MICROSOFT_PRESS_EBOOK_PROGRAMMING_WINDOWS_8_APPS_WITH_HTML_CSS_AND_JAVASCRIPT_PDF

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App Bar Events and Methods ............................................................................................................................................ 282 Showing, Hiding, Enabling, and Updating Commands ............................................................................................ 284 App Bar Styling ........................................................................................................................................................................ 287 Custom Icons ........................................................................................................................................................................... 288 Command Menus ................................................................................................................................................................... 290 Custom App Bars and Navigation Bars ........................................................................................................................... 291 Flyouts and Menus ...................................................................................................................................................................... 293 WinJS.UI.Flyout Properties, Methods, and Events ....................................................................................................... 294 Flyout Examples ...................................................................................................................................................................... 295 Menus and Menu Commands ............................................................................................................................................ 299 Context Menus ........................................................................................................................................................................ 301 Message Dialogs .......................................................................................................................................................................... 303 Improving Error Handling in Here My Am! ........................................................................................................................ 305 What We’ve Just Learned ......................................................................................................................................................... 309 Chapter 8: State, Settings, Files, and Documents ................................................................ 311 The Story of State ........................................................................................................................................................................ 312 Settings and State ................................................................................................................................................................... 314 App Data Locations ................................................................................................................................................................ 315 AppData APIs (WinRT and WinJS) .................................................................................................................................... 317 Settings Containers ................................................................................................................................................................ 318 Versioning App State ............................................................................................................................................................ 320 Storage Folders and Storage Files .................................................................................................................................... 321 The FileIO, PathIO, and WinJS helper classes (plus FileReader) ............................................................................. 325 Encryption and Compression ............................................................................................................................................. 326 Using App Data APIs for State Management ................................................................................................................ 327 Session State ............................................................................................................................................................................ 327 Local and Temporary State ................................................................................................................................................. 328 IndexedDB and Other Database Options ...................................................................................................................... 329 Roaming State ......................................................................................................................................................................... 331 Settings Pane and UI .................................................................................................................................................................. 333 8
Design Guidelines for Settings ........................................................................................................................................... 334 Populating Commands ......................................................................................................................................................... 336 Implementing Commands: Links and Settings Flyouts .............................................................................................. 338 Programmatically Invoking Settings Flyouts ................................................................................................................ 341 User Data: Libraries, File Pickers, and File Queries ........................................................................................................... 343 Using the File Picker .............................................................................................................................................................. 344 The File Picker UI .................................................................................................................................................................... 345 The File Picker API (and a Few Friends) .......................................................................................................................... 348 Media Libraries ........................................................................................................................................................................ 352 Documents and Removable Storage ............................................................................................................................... 353 Rich Enumeration with File Queries ................................................................................................................................. 354 Here My Am! Update ................................................................................................................................................................. 360 What We’ve Just Learned ......................................................................................................................................................... 361 Chapter 9: Input and Sensors ................................................................................................. 363 Touch, Mouse, and Stylus Input ............................................................................................................................................. 364 The Touch Language, Its Translations, and Mouse/Keyboard Equivalents ........................................................ 366 Edge Gestures .......................................................................................................................................................................... 370 <strong>CSS</strong> Styles That Affect Input ............................................................................................................................................... 371 What Input Capabilities Are Present? .............................................................................................................................. 372 Unified Pointer Events ........................................................................................................................................................... 374 Pointer Capture ....................................................................................................................................................................... 377 Gesture Events ......................................................................................................................................................................... 378 Multipoint Gestures ............................................................................................................................................................... 383 The Input Instantiable Gesture Sample .......................................................................................................................... 384 The Gesture Recognizer ....................................................................................................................................................... 386 Keyboard Input and the Soft Keyboard .............................................................................................................................. 388 Soft Keyboard Appearance and Configuration ............................................................................................................ 389 Adjusting Layout for the Soft Keyboard ......................................................................................................................... 392 Standard Keystrokes .............................................................................................................................................................. 395 Inking ............................................................................................................................................................................................... 396 9
Page 1 and 2: 1 99
Page 3 and 4: Table of Contents Introduction ....
Page 5 and 6: WinJS Tools for Pages and Page Navi
Page 7: Chapter 6: Layout .................
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 and 62:
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
Page 109 and 110:
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
Page 293 and 294:
Flyouts and Menus Going back to our
Page 295 and 296:
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
Page 313 and 314:
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
Page 329 and 330:
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
Page 483 and 484:
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
Page 603 and 604:
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
Page 645 and 646:
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
Page 693 and 694:
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
Page 703 and 704:
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
Page 723 and 724:
Once you add the name of a class an
Page 725 and 726:
With the basic mechanics worked out
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As we did with C#, let’s start by
Page 729 and 730:
Comparing the Results The Image Man
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} return sum; Running a count with
Page 733 and 734:
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
Page 741 and 742:
As with C#, there are additional st
Page 743 and 744:
public IAsyncOperation ConvertPixel
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method called ConvertGrayscalFileAs
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Event names, on the other hand, are
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One challenge, as we saw in the qui
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The Building your own Windows Runti
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• Check against an encrypted lice
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Chapter 17 Apps for Everyone: Acces
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Your App, Your Business If you chec
Page 759 and 760:
FIGURE 17-1 Creating an app package
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desktop applications and distribute
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means is that if you want to promot
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You should also strongly consider m
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• In-app purchases through the Wi
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That said, WinRT provides for the f
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When your app accesses CurrentAppSi
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} }); currentApp.licenseInformation
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You won’t hit your breakpoint imm
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If you’re using a custom commerce
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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
Page 813 and 814:
Sidebar: String Resources in Settin
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the folder name itself doesn’t us
Page 817 and 818:
If you like, you can just send your
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FIGURE 17-11 The Multilingual App T
Page 821 and 822:
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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