ClockControlAccessibility.m

/*
     File: ClockControlAccessibility.m
 Abstract: Accessorizes the clock cell.
  Version: 1.0
 
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 */
 
#import <ClockControl.h>
#import <AppKit/NSAccessibility.h>
 
@implementation ClockCell (ClockCellAccessibility)
 
NSString *AppleSynthesisAttribute = @"AppleSynthesis";
 
// Attributes
//
// Add a value attribute which is settable. Add an AppleSynthesis attribute for yucks. Inherit role (which we override) as well as size, position, ... which we can leave alone.
 
- (NSArray *)accessibilityAttributeNames {
    static NSArray *attributes = nil;
    if (attributes == nil) {
        attributes = [[[super accessibilityAttributeNames] arrayByAddingObjectsFromArray:[NSArray arrayWithObjects:NSAccessibilityValueAttribute, AppleSynthesisAttribute, nil]] retain];
    }
    return attributes;
}
 
- (id)accessibilityAttributeValue:(NSString *)attribute {
    if ([attribute isEqualToString:NSAccessibilityRoleAttribute]) {
        return @"AnalogClock";
    } else if ([attribute isEqualToString:NSAccessibilityRoleDescriptionAttribute]) {
        return NSLocalizedString(@"Analog Clock", "Description of clock control for accessibility purposes");
    } else if ([attribute isEqualToString:NSAccessibilityValueAttribute]) {
        return [self stringValue];
    } else if ([attribute isEqualToString:AppleSynthesisAttribute]) {
        return [NSString stringWithFormat:NSLocalizedString(@"At the tone, the time will be %@, [[inpt phon]] b1IY IY IY IY IY IY IY IY IY 1IYp [[inpt text]]", "String to read the time for accessibility purposes"), [self stringValue]];
    } else {
        return [super accessibilityAttributeValue:attribute];
    }
}
 
- (BOOL)accessibilityIsAttributeSettable:(NSString *)attribute {
    if ([attribute isEqualToString:NSAccessibilityValueAttribute]) {
        return YES;
    } else if ([attribute isEqualToString:AppleSynthesisAttribute]) {
        return NO;
    } else {
        return [super accessibilityIsAttributeSettable:attribute];
    }
}
 
- (void)accessibilitySetValue:(id)value forAttribute:(NSString *)attribute {
    if ([attribute isEqualToString:NSAccessibilityValueAttribute]) {
        [self setStringValue:value];
    } else {
        [super accessibilitySetValue:value forAttribute:attribute];
    }
}
 
// Actions
//
// Implement increment/decrement to act like the arrow keys
 
- (NSArray *)accessibilityActionNames {
    return [NSArray arrayWithObjects:NSAccessibilityIncrementAction, NSAccessibilityDecrementAction, nil];
}
 
- (NSString *)accessibilityActionDescription:(NSString *)action {
    if ([action isEqualToString:NSAccessibilityIncrementAction]) {
        return NSLocalizedString(@"Increment", "Description of time increment action, for accessibility purposes");
    } else if ([action isEqualToString:NSAccessibilityDecrementAction]) {
        return NSLocalizedString(@"Decrement", "Description of time decrement action, for accessibility purposes");
    } else {
        return [super accessibilityActionDescription:action];
    }
}
 
- (void)accessibilityPerformAction:(NSString *)action {
    if ([action isEqualToString:NSAccessibilityIncrementAction]) {
        [self moveRight:self];
    } else if ([action isEqualToString:NSAccessibilityDecrementAction]) {
        [self moveLeft:self];
    } else {
        [super accessibilityPerformAction:action];
    }
}
 
@end