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• ControlChannelTrigger StreamSocket sample • ControlChannelTrigger XmlHttpRequest sample • ControlChannelTrigger StreamWebSocket sample • ControlChannelTrigger HTTP client sample Loose Ends (or Some Samples To Go) Although we’ve covered quite a bit of territory in this chapter, you might find some additional samples helpful in your networking efforts. I won’t address these topics further in this book, but this list will at least help you be aware of their existence. Sample Check if current session is remote sample HomeGroup app sample Remote desktop app container client sample RemoteApp and desktop connections workspace API sample SMS message send, receive, and SIM management sample SMS background task sample USSD message management sample Description (from the Windows Developer Center) This sample demonstrates the use of Windows.System.RemoteDesktop API. Specifically, this sample demonstrates how to use the InteractiveSession.IsRemote property to determine if the current session is a remote session. Demonstrates how to use a HomeGroup to open, search, and share files. This sample uses some of the HomeGroup options. In particular, it uses Windows.Storage.- Pickers.PickerLocationId enumeration and the Windows.Storage.- KnownFolders.homeGroup property to select files contained in a HomeGroup. Demonstrates how to use the Remote Desktop app container client objects in an app. Demonstrates how to use the WorkspaceBrokerAx object in a Windows 8 app. Demonstrates how to use the Windows 8 Mobile Broadband SMS API (Windows.Devices.Sms). This API can be used only from mobile broadband device apps and is not available to apps generally. Demonstrates how to use the Windows 8 Mobile Broadband SMS API (Windows.-Devices.Sms) with the Background Task API (Windows.ApplicationModel.-Background) to send and receive SMS text messages. This API can be used only from mobile broadband device apps and is not available to apps generally. Demonstrates network account management using the USSD protocol with GSM-capable mobile broadband devices. USSD is typically used for account management of a mobile broadband profile by the Mobile Network Operator (MNO). USSD messages are specific to the MNO and must be chosen accordingly when used on a live network. [That sample is applicable only to those building mobile broadband device apps; it draws on the API in Windows.Networking.NetworkOperators.] 688
What We’ve Just Learned • Networks come in a number of different forms, and separate capabilities in the manifest specifically call out Internet (Client), Internet (Client & Server), and Private Networks (Client & Server). Local loopback within these is normally blocked for apps but may be used for debugging purposes on machines with a developer license. • Rich network information is available through the Windows.Networking.Connectivity.- NetworkInformation API, including the ability to track connectivity, be aware of network costs, and obtain connection profile details. • Connectivity can be monitored from a background task by using the networkStateChange trigger and conditions such as internetAvailable and internetNotAvailable. • The ability to run offline can be an important consideration that can make an app much more attractive to customers. Apps need to design and implement such features themselves, using local or temporary app data folders to store the necessary caches. • Windows.Networking.BackgroundTransfer provides for cost-aware downloads and up-loads that continue to run while an app is suspended and that are easy to resume if an app is restarted after termination. Using this API is highly recommended over doing the same with XmlHttpRequests; the API supports credentials, multipart uploads, cost policy, and grouping. • The Credential Picker UI provides a built-in UI for collecting credentials, and the credential locker provides a secure means for storing and retrieving those credentials (that can also be roamed to the user’s other trusted devices if they allow it). • Apps can authenticate through OAuth providers using the web authentication broker API. This allows apps to obtain necessary access keys and tokens to work with those providers while never having to manage user credentials directly. • For authentication providers that support it, apps can use single sign on so that authenticating the user in one app will authenticate them in all others using the same provider. The Live SDK/Live Connect provides for this with the user’s Microsoft account. • Apps can obtain and manage some of the user’s profile data, including the user image and the lock screen image. • WinRT provides APIs for encryption and decryption, along with certificates. • The Windows.Web.Syndication API provides a structured way to consume RSS feeds, and Windows.Web.AtomPub provides a structured way to post, edit, and manage entries. • Socket support in WinRT includes datagram and stream sockets, as well as message and stream WebSockets. The capabilities of the latter expand on the capabilities of W3C WebSockets by supporting both a streaming (TCP) model and binary content. 689
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Table of Contents Introduction ....
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WinJS Tools for Pages and Page Navi
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Chapter 6: Layout .................
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Design Guidelines for Settings ....
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Manipulating Audio and Video ......
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Managing Secondary Tiles ..........
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The User Profile (and the Lock Scre
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The Windows Store APIs ............
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Introduction Welcome, my friends, t
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I'm also assuming that your interes
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Acknowledgements In many ways, this
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Support for developers, however, ca
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technologies, including DirectX, XA
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The upload process will walk you th
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FIGURE 1-2 A typical app page in th
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do this, I’m sure!). In a hotel,
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The app host is more or less Intern
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Sidebar: Mixed Language Apps Window
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When snapped, on the other hand, ap
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Capability Description Prompts for
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Taking a Break, Getting Some Rest:
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So you might say, “Well, I should
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that the user has to configure the
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Fortunately, the Windows Store dash
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graphics called for in the design s
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4. After Visual Studio churns for a
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Add-AppxDevPackage. That batch file
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package, whereas a single / refers
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QuickStart #1: Here My Am! and an I
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FIGURE 2-8 Snapped wireframe (left;
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which we’ll instantiate a Bing ma
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orientation, screen resolution, and
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FIGURE 2-12 Full-screen landscape v
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What this means is that, for the mo
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Create the map (though the namespac
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Next, in the second parameter to po
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FIGURE 2-17 Setting the Location ca
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Here we’re providing capturePhoto
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the contract is an abstraction that
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Extra Credit: Receiving Messages fr
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Note that such apps might not be ab
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Chapter 3 App Anatomy and Page Navi
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content and controls from web servi
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Such capabilities are blocked becau
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Can you do any kind of dynamic page
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appdata. This happens via Windows.S
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I don’t know about you, but I rea
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telling you to not use it! After al
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App Activation First, let me congra
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In the table, note that 80% scale t
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Activation Code Paths As we saw in
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splashScreen SplashScreen Contains
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In truth, so long as the user keeps
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Of course, setPromise ultimately do
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previousExecutionState values are d
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object to which you can add whateve
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Because we stored lastPosition in s
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FIGURE 3-9 The output of the Simple
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What about launching from the previ
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For all other details on this funct
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The Navigation App Template, PageCo
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(function () { "use strict"; WinJS.
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}, ); if (that.pageElement.winContr
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Sidebar: Helping Out IntelliSense I
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thousands of items, where tapping a
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Completing the Promises Story Whew!
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mechanism on top of singular XHR op
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The story of controls in Windows 8
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Creating or instantiating HTML cont
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Hyperlink href, target Link text L
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defined as part of the WinJS.UI nam
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Clearly, then, the bulk of the work
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var element = document.getElementBy
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This example is taken directly from
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FIGURE 4-7 Expanding a WinJS contro
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Flexbox -ms-[inline-]flexbox (value
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Note Though not shown here, you can
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For the ToggleSwitch, win-* classes
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• If a WinJS.UI.Tooltip is gettin
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Custom Control Examples To see thes
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Between calendar.js and calendar.cs
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]]> Whe
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This would be appropriate if you cr
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Two-way: essentially one-way bindin
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The code for this can be found in T
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Sidebar: Data-Binding Properties of
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Implementing Two-Way Binding To imp
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• oneTime A function that just lo
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• Windows 8 apps have rich stylin
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Collection Control Basics To seek t
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indingList: bindingList, array: arr
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Now while the ListView control in S
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The header template in html/scenari
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In the modified sample I changed na
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} return groupCompareGlobalized(lef
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a function instead of a declarative
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var list = new WinJS.Binding.List()
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data-win-options="{ itemDataSource:
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e used anywhere it’s appropriate,
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If you were to provide your own nav
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sample code in this chapter’s com
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Because of data binding, changes to
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What is does have, however, is this
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What you then do inside the element
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• The groups themselves are all s
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and the current viewable area. Thou
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Styling Following the precedent of
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Technically speaking, the layout pr
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or you can set layout.groupInfo fro
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Using the first item’s dimension
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You can set a breakpoint in this fu
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Incremental Loading Apart from pote
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The yellow bars indicate execution
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If it’s not provided (as when the
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During initialization (outside the
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Chapter 6 Layout Compared to other
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that appear when needed through app
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Within the body of content, then, W
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} -ms-grid-columns: 120px 2fr 80px
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-ms-scroll-snap-x Shorthand to comb
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WinRT: filled -ms-view-state: fille
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Handling View States As I just ment
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var mql = window.matchMedia("(-ms-v
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individual items in snapped view. B
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FIGURE 6-5 Options for display size
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If your developer sensibilities obj
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Content goes here This is really
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Such a layout is most easily achiev
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Because the specs themselves are st
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/* In CSS */ #divMain { width: 100%
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CSS styles that are supported for W
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Within the activated handler docume
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Multicolumn Elements and Regions Tr
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FIGURE 6-9 CSS region chains to flo
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Chapter 7 Commanding UI For consume
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• Commands that can’t be placed
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which provide many specifics on pla
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Tip To prevent the app bar from app
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This example doesn’t provide any
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var appbar = document.getElementByI
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• afterhide occurs immediately af
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This button’s click handler uses
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In the extraClass properties we’v
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To provide graphics of your own, do
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It should come as no surprise by
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Flyouts and Menus Going back to our
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are optional with show. (Note also
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function confirmOrder() { bought =
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The point of this last example is t
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Also, go into css/header-menu.c
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In the contextmenu handler menu.sho
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Scenario 3 is identical to Scenario
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The app bar now appears as follows,
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This message will appear if the use
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Chapter 8 State, Settings, Files, a
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while our permanent home was being
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• Account and profile configurati
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By the way, you might have some rea
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var localSettings = Windows.Storage
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It is also possible to migrate app
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Tip There are some file extensions
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Sidebar: Closing Streams vs. Closin
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Using App Data APIs for State Manag
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efore setting up new defaults. As m
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Roaming State The automatic roaming
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good idea to not be too aggressive
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Each app-supplied command can do on
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There are two ways to implement thi
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function helpCommandInvoked(e) { va
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Programmatically Invoking Settings
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Sidebar: Changes to Permissions A c
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Think about this for a moment (as I
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eturns an appropriate StorageFile o
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function pickSinglePhoto() { // Ver
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When picking multiple files, the re
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indicate a new filename in which to
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scenario oriented on the music libr
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A QueryOptions is generally created
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The setPropertyPrefetch method goes
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What We’ve Just Learned • State
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Chapter 9 Input and Sensors Touch i
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• Second, when you need to handle
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One or more fingers touch the scree
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You might notice a conspicuous abse
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Note that this method has no effect
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• TouchCapabilities Properties ar
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Tip Pointer events won’t fire if
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Properties Description currentPoint
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The first step to receiving gesture
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• MSGestureHold occurs when MSPoi
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FIGURE 9-3 A conceptual representat
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FIGURE 9-4 The Input Instantiable G
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obviously a specific deceleration m
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• Process keydown, keyup, and key
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For passwords you get a key to hide
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keyboard sample. 50 Adding listener
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Standard Keystrokes The last piece
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FIGURE 9-9 The Input Ink sample wit
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(string), and timestamp (Date) prop
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Like all other WinRT APIs, however,
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Here’s an example of such code fr
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Chapter 10 Media To say that media
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movie.controls = true; document.get
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declared inline, created dynamicall
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} document.getElementById("r").styl
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function onImageError(source) { sou
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• By copying pixel data from a vi
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It’s also helpful to understand t
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Video Element Extension APIs Beyond
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vid.msInsertVideoEffect("GrayscaleT
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elements with the same source. The
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in the background. As a developer,
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function soundLevelChanged() { //Ca
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Playing Sequential Audio An app tha
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need to bypass the audio element an
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To guarantee the ordering we use Pr
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Thumbnails First, StorageFile.getTh
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or combination of System.GPS.Longit
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} return degrees + "°" + minutes +
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Most of the displayImageUI function
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provides a specific BitmapEncoder i
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method can be called only once and
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Transcoding and Custom Image Format
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Transcoding happens either from one
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In Scenario 2, the sample always us
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Media Capture There are times when
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ecordLimitationExceeded Fired when
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} captureInitSettings.videoDeviceId
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} // Add the devices to deviceList
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Streaming from a Server and Digital
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Here’s how such apps generally wo
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Next you’ll want to wire up handl
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• WinRT provides a rich API for m
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necessary. In this way, excessive a
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The Control Panel setting can be ob
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screen; the Panel animations are fo
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want to chain or synchronize animat
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Create addToList animation. var add
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CSS Animations and Transitions As n
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Animations work in an opposite mann
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Keyframes, while typically defined
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FIGURE 11-2 Output of Scenario 3 of
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What’s more, requestAnimationFram
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Still, 20% is a lot of CPU power to
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Chapter 12 Contracts Recently I dis
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File activation (file type associat
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more specific. For instance, when a
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var dataPackageTitle = document.get
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The other interesting part of Scena
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When sharing an image, don't forget
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FIGURE 12-3 The Share content targe
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• Acknowledge user actions when y
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The key here is the args.detail.sha
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target app. If you’re using image
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FIGURE 12-7 Controls to create a qu
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The question is how to wire up comm
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The Search contract that makes this
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FIGURE 12-11 The Search declaration
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} } })); In the search activation p
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} }); Windows.ApplicationModel.Sear
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The request object also has a getDe
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Type to Search The final feature of
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egistered for that type, rather tha
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At the very bottom of this UI you c
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ecord a new sound. In such cases, h
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Activation of a File Picker Provide
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Windows.ApplicationModel.Activation
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A final note is that a file picker
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}; // Create a file to provide back
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The next step for the provider is t
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FIGURE 12-18 The provider sample’
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FIGURE 12-21 The provider sample’
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• If the UI status is visible, sw
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Just as the file picker contract al
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Using the Contact Picker Contacts a
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} } }); Contact Picker Providers On
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As you can see, the homeEmail field
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Chapter 13 Tiles, Notifications, th
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FIGURE 13-1 The typical default Sta
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Selecting an item on the Start scre
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In many ways, live tiles might redu
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toss up lots of superfluous toast,
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Yet Windows doesn’t want to force
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The third way an app can issue upda
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Providing both square and wide stat
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• arguments A string that’s pas
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function activated(eventObject) { i
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16 or fewer characters that is used
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Third, if you supply an image that
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arrive on a Windows 8 machine will
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The Notifications Extensions Librar
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The other bits of the manifest that
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In such cases it would be better to
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Windows.UI.Notifications.BadgeUpdat
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you’d use start time), or the pha
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Tip The tile and badge updaters are
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eturned from page requests, as we
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through the Web platform installer.
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Toast Notifications So far in this
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FIGURE 13-16 Issuing text toasts th
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supports addImageQuery for scale, l
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A scheduled toast is created using
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To update a tile, set a badge, or i
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Your app should go through this sho
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matter of sending an XmlHttpRequest
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In the running app, the pushnotific
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Background Tasks and Lock Screen Ap
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FIGURE 13-18 The manifest editor fo
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In this code, the BackgroundTaskBui
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var internetCondition = new backgro
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The Background task sample provides
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Note Working with the lock screen i
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Debugging Background Tasks By this
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• Periodic updates for tiles and
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Network Information and Connectivit
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networkstatuschanged event that we
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Note Windows Store apps written in
Page 637 and 638: Programmatically, as noted before,
Page 639 and 640: Although this option will not set u
Page 641 and 642: hundred kilobytes—if you know fro
Page 643 and 644: Finally, avoid using XHR for large
Page 645 and 646: Starting a download transfer happen
Page 647 and 648: There is also a variation of create
Page 649 and 650: operations—it is possible to crea
Page 651 and 652: ); "form-data", "------------------
Page 653 and 654: Basically, you would change the pol
Page 655 and 656: Authentication, Credentials, and th
Page 657 and 658: The result from pickAsync, as given
Page 659 and 660: To clarify the relationship between
Page 661 and 662: There is one subtle difference betw
Page 663 and 664: Within the web authentication broke
Page 665 and 666: https://www.facebook.com/dialog/oau
Page 667 and 668: Single Sign On with Live Connect Be
Page 669 and 670: setAccountPicturesAsync (for provid
Page 671 and 672: And lastly it’s worth at least li
Page 673 and 674: } var scenario1Link = document.getE
Page 675 and 676: } return currentFeed.items[currentI
Page 677 and 678: When data arrives, the handler rece
Page 679 and 680: } // This is a helper function echo
Page 681 and 682: On the client side, StreamSocket ag
Page 683 and 684: And closing the socket in Scenario
Page 685 and 686: In the sample, we first create a Me
Page 687: } try { var size = dataWriter.measu
Page 691 and 692: • Connecting with devices in the
Page 693 and 694: The XInput and JavaScript controlle
Page 695 and 696: function renderLoop() { var state =
Page 697 and 698: FIGURE 15-3 Sample device enumerati
Page 699 and 700: The Removable Storage sample, in Sc
Page 701 and 702: • Communications are supported on
Page 703 and 704: Advertising a Connection Making you
Page 705 and 706: Tap to Connect and Tap to Activate
Page 707 and 708: On a simpler note, publishing a URI
Page 709 and 710: FIGURE 15-5 Scenario 2 of the Print
Page 711 and 712: Print Document Sources No matter wh
Page 713 and 714: If you don’t add a handler for th
Page 715 and 716: The final bit to mention in the cod
Page 717 and 718: Indeed, when we speak of mixed lang
Page 719 and 720: Again, components can also make use
Page 721 and 722: Sidebar: WinRT Components vs. Class
Page 723 and 724: Once you add the name of a class an
Page 725 and 726: With the basic mechanics worked out
Page 727 and 728: As we did with C#, let’s start by
Page 729 and 730: Comparing the Results The Image Man
Page 731 and 732: } return sum; Running a count with
Page 733 and 734: Component Implementation • When c
Page 735 and 736: When this worker is started, the on
Page 737 and 738: FIGURE 16-4 A promise manages and i
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Note that Task.Run does not support
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As with C#, there are additional st
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public IAsyncOperation ConvertPixel
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method called ConvertGrayscalFileAs
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Event names, on the other hand, are
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One challenge, as we saw in the qui
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The Building your own Windows Runti
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• Check against an encrypted lice
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Chapter 17 Apps for Everyone: Acces
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Your App, Your Business If you chec
Page 759 and 760:
FIGURE 17-1 Creating an app package
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desktop applications and distribute
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means is that if you want to promot
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You should also strongly consider m
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• In-app purchases through the Wi
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That said, WinRT provides for the f
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When your app accesses CurrentAppSi
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} }); currentApp.licenseInformation
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You won’t hit your breakpoint imm
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If you’re using a custom commerce
Page 779 and 780:
You might have noticed that a Produ
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Id=\"e2a62d42-dbca-43d2-b779-66eb91
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The latter two we’ve already cove
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• aria-label Directly provides te
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Apart from the small bits of code i
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control sample, and switch between
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Scenario 2 shows similar effects wi
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Canvas a better choice? To this poi
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one resource. For a few examples of
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addition of new string and image re
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FIGURE 17-9 Control panel dialogs f
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Formatting Culture-Specific Data an
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Sorting and Grouping Just as a worl
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With images, you can reverse them w
Page 807 and 808:
Note CSS files can contain string l
Page 809 and 810:
Manifest: Let’s turn now to the m
Page 811 and 812:
Other affected files in this app in
Page 813 and 814:
Sidebar: String Resources in Settin
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the folder name itself doesn’t us
Page 817 and 818:
If you like, you can just send your
Page 819 and 820:
FIGURE 17-11 The Multilingual App T
Page 821 and 822:
Second, the Toolkit will detect if
Page 823 and 824:
Localization Wrap-Up Well, we’re
Page 825 and 826:
Let me say that again: all of this
Page 827 and 828:
Onboarding and Working through Reje
Page 829 and 830:
Connecting Your Website If you have
Page 831 and 832:
What We’ve Just Learned • An ap
Page 833:
What do you think of this book? We
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