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[21] | 1 | //
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| 2 | // NJRIntegerFilter.m
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| 3 | // HostLauncher
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| 4 | //
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| 5 | // Created by Nicholas Riley on Tue Dec 18 2001.
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| 6 | // Copyright (c) 2001 Nicholas Riley. All rights reserved.
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| 7 | //
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| 8 |
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| 9 | // based on MyIntegerFilter
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| 10 | // Copyright © 2001 Bill Cheeseman. All rights reserved.
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| 11 |
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| 12 | #import "NJRIntegerFilter.h"
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| 13 |
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| 14 | @implementation NJRIntegerFilter
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| 15 |
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| 16 | // Input filter
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| 17 |
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| 18 | - (BOOL)isPartialStringValid:(NSString **)partialStringPtr proposedSelectedRange:(NSRangePointer)proposedSelRangePtr originalString:(NSString *)origString originalSelectedRange:(NSRange)origSelRange errorDescription:(NSString **)error {
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| 19 |
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| 20 | // Override method to enable NSControl delegate method control:didFailToValidatePartialString:errorDescription: to
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| 21 | // reject invalid keypresses. Filters out keyboard input characters other than "1" .. "9".
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| 22 | if ([[*partialStringPtr substringWithRange:NSMakeRange(origSelRange.location, (*proposedSelRangePtr).location - origSelRange.location)] rangeOfCharacterFromSet:[[NSCharacterSet decimalDigitCharacterSet] invertedSet] options:NSLiteralSearch].location != NSNotFound) {
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| 23 | *error = NSLocalizedString(@"Input is not an integer", @"Presented when user value not a numeric digit");
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| 24 | return NO; // Reject *partialStringPtr as typed, invoke delegate method
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| 25 | }
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| 26 |
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| 27 | if ([*partialStringPtr length] == 0) {
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| 28 | // Work around NSFormatter issue in Mac OS X 10.0.
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| 29 | [[[NSApp keyWindow] fieldEditor:NO forObject:nil] setSelectedRange:*proposedSelRangePtr];
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| 30 | }
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| 31 |
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| 32 | return YES; // Accept *partialStringPtr as typed
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| 33 | }
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| 34 |
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| 35 | @end
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