MICROSOFT_PRESS_EBOOK_PROGRAMMING_WINDOWS_8_APPS_WITH_HTML_CSS_AND_JAVASCRIPT_PDF

Id=\"e2a62d42-dbca-43d2-b779-66eb916d9df4\" AppId=\"Microsoft.SDKSamples.Store.JS_8wekyb3d8bbwe\"
ProductId=\"product2\" PurchaseDate=\"2012-09-11T17:39:12Z\" ProductType=\"Durable\"
ExpirationDate=\"2014-01-01T00:00:00Z\" />
If you want to consume a receipt as an XML document instead of a string (for display or print), it’s a
simple matter to create such an object like we did with tile and notification XML in Chapter 13:
var receiptDOM = new Windows.Data.Xml.Dom.XmlDocument();
receiptDOM.loadXml(receipt);
Accessibility
As I mentioned in this chapter’s introduction, nearly 60% of users employ accessibility features in some
capacity—sometimes because of a real disability, sometimes due to personal preference, and sometimes
just to make the device easier to use within certain environments. In many countries, accessibility is
actually a legal requirement, so it will be necessary if you plan to make an app available in those regions.
In short, supporting accessibility is something that every app should do and do well, and fortunately this
isn’t the onerous task you might think it to be. (For reference, see Making your app accessible and
Introduction to Web Accessibility; the latter is written for web apps but is very applicable to Windows
Store apps. Also see Guidelines and checklist for Accessibility, Practices to avoid for accessible apps, and
Implementing accessibility for particular content types.)
Accessibility might feel like a lot of work because developers are relatively unfamiliar with what it
means. To remedy this, take a few minutes to give yourself some direct experience. But before you do
anything else:
Go to PC Settings > Sync Your Settings and turn off the options for Desktop Personalization and Ease
of Access. Otherwise the effects of your tinkering will roam to other devices you might have. I learned this
the hard way when I was playing around with contrast settings on my main laptop after which a game my
son wanted to play on a tablet came up mostly black! Clearly, that app didn’t handle high contrast well,
but it also took me a while to figure out what was going on!
Now that we’ve taken care of that detail, try the following:
• Press Left Shift+Alt+Print Screen or go to PC Settings > Ease of Access and toggle high contrast
mode (see image below). How does the app respond? Are all of the critical elements visible? A
mode like this is important for users who have difficulty distinguishing subtle colors.
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