.Net Foundation Xamarin Community Standups, 5 Mar 2020

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From YouTube: Xamarin: .NET Community Standup - March 5th 2020 - Dual Screen Fun with Shane!

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

Links: https://www.theurlist.com/xamarin-standup-mar2020

Suggest an idea for a standup: http://aka.ms/dotnet-standup-suggestion.

A

We did that we're back and in the office I mean the.

B

Sign said: don't come in, but.

A

I refused it's happening, all the signs were like go home and I was like no I refuse. So take.

C

All the gear back to your home office and then we can broadcast from there. That's.

A

True yeah I did I did think about just doing it, but it's not the same vibe and atmosphere and I would have had to set up too much in OBS to make it happen. Welcome back everyone to another xamarin community stand up on James Munson magno I have my amazing friends in the entire world. Maddy David and Shane especially got Shane back back.

A

How's everyone doing good.

C

D

C

Feeling a little left out, though, I feel like a black sheep here, because I'm wearing a visual studio, t-shirt, which.

A

C

Everybody else has God's amagai's yep.

A

C

At the signs everywhere, yep.

A

Slacker xamarin don't mean any sand. I'm, not the visual studio community stand up, you missed out. I did.

B

Have a long internal debate this morning, whether I should do this one or the vs 2015 shirt so but I remember this one blue.

D

Looks good on the camera I think it's a good pop yeah.

B

I figured I should go with modern that one's pretty faded, yeah.

A

I think I just got this from the stash from we had a xamarin stash that good that came imported from Boston or San Francisco and I was like. Oh I need a fresh one, so still good another on the.net Foundation store, you can just buy one, you just you know, get them get the monkeys.

D

A

The colors to sell all sorts of colors I'm.

D

Adding that to the URL list, oh yeah,.

A

There you go dinette Foundation stores, how is Google it just put that in the red one is not there. The red ones were a limited edition. When do we do the red ones I feel like it was a build? Maybe or was it a? Maybe it was an evolve or something, but that they were made only for employees originally I think nobody knows, and no one cares. No.

C

No, don't know limited.

A

Edition anyways welcome back everyone sit down, a community stand up. We do this twice, usually we've been off and on the last 20 20, but we do asp.net on Tuesdays and then we got xamarin first first Thursday of the month, runtime languages desktop a bunch of other great stuff, all sorts of good stuff. There, man, you just sent out the links for all the great things we'll be covering. Is this your first time in a community stand up well welcome?

A

We do this like I, said Tuesdays and Thursdays on Twitch, mixer youtubes, and for this one we stream also to the xamarin youtubes, samer and youtube.com slash xamarin developers make sure you smash that subscribe button. If you're there right now, always, though you can find it live, dotnet live dot, do t dot net. There's lots of dots in there. It's always there. You can find all the past shows there.

A

You can filter them and you can find the community links all the things we talk about great things that community is doing, and then we have special guests and our guest today, Shane is on because Shane basically wrote the entire dual screen. Support. I, don't know that's an accurate statement, but I'm just gonna say it is know who else? Who else was? Who else? Who, on the team, all ditto contributors, a bunch of people right, yeah,.

B

I mean there was a lot, so John did kind of spearheaded the the initial bits to get all the bindings working between the Android libraries. So he kind of got the first spike proof of concept and then yeah, and then we just kind of took that and developed it into the foreigns libraries and then Xavier did a lot of really good work with tying in things like our some state triggers and things like that.

B

To make a lot of the units so stuff, some stuff you'll see later to see those interactions, yeah and then him and David did a really good job. Just super testing and getting the our xamarin TV demo put together, which you'll see so, and then that was just a really good case use case for us to just kind of make sure it worked well on all the devices and then Madi Linda does her voice.

C

Laughter, we did, we did spend a lot of time learning from the xamarin 101 videos that were in there, and you know it's great to to have the team itself working on a sample app like that. You know it's representative of a real app that I've had to build for clients before, and it also gives everybody that hands-on experience, building, apps I, it's one things: I love about the same reforms team in particular. Is they have a lot of hands-on experience, building apps in general, they have their own apps.

C

They build apps for first showcase stuff. Like this. You know it lends a lot of experience and it gives me an excuse to get PRS merged. That I really really want, like the media element, which we'll talk about a little bit later, yeah.

A

It was exciting because I've been building out like the Hanselman app for like the last ever and I have a bunch of video stuff and I was like. Oh, this looks so much better than mine. I'm, just gonna steal a bunch of the code. Do it looks.

B

A

All right: well, let's get into it, though, before we get into dual screen: neo do fun with Shane, let's hop over to the Community Links with Maddy Maddy. What's.

C

A

The baby, otter, baby, goat, so cute baby.

D

Auto knit crochet baby yoda we'll be taking you through your links. Oh my goodness,.

A

Van Etsy purchase.

D

It was a Valentine's Day, Etsy impulse, buy gifts and so I see.

C

Squeaky ordering it right now, yeah.

D

All right, so let me make sure this is the right screen. You can see my links and stuff. Yes,.

A

Happening one great okay,.

D

I went um way overboard with links. I'm really indecisive I had a really hard time picking this month, so we're gonna move pretty quickly because there are some really good, pr's and I want to make sure. Shane has plenty of time to chat with you all about stuff, but all the links from inevitably when you want to go, read all of them in depth and spend the next two weeks just reading all these links right here, I put it in the chat, but in general xamarin stand up mar 20.

D

2014 9 teen, no 2020. Of course, we've got the usual dotnet and xamarin events in March Jamie does an amazing job every single month of compiling all of these things there they're all international or some in the US. There are some all over just check it out for sure um you know we even have our first viewing party for something that you all should be very excited about. Boom net con focus on xamarin save the date March 23rd we are gonna, be doing it fully remotely we're all gonna be in different homes.

D

James might be joining us from channel 9, hopefully, but we've got a stacked agenda with, hopefully some names you're familiar with both on the team and also in the community. So some people whose blog posts we'll be talking about today, are doing talks and it's a whole bunch of different stuff. It's not just like zamarons cool, then we've got some cool deep dives I mean xamarin is cool, but beautiful apps with stephen. I have already blocked this off on my calendar.

D

Shane, I think, is doing less. Shane is taking you through shell. So if you love what you see today from shane, he will be shelling it up in just a couple weeks and I believe James is going to be running the tweet board all day, so we will be interacting with you all. It's gonna be awesome. We also have kind of a bunch of like highlight videos, I'll be showing of some cool things going on in the community. I, don't wanna spoil too much, but it's very exciting. Yeah.

A

I know: okay, man sharing them all to all the the team members like random electric out this video check out this video check out this video yeah.

D

A

Super cool and also I'll mention that a lot of those speakers I've been in the community for a long time, but many of them actually first talk ever I'm really excited to get a lot of these individuals that I've I've I've read their blogs and I've watched their you know, use their libraries and I thought it was like hey how about. If you gave a talk, it kind of talks show off all this stuff of all the libraries that I've been using forever and people signed up so I'm very excited about it.

A

So some returning faces, but some brand-new faces, I'm really excited for this lineup of people and also Matt. You don't forget, we have this all-star keynote all things Ameren with.

D

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And Amanda silver boom. Yes,.

D

Which is gonna be very exciting and David and I are gonna, be showing off a whole bunch of stuff, but Amanda's kick off the day and kind of you know not only tell us how much and how I should accept my cookies. How amazing xamarin is, but also how amazing everything that's happening in the dotnet and Visual Studio worlds is as well so gonna be a lot of fun, so I know you're all dying to watch this immediately subscribe to the stammering.

D

Developers YouTube save this thing in the way that you can save the live thing, so it tells you that you're waiting for it and it'll tell you when it starts and, of course, James will work as magic and the whole team. That's going to UM you know: do all the behind the scenes stuff go, get the videos uploaded after. If the time zones are weird but we'll be interacting with you as much as we can throughout the day as well.

D

Alright, two more things when we get into community one zerrin forms four or five: there are exactly five things to be excited about now: I'm, just gonna earn more than five, but David did a great job. Zimmern TV solana, apparently um David, did a great job summarizing them. This font is a little bit too big. I.

A

Love it big fine.

D

Big fonts, so lots of cool stuff, including some of the great feature previews that we have, including triggers, which Shane will talk a little bit but a little bit about the rest of the stuff. That's going on so take a look if you're not on xamarin forms for 5. Yet it is an awesome release. I have been playing around with it for a little bit and I am very excited.

D

One thing that Dave David mentioned in that that James also wrote a blog post about is Android X support with xamarin forums, xamarin essentials, official stable new get whatever else, and if you don't know what Android X is it's just kind of the next generation for Android support libraries, it's a little bit and it's a I, don't know it depends on who you ask, but I would say it's a little bit more like smaller and like easier to update like they're, less I, don't know.

D

Sometimes you update one Android support library and everything breaks this one's a little bit more manageable.

D

So James was talking about kind of the plans for it with salmon forums and xamarin essentials so and also how you can use it. Additionally, if you are a library creator which I know many of you are and some advice on how to upgrade your libraries to use Android X using xamarin essentials as the example for that, so for sure check it out.

D

Yes, no more issues with mismatched nougats. Hopefully that's the dream and we do have an amazing like migration story, that our team has worked a lot on so definitely check it out and file our file issues. The usual give us feedback yeah, all right, okay, good I'm flying. So this is Andrew Andrews great. We got a pet dogs together at ignite. Andrew was here reading Ed's new book mastering Zaman forms ed, is also great and David who's on this call did the foreword so I'm not gonna, go to the blog.

D

The blog is kind of just reviewing it and I don't want to give away any spoilers in the book. You know, there's, obviously a really thrilling plot and a whole story about building apps, but you should definitely check out andrew's blog check out Ed's book and, if you're wondering if this book is for you, this is a good blog post to check out ok. Last time, I missed a huge, huge blog and I completely forgot to mention it and a couple people brought it up to me and I was really happy.

D

They did shiny, which we've talked about a couple times on this community, stand up by Alan Ritchie, the official one dotto release the official core shiny everything. Is there one dotto ready to go and shiny does a lot of things. If you go on Alan's blog here, so it's just out and Ritchie Alan see Ritchie net. He does a bunch of stuff about shiny, which is great, but this is kind of the TLDR of what shiny has so notifications, geofencing file, uploads and downloads and sensor stuff, all this great stuff.

D

The big thing about shiny that was, it handles background jobs for you and that's awesome, and then he also a little bit about the road map and supporting more stuff with shiny in the future, so check shiny out. If you haven't yet um Alan's great and like our side that this came out in the end of January, so it's been out for a little bit and I'm sure there have been updates, but I wanted to make sure that I called out that it is officially one dot.

D

Oh well, hi, danhype where'd you get those prism, emojis I want I want those. Okay, dan has prism emojis in the twitch chat if anyone's interested okay, this is a series by rendi, Sam boy, I, believe it's four parts and it's using something called Braintree payments, which is a like a PayPal subsidiary, and it just helps you as a merchant accept online payments, and so what this is is the client-side integration and the Sam reforms app.

D

It's this one's from the end of January, but there was one most recently a couple days ago and it just shows you kind of just how to get it set up and then I think the other ones are linked below yes, so the end of February was part, 3 click and then part 4 will be coming soon. It's drop UI, but this one is actually like being able to let people pay with Apple pay and PayPal, and your xamarin forms up cool and.

C

Randy is now an MVP, so god I gotta give them an acknowledgement for that too. So excited.

D

Yeah, a snippets contributor, that's.

C

Cool too, that's that's equally as valuable. It.

D

Is I agree: okay, I have to steven blogs this week this month, even the wissen and the wissen dot io. This is Steven and Gerald are kind of the like snippets owners and Xavier. But Steven also has this really cool thing on his website. That does this thing and I couldn't pick between the two of these so I'm doing them. Both one is that there is a new release of debug rainbows.

D

If you haven't used it before in your running app you just set like debug rainbows equals to true also it works with heart, reload, very cool stuff, and it shows you all of your elements just rainbow II. um Oh there we go, so this is actually to help you with brids and laying things out and making sure everything is aligned, got line and block mode. This is the new feature, but it's just to help.

D

You make sure that everything is pixel perfect if you're doing any wonky layouts that you're not sure about- and you think that you know- maybe something might be off a little bit. So it's a very cool new feature. The other one is new new morphism new new. You might have seen Miguel tweet about this a couple weeks ago, so it's kind of all the rage right now.

D

um What it is is making things on you eyes that look like real-life things so, like this off switch this back button that it like you, you slide it and it'll go back or whatever, and this is kind of it is. It is definitely cool. It's hip, it's cool, you need it in your life. I I, don't know if I need it, but it's definitely hip and cool. So great I do love this iPod thing. That's not actually an iPod, it's a record player, but that's kinda.

D

What the iPod was designed to look like so also very cool somebody.

C

Actually had an app in the App Store that was that I don't know if it's that exact design, but it was the I original iPod design and yeah I got kicked out. Oh wow.

D

Interesting, alright, well, Stephen takes you in a deep dive of what this is and then some of the ways that you can do it with custom renderers with ios and android, and then you know deep dive, deep dive. This is a pretty in-depth blog, so definitely check this one out, especially if you're interested in this kind of design alright. So this is by what is it with you, people and your blogs and notifications? Everybody I love you all, but I don't want your blog notifications, just tweet me.

D

This is like every time, I open a blog. Now it's like no I, don't want them. Every.

A

Website ever it's like please subscribe. Please subscribe yeah.

D

Although I am glad you asked me about cookies, that's good, so thank you. um This is Damian and he wrote about using reactive. You I was Dameron Forbes if you're unfamiliar with reactive, UI, I have I, have heard different definitions based on who I asked, but I would say. For me it's just an Envy framework and it's really cool. It's got a lot of it. It kind of builds off the reactive extensions library, and you know, handles that kind of stuff, so check this one out if you're interested in it, it's just getting set up.

D

It's an introduction. It's not like a deep dive, so if you're totally unfamiliar with reactive UI, this is an approachable blog for you. Few more. This is mark. Oh wait, I! Oh, do this every time I go to the Twitter, it is Marco, I was gonna, say Marco I wanted to make sure I didn't get wrong. This is cool because, as you know, xamarin plays nice with everything, including azure and azure, apparently plays nice with WordPress, which I had no idea about.

D

So you can build a xamarin app and have WordPress talk to a sure to send a push notification to that app on their phone. So if you have a blog and you want to build an app for it, he takes you through the steps to do it. It's pretty cool, he does it in his blog, which is awesome and he does have a app for it, which is also awesome yes and I.

D

This is a good intro to like just getting started with Azure, or he does a good job explaining that stuff you're newer to the Azure world for sure, okay, I love, okay, I had to UM Lodi is an animation library. If you don't know what it is, it's awesome task load review is I, don't I, don't know what the best way to describe.

D

It is besides an async way to load stuff, but this is just using Lahti and task loader review together and it's a pretty cool, like collaboration, I guess between two awesome community, plugins and task load. Review kind of this is what you can do with it. So it's it's kind of like a like. A state manager right so loading error or on refresh it's empty.

D

It's not started sort of like that, so meant more for when things are loading like your lists and stuff, but you know a lot of times when you're loading, something you want. You know an animation that says.

C

Yeah, you don't want, you, don't want people waiting for something and not knowing if it's broken or not exactly.

D

C

Think if developers are using FF image, which kind of has this functionality baked into it, specifically for images, you're kind of used to it there, but it looks like this is something you can use pretty much with anything and he's showing how to use it with Lottie, that's cool. It.

D

Is really cool and I love that they use a DeLorean as one of the loading enemy? He.

C

Loves this pixel art for sure. Yes,.

D

So very cool stuff, all right, two and a half two and a half more two. More really Sharla did one about data caching, which is definitely a topic that you can go various levels of depth into. But if you are interested in data caching, if you're using local databases, if you haven't touched it before and you are afraid of it, this is a good place to start.

D

It uses James's monkey, cache library, oh yeah, oh yeah and kind of explores the the API of that and kind of how simple it is to just get started using that to cache some data and she's got a lot of really good makeup on this list that she cashed, because the internet was down so got to be able to online shop and you don't have internet.

D

Finally, other Damian and Damian does a lot about CI, CD, dev, ops, all that great stuff, so his blog is really awesome if you're kind of getting on board with that this one's from the beginning of January, and this one is just being able to see as your dev ops on Azure dev, ops, different versions of your app and you know, making a pre-release and all that great stuff, so you might be seeing like if you're a visual studio preview user. You probably seen like there's two icons, there's the preview icon on the regular icon.

D

Well, this is something that you can do with your stuff using Android, dev ops so definitely check that one out. Finally, yes, there is a dotnet foundation store and, yes, it does have xamarin monkeys on it. Yes and I. Don't James? Do these ship out anywhere anywhere.

A

In the entire world anywhere.

D

In the world- and there are women's t-shirts, including women's Sammy, GaN t-shirts- some pretty great, pretty great- all right- that's it I'm done David turning it over to you, I.

C

I wanted to talk to Shane for a minute before we jump into the PRS so Shane. Would you say that reactive UI is an mvvm framework.

B

C

You can you can use it in an mvvm, you know you can use it, but yeah I think by itself it's not necessarily and yeah go ahead chain. You you describe because you've used it quite a bit. Yeah.

B

And that's I mean that's one of the big reasons I like it is because it's not it's not heavily opinionated.

B

So it's more of just supercharging a your standard in bbm setup so like if you don't really want to go because sometimes when you go like a lot of the larger frameworks, are nice like a medium cross and prism and such but they're very much an entire philosophy like so a framework, whereas, like reactive, you eyes, nice, because if you just have a home-baked, mvvm setup, you can plop in reactive UI and then just really make use of reactive concepts over in vedyam paradigms.

B

So very simple cases like reactive commands or reactive fiying, your property changed events and things like that so being able to kind of manage those functionally and reactively. So that was why I was always kind of a big fan, because you could just have your existing application. You'd like you, don't have to convert over to a reactive, UI philosophy.

B

So if you have an entire application, that's built, you can just pull and reactive UI and start using a lot of the useful features there for areas like reactive commands and like property, changes and stuff, so yeah.

B

So that's why I really like it, because it's more more toolkit based and then I know, I saw Rodney on there he's going to give a talk on a lot of the stuff for the.net comp, so that'll be really informative and he he's working on I think it's called sextet after the instrument thingy, which is like a navigation tool using a navigation framework for reactive UI. So then that'll start kind of pushing it a little more into the framework camp. But since it'll be handling more of your app as well.

B

But yeah reactive UI is very, very cool because it's it's just it's it's a way to just it's a nice toolkit of things. So it's kind of like the MVP light idea as well like how indian light, if you, if you just wanted a helpful set of tools to just sort of reduce the friction of certain things, but you don't want to have to submit to an entire paradigm. You know things like that. Are really cool, so yeah I mean a reactive.

B

Ui is awesome like I, it's I, don't even know how I would build an app without using reactive. You just did.

C

The xamarin TV app, which you'll show in just a little bit I, know it's interesting times.

B

I think to myself, man I wish I had reactive on this yeah.

C

So so that's a good transition, because I'll go ahead and start sharing. My my screen here.

A

C

Big fonts, big fonts, and so so the transition here is that the last time that I built an app very similar to xamarin TV, which is you know, not exactly a YouTube or Netflix clone, but I used reactive, UI and I used c-sharp for Marco, and so this was all c-sharp. I was like I'm gonna, go all-in on this experience and just learn from it and like can I build a production app using these these these ways these philosophies and I I really really enjoyed it.

C

Personally, I was effective with it, I still love my mvvm and my zamel don't get me wrong. I am definitely a developer. That I can appreciate a variety of things.

C

I know that many people go all-in on one or the other and and that's cool, but what we are definitely trying to do is kind of foster the whole community, the whole ecosystem of xamarin developers that want to use dotnet the way that they use net and be successful with it using xamarin forms and xamarin for cross platform, and so part of that is that we recently took in this pull request from Vincent. He worked long and hard on it.

C

You see it was part of hack, Tober fest on the very last day of October fest, the 31st I tweeted at him and said where's, your PR buddy and, and he submitted it, and so this is what it is, and you get this nice fluent like syntax, that that supplies a lot of the things that just make C sharp UI declarative easier to do easier to read, and you know, if you're coming directly from zamel and looking at this, it takes some adjustment for sure to to you know, locate things figure out where things are, but it doesn't take much and it's really cool.

C

And then, if you pair something like this with a c-sharp hot reload solution like a live sharp, you have a very fast dev inner loop as well, and that's something that we have publicly already shared that we are working on to build into Visual, Studio and and combined with our existing zamel reload. So very cool stuff. I really appreciate this and I think the one of the most interesting things well. First of all, just the volume of information that Vincent supplied with it.

C

It's like he almost self, documented it when he submitted the PR, which is really cool but I mean just look at the reactions on this I mean I, know that he kind of politic a little bit and and whatever to get people to register their interest in it. But this is absolutely something that we look for when we're reviewing PRS and trying to understand the impact. This is not all we look for just because something gets 117 thumbs up.

C

Does it mean it's gonna get merged, but it absolutely does mean we are going to go talk to customers, one-on-one, we're gonna, understand their business needs and we're gonna figure out. If this is something that we really want, so very cool, you can go play with this today and I'll be doing some more streams later to showcase it.

C

I was going to do a stream yesterday and got interrupted something that Shane is gonna, show off here in just a little bit from Peter, Foote and I'm gonna continue saying Foote because it sounds way more European and he is in the UK which I guess. If you're in the UK, you can see yourself, European, I, guess you're, not in the EU anymore right so I don't know, I'm an American I, don't understand these things, but he provided this PR quite a while ago, August of 2018, so you know stick with it.

C

Y'all things can happen yeah, and so this is yeah playback for video and audio all the properties, all native so really really cool stuff. Here, I'm excited that we were able to take the opportunity with xamarin TV to get this thing in and it works great. It works great I mean there's, certainly some things that need to get worked out. So it's still considered a preview feature, but we'll work through those things and I'm really really digging it so far. Alright, moving on I wanted to give a quick shout out.

C

Also something Shane will probably touch on slightly. Is the new state triggers that are available, so we've got adaptive triggers to do react to the window height and the window width I just said those backwards, as I pointed to them. That's that's fine.

C

It's another experimental feature, but it builds upon the other triggers that we have you've got. You already have data triggers event triggers multi triggers and state triggers. There's also some other PRS that Xavier has been putting together and he contributed these from the team, but they just you know, supercharge your ability to use these with with visual state manager or just directly on controls, and we made use of that in the xamarin TV app.

C

We have some interesting PRS for some of the other platforms, so WPF, Linux and I feel like I. Just forgot one, but those in particular, oh and kind of Mac OS are more on the community to support those at this time. But we are certainly seeing more and more interest in getting your xamarin zaps on the desktop and so excited to see that there's additional PRS coming from the community, this particular one lights up the icons on the toolbar for WPF.

C

So thank you for that. One men lumion, don't know how to pronounce that so I just made it up. Look at this one look at little James there. So of course, of course, we had to bring the media element to Tizen and I say we speaking on behalf of the Samsung Tizen.

C

Teams is a very common with the right word to say: it is very, very expressive expressive, so he's good for he's good for memes for sure I'm trying to catch up on that I'm trying to work on it in the mirror. You know every morning, I'm like okay, you know do, though, what is it James that? How big is your fish? How.

A

Big is your fish you'd.

C

Only get that just.

A

Saying it, but like I'll, go back to my thing is during presentations as me: Mike James I'm, like blue steel or as Ameren. We would always say, like you, can share this much code and then someone put in like us going fishing.

A

Anyways, that's.

C

Good I'll have to to really properly use that I'll have to fix my camera I'm zoomed in too much but yeah. So if you're doing Tizen work media elements now there that's very cool and then Peter again has provided a replacement activity indicator for WPF. So if you want to use the more modern dot spinner for activity indicator here, it is it's been merged.

C

Let's see yeah and you know. Interestingly, a lot of people still do in WPF, not just legacy stuff either. Let's see here, making it able to disable the tabs okay, so disable tabs is kind of misleading as I read this, but this is from hey Zeus Pedro, hey Zeus I've got it backwards.

D

C

D

C

Of which, just as a funny aside, maybe I was looking at a chat message or no wasn't a chat message. It was a. It was an email reply and all I could see was. Thank you Jesus and I was like. Oh that's, really, weird, to see Ana in a business email like what the heck is going on and I opened it up, and they were replying to somebody whose name was hazus but caught me off guard all right.

C

So so, when you have the more tab right on iOS, it pops up the more view with all the other menu items that can't fit into the tabs, but you may want to disable some of them, so this PR from Pedro makes that available. So this one's still open. So it's still under review. If this is something that you're interested in or you have an opinion on, or you would like to take a look at it, please do.

B

Over use a review I see a little orange dot like it's working through the iPad, so I think we're making good progress on that. One good.

C

Progress, oh yeah. We have so many tests that run on PRS we're getting really good at strategically targeting which which tests to run so. We optimized all right so touch gesture, recognizer, plus the visual state manager. So this is Constantine. He is a frequent contributor to the project and always has some really cool stuff and quite a bit of it lately I think has been in the gesture area. So, as you look at this you'll see that with this PR, you get a lot of touch, gesture information and actually Shane.

C

Wasn't this one that you kind of noticed and we're talking about in the channel and the team Channel yeah.

B

So he did he kind of the way he implemented was really nice. So basically, it makes a lot of the stuff really cross-platform. So you have this touch gesture here which effectively just propagates out what's being touched on the screen and then from that you can just sort of create these cross-platform calculations for everything. So like Ben, like a long press, a rotate and everything which are purely based on this touch gesture, instead of having to go to like the native implementations of those.

B

So where we're at right now with this is that we broke out, we broke out the touch gesture recognizer, which is going to be the fundamental base class and then I need to get I'm going to get to this one. Today or tomorrow we have. We just need to settle on the API for it. So because we haven't it, we have another touch, gesture, API, that's up so on this one.

B

If anybody wants to go in and sort of comment on what they see here, I'm gonna leave some comments probably later today to work with him to to see. If this is how we want the api's to work, because there we have another spec out that we initially did for all this and then this one's a little different, which this one's based a little bit on chase floral I, think was 2 RL, not sure you say his last name.

B

It was kind of based on his, so I was gonna, reach out to him as well and get his opinions and so yeah. So right now, this one is mainly we're just figuring out the best API for it and then once this gets checked in then I think that's good. It's gonna, gangbusters, two more Guster's! That's.

C

Great you know how long I've been asking for better their gesture support, yeah.

B

So this is a really good, generalized solution where we're gonna get this one in first, but then, once this is in, you could basically build anything that you need to do with the touch which will be cool and then we'll start offering up some more baked in ones. But this will let you just kind of do whatever you want yeah and then, after this figuring out orchestration stuff, but yeah.

C

Yeah renowned well, then, we'll get our drag-and-drop right. Yeah.

B

Which, unfortunately, we can't use the work that he's done, because there's some native stuff for that yeah so because, since you have to like drag it out of the app you know that stuff we have to enable at the at the platform level. But yeah we'll get the drag-and-drop we'll.

C

Get there we'll get there all right moving on, we have an improvement here to the talkback, so accessibility is absolutely you know if it's not the top thing on the list, it's really close to the the things that we want to make. We are nailing for salmon forms. You know. The great thing is is that when you need something from an accessibility standpoint, you can always go to the iOS Android layer of the uwp layer and do the work there so because you're working directly against all those native API is at that point.

C

But you know you're using xamarin forms for your productivity to go across platform. So we want to make sure that we're giving not just a you know decent experience. We want to give a great experience. It just saves you tons of time and so I love, seeing a community PR from rye, with a really cool icon, nice and so yeah. This improves the for Android, the talkback.

C

We have a recurring customer call where we talk specifically about accessibility issues and improvements and share knowledge, because it is such an interesting topic and it's handled slightly differently on each platform. It's not a very straightforward thing to to do and if you're not working with it on a regular basis, there's a lot of ins and outs that you're not aware of so very excited to have that and then, let's see here, I think this might be the last one on my list.

C

So Bob face what a great handle that is added support for scale and rotation of images on GDK, which is our Linux back-end, so check that out. So if you're doing some xamarin forms targeting linux, whether it's a Raspberry Pi situation or you know a desktop there, you go still getting some love on those other backends. So I think that's what I have for PRS.

C

There were actually a lot of PRS to the to all of our projects, but I just wanted to cover a few so that we could spend more time then talking to Shane and and digging into the dual screen stuff, but I think before we do that. What do you got? James got.

A

One last thing, and then I'm done so we last week we can have a go release: xamarin essentials, 1.4 and 1.5 that came out right. After mostly everything in 1.5 is the same as 1.4, except for we have the Android support in targeting Android 10, some stuff I'll go through really quick here is we added some new features both from us and from the community, so we added the way to detect a theme.

A

This is nifty, no matter how you're building your app I do this in my apps to switch between light mode and dark mode, and if the user specifies it like in my Hanselman app and the contacts application, because a brand new cross-platform permissions, API Allah this one's a good one and I hope I hope for the essentials for forms Maps. Maybe they can, they can make this a dependency. This is super duper good. It enables you to check and request permissions asynchronously, and that's it.

A

You just say what permission you want and it will just handle it for you automatically. You, of course, have to add into your code like the manifest stuff, but it provides support for everything. Battery calendar, camera, flashlight, launching apps locations, Maps, microphones, Network States, all this stuff, and this is what xamarin essentials uses under the hood. But now you can manually control that yourself. Lots of good PRS. Mr. Lacey did get complimentary color, so you get the complementary color of any other color, also some good ones for new weight, converters and meter converters.

A

So you can convert kilograms to pounds and stones, the pounds and meters to international feed and back and forth really super good clipboard change events, and also one of my favorites that we added was originally a community contribution that we extended to add platform code to get the current activity view controller register for activity changes. It's really really nice. So this was taken from some inspiration from my current activity. Plugin and now it's inside of xamarin essential. So you can say platform current activity boom.

A

You got the current activity, get the app context super easy great, especially if you're doing stuff, with like custom renderers or platform code yeah, and then a bunch of issues fix all sorts of good stuff, great community kind. Tribune's. We list them all down here. So thanks, Matt, Pedro, Manish, Nicolas, Bob, everybody Patrick, everybody that's helped out, and we also have 1.5 like I said that one does two things: Android X migration, also a brand new web Authenticator API to talk to asp.net, back-end or any back-end.

A

Actually it doesn't have to be a speed on it, but that's our sample to easily from a single line of code authenticate with any oo, auth provider or Apple sign in', which is super duper cool and our sample does that which is really really nice. So here the sample shows you like.

A

If your user was on iOS, 13 and supported apple, you could authenticate with the a special Apple sign-in Authenticator, that's part of it or there's just a generic web Authenticator it'll handle opening SF, Safari view or chrome custom tabs, and going back and forth it just says the authentication, your back-end handles all your secrets handles all your refresh token.

A

So you got to set that up, but it's all there and we're gonna have a great documentation on this rolling out this week and also a blog post from our good friend John dick who wrote the entire thing, which is awesome, so definitely take a look at that and without further ado. Shane is on Donna what you got for us, Shane all.

B

Right, let's see, am I coming through yeah.

A

You look great alright,.

B

Cool okay, so yeah we're gonna talk about dual screen stuff here, so I wanted to just kind of start out with the sample app that we built I just want to start out with the sample app here that we built, which is our salmon TV app. So this whole app here is based on the two paint view, just kind of demonstrating the capabilities of the two pane view.

B

So if you look at this app here, basically the two pane view splits right here at this line, and then this is our pain one, and this is our pain two down here so yeah and then, if you drag it over into the center, you can see it splits out. So now this is paying one, and this is paying two over here, so it just kind of naturally conforms itself to the duo to the duo, designs or or if you have a single mode.

B

It also adapts to that kind of takes this adaptive layout concept to to how how you, how you want to display things so, for example, if I start playing a video here, this is where you can see our media element, which we just checked in and then I didn't really test.

B

Yes, there we go, you can see now it's only showing one pane, so it has this adaptive concept where, when you go into landscape now, we've set it to only show one pane which is Maddie talking about compile bindings and then, when you rotate it, it goes to the two pane view, because now this is sort of the space that you want.

B

So that's, what's really cool about the to paint views it's just this very adaptive design and then Xavier built a lot of neat stuff with some state triggers, so that was just kind of showing how we can how we can alter the design based on the state. So it's really neat here is that, basically, if you look at the page, we set up these triggers to indicate if it's spammed with video or if it's not spanned, with video spanned without video, not spanned without video. So those are.

B

These will get a little simpler because we added some specific duel triggers, but this is kind of the different layouts that we want based on where you are what you're kind of displaying in the application. So you can see here when it's banned with video.

B

You know we have kind of different settings on uwp versus Android yeah, and it's neat because you can just super configure this all in your zamel. We had some really messy code in our view model until xavier kind of got all of this stuff working so yeah. So that's I kind of wanted to just start with our with with what's what's what you're capable of here and then we we can kind of start demoing so and then I have this running on a few different applications here to kind of demonstrate.

B

So here's, if you look at the if you go into our examine form samples there's this is all of this stuff is in there and the user interfaces dual-screen samples. So this is kind of demonstrating all the different properties of the two pane view. So this is. This is kind of a layout when you're not dual-screen. So it's also a nice adaptive control, even if you don't have a dual screen app, so it can do things like switching.

B

You know your your configuration. You can use these. You can use these values to kind of size. How large you want the panes. So this is what we use in the xamarin TV, based on what page that widescreen they're, showing kind of the sizing that we want on everything, and then we use like the men, the the Y mode and the tall mode to sort of articulate at what sizes we want it to show a certain way.

B

So you'll see once once I kind of increase this wide mode here to be above the screen dimensions. You'll see, then it kind of disables wide mode. So.

A

So there's like a bunch of different properties like I, was setting this up in the app, so I kind of understand, like so wide mode is landscape mode and then right tall mode is like portrait mode kind of right. Yeah.

B

Yeah, so just kinda, yeah, Tom mode means you have that you're wanting to display things sort of in a yeah in a vertical way, and then Y mode is more that you're gonna have possibly more space wide portrait wide. So at one point they were kind of calling it like tall mode was like double landscape and wide mode was like double portrait. It's a bit of a mind, bender to kind of think about. What's happening there.

B

You know because you know like if you on a dual screen when you have when you're when you're in portrait, you know you're still in portrait, but technically your screen is wider than it is tall er, which is kind of inverted from usually when you are in portrait mode, you know so it's kind of an interesting I, don't know kind of messes, with your head a little bit when you're sort of thinking of these modes, but yeah yeah.

A

And here you're, sort of, like so in those state triggers that you showed earlier I, want to kind of try to wrap my head around and kind of be like I'm still new to it, even though I helped with the keynote and a bunch of other stuff too, but really in, like the the state triggers or the cave, when you're in this mode set these properties. So the two pane view knows how to lay out the controls. Yeah.

B

Yeah exactly and then I don't know if I can pull these up and I can pull these up real quick, so the are kind of some cool new ones that Javier added, which are part of the which is part of four or five.

B

So we added these triggers here where you can basically say you know what mode am I going to be in is is the window so when it's saying the window, I can bring up the demo here so right now, this window is in dual screen mode right here, because so this is dual screen mode and it's wide mode because it's you know it's stretched across so like what Javier has here.

B

Is we've added these nice little triggers here for, if you're, in single mode, if you're in wide mode, if you're in tall to kind of change the way your layouts work, so you can just really easily adapt what your screen is doing and you'll notice here with this with this demo here he's not even using like a two pane view like this is purely just triggers and that's it so like that was another thing we wanted to do is sort of enable some api's, so you didn't have to always use a two pane view so that you could, just you know, he's just he's just basing this all on a grid.

B

So you know you can pull these triggers in to anything and then just change, different sizing properties on your grid or anything like that to to sort of adapt to like your dual screen. Cuz the whole. The whole idea is exposing things so that your layouts are adaptive and not necessarily like you know. If app is dual screen, do this it's more like you know. If app has this type of width and height, then adapt your app to those scenarios so that that's kind of how that's how a lot of this stuff is structured.

B

So it's a lot of its structure trying to make it so you're, not necessarily directly thinking about the dual screen, but more your baby. You can make your app sort of adapt to it. Yeah.

A

Cuz, like the the two pane view, will basically just do the right thing for you out of the box. You set a few properties. You don't need all the state triggers or anything like that. But if you want more control over it, then that's where these sting triggers come in right right.

D

Like some of the comments.

A

Are like, oh, that looks like a lot of code, but it's not necessarily required it's like. If you want that fine Green control, you're gonna, you kind of set that up in there yeah.

B

And in certain things, just kind of a certain things are set up to just adapt. So like you'll see right here. This is a two pane view that I have off-center and you'll see that it automatically sizes each pane to be on each side of the hinge. So those are some of the scenarios where, like a two pane view, kind of just automatically takes over and kind of sizes. Everything correctly, but you can also set up, do I.

B

Have that one in here yeah, you can also kind of set it up like here see this is just a grid. This is basically like a single grid that I bound to just the site and I've set like the column, one in the column, two to just be the width of the of the windows. So yeah I mean it's something you can kind of pull into your existing apps.

B

If you want to try to make it dual screen aware or not and and kind of make your your layouts adaptive the to the the TV one just kind of has a lot of code, because it's a very there's just a lot of different postures that we put in it so but yeah a lot of it, too, is just to sort of like overuse. The two pane view like go a little bit crazy with it just to show how much different stuff you can do so yeah.

B

That might be why that one looks a little heavy, because we were just down. We were trying to really just push all the scenarios like it's probably a little bit excessive, even but yeah. We just wanted that. You know this is stuck you. This is something you could do. I mean you can kind of just piecemeal that, however, it makes sense for you, yeah.

A

That's this one: when I was going through just one of my apps I, I kind of said: okay I have a bunch of pages, but what of them could just be pieces of content that could be on the left and right or, if I navigate in, do I really need to navigate in or could I display that side by side like what made the most sense in general for each page of my application and some of them just was like okay well right now, I'm displaying you know two rows of column, but I could display four rows right and I could flip right or left.

A

You know that was some of the things that I was thinking about when I was sort of designing my application, yeah.

B

Yeah definitely, and then I mean the big thing to think about- is that the two pane view is a it's basically just a smart. So that's like, even unlike the winuae implementation and ours, it's it's just a grid-like. It inherits directly from grid and then it's it's. It's basically just setting grid properties based on what properties you've set up and what the dual screen one is set up. So it's it's.

B

It's not like a weird crazy layout like it's just it's kind of like a no-hassle adaptive screen that you can use, but there's a lot of things you can kind of tie into. So then this is where so kind of when I was giving people credit. One of the really cool things about the salmon TV project is that a lot of it was a coalescing. I have a lot of efforts.

B

So a lot of the stuff in salmon TV was made super simple because of all the hard work that Ruby's been doing on the carousel view and then all the work, all the stuff that that's built on the collection view, which is what the stuff easy was doing and then all of our sort of effort to get the media element in was really nice to get that all working.

B

So the salmon TV app was really exciting to work on, because a lot of it is based on stuff, that's new to 4 or 5 that we really that we were really able to kind of get going so like. This is a really cool example here, where it's like an e-reader sample and like this is really neat, because really all this is, is it's not using a to paint view or anything? It's just a collection view, and then I set the collection view snapping to mandatory single.

B

So that's that thing where it was snapping and then I set. The item spacing to the hinge width so I'm just this is this is really this is it. This is everything I needed to do to make a collection view so that you could have an e-reader, that's snapping, you know, and this isn't using two pane view or anything. This is just using.

B

You know an item spacing that you want to use for the hinge width, so you could base this hinge with on, if they're on single screen or not single screen, just kind of how you want it to display. So there's there's just a lot of things that we've exposed, and so yeah I mean a lot of it too is kind of seeing, especially since a lot of this stuff is in beta and they're, still trying we're all trying to figure out the best way.

B

People are going to be well, not figure out, but learn the best way. People are going to be using these things so yeah. We really wanted to get a lot of this stuff out into people's hands to mess with to see you know what makes sense for them. What's what would be easier for them and we're gonna be doing additional work with, like shell and master details, to really make those things. Dual-Screen enabled by default you know so that you could like on shell.

B

You could push a page and it'll just show up on your right screen and, like you, don't you don't really have any like. All you do is add the dual screen library and then that just lights up, you know things like that or scenarios that we're sort of that we're working towards. So it's yeah I mean it's just kind of neat the yeah, the different kind of ways that you can show and like here's sort of like the companion pane. So this is basically just an it.

B

This is just a collection view here showing these this way, and this is just a carousel view that you can use, and then it's just nested in a two pane view. So and then the two pane view is all written, like I said against a grid. So it's all cross-platform so like here it is working in WPF to change the white mode, one.

B

Yes, here it is working in WPF and then it also works on iOS, so yeah I mean it's also just kind of a nifty control for having kind of a way to sort of separate out. You know, like your data, like you were saying, you know, if do I really need this to be a second page or can I just kind of make it a details and it'll just adapt.

B

So, for example, if you use the to paint view I'm like an iPad, you know versus like a phone, you could have it easily, adjust your content using the triggers and using sort of these, these toggles and settings, and things like that. So it's just it's a really handy control for things for that, for those behaviors and yeah and then it's it works. Just super well with the with the dual screen devices got.

A

It yeah that makes a lot of sense. It's you know when you're going in and customized ain't going screen by screen, it's mostly I understand this guy need to take a look at the I need to take a look at the the slider of sample, because that really sort of helps understand like what mode the different things are in in general. So that's really cool yeah.

B

Yeah, the master details is kind of an implementation of master details where, if you're in single pane mode, it's pushing pages two screens and then, if you go into dual screen, then it's it uses a two pane view. So the details sample gives you a good example of switching between contexts so in one case using a navigation page and then the other using a two pane and sort of switching between those.

B

But this is one of the snares we want to enable a little more fluidly, but for now the it's still pretty easy to kind of get this going. But yeah all these samples are available in the salmon form samples, libraries I, see.

A

I think the idea we were floating around that I heard from you I think you kind of mentioned. It was like right now we have master detail page, which is kind of like a flyout navigation right but yeah. What, if you had like a dual screen master detail page like just did what you just showed right: yeah.

B

Yeah exactly so cuz like natively, that's how the UI split view control works, so yeah having something like that we can manifest at the forms level. It's that's a more correct implementation of master details according to what what the term indicates instead of like a flyout page well, is, is definitely gonna be highly motivated by the dual screen scenario. So we have somewhat work we're doing with shell to kind of enable that and then we'll probably pour some of that into the the master details.

B

So one of the things we're thinking is like on the master details page if you're on a dual screen- and you have the flyout lock just have the flyout width be automatically the size of like your left pane. You know things like that that you can do so. Yeah very cool, any yeah any of those scenarios. That's the biggest thing, we're looking for the types of app you're building. What kind of scenarios you want enabled? What's?

B

What are we still making too hard for you to do? What works? Well, yeah I mean thing anything like that. Just just yeah, just let us know ping ping me on Twitter or create some issues. Yeah.

A

For sure, and the nice thing is that the everything is inside the xamarin forms repo, correct.

B

Yeah, what do you buy? Everything like.

A

All the code for the dual screen- stuff yeah.

B

It's just all in the salmon forms repo, so we just have a there's just a dual screen project here that has all the dual screen code. That's what you're asking yep.

A

Yep yep, okay, cool.

B

And it's just a beauty is a separate nuyen yeah distributed second separate nougat, mainly because the the Android wine takes on a new gate dependency, so yeah before the window. Stuff is all built into the SDK, so that one you don't necessarily need it as much, but because of the separate new gate, but we've kind of bridged the gap a little bit like some of the interfaces for dual screen we've put into core. So that way, they're sort of like that that dependency injection concept, so at core we can just say hey- is there?

B

Is there a library registered against the ideal screen interface? If so, make things start to adapt? You.

A

Know so that's.

B

That's kind of the scenario that we're gonna start highlighting so like by essentially just installing the dual screen. New get things will just start working with dual screen and then you can start tweaking stuff. So that's that's. Where we're gonna start getting with like four six and four seven on is really customizing. Those yeah.

A

Sounds like, as we start to really understand more of the apps that everyone watching is building. You can just make it even easier and yeah.

B

So a lot of it now is just like here's. Let me give you as much information as we can about what's going on, and so you can build what you want and then tell us where, where the frictions are, what would be nicer? So yeah like, as you can see, with the salmon TV I mean that's a pretty involved, app using dual screens and it's it's a single content page using a single two pane view, just swapping out view models and it works great.

A

C

And one other comment on the: do: you still have the solution open for the xamarin TV yeah? It's just show the nougat dependencies because we used a lot of community stuff. This is a community.

B

C

B

C

Image dam, animation, yeah, so that's on the state, squid yeah.

B

So all of these tabs here- that's all sharknado, which is kind of letting us just do that on in context like that and.

C

B

Lazy views so it's optimal yeah with all the lazy views and stuff so yeah, and then this is also using a lot of font icon images. This is all font stuff from I figured what that one was, but yeah, Sam, animations I think that's all Xavier mmm-hmm skia sharp is what's controlling. This withdraw out, probably can't see that there we go I yeah, which is controlling all this. This is all ASCII.

B

Is sharp control, embedded in pancake view, I, don't remember what that's using what that or states quitter are for Xavier put a lot of that stuff in he's kind of our demo expert, but yeah. So you got a lot of community stuff which and yeah a lot of these libraries are great. Sharknado was a really good one, so yeah yeah.

A

And some questions about, can you just create them all the stuff in c-sharp instead of zamel? Of course you can anything cratons, Amelie and Creighton c-sharp, so boom. Of course,.

B

Yeah I mean it's just any of the properties that you kind of see on the two pane view are just those are all you know: c-sharp I, don't know yeah I'm, guessing that the markup hooks from Vincennes P are like those haven't been written yet for some of the fluent API, so I think you kind of have to I I'm, not sure how those are generated but yeah, so those the fluent stuff probably isn't highly lit up for this right.

C

Yeah but otherwise you write, you write the extensions yeah yeah.

B

So that's that's good. We find a pin, write that down right extension, I'll.

A

C

A

C

A

Original is a mercy view like we were doing a lot of it in the code behind anyways. We would just sustain she ate the the views and the code behind there's like a view, Model View mapping, and then you would just set pain, one set pain to which is like fine I thought, but what I liked about? So? What I liked about, obviously doing in the sample? Is you just reload that I reload that exactly.

C

A

C

Able to do everything and everything you possibly can in zamel makes you so much more productive with Sam law really yeah.

A

The viewers ammo person it's good to go yeah.

C

This is cool I, like.

A

This sample too, because there'll expand with video right, which is a boolean that you said and then set all of these properties right on it, which I think is cool cuz then is you're, basically just telling it what to do so. Yeah.

B

Yeah, so this is very just a buying a binary trigger. That's at that point lets you do pretty much anything, because this is just binding up to your view, model yeah. You can kind of articulate anything you want here so and then we're gonna. We have a PR. Xavier has one for like composites, so you know we could. We could change this to like a composite with like Javier's new stuff.

B

This was kind of built before we had some of this band mode triggers and the composite, but a lot of this could be condensed into the dual mode triggers and using kind of a composite trigger so but yeah. But it's it's nice. You just kind of set all this up. Ins mo yeah.

A

It's cool, like David, said: choose like, as I could tell like, as the team was developing, it's like I'm gonna change this API to make this Lesko to make this better make this easier. So.

C

It kind of like really involved.

A

Overtime, so I'm excited to see where it goes. Yeah.

C

Awesome thanks Shane thank.

A

You thank you. Awesome I will head back over to the vids dude. Well, thanks everyone for tuning in, of course, Shane and poppin. Are you against shops here on your screen? If you want there Shane there we go so.

B

The button there is fun.

A

There we go well Matty had to leave so thanks Matty for all the stuff. Of course, you know he's go to live net, to bind the community links and links to all the videos and all this stuff. That's it anything else from you, David no.

C

I yeah- this is great I'm, so excited and definitely joined the look forward to the keynote for the.net compo Kisan xamarin. We're gonna share some really exciting growth numbers and new things and we're gonna recap all the great stuff we've been doing so be sure to tune in for that. Yeah.

A

Absolutely it's on the 23rd, it's free! It's online! You don't have to leave your house I. Would okay I'll have to leave my eyes besides.

D

A

And the studio crew, you can stay at home, so that's it! Alright, oh and sweetie, we'll be there too. Alright! Everyone! Thank you. So much for hanging out don't forget to subscribe. It's a like buttons, do other things and have a good one.