This is MiscLogSliderCell.h in view mode; [Download] [Up]
//
// MiscLogSliderCell.m -- a SliderCell with logarithmic transfer function
// Written by Don Yacktman, Copyright (c) 1994 by Don Yacktman.
// Version 1.0 All rights reserved.
// This notice may not be removed from this source code.
//
// This object is included in the MiscKit by permission from the author
// and its use is governed by the MiscKit license, found in the file
// "LICENSE.rtf" in the MiscKit distribution. Please refer to that file
// for a list of all applicable permissions and restrictions.
//
// how we do a log slider: we have a slider that thinks it goes from 0 to 1.
// then, whenever a value is set or requested, we re-map that value based
// upon the realMin, realMax, and base variables. So we're basically
// filtering the values to give them a non-linear transfer function.
#import <appkit/SliderCell.h>
@interface MiscLogSliderCell:SliderCell
{
@private
double base, realMax, realMin; // access these only via methods!
// These next two are used to optimize: log(base, max), log(base, min)
// by caching these, we don't have to calc them every time.
double _lbx, _lbn;
}
- init;
- setBase:(double)newBase;
- (double)base;
// overridden methods:
- setMaxValue:(double)aDouble;
- (double)maxValue;
- setMinValue:(double)aDouble;
- (double)minValue;
- (const char *)stringValue;
- setStringValue:(const char *)aString;
- (int)intValue;
- setIntValue:(int)anInt;
- (float)floatValue;
- setFloatValue:(float)aFloat;
- (double)doubleValue;
- setDoubleValue:(double)aDouble;
- read:(NXTypedStream *)stream;
- write:(NXTypedStream *)stream;
- awake;
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.