http://slackware.bholcomb.com/slackware/slackware-11.0/source/xap/xscreensaver/xscree...

[xscreensaver] / OSX / InvertedSlider.m

diff --git a/OSX/InvertedSlider.m b/OSX/InvertedSlider.m
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+++ b/OSX/InvertedSlider.m
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+/* xscreensaver, Copyright (c) 2006 Jamie Zawinski <jwz@jwz.org>
+*
+* Permission to use, copy, modify, distribute, and sell this software and its
+* documentation for any purpose is hereby granted without fee, provided that
+* the above copyright notice appear in all copies and that both that
+* copyright notice and this permission notice appear in supporting
+* documentation.  No representations are made about the suitability of this
+* software for any purpose.  It is provided "as is" without express or 
+* implied warranty.
+*
+* This is a subclass of NSSlider that is flipped horizontally:
+* the high value is on the left and the low value is on the right.
+*/
+
+#import "InvertedSlider.h"
+
+@implementation InvertedSlider
+
+-(double) transformValue:(double) value
+{
+  double low   = [self minValue];
+  double high  = [self maxValue];
+  double range = high - low;
+  double off   = value - low;
+  double trans = low + (range - off);
+  // NSLog (@" ... %.1f -> %.1f    [%.1f - %.1f]\n", value, trans, low, high);
+  return trans;
+}
+
+-(double) doubleValue;
+{
+  return [self transformValue:[super doubleValue]];
+}
+
+-(void) setDoubleValue:(double)v
+{
+  return [super setDoubleValue:[self transformValue:v]];
+}
+
+
+/* Implement all accessor methods in terms of "doubleValue" above.
+ */
+
+-(float) floatValue;
+{
+  return (float) [self doubleValue];
+}
+
+-(int) intValue;
+{
+  return (int) [self doubleValue];
+}
+
+-(id) objectValue;
+{
+  return [NSNumber numberWithDouble:[self doubleValue]];
+}
+
+-(NSString *) stringValue;
+{
+  return [NSString stringWithFormat:@"%f", [self floatValue]];
+}
+
+- (NSAttributedString *)attributedStringValue;
+{
+  return [[NSAttributedString alloc] initWithString:[self stringValue]];
+}
+
+
+/* Implment all setter methods in terms of "setDoubleValue", above.
+ */
+
+-(void) setFloatValue:(double)v
+{
+  [self setDoubleValue:(double)v];
+}
+
+-(void) setIntValue:(int)v
+{
+  [self setDoubleValue:(double)v];
+}
+
+-(void) setObjectValue:(id <NSCopying>)v
+{
+  NSAssert2((v == nil) ||
+            [(NSObject *) v respondsToSelector:@selector(doubleValue)], 
+            @"argument %@ to %s does not respond to doubleValue",
+            v, __PRETTY_FUNCTION__);
+  [self setDoubleValue:[((NSNumber *) v) doubleValue]];
+}
+
+-(void) setStringValue:(NSString *)v
+{
+  [self setDoubleValue:[v doubleValue]];
+}
+
+-(void) setAttributedStringValue:(NSAttributedString *)v
+{
+  [self setStringValue:[v string]];
+}
+
+@end