If you’re interested in learning how to write apps for Windows 8 but don’t want to leave your desk to do it, then I have just the thing for you. They’re called HOLOs. That’s a Hands-On Lab Online. It goes like this.
First, you register and then when the event comes around, you log in and are hooked up with a Live Meeting to a presenter and a bunch of other attendees and also with a Hyper-V session to a Windows 8 virtual machine with all of the course work ready to go. You listen to the presenter for a while, and then you run through the labs with the instructor right there and ready to help when you raise your virtual hand.
There are sessions on a myriad of Windows 8 related subjects including…
- Creating a Windows 8 App
- Orientation, Snapping, and Semantic Zoom
- Searching and Sharing
- The Windows Store
- Application Bars and Media Capture
- Settings and Preferences
Go register now to save your spot. I created a short URL to a search of all of the HOLOs being offered – http://aka.ms/holo.
Microsoft and Apple have a long and tangled past. From most perspectives, the two would certainly be considered competitors, but when fitted with the right glasses (rose) one can also choose to see the two technology giants collaborating to add enjoyment, value, education, and information to the lives of billions. I used to teach high school and there were occasions when both companies made significant donations to classrooms to bring better education to my students.
But right now I want to talk about a fundamental difference in how each company appears to approach the tablet market.
There’s nothing special about a tablet. It’s just a form factor. Phones are this big… tablets are a bit bigger… desktop monitors a bit bigger still. They’re just screens. Sometimes they’re sideways and sometimes they’re upright. Sometimes they’re stationary and sometimes they’re on the move. Imagine for a minute where our children and their peers will find screens - in the kitchen, in the car, on the bus, on the train, and hopefully rolled up in their book bag. Remember… it’s just a screen.
Apple threw some words toward Microsoft recently saying that tablets and desktops are fundamentally different and that attempting to put the same OS on both devices would end up degrading the user’s experience. I suppose Apple is saying this precisely because they have a different OS their tablet than their desktop.
I see the Windows 8 strategy as relieving. It can be nothing but easier for devices to collaborate when they are running the same bits. I have Windows 8 on my TV, on my work PC, and on my tablet. We’re still in beta and already the experience is nothing short of delightful.
I look forward to the many more device form factors that are inevitably to come!
I’m giving away one large (8.5” x 11”) Visual Studio 2012 logo window decal and one small “I heart VS2012” decal. I’m sure these will be all over the place soon, but you can be the first around if you’re the lucky winner.
A what?! It’s an iPazzPort. I ordered one recently and I was sent two. Not a bad deal, but I really only need one, so I decided to give one away to one of my Twitter followers. It’s new in the box. Read on for details. First, what is it…
I have a media center PC. Actually, it’s just a PC that I hooked up to my 37” LCD TV and installed Windows 8 on. I like the start screen tiles on my tablet and my PC, but they’re awesome for a media PC too! I put all of my media related programs on the start screen and now it’s super easy to launch whatever I want.
Well, I had a little remote control for the PC, but it decided to quit working a few weeks ago, and my wife asked if I could find a good solution. I think I did!
I found and ordered this iPazzPort. On one side it’s a full Windows keyboard including the win key (which is important), arrow keys, and all of the symbols and function keys. Next to the keyboard are buttons to control a gyro mouse, so you can just swing the device around in the air to move your mouse. You can hit a key to switch mouse modes so that you can either hold it the long way or the short way (when you’re using the keyboard). Then if you flip the device over, it has a few basic television remote buttons that you can train with your real TV remote. Finally, there are buttons on the side that act as page up and down which comes in extremely handy for web browsing and such. It has a rechargeable battery, so you just plug it into your computers USB port every few days to charge it up.
So I sent out a tweet. You can find it here. If you retweet that and follow me on Twitter then you’ll be entered to win. I’ll keep it open until Thursday, May 31. I’ll draw a winner at random on that day and announce them on this blog post and on Twitter by noon Pacific time. If you’re the lucky winner and you live in the United States, I’ll mail you the iPazzPort.
If you haven’t seen the modified help system in Visual Studio 11 then prepare to be impressed. Now when you go to the Help menu, you can choose Add and Remove Local Help Content. Upon doing so, you’ll be presented with a very helpful dialog box.
From here it is very easy to figure out how to choose which categories of help content you want to be installed locally and where it will be installed from.
…and what you’re seeing is kind of a cool little trick that’s not new to a seasoned JS scripter. Notice that what you have is a function wrapped in parenthesis and followed by what I like to affectionately call a football - that’s the empty parenthesis [()] that we developers hardly notice anymore. To make it a little bit more clear…
So it’s a function that is defined AND called. But why? I’ll tell you.
It’s because when you declare things in a function, they are scoped to the function. They are visible and available within the function but not beyond. The code you write in this function is not available globally, and that’s a good thing. Windows 8 apps may get pretty big and namespace conflicts would be likely. If you declare the variable foo in more than one place but each globally, then they will start conflicting and causing some runtime errors that would be very difficult to debug.
So where should we declare our variables so that we have access to data but only in the scope we need? I’m glad you asked. Let’s look at the scopes available to us and what they might be used for.
Some developers would argue that global scope should never be used, but I think there’s a time and place for almost anything and that goes for global scope. At the end of the day, you as the developer are responsible for making sure that your app works and that defects are not introduced because of globally scoped variables.
The interesting thing to note is that these page scope variables are not even available on the HTML page itself. If you define a variable in your JS file and then attempt to access it from a script block on your HTML file, it will be “undefined”. Remember, that what happens in a function… stays in a function.
So, the page scope function is essentially all of the code that you want to run when your page is loaded, and it includes some cool tricks to allow you to specify functions that will run when your page is “ready” or when the layout is changed (when Joe User turns his tablet sideways).
So what if you want to write a function and then you want to call that function from your page (say when a button is clicked)? That’s where you use namespace scope - another term I’ll take ownership of – patent pending.
If you’ve determined that you want to be a good citizen and avoid global scope, but you want to actually use some of the brilliant code you’ve written in your page’s JS file, then defining your code in a WinJS namespace is a great way to do it.
Check out the following definition…
Now we’re cooking with Crisco! Now we are good citizens and we have the ability to architect our application in a way that is consistent and sensible and logical.
Now you know where your code should go when you’re writing a Windows 8 app to make sure it’s available where you need it and no further.
Make sure you follow me on Twitter (@codefoster) if you want more tips and tricks with Windows 8 as well as other musings that at least I would consider pertinent and helpful. Happy coding.