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layouts provided by one of the more complex templates. At the same time, the silhouette is a starting point and not a requirement—apps can and do depart from it when it makes sense. Absent a clear design, however, it’s best to stay with it. Enough said! Let’s just assume that we have a great design to work from and our designers are off sipping cappuccino, satisfied with a job well done. Our job is how to then execute on that great design. Create the Markup For the purposes of markup, layout, and styling, one of the most powerful tools you can add to your arsenal is Blend for Visual Studio. As you may know, Blend has been available (at a high price) to designers and developers working with XAML (the presentation framework that is used by apps written in C#, Visual Basic, and C++). Now Blend is free and also supports HTML, CSS, and JavaScript. I emphasize that latter point because it doesn’t just load markup and styles: it loads and executes your code, right in the “Artboard” (the design surface), because that code so often affects the DOM, styling, and so forth. Then there’s Interactive Mode…but I’m getting ahead of myself! Blend and Visual Studio are very much two sides of a coin: they share the same project file formats and have commands to easily switch between them, depending on whether you’re focusing on design or development. To demonstrate that, let’s actually start building Here My Am! in Blend. As we did before with Visual Studio, launch Blend, select New Project…, and select the Blank App template. This will create the same project structure as before. (Note: Video 2-2 shows all these steps together.) Following the practice of writing pure markup in HTML—with no styling and no code, and even leaving off a few classes we’ll need for styling—let’s drop the following markup into the body element of default.html (replacing the one line of Content goes here): Here My Am! Photo Location Here we see the five elements in the wireframe: a main header, two subheaders, a space for a photo (defaulting to an image with “tap here” instructions), and an iframe that specifically houses a page in 62
which we’ll instantiate a Bing maps web control. 9 You’ll see that some elements have style classes assigned to them. Those that start with win come from the WinJS stylesheet. 10 You can browse these in Blend by using the Style Rules tab, shown in Figure 2-9. Other styles like titlearea, pagetitle, and group-title are meant for you to define in your own stylesheet, thereby overriding the WinJS styles for particular elements. FIGURE 2-9 In Blend, the Style Rules tab lets you look into the WinJS stylesheet and see what each particular style contains. Take special notice of the search bar under the tabs. This is here so you don’t waste your time visually scanning for a particular style—just start typing in the box, and let the computer do the work! The page we’ll load into the iframe, map.html, is part of our app package that we’ll add in a moment, but note how we reference it. The ms-appx-web:/// protocol indicates that the iframe and its contents will run in the web context (introduced in Chapter 1), thereby allowing us to load the remote script for the Bing maps control. The triple slash, for its part—or more accurately the third slash—is shorthand for “the current app package” (a value that you can obtain from document.location.host), so we don’t need to create an absolute URI for in-package content. To indicate that a page should be loaded in the local context, the protocol is just ms-appx://. It’s important to remember that no script is shared between these contexts (including variables and functions), relative paths stay in the same context, and communication between the two goes through the HTML5 postMessage function, as we’ll see later. All of this prevents an arbitrary website from driving 9 If you’re following the steps in Blend yourself, the taphere.png image should be added to the project in the images folder. Right-click that folder, select Add Existing Item, and then navigate to the complete sample’s images folder and select taphere.png. That will copy it into your current project. 10 The two standard stylesheets are ui-dark.css and ui-light.css. Dark styles are recommended for apps that deal with media, where a dark background helps bring out the graphical elements. We’ll use this stylesheet because we’re doing photo capture. The light stylesheet is recommended for apps that work more with textual content. 63
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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 ....
Page 11 and 12: Manipulating Audio and Video ......
Page 13 and 14: Managing Secondary Tiles ..........
Page 15 and 16: The User Profile (and the Lock Scre
Page 17 and 18: The Windows Store APIs ............
Page 19 and 20: Introduction Welcome, my friends, t
Page 21 and 22: I'm also assuming that your interes
Page 23 and 24: Acknowledgements In many ways, this
Page 25 and 26: Support for developers, however, ca
Page 27 and 28: technologies, including DirectX, XA
Page 29 and 30: The upload process will walk you th
Page 31 and 32: FIGURE 1-2 A typical app page in th
Page 33 and 34: do this, I’m sure!). In a hotel,
Page 35 and 36: The app host is more or less Intern
Page 37 and 38: Sidebar: Mixed Language Apps Window
Page 39 and 40: When snapped, on the other hand, ap
Page 41 and 42: Capability Description Prompts for
Page 43 and 44: Taking a Break, Getting Some Rest:
Page 45 and 46: So you might say, “Well, I should
Page 47 and 48: that the user has to configure the
Page 49 and 50: Fortunately, the Windows Store dash
Page 51 and 52: graphics called for in the design s
Page 53 and 54: 4. After Visual Studio churns for a
Page 55 and 56: Add-AppxDevPackage. That batch file
Page 57 and 58: package, whereas a single / refers
Page 59 and 60: QuickStart #1: Here My Am! and an I
Page 61: FIGURE 2-8 Snapped wireframe (left;
Page 65 and 66: orientation, screen resolution, and
Page 67 and 68: FIGURE 2-12 Full-screen landscape v
Page 69 and 70: What this means is that, for the mo
Page 71 and 72: Create the map (though the namespac
Page 73 and 74: Next, in the second parameter to po
Page 75 and 76: FIGURE 2-17 Setting the Location ca
Page 77 and 78: Here we’re providing capturePhoto
Page 79 and 80: the contract is an abstraction that
Page 81 and 82: Extra Credit: Receiving Messages fr
Page 83 and 84: Note that such apps might not be ab
Page 85 and 86: Chapter 3 App Anatomy and Page Navi
Page 87 and 88: content and controls from web servi
Page 89 and 90: Such capabilities are blocked becau
Page 91 and 92: Can you do any kind of dynamic page
Page 93 and 94: appdata. This happens via Windows.S
Page 95 and 96: I don’t know about you, but I rea
Page 97 and 98: telling you to not use it! After al
Page 99 and 100: App Activation First, let me congra
Page 101 and 102: In the table, note that 80% scale t
Page 103 and 104: Activation Code Paths As we saw in
Page 105 and 106: splashScreen SplashScreen Contains
Page 107 and 108: In truth, so long as the user keeps
Page 109 and 110: Of course, setPromise ultimately do
Page 111 and 112: 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
Page 517 and 518:
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
Page 607 and 608:
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
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Programmatically, as noted before,
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Although this option will not set u
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hundred kilobytes—if you know fro
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Finally, avoid using XHR for large
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Starting a download transfer happen
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There is also a variation of create
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operations—it is possible to crea
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); "form-data", "------------------
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Basically, you would change the pol
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Authentication, Credentials, and th
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The result from pickAsync, as given
Page 659 and 660:
To clarify the relationship between
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There is one subtle difference betw
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Within the web authentication broke
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https://www.facebook.com/dialog/oau
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Single Sign On with Live Connect Be
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setAccountPicturesAsync (for provid
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And lastly it’s worth at least li
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} var scenario1Link = document.getE
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} return currentFeed.items[currentI
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When data arrives, the handler rece
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} // This is a helper function echo
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On the client side, StreamSocket ag
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And closing the socket in Scenario
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In the sample, we first create a Me
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} try { var size = dataWriter.measu
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What We’ve Just Learned • Netwo
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• Connecting with devices in the
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The XInput and JavaScript controlle
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function renderLoop() { var state =
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FIGURE 15-3 Sample device enumerati
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The Removable Storage sample, in Sc
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• Communications are supported on
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Advertising a Connection Making you
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Tap to Connect and Tap to Activate
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On a simpler note, publishing a URI
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FIGURE 15-5 Scenario 2 of the Print
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Print Document Sources No matter wh
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If you don’t add a handler for th
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The final bit to mention in the cod
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Indeed, when we speak of mixed lang
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Again, components can also make use
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Sidebar: WinRT Components vs. Class
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Once you add the name of a class an
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With the basic mechanics worked out
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As we did with C#, let’s start by
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Comparing the Results The Image Man
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} return sum; Running a count with
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Component Implementation • When c
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When this worker is started, the on
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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
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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
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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
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Note CSS files can contain string l
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Manifest: Let’s turn now to the m
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Other affected files in this app in
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Sidebar: String Resources in Settin
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the folder name itself doesn’t us
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If you like, you can just send your
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FIGURE 17-11 The Multilingual App T
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Second, the Toolkit will detect if
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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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