145 lines
3.4 KiB
Objective-C
145 lines
3.4 KiB
Objective-C
//
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// MPSumFunction.m
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// MathPad
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//
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// Created by Kim Wittenburg on 22.04.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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#import "MPSumFunction.h"
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#import "MPExpression.h"
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@implementation MPSumFunction
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#pragma mark Creation Methods
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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_startExpression = [[MPExpression alloc] init];
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_startExpression.parent = self;
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_targetExpression = [[MPExpression alloc] init];
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_targetExpression.parent = self;
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_sumExpression = [[MPExpression alloc] init];
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_sumExpression.parent = self;
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}
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return self;
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}
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#pragma mark Properties
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- (void)setStartExpression:(MPExpression *)startExpression
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{
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_startExpression.parent = nil;
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_startExpression = startExpression;
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_startExpression.parent = self;
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[self didChangeChildAtIndex:0];
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}
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- (void)setTargetExpression:(MPExpression *)targetExpression
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{
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_targetExpression.parent = nil;
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_targetExpression = targetExpression;
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_targetExpression.parent = self;
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[self didChangeChildAtIndex:1];
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}
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- (void)setSumExpression:(MPExpression *)sumExpression
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{
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_sumExpression.parent = nil;
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_sumExpression = sumExpression;
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_sumExpression.parent = self;
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[self didChangeChildAtIndex:2];
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}
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#pragma mark Working With the Expression Tree
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- (NSUInteger)numberOfChildren
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{
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return 3;
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}
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- (MPExpression *)childAtIndex:(NSUInteger)index
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{
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switch (index) {
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case 0:
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return self.startExpression;
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case 1:
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return self.targetExpression;
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case 2:
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return self.sumExpression;
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default:
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return nil;
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}
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}
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- (void)setChild:(MPExpression *)child
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atIndex:(NSUInteger)index
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{
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switch (index) {
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// TODO: Copy child?
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case 0:
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self.startExpression = child;
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break;
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case 1:
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self.targetExpression = child;
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break;
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case 2:
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self.sumExpression = child;
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break;
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default:
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return;
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}
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[self didChangeChildAtIndex:index];
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}
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- (NSArray *)children
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{
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return @[self.startExpression, self.targetExpression, self.sumExpression];
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}
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#pragma mark Evaluating Functions
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- (double)evaluateFunction:(NSError *__autoreleasing *)error
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{
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#warning Unimplemented Method
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return 0.0;
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}
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#pragma mark Working With Functions
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/*
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- (BOOL)isEqualToFunction:(MPFunction *)aFunction
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{
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if (![aFunction isKindOfClass:[MPSumFunction class]]) {
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return NO;
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}
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MPSumFunction *sumFunction = (MPSumFunction *)aFunction;
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if (![self.startExpression isEqualToExpression:sumFunction.startExpression]) {
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return NO;
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}
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if (![self.targetExpression isEqualToExpression:sumFunction.targetExpression]) {
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return NO;
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}
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return [self.sumExpression isEqualToExpression:sumFunction.sumExpression];
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}*/
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- (NSString *)description
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{
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return [NSString stringWithFormat:@"Sum(From: %@; To: %@; Using: %@)", self.startExpression, self.targetExpression, self.sumExpression];
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}
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- (NSUInteger)hash
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{
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#warning Unimplemented Method
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return [super hash];
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}
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#pragma mark - NSCopying
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- (id)copyWithZone:(NSZone *)zone
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{
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MPSumFunction *copy = [[MPSumFunction allocWithZone:zone] init];
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copy.startExpression = [self.startExpression copy];
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copy.targetExpression = [self.targetExpression copy];
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copy.sumExpression = [self.sumExpression copy];
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return copy;
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}
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@end
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