| author | Jens Alfke <jens@mooseyard.com> |
| Sat May 17 13:14:48 2008 -0700 (2008-05-17) | |
| changeset 9 | 823e7e74088e |
| parent 0 | d84d25d6cdbb |
| child 11 | e5976864dfe9 |
| permissions | -rw-r--r-- |
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// |
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// TimeIntervalFormatter.m |
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// MYUtilities |
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// |
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// Copyright 2008 Jens Alfke. All rights reserved. |
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// |
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|
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#import "TimeIntervalFormatter.h" |
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@implementation TimeIntervalFormatter |
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- (id) init |
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{
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self = [super init]; |
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if (self != nil) {
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_showsMinutes = YES; |
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} |
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return self; |
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} |
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|
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- (void) awakeFromNib |
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{
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_showsMinutes = YES; |
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} |
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|
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- (void) setShowsMinutes: (BOOL)show {_showsMinutes = show;}
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- (void) setShowsFractionalSeconds: (BOOL)show {_showsFractionalSeconds = show;}
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+ (NSString*) formatTimeInterval: (NSTimeInterval)interval |
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{
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TimeIntervalFormatter *fmt = [[self alloc] init]; |
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NSString *result = [fmt stringForObjectValue: [NSNumber numberWithDouble: interval]]; |
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[fmt release]; |
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return result; |
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} |
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- (NSString*) stringForObjectValue: (id)object |
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{
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if (![object isKindOfClass:[NSNumber class]]) |
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return nil; |
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NSTimeInterval time = [object doubleValue]; |
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NSString *sign; |
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if( time==0.0 ) |
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return nil; |
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else if( time < 0.0 ) {
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sign = @"-"; |
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time = -time; |
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} else |
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sign = @""; |
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if( ! _showsFractionalSeconds ) |
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time = floor(time); |
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int minutes = (int)floor(time / 60.0); |
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if( _showsMinutes || minutes>0 ) {
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double seconds = time - 60.0*minutes; |
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return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%d:%06.3lf" :@"%@%d:%02.0lf"), |
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sign,minutes,seconds]; |
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} else {
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return [NSString stringWithFormat: (_showsFractionalSeconds ?@"%@%.3lf" :@"%@%.0lf"), |
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sign,time]; |
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} |
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} |
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- (BOOL)getObjectValue:(id *)anObject |
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forString:(NSString *)string |
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errorDescription:(NSString **)error |
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{
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NSScanner *scanner = [NSScanner scannerWithString: string]; |
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[scanner setCharactersToBeSkipped: [NSCharacterSet whitespaceCharacterSet]]; |
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double seconds; |
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if( [scanner isAtEnd] ) {
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seconds = 0.0; |
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} else {
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if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error; |
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if( [scanner scanString: @":" intoString: NULL] ) {
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double minutes = seconds; |
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if( ! [scanner scanDouble: &seconds] || seconds<0.0 ) goto error; |
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seconds += 60*minutes; |
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} |
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if( ! [scanner isAtEnd] ) goto error; |
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} |
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*anObject = [NSNumber numberWithDouble: seconds]; |
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return YES; |
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|
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error: |
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*anObject = nil; |
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if( error ) |
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*error = @"Not a valid time interval"; |
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return NO; |
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} |
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- (BOOL)isPartialStringValid:(NSString **)partialStringPtr |
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proposedSelectedRange:(NSRangePointer)proposedSelRangePtr |
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originalString:(NSString *)origString |
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originalSelectedRange:(NSRange)origSelRange |
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errorDescription:(NSString **)error |
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{
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static NSCharacterSet *sIllegalChars; |
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if( ! sIllegalChars ) |
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sIllegalChars = [[[NSCharacterSet characterSetWithCharactersInString: @"0123456789.:"] |
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invertedSet] retain]; |
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return [*partialStringPtr rangeOfCharacterFromSet: sIllegalChars].length == 0; |
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} |
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@end |