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FIGURE 15-5 Scenario 2 of the Print sample shows a typical app with something ready to print.<br />
FIGURE 15-6 The Devices charm when an app has available print content (left) and when it doesn’t (right).<br />
709
Sometimes I wonder whether the idea of the paperless office wasn’t fueled in part by the fact that many apps didn’t implement printing very well, an artifact of it being a difficult task to begin with. (And then there were printer drivers of dubious quality, connection difficulties, and many other challenges.) But gradually the whole world of printing has improved, both for consumers and for developers. Of course, printing isn’t always about going to paper either. I frequently use a <strong>PDF</strong> “printer” to create read-only copies of documents that are more suitable to sharing in many cases than my originals. Occasionally I print to a fax machine (which sends a fax), and more occasionally I’ll print an email or web page directly to Microsoft OneNote for filing. In fact, I highly recommend setting your default printer to a digital target of some kind when working on printing features in your own app. That way you’ll avoid producing copious amounts of scratch paper in the process, unless you happen to own a tree farm that you’ll be thinning in a couple of years! Get the backstory If you want to know more about how printing as a whole has been reimagined, check out Simplifying printing in Windows 8 on the Building Windows 8 Blog, a post that provides deep soul satisfaction knowing that there are fewer drivers in your printing future. To understand how to implement printing in an app, let’s first see what it looks like to the user. Then we’ll see how to ready content for printing and how to handle the printing-related events from Windows. Note A Windows Store app written in JavaScript can use the window.print method to print with default settings. It’s not recommended, however, because it doesn’t work with the print UI and doesn’t always produce the best output. Windows Store apps should give the user the full Windows 8 experience as described here. The Printing User Experience Printing typically starts in an app where the user is looking at something they want to print and invokes an appropriate command. In Scenario 2 of the Print sample, for instance, whose code we’ll be looking at in the next section, we see a big block of content along with a Print button, as shown in Figure 15-5. Note that such a Print button would normally be on the app bar and not on the app canvas, but this is a sample. To start printing, the user can either tap this Print button or open the Charms bar and select Devices. Either way, if the app is registered for printing—that is, it’s listening for the event that’s raised from the Devices charm and provides suitable content—the user will see a list of print targets, as shown on the left side of Figure 15-6. If the app doesn’t have printable content (that is, it doesn’t listen for the event or provides no content in response), the user will see a panel like that on the right side of Figure 15-6. This is very much the same experience that a user sees with the Share charm depending on whether the app provides data for that feature. You’ve likely seen the epic fail message of “This app can’t share.” Printing supplies a similar disappointment for apps that lack the capability. Don’t let your app be one of them. 708
FIGURE 15-5 Scenario 2 of the Print sample shows a typical app with something ready to print. FIGURE 15-6 The Devices charm when an app has available print content (left) and when it doesn’t (right). 709
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1 99
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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
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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
- Page 657 and 658: The result from pickAsync, as given
- Page 659 and 660: To clarify the relationship between
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- Page 663 and 664: Within the web authentication broke
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- Page 667 and 668: Single Sign On with Live Connect Be
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- Page 673 and 674: } var scenario1Link = document.getE
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- Page 683 and 684: And closing the socket in Scenario
- Page 685 and 686: In the sample, we first create a Me
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- Page 689 and 690: What We’ve Just Learned • Netwo
- 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: On a simpler note, publishing a URI
- 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
- Page 739 and 740: Note that Task.Run does not support
- Page 741 and 742: As with C#, there are additional st
- Page 743 and 744: public IAsyncOperation ConvertPixel
- Page 745 and 746: method called ConvertGrayscalFileAs
- Page 747 and 748: Event names, on the other hand, are
- Page 749 and 750: One challenge, as we saw in the qui
- Page 751 and 752: The Building your own Windows Runti
- Page 753 and 754: • Check against an encrypted lice
- Page 755 and 756: Chapter 17 Apps for Everyone: Acces
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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
- Page 809 and 810:
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
- Page 819 and 820:
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
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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
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What We’ve Just Learned • An ap
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What do you think of this book? We
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