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Similar to Session 100 usable by everybody design principles for accessibility on mac os x
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Session 100 usable by everybody design principles for accessibility on mac os x
- 1. Design principles for accessibility on Mac OS X Gregory Hughes, Ph.D. Software Engineer Usable by Everybody 2
- 2. What Is Universal Design? 3
- 3. Three Main Focus Areas 4
- 4. Yellow Dog Productions · Digital Vision · Getty Images 5
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- 8. 9
- 11. 10 Million Americans are visually impaired www.afb.org/info_documents.asp?collectionid=15 [Mar 25, 2008] 12
- 12. S. Kochkin. Marketrak vii: Hearing loss population tops 31 million. The Hearing Review, (2005), July 2005. 31 Million Americans are hearing impaired 13
- 13. 12 Million Americans have a learning disability C. Smith and L. Strick. Learning Disabilities: A to Z. The Free Press, 1997. 14
- 14. 50 Million 1 in 5 Americans have a disability http://www.census.gov/Press-Release/www/releases/archives/facts_for_features_special_editions/001823.html 15
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- 21. Talking iPods 22
- 22. VoiceOver 5 Years Macs with VoiceOver Millions 23
- 23. ?>>>> 24
- 26. Universal Design Considerations Visual Auditory Cognitive Physical 27
- 28. How to Implement Universal Design? 29
- 30. 31
- 31. Resolution •Usable at low resolutions ■ 1024x768 recommended ■ Aids users with visual impairments ■ Aids elderly users ■ Helps when displaying on a projector 32
- 32. 33
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- 36. Font Size •Provide adjustable font sizes for key UI ■ Aids users with visual impairments ■ Aids elderly users ■ Helps during demonstrations 37
- 37. - (NSUInteger)adjustedSystemFontSize { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; CGFloat fontSize = [defaults floatForKey:@”fontSize”]; if ( fontSize < 8.0f ) { return [NSFont systemFontSize]; } return fontSize; } Adjust UI Font Size 38
- 38. - (NSFont *)adjustedSystemFont { CGFloat newSize = [self adjustedSystemFontSize]; return [NSFont systemFontOfSize:newSize]; } Adjust system fonts Adjust UI Font Size 39
- 39. - (void)updateFonts { [myTextLabel setFont:[self offsetFontForElement:myTextLabel]; [myTextLabel2 setFont:[self offsetFontForElement:myTextLabel2]; } Apply to an element Adjust UI Font Size 40
- 40. - (void)updateFonts { NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init]; NSFont *newFont = [self adjustedSystemFont]; for ( NSTableColumn *column in [myTable tableColumns] ) { id dataCell = [column dataCell]; [dataCell setFont:newFont]; } CGFloat desiredHeight = [layoutManager defaultLineHeightForFont:newFont]; [myTable setRowHeight:desiredHeight + 1]; [layoutManager release]; } Apply to an NSTable Adjust UI Font Size 41
- 41. DOW J 0.30 % Nasdaq 0.12 % DOW J + 0.30 % Nasdaq - 0.12 % 42
- 42. DOW J 0.30 % Nasdaq 0.12 % DOW J + 0.30 % Nasdaq - 0.12 % 43
- 44. Accessibility API Most items can be given a description in Interface Builder 45
- 45. - (void)accessibilitySetOverrideValue:(id)value forAttribute:(NSString *)attribute Programmatic accessibility •Convenience method for anything that can be set in IB NSAccessibility 46
- 46. Demo 47
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- 51. Every Mac includes a range of built in features to address those with disabilities, vision, hearing, motor skills, and learning disabilities and all of these technologies come standard on every new Mac. 52
- 53. Auditory Considerations •Don’t provide audio-only feedback •All sounds should work in mono audio •Be conscious of sound frequency choices •Consider allowing user-selectable sounds 54
- 54. NSBeep() 55
- 55. NSBeep() 56
- 56. Dock Icon Change icon to represent state 57
- 57. Dock Icon Change icon to represent state 58
- 58. Dock Icon Change icon to represent state 59
- 59. Dock Icon Change icon to represent state NSImage *myImage = [NSImage imageNamed:imageName]; [NSApp setApplicationIconImage: myImage]; 60
- 60. Dock Icon Badge the icon [[NSApp dockTile] setBadgeLabel:@"1"]; 1 61
- 61. Dock Icon Bounce your icon [NSApp requestUserAttention:NSCriticalRequest]; 62
- 62. Dock Icon Bounce your icon [NSApp requestUserAttention:NSCriticalRequest]; 63
- 63. Dock Icon Bounce your icon [NSApp requestUserAttention:NSCriticalRequest]; 64
- 64. Demo 65
- 66. 67
- 67. Physical Considerations Provide interaction alternatives •Provide keyboard shortcuts for common tasks •Ensure full keyboard navigation •Provide keyboard alternatives to mouse actions 68
- 68. Drag and Drop Keyboard Support Provide a keyboard shortcut •Add commands to change ordering •Add cut/copy/paste support alongside drag and drop 69
- 69. Enable Full Keyboard Access Check tab order 70
- 70. Demo 71
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- 76. Fullscreen Mode Bring an NSView into fullscreen to limit distractions - (IBAction)enterFullScreen:(id)sender { [fullScreenView enterFullScreenMode:[NSScreen mainScreen] withOptions:nil]; } 77
- 80. Demo 81
- 81. Summary Resolution Font size Color choice NSAccessibility API Non-audible feedback Closed captions Mono audio Full keyboard access Tab order Menu shortcuts Simplify interface Hide advanced options Fullscreen mode 82
- 82. Bill Dudney Application Technologies Evangelist dudney@apple.com Accessibility Mailing List Public developer list accessibility-dev@lists.apple.com Documentation http://developer.apple.com/wwdc Apple Developer Forums http://devforums.apple.com More Information 83
- 84. Accessibility on iPhone OS Nob Hill Wednesday 4:30PM Related Sessions 85
- 85. OS X Accessibility Lab Application Frameworks Lab B Tuesday 2:00PM iPhone Accessibility Lab Application Frameworks Lab B Thursday 9:00AM Labs 86
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