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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
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<title>iSpend - /iSpend_03/MyDocument.m</title>
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<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxDataManagement-date.html">Data Management</a> > <A HREF="javascript:location.replace('index.html');">iSpend</A> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">iSpend</div></h1></td>
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<h2>/iSpend_03/MyDocument.m</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/iSpend_01/ExpandableViewController.h</option>
<option value="listing2.html">/iSpend_01/ExpandableViewController.m</option>
<option value="listing3.html">/iSpend_01/main.m</option>
<option value="listing4.html">/iSpend_01/MyDocument.h</option>
<option value="listing5.html">/iSpend_01/MyDocument.m</option>
<option value="listing6.html">/iSpend_01/MyDocument_Toolbar.m</option>
<option value="listing7.html">/iSpend_01/Transaction.h</option>
<option value="listing8.html">/iSpend_01/Transaction.m</option>
<option value="listing9.html">/iSpend_01/TransactionsController.h</option>
<option value="listing10.html">/iSpend_01/TransactionsController.m</option>
<option value="listing11.html">/iSpend_02/ExpandableViewController.h</option>
<option value="listing12.html">/iSpend_02/ExpandableViewController.m</option>
<option value="listing13.html">/iSpend_02/main.m</option>
<option value="listing14.html">/iSpend_02/MyDocument.h</option>
<option value="listing15.html">/iSpend_02/MyDocument.m</option>
<option value="listing16.html">/iSpend_02/MyDocument_Pasteboard.h</option>
<option value="listing17.html">/iSpend_02/MyDocument_Pasteboard.m</option>
<option value="listing18.html">/iSpend_02/MyDocument_Toolbar.m</option>
<option value="listing19.html">/iSpend_02/Transaction.h</option>
<option value="listing20.html">/iSpend_02/Transaction.m</option>
<option value="listing21.html">/iSpend_02/TransactionsController.h</option>
<option value="listing22.html">/iSpend_02/TransactionsController.m</option>
<option value="listing23.html">/iSpend_02/TransactionsController_Dragging.m</option>
<option value="listing24.html">/iSpend_03/ExpandableViewController.h</option>
<option value="listing25.html">/iSpend_03/ExpandableViewController.m</option>
<option value="listing26.html">/iSpend_03/main.m</option>
<option value="listing27.html">/iSpend_03/MyDocument.h</option>
<option value="listing28.html">/iSpend_03/MyDocument.m</option>
<option value="listing29.html">/iSpend_03/MyDocument_Pasteboard.h</option>
<option value="listing30.html">/iSpend_03/MyDocument_Pasteboard.m</option>
<option value="listing31.html">/iSpend_03/MyDocument_Toolbar.m</option>
<option value="listing32.html">/iSpend_03/Transaction.h</option>
<option value="listing33.html">/iSpend_03/Transaction.m</option>
<option value="listing34.html">/iSpend_03/TransactionsController.h</option>
<option value="listing35.html">/iSpend_03/TransactionsController.m</option>
<option value="listing36.html">/iSpend_03/TransactionsController_Dragging.m</option>
<option value="listing37.html">/iSpend_03/TransactionsController_Sorting.m</option>
<option value="listing38.html">/iSpend_04/ExpandableViewController.h</option>
<option value="listing39.html">/iSpend_04/ExpandableViewController.m</option>
<option value="listing40.html">/iSpend_04/main.m</option>
<option value="listing41.html">/iSpend_04/MyDocument.h</option>
<option value="listing42.html">/iSpend_04/MyDocument.m</option>
<option value="listing43.html">/iSpend_04/MyDocument_Pasteboard.h</option>
<option value="listing44.html">/iSpend_04/MyDocument_Pasteboard.m</option>
<option value="listing45.html">/iSpend_04/MyDocument_Toolbar.m</option>
<option value="listing46.html">/iSpend_04/SearchController.h</option>
<option value="listing47.html">/iSpend_04/SearchController.m</option>
<option value="listing48.html">/iSpend_04/Transaction.h</option>
<option value="listing49.html">/iSpend_04/Transaction.m</option>
<option value="listing50.html">/iSpend_04/TransactionsController.h</option>
<option value="listing51.html">/iSpend_04/TransactionsController.m</option>
<option value="listing52.html">/iSpend_04/TransactionsController_Dragging.m</option>
<option value="listing53.html">/iSpend_04/TransactionsController_Sorting.m</option>
<option value="listing54.html">/iSpendPlugin/GetMetadataForFile.m</option>
<option value="listing55.html">/iSpendPlugin/main.c</option>
<option value="listing56.html">/iSpendPlugin/Transaction.h</option>
<option value="listing57.html">/iSpendPlugin/Transaction.m</option></select>
</p>
</form>
<p><strong><a href="iSpend.zip">Download Sample</a></strong> (“iSpend.zip”, 1.04M)<BR>
<strong><a href="iSpend.dmg">Download Sample</a></strong> (“iSpend.dmg”, 1.32M)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
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<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">/*
File: MyDocument.m
Abstract: This NSDocument subclass manages the data model for a personal finance application. It uses bindings to keep the model and view in sync.
Version: 1.0
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Computer, Inc. ("Apple") in consideration of your agreement to the
following terms, and your use, installation, modification or
redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use,
install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Computer,
Inc. may be used to endorse or promote products derived from the Apple
Software without specific prior written permission from Apple. Except
as expressly stated in this notice, no other rights or licenses, express
or implied, are granted by Apple herein, including but not limited to
any patent rights that may be infringed by your derivative works or by
other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright © 2005 Apple Computer, Inc., All Rights Reserved
*/
#import "MyDocument.h"
#import "MyDocument_Pasteboard.h"
#import "Transaction.h"
#import "TransactionsController.h"
@implementation MyDocument
+ (void)initialize {
// we call setKeys:triggerChangeNotificationsForDependentKey so that our balance accessor (which computes the current balance) will be invoked whenever there is a change to the openingBalance or the transactions array. This method should be called from +initialize because it only needs to be called once per class, not once per instance
[self setKeys:[NSArray arrayWithObjects:@"openingBalance", @"transactions", nil] triggerChangeNotificationsForDependentKey:@"balance"];
}
- (id)init
{
static BOOL registeredServices = NO;
self = [super init];
if (self) {
// initialize categories and accountTypes with some predefined strings
[self setCategories:[NSArray arrayWithObjects:@"Meals", @"Utilities", @"Mortgage", @"Gas", @"Insurance", nil]];
[self setAccountTypes:[NSArray arrayWithObjects:@"Checking", @"Savings", @"Credit Card", @"Brokerage", @"Mutual Fund", @"Money Market", nil]];
// we need to know when any transaction is added or removed so we can observe any changes to any amounts, again to keep the balance up to date
[self addObserver:self forKeyPath:@"transactions" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:NULL];
if (!registeredServices) {
// register as service provider
[NSApp setServicesProvider:[self class]];
// register as service consumer
[NSApp registerServicesMenuSendTypes:[self writablePasteboardTypes] returnTypes:[self readablePasteboardTypes]];
registeredServices = YES;
}
}
return self;
}
- (void)dealloc {
[self removeObserversForKeyPathsInTransactions:_transactions];
[_transactions release];
_transactions = nil;
[_categories release];
_categories = nil;
[_accountTypes release];
_accountTypes = nil;
[super dealloc];
}
- (void)windowControllerDidLoadNib:(NSWindowController *)windowController {
// Set up the toolbar after the document nib has been loaded
[self setupToolbarForWindow:[windowController window]];
}
// balance accessors
- (float)balance {
// current balance is the opening balance plus the sum of all the transaction amounts (which may be negative)
float balance = _openingBalance;
int i, count = [_transactions count];
for (i = 0; i < count; i++) {
balance += [[_transactions objectAtIndex:i] amount];
}
return balance;
}
- (void)setOpeningBalance:(float)balance {
[[[self undoManager] prepareWithInvocationTarget:self] setOpeningBalance:_openingBalance];
_openingBalance = balance;
}
// key value observing
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
// we'll be notified whenever there is a change to transactions, whether the array is replaced or an object is added or removed, because of the observing we set up in -init
if (object == self && [keyPath isEqualToString:@"transactions"]) {
// set oldTransactions to the array of transactions that have been removed
NSArray *oldTransactions = [change objectForKey:NSKeyValueChangeOldKey];
if ([oldTransactions count] > 0) {
// this change can be undone by adding oldTransactions back into the arrayController
[[[self undoManager] prepareWithInvocationTarget:self] insertObjects:oldTransactions inTransactionsAtIndexes:[change objectForKey:NSKeyValueChangeIndexesKey]];
[self removeObserversForKeyPathsInTransactions:oldTransactions];
}
// set newTransactions to the array of transactions that have been added
NSArray *newTransactions = [change objectForKey:NSKeyValueChangeNewKey];
if ([newTransactions count] > 0) {
// this change can be undone by removing newTransactions from the arrayController
[[self undoManager] registerUndoWithTarget:self selector:@selector(removeObjectsFromTransactionsAtIndexes:) object:[change objectForKey:NSKeyValueChangeIndexesKey]];
// set the document in each transaction so that the transaction can find our undoManager
[newTransactions makeObjectsPerformSelector:@selector(setDocument:) withObject:self];
[self addObserversForKeyPathsInTransactions:newTransactions];
}
}
// observeValueForKeyPath... gets called with one of the below keyPaths ("amount", "type", or "accountType") when the value for that keyPath changes in a transaction, because of the observing we set up above
if ([keyPath isEqualToString:@"amount"]) {
// the amount has changed in one of the transactions. Cause balance to get updated
[self willChangeValueForKey:@"balance"];
[self didChangeValueForKey:@"balance"];
} else if ([keyPath isEqualToString:@"type"]) {
// the type has changed in one of the transactions. If this is a type we haven't seen before, add it to _categories
NSString *category = [object valueForKeyPath:@"type"];
if (category != nil && ![category isEqualToString:@""] && ![_categories containsObject:category]) {
[[self mutableArrayValueForKey:@"categories"] addObject:category];
}
} else if ([keyPath isEqualToString:@"accountType"]) {
// the account type has changed in one of the transactions. If this is an accountType we haven't seen before, add it to _accountTypes
NSString *accountType = [object valueForKeyPath:@"accountType"];
if (accountType != nil && ![accountType isEqualToString:@""] && ![_accountTypes containsObject:accountType]) {
[[self mutableArrayValueForKey:@"accountTypes"] addObject:accountType];
}
}
}
- (void)insertObjects:(NSArray *)objects inTransactionsAtIndexes:(NSIndexSet *)indexes {
// use the mutable array proxy so key-value observers (eg transactionsController) get notified of the change
[[self mutableArrayValueForKey:@"transactions"] insertObjects:objects atIndexes:indexes];
}
- (void)removeObjectsFromTransactionsAtIndexes:(NSIndexSet *)indexes {
// use the mutable array proxy so key-value observers (eg transactionsController) get notified of the change
[[self mutableArrayValueForKey:@"transactions"] removeObjectsAtIndexes:indexes];
}
- (void)addObserversForKeyPathsInTransactions:(NSArray *)newTransactions {
NSIndexSet *allIndexes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [newTransactions count])];
// start observing "amount" in transactions that have been added so we can know when any amount changes
[newTransactions addObserver:self toObjectsAtIndexes:allIndexes forKeyPath:@"amount" options:0 context:NULL];
// start observing "type" so we can know when a new type is added
[newTransactions addObserver:self toObjectsAtIndexes:allIndexes forKeyPath:@"type" options:0 context:NULL];
// start observing "accountType" so we can know when a new accountType is added
[newTransactions addObserver:self toObjectsAtIndexes:allIndexes forKeyPath:@"accountType" options:0 context:NULL];
}
- (void)removeObserversForKeyPathsInTransactions:(NSArray *)oldTransactions {
NSIndexSet *allIndexes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [oldTransactions count])];
// stop observing "amount" in transactions that have been removed
[oldTransactions removeObserver:self fromObjectsAtIndexes:allIndexes forKeyPath:@"amount"];
// stop observing "type"
[oldTransactions removeObserver:self fromObjectsAtIndexes:allIndexes forKeyPath:@"type"];
// stop observing "accountType"
[oldTransactions removeObserver:self fromObjectsAtIndexes:allIndexes forKeyPath:@"accountType"];
}
// transaction accessors
- (NSArray *)transactions {
// always return an array. Create an empty one if need be, since it is incorrect to return nil from a collection accessor.
if (!_transactions) {
_transactions = [[NSMutableArray alloc] init];
}
return [[_transactions retain] autorelease];
}
- (void)setTransactions:(NSMutableArray *)transactions
{
if (_transactions != transactions)
{
[_transactions release];
_transactions = [transactions mutableCopy];
}
}
// categories accessor
- (void)setCategories:(NSMutableArray *)categories
{
if (_categories != categories)
{
[_categories release];
_categories = [categories mutableCopy];
}
}
// accountTypes accessor
- (void)setAccountTypes:(NSMutableArray *)accountTypes
{
if (_accountTypes != accountTypes)
{
[_accountTypes release];
_accountTypes = [accountTypes mutableCopy];
}
}
// action methods
/* Note: In a more complicated application there could be more than one window per document. In that case, these action methods would go in the custom window controller. Then, this NSDocument subclass would not even need a connection to the array controller.
*/
- (void)add:(id)sender {
[_transactionController add:sender];
}
- (void)delete:(id)sender {
[_transactionController remove:sender];
}
// saving and opening documents
#define kOpeningBalance @"Opening Balance"
#define kTransactions @"Transactions"
#define kAccountTypes @"AccountTypes"
#define kCategories @"Categories"
- (NSString *)windowNibName
{
return @"MyDocument";
}
- (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError;
{
if ([typeName isEqualToString:kSpendDocumentType]) {
NSData *data;
NSMutableDictionary *doc = [NSMutableDictionary dictionary];
NSString *errorString;
[doc setObject:[NSNumber numberWithFloat:_openingBalance] forKey:kOpeningBalance];
[doc setObject:[NSKeyedArchiver archivedDataWithRootObject:_transactions] forKey:kTransactions];
[doc setObject:[NSKeyedArchiver archivedDataWithRootObject:_categories] forKey:kCategories];
[doc setObject:[NSKeyedArchiver archivedDataWithRootObject:_accountTypes] forKey:kAccountTypes];
data = [NSPropertyListSerialization dataFromPropertyList:doc format:NSPropertyListXMLFormat_v1_0 errorDescription:&errorString];
if (!data) {
if (!outError) {
NSLog(@"dataFromPropertyList failed with %@", errorString);
} else {
NSDictionary *errorUserInfo = [NSDictionary dictionaryWithObjectsAndKeys:@"iSpend document couldn't be written", NSLocalizedDescriptionKey, (errorString ? errorString : @"An unknown error occured."), NSLocalizedFailureReasonErrorKey, nil];
// In this simple example we know that no one's going to be paying attention to the domain and code that we use here.
*outError = [NSError errorWithDomain:@"iSpendErrorDomain" code:-1 userInfo:errorUserInfo];
}
[errorString release];
}
return data;
} else {
*outError = [NSError errorWithDomain:@"iSpendErrorDomain" code:-1 userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Unsupported data type: %@", typeName] forKey:NSLocalizedFailureReasonErrorKey]];
}
return nil;
}
- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError;
{
BOOL result = NO;
if ([typeName isEqualToString:kSpendDocumentType]) {
NSString *errorString;
NSDictionary *documentDictionary = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable format:NULL errorDescription:&errorString];
if (documentDictionary) {
[self setOpeningBalance:[[documentDictionary objectForKey:kOpeningBalance] floatValue]];
[self setTransactions:[NSKeyedUnarchiver unarchiveObjectWithData:[documentDictionary objectForKey:kTransactions]]];
[self setCategories:[NSKeyedUnarchiver unarchiveObjectWithData:[documentDictionary objectForKey:kCategories]]];
[self setAccountTypes:[NSKeyedUnarchiver unarchiveObjectWithData:[documentDictionary objectForKey:kAccountTypes]]];
result = YES;
} else {
if (!outError) {
NSLog(@"propertyListFromData failed with %@", errorString);
} else {
NSDictionary *errorUserInfo = [NSDictionary dictionaryWithObjectsAndKeys: @"iSpend document couldn't be read", NSLocalizedDescriptionKey, (errorString ? errorString : @"An unknown error occured."), NSLocalizedFailureReasonErrorKey, nil];
*outError = [NSError errorWithDomain:@"iSpendErrorDomain" code:-1 userInfo:errorUserInfo];
}
[errorString release];
result = NO;
}
} else {
// if we are asked to read an unrecognized type, we should really return that information in outError
result = NO;
}
// we don't want any of the operations involved in loading the new document to mark it as dirty, nor should they be undo-able, so clear the undo stack
[[self undoManager] removeAllActions];
return result;
}
@end
</pre>
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