fix it um very quickly and so yeah I saw in the chat on YouTube that the pre viewer window says the preview. Er doesn't do really advanced, layouts you're, totally right. It struggles with them sometimes and and David's response was 100 percent correct. It should and we want it to and we were trying to get it there so like he said.

C

If you have a case that doesn't render just do exactly what I did um you can attach your logs? It's super easy. We do look through every single one of them and if you haven't heard back on it it either we haven't gotten to it yet or we're talking about it. So send me an email and I'll. Tell you exactly what happened see.

A

Vomit bug you found my book that Alex Blount yelled at me about so, if you set yours in real time, your horizontal orientation or horizontal options to Center yep I.

C

Have to do the aspect to rate it stopped.

D

Updating, oh yeah,.

C

Right, complex.

D

C

D

It just it's mad at me right so the situation here is that it's a measuring issue right frames.

C

D

Inside of a stack layout, so forms is going to try to give you all the space that you want by default, as opposed to you letting that control size itself and so by setting horizontal options to Center or start for that matter. I believe it's going to size itself to its own content and.

A

You can someone has asked me works with Android, that's Android right there. This.

C

A

C

We also yeah and the default.

A

To be light theme so right.

A

C

So the other cool thing is, you can use the design time the D name space with like on platform and on idiom. So if you want to switch between things in the preview er, you can say like only show me this red border on iOS or something if that's something that will help you I, think you're, trying to see what things are. Gonna look like and change things around for a platform which is super cool, so anything you can do in forms. Basically, any controller attribute you can set.

C

You can set with the D : namespace, so great, alright, I'm gonna stop sharing my screen. Any questions on this I know we're running low on time. Yeah.

A

I know you see: Anna was asking me about the live player which we don't need to know, so they stopped talking about. I was the PM of that project and it's a great project. There's a lot of learning. So you know it was a do a lot of things. There's a lot of unfortunate limitations with it.

A

Just couldn't be overcome with it and just how we ship and people build applications, and, additionally, just a lot of App Store shenanigans that I can't really get into legality wise, but just there's a lot of weird kind of things and apps or policy changes and permissions and all sorts of things. But you know it's no longer available in a store, no one. Nor did we bring it over to 2019, because it's not a it's, not an experience. That is really a will, be a delight err or it can be really maintained long term.

A

So that's what that's there, but we are obviously on the whole team is really focused on developer productivity when it comes to only zamel intellisense. But you know the previewer and other things that we'll be working on as the year goes on right.

C

And anything that you miss those features that and you're gonna hear me say: that's a zillion times over. Every community stands up for the rest of time. Like tell us exactly what you use that you love, because we try to work very agile and visual studio ships all the time, and if we can sneak one little thing into the next release and just get one thing: that's gonna make your life a little bit easier.

C

You need to know what those are so tell us, but.

D

We don't actually sneak right.

C

Sorry we, uh what nice politely put in there.

A

C

Following the rules, we.

D

Follow all the rules, man.

C

I may have filed some features as bugs before it helps.

A

Awesome demos I think, even though fyssas is gone thanks Manny for the awesome demos as well, and thanks everyone for tuning in yeah, Daniel, I, look forward.

C

To watching your very first, the.

A

Desktop Donny.

C

Later this month, thanks for hosting me today, selected.

A

And I learn the ropes. Absolutely now remember every single Tuesday just about as asp.net community stand-ups on Thursdays we have xamarin dotnet community stand up, we have languages and runtime coming up next week, a tooling with Visual Studio at Rosslyn and then at the end of the month. This man right here will be back for desktop WinForms wwp, probably some guests and some demos, IIST and I will try to bring some interesting.

B

Guests, if you want to see something or someone, let me know yes, try.

A

To make that happen, and at the end here on the thank you screen on the bottom, there will be links to a survey which isn't a survey of how you thought the show wins, which is what do you want to see on the shows for any of the shows you can write us in and we take a look at this Thanks Madi David for for joining us. I appreciate it thanks.

C

Everyone for home, subscribe.

A

On the youtubes on the Twitch on the Facebook's, wherever you're at you'll get notified whenever we go live thanks, everyone for tuning in and we'll see you later.