ftp.nice.ch/pub/next/tools/scsi/SCSIInquire.3.0.s.tar.gz#/Inquirer/Calculator.h

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//
// Calculator.h
// Copyright (c) 1990,1991,1992 by Jiro Nakamura 
// All rights reserved
//
// Maintains a simple 4-function + others calculator in Objective-C
// Doesn't handle algebraic notation or simple ordering.
//
// RCS Information
// Revision Number->	$Revision: 1.8 $
// Last Revised->	$Date: 92/02/02 18:24:19 $
//

#import <appkit/Panel.h>
#import <appkit/Text.h>

@interface Calculator: Panel
{
	double	x,	// Current (displayed) number
		y,	// Previous (stored) number
		m;	// Memory number
	
	BOOL	x_hasDecimal,
		x_isNew,
		calcDidInit;
		
	int 	displayMode;
	
	int	currentOperation;
	
    	id	display;
	id	memoryDisplay;
	id	operationDisplay;
	
	id	scrollDisplay;
	Text	*scrollText;
	
	id	invisibleEnterKey;
	
	id	hexadecimalKeyMatrix;
	id	decimalKeyMatrix;
	id	decimalPointKey;
}

- key_clear:sender;
- key_divide:sender;
- key_number:sender;
- key_log:sender;
- key_squareRoot:sender;
- key_memory:sender;
- key_factorial:sender;
- key_multiply:sender;
- key_add:sender;
- key_subtract:sender;
- key_enter:sender;
- key_allClear:sender;
- key_power:sender;
- key_negate:sender;
- key_logicalOr: sender;
- key_logicalAnd: sender;
- key_logicalEor: sender;
- key_baseChanged: sender;

- setDisplay;
- clearDisplay;
- errorDisplay;
- errorDisplay: (char *) error;
- (double) getDisplay;
- updateMemoryMarker;
- updateOperationMarker;
- processPrevious;
// Delegate stuff to ensure proper miniaturization behaviour
- windowWillMiniaturize: sender toMiniwindow: mini;
- windowDidUpdate: sender;
- windowDidDeminiaturize: sender;
- setScrollOperation: (char *) op andNumber: (double) val;

// From CalculatorLab/MinusPanel.h
- (BOOL)commandKey:(NXEvent *)theEvent;

@end

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.