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The MSGestureChange handler for each individual piece (onGestureChange) then takes all the translation, rotation, and scaling data in the eventArgs object and applies them with CSS. This shows how convenient it is that all those properties are already reported in the coordinate space we need: function onGestureChange(e) { var elt = e.target; var m = new MSCSSMatrix(elt.style.msTransform); } elt.style.msTransform = m. translate(e.offsetX, e.offsetY). translate(e.translationX, e.translationY). rotate(e.rotation * 180 / Math.PI). scale(e.scale). translate(-e.offsetX, -e.offsetY); There’s a little more going on in the sample, but what we’ve shown here are the important parts. Clearly, if you didn’t want to support certain kinds of manipulations, you’d again simply ignore certain properties in the event args object. Scenario 2 of this sample has the same output but is implemented a little differently. As you can see in its initialize function (js/gesture.js), the only events that are initially registered apply to the entire “table top” that contains the black background and a surrounding border. Gesture objects for the individual pieces are created and attached to a pointer within the MSPointerDown event (onTableTopPointerDown). This approach is much more efficient and scalable to a puzzle app that has hundreds or even thousands of pieces, as gesture objects are held only for as long as a particular piece is being manipulated. Those manipulations are also like those of Scenario 1, where all the MSGestureChange properties are applied through a CSS transform. For further details, refer to the code comments in js/gesture.js, as they are quite extensive. Scenario 3 of this sample provides another demonstration of performing translate, pinch-stretch, and rotate gestures using the mouse wheel. As shown in the PointerEvents example, the only thing you need to do here is process the wheel event, set eventArgs.pointerId to 1, and pass that onto your MSPointerDown handler that then adds the pointer to the gesture object: elt.addEventListener("wheel", onMouseWheel, false); function onMouseWheel(e) { e.pointerId = 1; // Fixed pointerId for MouseWheel onPointerDown(e); } Again, that’s all there is to it. (I love it when it’s so simple!) As an exercise, you might try adding this little bit of code to Scenarios 1 and 2 as well. The Gesture Recognizer With inertial gestures, which continue to send some number of MSGestureChange events after pointers are released, you might be asking this question: What, exactly, controls those events? That is, there is 386
obviously a specific deceleration model built into those events, namely the one around which the Windows look and feel is built. But what if you want a different behavior? And what if you want to interpret pointer events in different way altogether? The agent that interprets pointer events into gesture events is called the gesture recognizer, which you can get to directly through the Windows.UI.Input.GestureRecognizer object. After instantiating this object with new, you then set its gestureSettings properties for the kinds of manipulations and gestures you’re interested in. The documentation for Windows.UI.Input.GestureSettings gives all the options here, which include tap, doubleTap, hold, holdWithMouse, rightTap, drag, translations, rotations, scaling, inertia motions, and crossSlide (swipe). For example, in the Input manipulations and gestures sample (ballineight.js) we can see how it configures a recognizer for tap, rotate, translate, and scale (with inertia): gr = new Windows.UI.Input.GestureRecognizer(); // Configuring GestureRecognizer to detect manipulation rotation, translation, scaling, // + inertia for those three components of manipulation + the tap gesture gr.gestureSettings = Windows.UI.Input.GestureSettings.manipulationRotate | Windows.UI.Input.GestureSettings.manipulationTranslateX | Windows.UI.Input.GestureSettings.manipulationTranslateY | Windows.UI.Input.GestureSettings.manipulationScale | Windows.UI.Input.GestureSettings.manipulationRotateInertia | Windows.UI.Input.GestureSettings.manipulationScaleInertia | Windows.UI.Input.GestureSettings.manipulationTranslateInertia | Windows.UI.Input.GestureSettings.tap; // Turn off UI feedback for gestures (we'll still see UI feedback for PointerPoints) gr.showGestureFeedback = false; The GestureRecognizer also has a number of properties to configure those specific events. With cross-slides, for example, you can set the crossSlideThresholds, crossSlideExact, and crossSlideHorizontally properties. You can set the deceleration rates (in pixels/ms 2 ) through inertiaExpansionDeceleration, inertiaRotationDeceleration, and inertiaTranslation-Deceleration. Once configured, you then start passing MSPointer* events to the recognizer object, specific to its methods named processDownEvent, processMoveEvents, and processUpEvent (also processMouseWheelEvent, and processInertia, if needed). In response, depending on the configuration, the recognizer will then fire a number of its own events. First, there are discrete events like crossSliding, dragging, holding, rightTapped, and tapped. For all others it will fire a series of manipuationStarted, manipulationUpdated, manipulationInertiaStarting, and manipulationCompleted events. Note that all of these come from WinRT to be sure to call removeEventListener as needed. When you’re using the recognizer directly, in other words, you’ll be listening for MSPointer* events, feeding them to the recognizer, and then listening for and acting on the recognizer’s specific events as above rather than the MSGesture* events that come out of the default recognizer configured by the MSGesture object. 387
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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
Page 335 and 336: Each app-supplied command can do on
Page 337 and 338: There are two ways to implement thi
Page 339 and 340: function helpCommandInvoked(e) { va
Page 341 and 342: Programmatically Invoking Settings
Page 343 and 344: Sidebar: Changes to Permissions A c
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Page 347 and 348: eturns an appropriate StorageFile o
Page 349 and 350: function pickSinglePhoto() { // Ver
Page 351 and 352: When picking multiple files, the re
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Page 355 and 356: scenario oriented on the music libr
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Page 359 and 360: The setPropertyPrefetch method goes
Page 361 and 362: What We’ve Just Learned • State
Page 363 and 364: Chapter 9 Input and Sensors Touch i
Page 365 and 366: • Second, when you need to handle
Page 367 and 368: One or more fingers touch the scree
Page 369 and 370: You might notice a conspicuous abse
Page 371 and 372: Note that this method has no effect
Page 373 and 374: • TouchCapabilities Properties ar
Page 375 and 376: Tip Pointer events won’t fire if
Page 377 and 378: Properties Description currentPoint
Page 379 and 380: The first step to receiving gesture
Page 381 and 382: • MSGestureHold occurs when MSPoi
Page 383 and 384: FIGURE 9-3 A conceptual representat
Page 385: FIGURE 9-4 The Input Instantiable G
Page 389 and 390: • Process keydown, keyup, and key
Page 391 and 392: For passwords you get a key to hide
Page 393 and 394: keyboard sample. 50 Adding listener
Page 395 and 396: Standard Keystrokes The last piece
Page 397 and 398: FIGURE 9-9 The Input Ink sample wit
Page 399 and 400: (string), and timestamp (Date) prop
Page 401 and 402: Like all other WinRT APIs, however,
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Page 405 and 406: Chapter 10 Media To say that media
Page 407 and 408: movie.controls = true; document.get
Page 409 and 410: declared inline, created dynamicall
Page 411 and 412: } document.getElementById("r").styl
Page 413 and 414: function onImageError(source) { sou
Page 415 and 416: • By copying pixel data from a vi
Page 417 and 418: It’s also helpful to understand t
Page 419 and 420: Video Element Extension APIs Beyond
Page 421 and 422: vid.msInsertVideoEffect("GrayscaleT
Page 423 and 424: elements with the same source. The
Page 425 and 426: in the background. As a developer,
Page 427 and 428: function soundLevelChanged() { //Ca
Page 429 and 430: Playing Sequential Audio An app tha
Page 431 and 432: need to bypass the audio element an
Page 433 and 434: To guarantee the ordering we use Pr
Page 435 and 436: 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
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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 =
Page 697 and 698:
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
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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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