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PUBLISHED BY

Microsoft Press

A Division of Microsoft Corporation

One Microsoft Way

Redmond, Washington 98052-6399

any means without the written permission of the publisher.

ISBN: 978-0-7356-7261-1

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indirectly by this book.

Acquisitions, Developmental, and Project Editor: Devon Musgrave

Cover: Twist Creative • Seattle

Table of Contents

Introduction ............................................................................................................................................ 19

Who This Book Is For ................................................................................................................................................................... 20

What You'll Need (Can You Say “Samples”?) ...................................................................................................................... 21

A Formatting Note ........................................................................................................................................................................ 22

Acknowledgements ...................................................................................................................................................................... 23

Errata & Book Support ................................................................................................................................................................ 24

We Want to Hear from You ....................................................................................................................................................... 25

Stay in Touch .................................................................................................................................................................................. 25

Chapter 1: The Life Story of a Windows Store App:

Platform Characteristics of Windows 8 ................................................................................... 26

Leaving Home: Onboarding to the Windows Store .......................................................................................................... 27

Discovery, Acquisition, and Installation ................................................................................................................................. 30

Playing in Your Own Room: The App Container ................................................................................................................ 34

Different Views of Life: View States and Resolution Scaling .......................................................................................... 37

Those Capabilities Again: Getting to Data and Devices .................................................................................................. 40

Taking a Break, Getting Some Rest: Process Lifecycle Management .......................................................................... 43

Remembering Yourself: App State and Roaming .............................................................................................................. 45

Coming Back Home: Updates and New Opportunities ................................................................................................... 48

And, Oh Yes, Then There’s Design .......................................................................................................................................... 50

Chapter 2: Quickstart ................................................................................................................ 52

A Really Quick Quickstart: The Blank App Template ........................................................................................................ 52

Blank App Project Structure .................................................................................................................................................. 55

QuickStart #1: Here My Am! and an Introduction to Blend for Visual Studio ......................................................... 59

Design Wireframes ................................................................................................................................................................... 59

Create the Markup ................................................................................................................................................................... 62

Styling in Blend .......................................................................................................................................................................... 64

Adding the Code ...................................................................................................................................................................... 68

Creating a Map with the Current Location ..................................................................................................................... 69

Oh Wait, the Manifest! ........................................................................................................................................................... 73

Capturing a Photo from the Camera ................................................................................................................................ 75

Sharing the Fun! ....................................................................................................................................................................... 78

Extra Credit: Receiving Messages from the iframe ....................................................................................................... 81

The Other Templates ................................................................................................................................................................... 82

Fixed Layout Template ............................................................................................................................................................ 82

Navigation Template ............................................................................................................................................................... 83

Grid Template ............................................................................................................................................................................ 83

Split Template ............................................................................................................................................................................ 83

What We’ve Just Learned ........................................................................................................................................................... 84

Chapter 3: App Anatomy and Page Navigation ..................................................................... 85

Local and Web Contexts within the App Host .................................................................................................................... 86

Referencing Content from App Data: ms-appdata ....................................................................................................... 90

Here My Am! with ms-appdata ........................................................................................................................................... 92

Sequential Async Operations: Chaining Promises ............................................................................................................. 94

Error Handling Within Promises: then vs. done ............................................................................................................. 96

Debug Output, Error Reports, and the Event Viewer ................................................................................................... 96

App Activation ................................................................................................................................................................................ 99

Branding Your App 101: The Splash Screen and Other Visuals ................................................................................ 99

Activation Event Sequence .................................................................................................................................................. 101

Activation Code Paths ........................................................................................................................................................... 103

WinJS.Application Events ..................................................................................................................................................... 105

Extended Splash Screens ...................................................................................................................................................... 106

Activation Deferrals ............................................................................................................................................................... 108

App Lifecycle Transition Events and Session State .......................................................................................................... 109

Suspend, Resume, and Terminate ..................................................................................................................................... 109

Basic Session State in Here My Am! ................................................................................................................................. 114

Data from Services and WinJS.xhr ......................................................................................................................................... 116

Handling Network Connectivity (in Brief) ...................................................................................................................... 119

Tips and Tricks for WinJS.xhr .............................................................................................................................................. 120

Page Controls and Navigation ............................................................................................................................................... 121

WinJS Tools for Pages and Page Navigation ................................................................................................................ 121

The Navigation App Template, PageControl Structure, and PageControlNavigator ..................................... 123

The Navigation Process and Navigation Styles ............................................................................................................ 129

Optimizing Page Switching: Show-and-Hide ............................................................................................................... 130

WinRT Events and removeEventListener ............................................................................................................................. 131

Completing the Promises Story .............................................................................................................................................. 133

What We’ve Just Learned ......................................................................................................................................................... 135

Chapter 4: Controls, Control Styling, and Data Binding ..................................................... 136

The Control Model for HTML, CSS, and JavaScript ......................................................................................................... 137

HTML Controls ............................................................................................................................................................................. 138

WinJS stylesheets: ui-light.css, ui-dark.css, and win-* styles .................................................................................... 141

Extensions to HTML Elements ............................................................................................................................................ 142

WinJS Controls ............................................................................................................................................................................. 142

WinJS Control Instantiation ................................................................................................................................................. 144

Strict Processing and processAll Functions .................................................................................................................... 145

Example: WinJS.UI.Rating Control ..................................................................................................................................... 146

Example: WinJS.UI.Tooltip Control ................................................................................................................................... 147

Working with Controls in Blend ............................................................................................................................................. 149

Control Styling ............................................................................................................................................................................. 151

Styling Gallery: HTML Controls .......................................................................................................................................... 153

Styling Gallery: WinJS Controls .......................................................................................................................................... 155

Some Tips and Tricks ............................................................................................................................................................. 158

Custom Controls .......................................................................................................................................................................... 159

Custom Control Examples ................................................................................................................................................... 161

Custom Controls in Blend .................................................................................................................................................... 164

Data Binding ................................................................................................................................................................................. 167

Data Binding in WinJS ........................................................................................................................................................... 169

One-Time Binding.................................................................................................................................................................. 170

One-Way Binding................................................................................................

................................................................... 173

Implementing Two-Way Binding ..................................................................................................................................... 175