date:20090508

Not much of an iPhone dev, but have you checked where you are when the
debugger kicks in?  `where` in the the gdb console or just looking at
the Debugger panel (or the status bar) will usually tell you.  From
the empty debug console it sounds like you're breaking on
objc_exception_throw and just not noticing it; if you are, single-step
through the program until it prints out the exception to the console.

--Kyle Sluder
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Re: ViewControllers and window nibs

2009-05-08 Thread Derek Chesterfield



On 6 May 2009, at 21:01, jonat...@mugginsoft.com wrote:


See the following for hints on binding across nibs.
http://homepage.mac.com/mmalc/CocoaExamples/controllers.html


I have a *vaguely* similar question: In IB, is it possible to connect  
an object in one NIB to an outlet in another NIB? Dragging a  
connection in IB across NIBs doesn't seem to work, so I suspect it is  
not possible??


PS: I know other solutions, e.g. code or bindings, but I am just  
wondering why I can't do it in IB...


Dez
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problem with NSTimer

2009-05-08 Thread Kiran Kumar S

	according to documentation for  
beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo: it  
says that While the application is in the run loop, it does not  
respond to any other events (including mouse, keyboard, or window- 
close events) unless they are associated with the sheet. It also does  
not perform any tasks (such as firing timers) that are not associated  
with the modal run loop.
	But in my app the timer i had created fires even my main window is in  
running as Modal


- (id)init
{
self = [super init];
if (self) {
	timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self  
selector:@selector(timerPinged:) userInfo:nil repeats:YES];

}
return self;
}

-(void)timerPinged:(NSTimer*)timere
{
NSLog(@timer pinged);
}
-(IBAction)raiseSheet:(id)sender
{
[NSApp beginSheet:syncPanel modalForWindow:window  
modalDelegate:nil didEndSelector:nil contextInfo:nil];

}   

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Re: ViewControllers and window nibs

On Fri, May 8, 2009 at 5:51 AM, Derek Chesterfield d...@mac.com wrote:
 I have a *vaguely* similar question: In IB, is it possible to connect an
 object in one NIB to an outlet in another NIB? Dragging a connection in IB
 across NIBs doesn't seem to work, so I suspect it is not possible??

No, it's not.

 PS: I know other solutions, e.g. code or bindings, but I am just wondering
 why I can't do it in IB...

Because it doesn't make sense.  While things within a nib are
reconstituted together, there's no logical relationship between two
nibs.  You might instantiate a nib dozens of times (think of your
document nib) but only instantiate other nibs once (think your main
menu nib).  What sense would it make to wire things up between the
nibs?  And how would IB know that it doesn't make sense?

--Kyle Sluder
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iPhone how to suppress phone dialer screen

2009-05-08 Thread Shraddha Karwan

Hi,

I am writing an application which is in landscape mode. It dials a phone
number using the tel protocol. While dialing the standard iPhone dialer
screen pops up. Is there any means by which this screen can be suppressed?
Or how can I make this screen device orientation aware?
Is there any other means by which the same can be achieved without using the
tel protocol?
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Re: iPhone how to suppress phone dialer screen

2009-05-08 Thread Gwynne Raskind


On May 8, 2009, at 7:35 AM, Shraddha Karwan wrote:

Hi,

I am writing an application which is in landscape mode. It dials a  
phone
number using the tel protocol. While dialing the standard iPhone  
dialer
screen pops up. Is there any means by which this screen can be  
suppressed?

Or how can I make this screen device orientation aware?
Is there any other means by which the same can be achieved without  
using the

tel protocol?


Please don't suppress the standard dialer screen. As long as it  
remains, the user has no doubt about what you're doing, and how to  
interact with the interface.


It would worry me if there *was* a way to suppress it. Control of the  
device belongs to the user, and providing a single funnel interface  
(the tel: protocol and its associated UI) to the dialing system brings  
us one step closer to assuring that.


-- Gwynne, Daughter of the Code
This whole world is an asylum for the incurable.

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Re: iPhone how to suppress phone dialer screen

2009-05-08 Thread Shraddha Karwan

On Fri, May 8, 2009 at 5:16 PM, Gwynne Raskind gwy...@darkrainfall.orgwrote:


 Please don't suppress the standard dialer screen. As long as it remains,
 the user has no doubt about what you're doing, and how to interact with the
 interface.

 It would worry me if there *was* a way to suppress it. Control of the
 device belongs to the user, and providing a single funnel interface (the
 tel: protocol and its associated UI) to the dialing system brings us one
 step closer to assuring that.

 -- Gwynne, Daughter of the Code
 This whole world is an asylum for the incurable.



Thanks for the response.
So is there any means by which I can change the orientation of the dialer
when the device orientation changes?
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Re: Custom NSImageView

2009-05-08 Thread Livio Isaia


Corbin Dunn ha scritto:


On May 7, 2009, at 8:16 AM, Livio Isaia wrote:

I create MyImageView (from NSImageView) which must use MyImageCell 
(from NSImageCell).
I put MyImageView in MyWindow with Interface Builder, creating an 
NSImageView and setting its class to MyImageView.




The cell is encoded in the nib. You can change it by double clicking 
on the MyImageView in IB to select the cell. Then change the class to 
MyImageCell in the info window of IB.


corbin



Sorry, but I tried to double click on MyImageView in IB but nothing 
happens, the attributes inspector for it remains the same and doesn't 
show any choice about the cell.

Perhaps I misunderstand you?

thanks,
regards,
livio.
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Re: iPhone how to suppress phone dialer screen

2009-05-08 Thread glenn andreas



On May 8, 2009, at 6:59 AM, Shraddha Karwan wrote:

On Fri, May 8, 2009 at 5:16 PM, Gwynne Raskind gwy...@darkrainfall.org 
wrote:



Please don't suppress the standard dialer screen. As long as it  
remains,
the user has no doubt about what you're doing, and how to interact  
with the

interface.

It would worry me if there *was* a way to suppress it. Control of the
device belongs to the user, and providing a single funnel interface  
(the
tel: protocol and its associated UI) to the dialing system brings  
us one

step closer to assuring that.

-- Gwynne, Daughter of the Code
This whole world is an asylum for the incurable.




Thanks for the response.
So is there any means by which I can change the orientation of the  
dialer

when the device orientation changes?


You should check/ask on the official iPhone developer forums: http://devforums.apple.com/ 
 where issues like this have been discussed in the past.




Glenn Andreas  gandr...@gandreas.com
The most merciful thing in the world ... is the inability of the human  
mind to correlate all its contents - HPL


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Re: iPhone how to suppress phone dialer screen

2009-05-08 Thread Conrad Taylor

On Fri, May 8, 2009 at 4:59 AM, Shraddha Karwan
shraddha.kar...@gmail.comwrote:

On Fri, May 8, 2009 at 5:16 PM, Gwynne Raskind gwy...@darkrainfall.org
wrote:

Please don't suppress the standard dialer screen. As long as it remains,
the user has no doubt about what you're doing, and how to interact with
the
interface.

It would worry me if there *was* a way to suppress it. Control of the
device belongs to the user, and providing a single funnel interface (the
tel: protocol and its associated UI) to the dialing system brings us one
step closer to assuring that.

-- Gwynne, Daughter of the Code
This whole world is an asylum for the incurable.

Thanks for the response.
So is there any means by which I can change the orientation of the dialer
when the device orientation changes?

You should never change the orientation of the dialer. Why?
The receiver is
at the top of the device and transmitter (i.e. mic) is at the bottom of the
device.
Thus, when one answers a call or makes a call, the phone will be in
portrait
orientation. Please don't try to implement feature(s) that violates the
user
experience on the iPhone. Thus, I would highly recommend reading the
following:

iPhone Human Interface
Guidelineshttp://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/MobileHIG/index.html

Good luck,

-Conrad
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quick and dirty NSData implosion

2009-05-08 Thread Jon

so far,  what i've determined by dumbing this down,   is that I must  
be doing something inherently bad and nubi like here...
the run time just completely implodes when it gets to the NSData  
line of code

any help would be great,   thanks in advance.
the BookMark  is just a class with the 3 items that you can see  
below in it,  and then uses the @property and @synthesize routines to  
set the setter and getter,  there is nothing else in the class.
I suspect that NSData's keyedArchiver is not expecting a mutable  
thing?   but NSUserDefaults only takes immutable things.


NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
BookMark *theBookMark = [[BookMark alloc] init];
NSString *theurl = @http:/.anything.com/;

	NSMutableDictionary *bookMarkList = [[NSMutableDictionary alloc]  
initWithCapacity: 9];


bookMarkCount++;

[theBookMark setBookMarkCount:bookMarkCount];
[theBookMark setBookMarkurlString:theurl];
[theBookMark setBookMarkTitle:[docTitle substringToIndex:100]];

	NSString *countString = [NSString stringWithFormat:@%d,  
bookMarkCount];


[bookMarkList setObject:theBookMark forKey:countString];

	NSData *bookMarkdata = [NSKeyedArchiver  
archivedDataWithRootObject:bookMarkList];


[defaults setObject:bookMarkdata forKey:PECBookMarkListKey];

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Re: quick and dirty NSData implosion

2009-05-08 Thread Alexander Spohr



Am 08.05.2009 um 15:25 schrieb Jon:


but NSUserDefaults only takes immutable things.


Why do you think that? Did you try?

From the documentation:
value
The object to store in the defaults database. A default’s value can be  
only property list objects: NSData, NSString, NSNumber, NSDate,  
NSArray, or NSDictionary.


An NSMutableDictionary is a subclass of NSDictionary. Why should it be  
illegal to throw it in there? It is still an NSDictionary.

The important part is that it must be a property list object.

atze


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Re: NSXMLParser frees itself on error?

2009-05-08 Thread Michael Ash

On Fri, May 8, 2009 at 1:43 AM, Marcel Weiher marcel.wei...@gmail.com wrote:

 On May 7, 2009, at 21:12 , Michael Ash wrote:

 On Thu, May 7, 2009 at 11:53 PM, Marcel Weiher marcel.wei...@gmail.com
 wrote:

 On May 7, 2009, at 17:29 , Jeff Johnson wrote:

 On May 7, 2009, at 6:00 PM, Marcel Weiher wrote:

 That's not what I was talking about. I was talking about the
 possibility
 that the 'owned' caller manually runs the run loop right after it
 calls the
 delegate callback, so any performSelector: called by the delegate will
 be
 performed after the delegate callback returns but within the scope of
 the
 caller. How do you protect against that?

 *I* don't.  It is you who wants these sorts of guarantees and
 protections.  I code in ways that don't assume these sorts of
 protections.

 How?

 Begin forwarded message:

 From: Marcel Weiher marcel.wei...@gmail.com
 Date: May 7, 2009 10:05:29  PDT

 And yes, the code that I use explicitly runs the runloop, and it is the
 code that runs the runloop that both allocates the NSURLConnection and
 then
 cleans up after it checks the flag.  Perfectly safe, perfectly
 synchronous.

 And what about the *a*synchronous case?

 That *was* the asynchronous case, which I then proceeded to make
 synchronous.

Which means it's synchronous. How would you handle an asynchronous connection?

Mike
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Re: problem with NSTimer

2009-05-08 Thread Michael Ash

On Fri, May 8, 2009 at 5:51 AM, Kiran Kumar S
kirankuma...@prithvisolutions.com wrote:
        according to documentation for
 beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo: it says
 that While the application is in the run loop, it does not respond to any
 other events (including mouse, keyboard, or window-close events) unless they
 are associated with the sheet. It also does not perform any tasks (such as
 firing timers) that are not associated with the modal run loop.
        But in my app the timer i had created fires even my main window is in
 running as Modal

The documentation is completely broken here. That's not how sheets
work. Sheets only block events to the window they are associated with.
Events to other windows work just fine. You can see this by bringing
up the standard save sheet in, say, TextEdit, and observing how you
can still create new documents, edit other open documents, etc. As
such, the fact that timer still fire is completely expected. I
recommend you file a bug against the documentation. It seems that they
did a copy/paste job from the -runModalForWindow: method despite the
fact that they work nothing alike.

Mike
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Re: quick and dirty NSData implosion

2009-05-08 Thread jon

yes i did try,   i would send the data,  and nothing would show up in  
the property list file.
but there would be no crash, no error,   nothing,  but no results  
either.   so after reading the same documentation you also saw,   I  
assumed it had to be NSDictionary, rather than NSMutableDictionary.
It is most likely the wrong assumption,  but i could get nothing from  
the line of code below.


here is the line i used...  simply substituting this in,  instead of  
the NSData stuff,   and atleast it doesn't crash and burn...  but it  
also produces nothing in the property list.


[defaults setObject:bookMarkList forKey:PECBookMarkListKey];

so again, I must be doing something fundamentally wrong here?

this also does not explain why the NSData line of code would implode,   
even if my assumption was wrong in that case,  something else must  
also be wrong there.

Jon.


On May 8, 2009, at 7:39 AM, Alexander Spohr wrote:


Why do you think that? Did you try?


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HFS Format API?

2009-05-08 Thread iseecolors


Is there a Cocoa/Core Foundation (or ___) API for formatting a Volume?

Rich Collyer

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Re: quick and dirty NSData implosion

2009-05-08 Thread John Cebasek


Why don't you do something like this:

@try
{
  [defaults setObject:bookMarkList forKey:PECBookMarkListKey];
}
@catch (NSException *e)
{
NSLog(@NSData blew up because: %@, [e reason]);
}

and find out what the error is?

John
On 8-May-09, at 9:56 AM, jon wrote:

yes i did try,   i would send the data,  and nothing would show up  
in the property list file.
but there would be no crash, no error,   nothing,  but no results  
either.   so after reading the same documentation you also saw,   I  
assumed it had to be NSDictionary, rather than  
NSMutableDictionary.   It is most likely the wrong assumption,  but  
i could get nothing from the line of code below.


here is the line i used...  simply substituting this in,  instead of  
the NSData stuff,   and atleast it doesn't crash and burn...  but it  
also produces nothing in the property list.


[defaults setObject:bookMarkList forKey:PECBookMarkListKey];

so again, I must be doing something fundamentally wrong here?

this also does not explain why the NSData line of code would  
implode,  even if my assumption was wrong in that case,  something  
else must also be wrong there.

Jon.


On May 8, 2009, at 7:39 AM, Alexander Spohr wrote:


Why do you think that? Did you try?


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Re: Associating Objective-C objects with Java objects using JNI

2009-05-08 Thread Scott Ribe

It can certainly be done; I did something exactly analogous ~7 years ago for
C++  Carbon. Basically, you can use the JNI to instantiate a Java runtime
instance within your program, then use JNI to call through to Java object
instances. Backing out a bit, you can create your own proxy classes whose
instances hold a reference to a Java object, and have methods that mirror
those of the Java object, and just delegate to the Java object via the JNI.
Backing out one more step, you can use reflection to automatically generate
a wrapper class for any Java class. Backing out one more step, for a given
Javan class, you can generate wrapper classes for any Java class returned by
or taken as an argument by a method of that class, recursively. As for
memory management, your proxies would be reference-counted like normal
Objective-C instances, and on dealloc they would release their Java delegate
objects.

There's some work involved, that's for sure. But it's really not all that
complicated. One suggestion specific to your stated plan: forget any special
annotations for methods, just generate methods in the Objective-C proxy for
all methods in the Java class.

-- 
Scott Ribe
scott_r...@killerbytes.com
http://www.killerbytes.com/
(303) 722-0567 voice


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Re: quick and dirty NSData implosion

2009-05-08 Thread Alexander Spohr



Am 08.05.2009 um 15:56 schrieb jon:


[defaults setObject:bookMarkList forKey:PECBookMarkListKey];

so again, I must be doing something fundamentally wrong here?


Yes. Your BookMark-instance is not a property list object. So you  
could store the NSMutableDictionary, but it holds an illegal object.  
Therefore the defaults will ignore it.


this also does not explain why the NSData line of code would  
implode,  even if my assumption was wrong in that case,  something  
else must also be wrong there.


I can not see a problem at first glace. Maybe you could provide a  
stack trace? Implode is a bit vague :)


atze

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Re: Cancel NSThread - cocoa/mysql database search...

2009-05-08 Thread spartan g

Thanks...

I tried both the ways as Bill and Mike suggested.
I could manage to cancel the thread by checking the bool flag for
cancellation.
It works fine.

But the problem I am facing now is, once i sent the query to MySQL through
SMySQL framework, I am unable to cancel it. This query takes so much time to
return the results and cannot be canceled as far as I understand.
Is there any way to cancel this query??? any command or API!!!

Once again Thanks guys...

--
Best Regards,
Sparta...


On Wed, May 6, 2009 at 9:34 PM, Bill Bumgarner b...@mac.com wrote:

 On May 6, 2009, at 8:22 AM, Sparta wrote:

 I am working on cocoa – MySQL application that connects to the MySQL
 database and retrieves the records.
 I run the search in a NSThread. I wish to cancel the search if needed, as
 the searching of the desired data takes 15-20 minutes due to the bigger
 size
 of database.

 Please suggest some method which can cancel / exit the NSThread from the
 parent thread.


 Something like this:

 
BOOL stopItMan;
 

 - (void) doSomePotentiallyLongWindedStuffOnASecondThread
 {
while (!stopItMan) {
 do some more stuff 
};
 }

 - (void) userIsImpatientStopItNow
 {
stopItMan = YES;
 }

 Don't do something like this (which is possible and would require calling
 through to some bits of lower level mach or pthread API):

 - (void) userIsImpatientStopItNow
 {
nukeBackgroundThreadFromSpace();
 }

 You can't kill a thread arbitrarily as there is no way to know what state
 the thread might be in when you kill it unless you do the work necessary to
 cause the targeted thread to be blocked at a known safe point in its
 execution.   However, if the thread is blocked at a known safe point, that
 known safe point can just as easily be a test to see if should continue,
 exiting safely if not.
 b.bum
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Re: quick and dirty NSData implosion

2009-05-08 Thread Dave DeLong

And just to make sure... your Bookmark class does implement NSCoding,  
correct?  That's required by NSKeyedArchiver.


Dave

On May 8, 2009, at 8:05 AM, Alexander Spohr wrote:



Am 08.05.2009 um 15:56 schrieb jon:


[defaults setObject:bookMarkList forKey:PECBookMarkListKey];

so again, I must be doing something fundamentally wrong here?


Yes. Your BookMark-instance is not a property list object. So you  
could store the NSMutableDictionary, but it holds an illegal object.  
Therefore the defaults will ignore it.


this also does not explain why the NSData line of code would  
implode,  even if my assumption was wrong in that case,  something  
else must also be wrong there.


I can not see a problem at first glace. Maybe you could provide a  
stack trace? Implode is a bit vague :)


atze

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Re: quick and dirty NSData implosion

2009-05-08 Thread Dave DeLong

Not quite.  It can if it's encoded first (with something like  
NSKeyedArchiver, and it can only be archived if it conforms to NSCoding.


Dave

On May 8, 2009, at 8:14 AM, Keary Suska wrote:


...your BookMark class cannot be stored in defaults...

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RE: Distributed Objects via Bonjour?

2009-05-08 Thread Kirk Kerekes

Good DO demo code is rather scarce, and the best-practices are highly  
dependent on the target OS.


For one example showing about every permutation imaginable, and a  
little-recognized simplified Bonjour strategy, try:


http://thotzy.com/THOTZY/Distributed_Objects_Demo.html

The demo builds an app that lets you do intra and inter Mac DO, and  
explores several threading strategies.



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Re: quick and dirty NSData implosion

2009-05-08 Thread Dave DeLong

This is a clear indication that your BookMark class does not conform  
to NSCoding.  Check the docs on what NSCoding is and how to use it.   
If you implement the two required methods (initWithCoder: and  
encodeWithCoder:), your code should work just fine.


Dave

On May 8, 2009, at 8:35 AM, jon wrote:

NSData blew up because: *** -[BookMark encodeWithCoder:]:  
unrecognized selector sent to instance 0x1f900a40

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Re: quick and dirty NSData implosion

2009-05-08 Thread Alexander Spohr



Am 08.05.2009 um 16:35 schrieb jon:

 NSData blew up because: *** -[BookMark encodeWithCoder:]:  
unrecognized selector sent to instance 0x1f900a40


So what are you asking for? It’s right there in your face:
Your BookMark does not implement encodeWithCoder: an is therefore not  
NSCoding compliant.

Just what Dave said.
Implement it and it should work.

atze

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Re: quick and dirty NSData implosion

2009-05-08 Thread jon

sorry, I am getting emails out of order because i'm using the option  
that sends list in a bundle,  so getting the ones that reply directly  
to me first,  so  i am looking for Dave's answer now...

thanks,
Jon.

On May 8, 2009, at 8:40 AM, Alexander Spohr wrote:


So what are you asking for? It’s right there in your face:
Your BookMark does not implement encodeWithCoder: an is therefore  
not NSCoding compliant.

Just what Dave said.
Implement it and it should work.


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NSApplication and command line args

2009-05-08 Thread Brian Arnold


Hi,

For those of you familiar with handling command line arguments with an
NSApplication, I am requesting a reality-check whether I am
understanding the following problem correctly, and whether the
proposed solution makes sense.  Please reply directly to me off-line
unless you believe the answer to be of public value, thanks!

I have recently converted an application which processes command line
arguments to call NSApplicationMain when it starts up, and defer
command line processing until later in a separate thread.  The
deferred command line processing still works; however, I am seeing a
new behavior where, in some circumstances, NSApplication is passing
certain arguments to openFiles, which is undesirable.  For example,
there may be a command line argument '-logfile /foo/bar', where '/foo/
bar' is also being passed to openFiles.

My proposed solution is to detect when an argument is being passed to
openFiles during startup (i.e., when the arguments are being
processed), and filter it out.  I do this by using a boolean flag
which is initialized to false and set to true when
applicationDidFinishLaunching is called on my delegate.  If openFiles
is called when sIsRunning is false, I perform this extra check if it's
on the command line and ignore it if it is.

namespace {
bool sIsRunning = false;
};

bool isFileNameCommandLineArgument(NSString *fileName)
{

bool found = false;

// If we are called while starting up, we need to filter out any
fileNames which match a
// command line argument. This is because -display and -logfile
parameters will cause NSApplication
// to call handleOpenDocument, which is not the desired behavior.
// Once started up, we don't attempt to filter.
if (!sIsRunning)
{
const char* fileNameCStr = [fileName cStringUsingEncoding:
NSASCIIStringEncoding];

char **argv = *_NSGetArgv();
for (int i = 0; argv[i] != NULL; ++i)
{
// Only check non-zero length non-leading-dash arguments
if (argv[i][0]  0  argv[i][0] != '-' 
strcmp(fileNameCStr, argv[i]) == 0)
{
found = true;
}
}
}
return found;
}

In my application delegate, implement applicationDidFinishLaunching
and filter file names in openFiles:

- (void) applicationDidFinishLaunching:(NSNotification *)aNotification
{
sIsRunning = true;
}

- (void)application:(NSApplication *)sender openFiles:(NSArray
*)filenames
{
NSUInteger i;
for( i = 0; i  [filenames count]; i++)
{
NSString *fileName = [filenames objectAtIndex: i];

if (!isFileNameCommandLineArgument(fileName))
{
handleOpenDocument(fileName);
}
}
}

This appears to resolve the problem.  Did I understand the problem
correctly, and is this the best way to keep openFiles from opening
files which happen to be passed as command line arguments?  Are there
other avenues/methods I should explore?

- Brian

  Mac Developer
  The MathWorks, Inc.
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Converting NSString to C++ std::string

2009-05-08 Thread Andrew Wood

Im using a library which requires arguments to be C++ std::strings,  
but I need to take the value from an NSTextField.


I thought I could do it like this:



std::string mycppstring;
.
.
.
mycppstring = std::string([[myNSTextField stringValue] UTF8String]);


But it keeps crashing. What's the recommended way?

Thanks
Andrew
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NSXMLNode bug in method XMLString

2009-05-08 Thread Kenneth Chin-Purcell

I am a long time programmer returning to Mac development, so pardon if  
I'm not following protocol.  I submitted this bug to the Apple Bug  
Reporter (id 6693016) about two months ago and it's just been sitting  
there with no response.  From my searching of the archives it seems  
that no-one has reported this, so I'm submitting it here so at least  
some other people can find it via Google.


The XMLString method of NSXMLNode gets it wrong for a NSNumber object,  
set as an object, that is a simple power of ten.  This bit me while  
writing code to export data.


Here is a nice compact demo of the bug:

#import Foundation/Foundation.h

int main (int argc, const char * argv[])
{
// Garbage collection required

NSNumber *numberOneHundred = [NSNumber numberWithDouble:100.0];
NSNumber *numberOneHundredAndSmidge = [NSNumber numberWithDouble: 
100.01];


NSXMLElement *nodeGood1 = [NSXMLNode  
elementWithName:@Percentage stringValue:[numberOneHundred  
stringValue]];
NSXMLElement *nodeGood2 = [NSXMLNode  
elementWithName:@Percentage stringValue:[numberOneHundredAndSmidge  
stringValue]];
NSXMLElement *nodeGood3 = [NSXMLNode  
elementWithName:@Percentage];

[nodeGood3 setObjectValue:numberOneHundredAndSmidge];

NSXMLElement *nodeError = [NSXMLNode  
elementWithName:@Percentage];

[nodeError setObjectValue:numberOneHundred];

NSLog(@Good1: %@, [nodeGood1 XMLString]);
NSLog(@Good2: %@, [nodeGood2 XMLString]);
NSLog(@Good3: %@, [nodeGood3 XMLString]);
NSLog(@Error: %@, [nodeError XMLString]);

return 0;
}


Produces (XCode 3.1.2, OS X 10.5):

2009-03-17 21:28:15.002 XMLWriteBug[22663:10b] Good1: Percentage100/ 
Percentage
2009-03-17 21:28:15.013 XMLWriteBug[22663:10b] Good2:  
Percentage100.01/Percentage
2009-03-17 21:28:15.015 XMLWriteBug[22663:10b] Good3:  
Percentage1.0001E2/Percentage
2009-03-17 21:28:15.015 XMLWriteBug[22663:10b] Error:  
Percentage10E2/Percentage



Notice that last line should be 1.0E2 or 1E2 or 10E1, but not 10E2

-- Ken Chin-Purcell
Bungalow Pottery
k...@bungalowpottery.com

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NSString to bit pattern

2009-05-08 Thread erappy

Hi, I am trying to find  way to convert the NSString object into its bit
pattern and convert that bit pattern into another NSString object,
For Example if I have
NSString *origStr = @Hello:
NSString * bitPatternoforigStr ;
no I want to convert it to the bit pattern if Hello and return an object of
type NSString with bit pattern.
it should be something like;
bitPatternoforigStr = @01011010011000100100110101100101 ;
Can someone help me in this.
Thanks,
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RE: problem with NSTimer

2009-05-08 Thread Gopinath Srinivasan

I am guessing you will have to configure your runloop in the appropriate mode 
(see NSRunLoop, and Run Loop Management in the docs), to specify the behavior 
of your timers.

Hope that helped,
~Gopinath


-Original Message-
From: cocoa-dev-bounces+gopinath=adobe@lists.apple.com 
[mailto:cocoa-dev-bounces+gopinath=adobe@lists.apple.com] On Behalf Of 
Kiran Kumar S
Sent: Friday, May 08, 2009 3:21 PM
To: Apple Mailing Mailing
Subject: problem with NSTimer

according to documentation for
beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo: it
says that While the application is in the run loop, it does not
respond to any other events (including mouse, keyboard, or window-
close events) unless they are associated with the sheet. It also does
not perform any tasks (such as firing timers) that are not associated
with the modal run loop.
But in my app the timer i had created fires even my main window is in
running as Modal

- (id)init
{
 self = [super init];
 if (self) {
timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self
selector:@selector(timerPinged:) userInfo:nil repeats:YES];
 }
 return self;
}

-(void)timerPinged:(NSTimer*)timere
{
 NSLog(@timer pinged);
}
-(IBAction)raiseSheet:(id)sender
{
 [NSApp beginSheet:syncPanel modalForWindow:window
modalDelegate:nil didEndSelector:nil contextInfo:nil];
}

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Re: Converting NSString to C++ std::string

2009-05-08 Thread vinai

--- On Thu, 5/7/09, Andrew Wood ajw...@iee.org wrote:

 From: Andrew Wood ajw...@iee.org
 Subject: Converting NSString to C++ std::string
 To: Cocoa-dev@lists.apple.com
 Date: Thursday, May 7, 2009, 4:38 PM
 Im using a library which requires
 arguments to be C++ std::strings, but I need to take the
 value from an NSTextField.

 I thought I could do it like this:

 std::string mycppstring;
 .
 .
 .
 mycppstring = std::string([[myNSTextField stringValue]
 UTF8String]);

 But it keeps crashing. What's the recommended way?

Try:

[thisOptionNSString cStringUsingEncoding: NSASCIIStringEncoding]

where thisOptionNSString is of NSString * type, and has already been properly 
initialized and allocated.

vinai

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Re: NSString to bit pattern

2009-05-08 Thread Greg Guerin


erappy wrote:

Hi, I am trying to find  way to convert the NSString object into  
its bit

pattern and convert that bit pattern into another NSString object,
For Example if I have
NSString *origStr = @Hello:
NSString * bitPatternoforigStr ;
no I want to convert it to the bit pattern if Hello and return an  
object of

type NSString with bit pattern.
it should be something like;
bitPatternoforigStr = @01011010011000100100110101100101 ;
Can someone help me in this.


Break it down.

A string is a sequence of characters.  Retrieve each character,  
determine its bit-pattern, then append that pattern to an  
NSMutableString.  Now you have to figure out how to turn a character  
into its bit-pattern.  So break that down.


A character (or any simple non-floating type) is a sequence of bits.   
If you know the C operators for Boolean AND and SHIFTS ( and  and  
), then you know enough to isolate single bits from a character.   
Then you just test each bit and append either a '0' or '1' character  
to the accumulating NSMutableString.


  -- GG

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Re: Converting NSString to C++ std::string

2009-05-08 Thread Jesper Storm Bache


That should work.
Where are you crashing - and what is your crash log?
My guess is that something else is not right (are you sure that  
myNSTextField is a valid object)?


Jesper Storm Bache

On May 7, 2009, at 2:38 PM, Andrew Wood wrote:


Im using a library which requires arguments to be C++ std::strings,
but I need to take the value from an NSTextField.

I thought I could do it like this:



std::string mycppstring;
.
.
.
mycppstring = std::string([[myNSTextField stringValue] UTF8String]);


But it keeps crashing. What's the recommended way?

Thanks
Andrew
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Re: Converting NSString to C++ std::string

2009-05-08 Thread cocoa learner

Probably you can read this document in following link...
http://developer.apple.com/documentation/Cocoa/Conceptual/Strings/Articles/CreatingStrings.html

This talks about how to C string. And after that you can convert that into a
C++ string object.

On Fri, May 8, 2009 at 9:39 PM, Alexander Spohr a...@freeport.de wrote:

Am 07.05.2009 um 23:38 schrieb Andrew Wood:

mycppstring = std::string([[myNSTextField stringValue] UTF8String]);

But it keeps crashing. What's the recommended way?

Does std::string() copy the char* contents? I guess not (but I don’t use
C++).

See the docs:
UTF8String
Returns a null-terminated UTF8 [...]

Discussion
_The_returned_C_string_is_automatically_freed_ just as a returned object
would be released; you should copy the C string if it needs to store it
outside of the autorelease context in which the C string is created.

Could that be your problem?

atze

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Re: Converting NSString to C++ std::string

2009-05-08 Thread Alex Curylo



On 8-May-09, at 8:55 AM, cocoa-dev-requ...@lists.apple.com wrote:


mycppstring = std::string([[myNSTextField stringValue] UTF8String]);


But it keeps crashing. What's the recommended way?


I have no idea, but it works for me to simply assign it without the  
constructor. Why, here's an example in the file I'm working on right  
now, fancy that:


- (BOOL)willInterceptURL:(NSURL*)url
{
   // copied from the Carbon version since that works
   std::string urlstring = [[url resourceSpecifier] UTF8String];
   ...
}

I've done the same thing all sorts of places grafting shiny Cocoa  
stuff onto old C++ code that works and never noticed any issues.


--
Alex Curylo -- a...@alexcurylo.com -- http://www.alexcurylo.com/

I guess it's pretty bad when you don't start using a new API until
 it's been deprecated. -- Nick Nallick



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Re: Getting the private IP

2009-05-08 Thread Michael Ash

On Fri, May 8, 2009 at 10:46 AM, Mr. Gecko grmrge...@gmail.com wrote:
 Hello, I'm trying to find out how to get the private IP address.

If I understand your code correctly, you're trying to get the loopback
address? No need for all of this, then. The IPv4 loopback address is
127.0.0.1 by definition. The IPv6 loopback address is ::1 by
definition. There is no need to look them up, because they are defined
in the standard and cannot change.

Mike
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Re: [Q] Correct way to identify an application, Launch Services, Spaces

2009-05-08 Thread Eric Schlegel



On May 7, 2009, at 10:40 AM, Eric Gorr wrote:

So, is it the right thing for two versions of the application to  
have the same identifier?


That's the typical approach, although there are lots of apps that  
change their identifier with each release too.


Spaces does identify apps strictly by bundle identifier, so if you  
really want the ability to associate different versions of your app  
with different spaces, then you must change the bundle identifier for  
each application version. By doing that, you'll break any other  
bindings that the user may have specified, for example to have certain  
documents open with your application rather some other app.


-eric

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Re: Converting NSString to C++ std::string

2009-05-08 Thread Clark Cox

On Fri, May 8, 2009 at 8:39 AM, Alexander Spohr a...@freeport.de wrote:

 Am 07.05.2009 um 23:38 schrieb Andrew Wood:

 mycppstring = std::string([[myNSTextField stringValue] UTF8String]);

 But it keeps crashing. What's the recommended way?

 Does std::string() copy the char* contents? I guess not (but I don’t use
 C++).

Yes, it does copy the string. As presented, the OP's code is correct,
and should work. OP: You'll have to provide some more information as
to what is actually going wrong (especially where the crash is
actually happening).

-- 
Clark S. Cox III
clarkc...@gmail.com
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Re: [iPhone] Grouped TableView baffling problem

2009-05-08 Thread Luke the Hiesterman

I would expect that the backtrace will give a clue as to what's going  
on.


Luke

On May 8, 2009, at 1:04 AM, James Lin wrote:


Hi,

I have a table view with 3 grouped sections. Each section contains  
only one item.

There is a baffling problem i don't have a clue what went wrong.

if any one of the single row in any section is selected for the  
first time.

All is well, the correct next view will get pushed without problem.

but if i select the back button and come back to the table view and  
try to select the same or another row.

I get dropped into the debugger with the following message:

Loading program into debugger…
GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40  
UTC 2008)

Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and  
you are
welcome to change it and/or distribute copies of it under certain  
conditions.

Type show copying to see the conditions.
There is absolutely no warranty for GDB.  Type show warranty for  
details.
This GDB was configured as i386-apple-darwin.warning: Unable to  
read symbols for /System/Library/Frameworks/UIKit.framework/ 
UIKit (file not found).
warning: Unable to read symbols from UIKit (not yet mapped into  
memory).
warning: Unable to read symbols for /System/Library/Frameworks/ 
CoreGraphics.framework/CoreGraphics (file not found).
warning: Unable to read symbols from CoreGraphics (not yet mapped  
into memory).

Program loaded.
sharedlibrary apply-load-rules all
Attaching to program: `/Users/linjames/Library/Application Support/ 
iPhone Simulator/User/Applications/541FCE53-8B6A-4878-BD9B- 
FDAE34C62CB1/KindredSpirit.app/KindredSpirit', process 21184.


as you can see, this doesn't help tell me what went wrong...am I  
missing something?


Thank you in advance...

James___

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Not sleeping - Why?

2009-05-08 Thread Trygve Inda

My app is a background app that sends and receives distributed
notifications, reads from a few large mmap'd files and crates a new file
every few minutes (and deletes the old one).

When it is running, the display sleeps, but the system does not. How can I
tell the OS that it is ok to sleep. Since I don't have a GUI, there is never
any user interaction.

Is it not sleeping because I am creating files?

Thanks,

Trygve


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Re: [Q] Correct way to identify an application, Launch Services, Spaces



On May 8, 2009, at 12:38 PM, Eric Schlegel wrote:



On May 7, 2009, at 10:40 AM, Eric Gorr wrote:

So, is it the right thing for two versions of the application to  
have the same identifier?


That's the typical approach, although there are lots of apps that  
change their identifier with each release too.


Spaces does identify apps strictly by bundle identifier, so if you  
really want the ability to associate different versions of your app  
with different spaces, then you must change the bundle identifier  
for each application version. By doing that, you'll break any other  
bindings that the user may have specified, for example to have  
certain documents open with your application rather some other app.


Thank you for this useful information.

My only other question would involve whether or not there would be  
undesirable side-effects by having different identifiers for different  
versions of the application.


Are you (or anyone else) aware of any issues I should be aware of?
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Re: Converting NSString to C++ std::string

2009-05-08 Thread Drew Lawson

According to Alex Curylo:

 
 On 8-May-09, at 8:55 AM, cocoa-dev-requ...@lists.apple.com wrote:
 
  mycppstring = std::string([[myNSTextField stringValue] UTF8String]);
 
 
  But it keeps crashing. What's the recommended way?
 
 I have no idea, but it works for me to simply assign it without the  
 constructor. Why, here's an example in the file I'm working on right  
 now, fancy that:

The only other gotcha I can think of (because it annoys me) is that
std::string does not play nice with null pointers.  Is it possible
that stringValue returns nil?

Hmm, I had one other thought.  There are several std::string
constructors, depending on the parameter type.  In ObjC++, is it
unambiguous at compile time that the expression is const char*?

-- 
Drew Lawson|  We were taking a vote when
   |  the ground came up and hit us.
   |  -- Cylon warrior
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Re: Tri-state Check box

2009-05-08 Thread Arun

In my app, the check box is in the table column and i have binded the value
of table column to a BOOL variable of my model class.
In this case how do i set the Mixed State to a particulat item in the table
column.

Thanks
Arun


On Fri, May 8, 2009 at 1:05 AM, Eric Gorr mail...@ericgorr.net wrote:

 If I understand correctly, when the user changes the state, simply do:

 [myCheckBox setAllowsMixedState:NO];




 On May 7, 2009, at 1:36 PM, Arun wrote:

  Hi All,

 In my application i use check box to represent enable / disable states.
 And
 user is allowed to change the states from enable to disable and vice
 versa.
 Is it possible to represent one more state say modified using the same
 check box? I know if i set the state of the check box to mixed i can
 represent more than 2 states in check box. But My requirement is that, i
 should be able to represent more than two state bu when user changes the
 state, it should be either enable/disable and never  to select modified
 state. Is it possible to achieve this in check box?

 Any idea?

 Thanks
 Arun KA
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Re: iPhone Telephone APIs

2009-05-08 Thread Gwynne Raskind


On May 8, 2009, at 1:03 PM, Luke the Hiesterman wrote:

On May 8, 2009, at 10:00 AM, we...@mindspring.com wrote:
If you feel strongly (like I do) that this functionality should be  
made available, file a bug.  I'm thinking there is a legal reason  
this feature is not enabled, but I am unable to confirm my  
suspicions.
Why do you feel you should be able to interact with a phone call?  
Phone calls on a telephone are inherently (and I would say, clearly)  
the sole domain and responsibility of the telephone operating system.


Telephones that have operating systems... Does anyone remember those  
old rotary assemblages that were mostly mechanical and took up almost  
the same space as a brick of ice cream and had big four-prong plugs?  
THOSE sure as hell didn't have an OS.


I feel old now :).

In any case, it might be more correct to say that phone calls on a  
telephone are ultimately (and conceptually purely) the domain of the  
user. I for one would shudder to think that arbitrary applications on  
my iPhone could interact with the baseband firmware at all, nevermind  
at the level of actually making telephone calls. I hope Apple *never*  
makes this functionality available, ever.


-- Gwynne, Daughter of the Code
This whole world is an asylum for the incurable.
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Re: iPhone Telephone APIs

2009-05-08 Thread Gwynne Raskind

Apologies for the random e-mail from nowhere; I replied to the wrong  
list.


On May 8, 2009, at 1:17 PM, Gwynne Raskind wrote:


On May 8, 2009, at 1:03 PM, Luke the Hiesterman wrote:

On May 8, 2009, at 10:00 AM, we...@mindspring.com wrote:
If you feel strongly (like I do) that this functionality should be  
made available, file a bug.  I'm thinking there is a legal reason  
this feature is not enabled, but I am unable to confirm my  
suspicions.
Why do you feel you should be able to interact with a phone call?  
Phone calls on a telephone are inherently (and I would say,  
clearly) the sole domain and responsibility of the telephone  
operating system.


Telephones that have operating systems... Does anyone remember those  
old rotary assemblages that were mostly mechanical and took up  
almost the same space as a brick of ice cream and had big four-prong  
plugs? THOSE sure as hell didn't have an OS.


I feel old now :).

In any case, it might be more correct to say that phone calls on a  
telephone are ultimately (and conceptually purely) the domain of the  
user. I for one would shudder to think that arbitrary applications  
on my iPhone could interact with the baseband firmware at all,  
nevermind at the level of actually making telephone calls. I hope  
Apple *never* makes this functionality available, ever.


-- Gwynne, Daughter of the Code
This whole world is an asylum for the incurable.
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Re: [Q] Correct way to identify an application, Launch Services, Spaces

On Fri, May 8, 2009 at 12:55 PM, Eric Gorr mail...@ericgorr.net wrote:
 Are you (or anyone else) aware of any issues I should be aware of?

If you expose any scripting interface then people might get frustrated
when their Frobdignag 2008 scripts don't work when they upgrade to
Frobdignag 2009, even though the scripting dictionary hasn't changed.
iTunes changes version number more frequently than most people change
underwear, with the expectation that users only have one version
installed at a time.  I think you should expect the same for your
users and use non-versioned bundle IDs.

--Kyle Sluder
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Re: [Q] Correct way to identify an application, Launch Services, Spaces

2009-05-08 Thread Quincey Morris


On May 8, 2009, at 09:55, Eric Gorr wrote:

My only other question would involve whether or not there would be  
undesirable side-effects by having different identifiers for  
different versions of the application.


Are you (or anyone else) aware of any issues I should be aware of?


Well, for one thing, if you use different bundle identifiers you'll  
have different preferences files, so the applications won't by default  
share the same preferences.


TBH, I don't see the virtue in letting Spaces' behavior be the  
determining factor. If Spaces can't tell the difference between  
application versions with the same bundle identifier, that's a defect  
in Spaces (from your point of view), not a reason for deforming your  
application to gain a small usability feature.


OTOH, if your two versions really have a good reason for existing  
independently (beyond testing and an interim changeover period), then  
what you probably have is two different apps, and different bundle  
identifiers would make sense.



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Re: Tri-state Check box

Wire up a delegate and set the state in willDisplayCell.

--Kyle Sluder

-- 
--Kyle Sluder
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Re: [Q] Correct way to identify an application, Launch Services, Spaces

Thank you Kyle  Quincey for your additional comments. I agree, it  
does not seem to be a good idea to give an application a different  
identifier based on the version changing.


p.s. Anyone know how exactly Spaces builds the string that it uses?

In my actual case, the name of the application showing up in Spaces  
was 'myapp 2008' if that was the application found first in the Launch  
Services Database, but if 'myapp 2009' was launched first, Spaces was  
showing only 'myapp'.


If I look at the Launch Services database, I see:

bundle  id:#
name:  myapp

in both cases. I'm just not sure where Spaces is getting the 'myapp  
2008' string. The info.plist for myapp 2008 does not contain the  
string 'myapp 2008' either.





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Re: Garbage collector related crash

2009-05-08 Thread Bill Bumgarner


On May 8, 2009, at 12:47 AM, Chris Idou wrote:

I've got an object that holds onto a CF ref:

mdref= MDItemCreate(nil, (CFStringRef)path);
[NSMakeCollectable(mdref) autorelease];

I think I'm doing the right thing in the class declaration:


@interface MetadataItem : NSObject {
__strongMDItemRefmdref;
@end

But every now and then:

CFTypeRefres = MDItemCopyAttribute(mdref, (CFStringRef)key);

this makes it crash horribly. It's got to have something to do with  
garbage collection, but it seems like I'm doing things right. Any  
thoughts?


It is broken on Leopard (and fixed in a future release);  please file  
a bug and send me the bug #.   Attach your binary to the bug with  
steps to reproduce.


One workaround for now -- not a very good workaround, but a workaround  
-- is to CFRetain the mdref as soon as you create it.  Then never ever  
CFRelease it.  Yes, it'll leak (fortunately these are small).  But it  
won't crash (unless some other subsystem does code like yours above  
out of your control).


b.bum

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Re: [Q] Correct way to identify an application, Launch Services, Spaces



On May 8, 2009, at 1:40 PM, Quincey Morris wrote:

If Spaces can't tell the difference between application versions  
with the same bundle identifier, that's a defect in Spaces (from  
your point of view), not a reason for deforming your application to  
gain a small usability feature.


If anyone is interested, I have filed a bug report:

  rdar://6870199

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Re: [Q] Correct way to identify an application, Launch Services, Spaces


Never mind.

It was probably just some weird glitch, but with some experimentation,  
Spaces is clearly grabbing the name it shows from the name of the app  
as it appears in the finder.



On May 8, 2009, at 1:51 PM, Eric Gorr wrote:


p.s. Anyone know how exactly Spaces builds the string that it uses?

In my actual case, the name of the application showing up in Spaces  
was 'myapp 2008' if that was the application found first in the  
Launch Services Database, but if 'myapp 2009' was launched first,  
Spaces was showing only 'myapp'.


If I look at the Launch Services database, I see:

bundle  id:#
name:  myapp

in both cases. I'm just not sure where Spaces is getting the 'myapp  
2008' string. The info.plist for myapp 2008 does not contain the  
string 'myapp 2008' either.


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AppleEvents and modal dialogs

2009-05-08 Thread James Walker

I have a mostly-Carbon app that runs some Cocoa modal dialogs using 
-[NSApplication runModalForWindow:].  If an Apple Event (such as 'odoc') 
arrives while such a dialog is showing, it just gets eaten.  I'd like to 
have it either handled or deferred.  I tried creating an NSApplication 
delegate object, but its application:openFile: method doesn't get called.

--
  James W. Walker, Innoventive Software LLC
  http://www.frameforge3d.com/
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Renaming a file repositions icon in Finder

2009-05-08 Thread Jim Turner

It appears that renaming a file will cause the Finder to reposition
the icon for the file if it's currently displayed in a icon view
somewhere.  Is there any way to prevent that from happening?  It looks
very strange to have icons jump all over the place just because of a
rename.

Thinking that it might have been the method with which I was renaming
the file, I tried NSFileManager's moveItemAtPath:toPath:error:,
rename(), and FSRenameUnicode() and all three exhibit the same
problem.

-- 
Jim
http://nukethemfromorbit.com
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Re: NSManagedObjectContext -insertObject: Cancels Prior Deletion -- BUT!

2009-05-08 Thread Jerry Krinock


Conclusion.  Here's what I believe to be the missing documentation...

***

You can use -insertObject: to cancel a prior deletion, however if  
certain operations are performed after the deletion and before the  
restoring -insertObject:, the attributes of the deleted/inserted  
object will all be set to nil.  These certain operations include, but  
may not be limited to,


   -[NSManagedObjectContext executeFetchRequest:error:]
   -[NSManagedObjectContext save:]

Regarding the former, note that the deleted objects need not be (and  
will not be, because they are deleted) included in the fetch results  
in order to have their attributes hosed.


This applies both to explicit deletions performed by -[NSManagedObject  
deleteObject:], and  implicit deletions resulting from the action of a  
Cascade Delete Rule when a related object is deleted.


Because it may be difficult to keep track of when the certain  
operations are going to be performed, re-inserting deleted objects is  
not recommended.


***

I'll file the above as a bug report next week.  Anyone who can further  
clarify, please reply.


For my application, where I am deleting a parent and have children  
cascade-deleted, I added some extra code to make a collection of  
children that I don't want delete before deleting their parents, move  
these children to a temporary foster parent, delete the old parents,  
then move the children to their new parent.


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Re: NSManagedObjectContext -insertObject: Cancels Prior Deletion -- BUT!

2009-05-08 Thread Adam Swift



On May 8, 2009, at 1:00 PM, Jerry Krinock wrote:

Conclusion.  Here's what I believe to be the missing  
documentation...


***

You can use -insertObject: to cancel a prior deletion, however if  
certain operations are performed after the deletion and before the  
restoring -insertObject:, the attributes of the deleted/inserted  
object will all be set to nil.  These certain operations include,  
but may not be limited to,


  -[NSManagedObjectContext executeFetchRequest:error:]
  -[NSManagedObjectContext save:]

Regarding the former, note that the deleted objects need not be (and  
will not be, because they are deleted) included in the fetch results  
in order to have their attributes hosed.





That looks correct and a bug report/documentation enhancement request  
is reasonable, but note that deleted objects will only have their  
attributes cleared if:
	(a) the object is newly inserted (doesn't exist in the persistent  
store) and
	(b) no 'undo tracking event (ie user event)' occurs between the  
creation/insert and subsequent delete.  You can trigger the same  
effect of an undo event boundary by calling processPendingChanges.


- adam

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Re: NSString to bit pattern


On 08 May 09, at 08:47, Greg Guerin wrote:
A string is a sequence of characters.  Retrieve each character,  
determine its bit-pattern, then append that pattern to an  
NSMutableString.  Now you have to figure out how to turn a character  
into its bit-pattern.  So break that down.


One extra complication: By Cocoa's standards, a string is not a  
sequence of bytes: it's a sequence of Unicode codepoints.* To treat a  
string as a bag of bytes, you will first need to choose a text  
encoding to treat the text as, then convert it using the NSString  
dataUsingEncoding: method.


If all you're working with is standard ASCII characters, though, this  
shouldn't be an issue.

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Re: NSApplication and command line args


On 07 May 09, at 12:36, Brian Arnold wrote:

I have recently converted an application which processes command line
arguments to call NSApplicationMain when it starts up, and defer
command line processing until later in a separate thread.  The
deferred command line processing still works; however, I am seeing a
new behavior where, in some circumstances, NSApplication is passing
certain arguments to openFiles, which is undesirable.  For example,
there may be a command line argument '-logfile /foo/bar', where '/foo/
bar' is also being passed to openFiles.

My proposed solution is to detect when an argument is being passed to
openFiles during startup (i.e., when the arguments are being
processed), and filter it out.  I do this by using a boolean flag
which is initialized to false and set to true when
applicationDidFinishLaunching is called on my delegate.  If openFiles
is called when sIsRunning is false, I perform this extra check if it's
on the command line and ignore it if it is.


snip...

A much simpler solution would be to preprocess the arguments which you  
pass to NSApplicationMain. Run through everything in argv, then create  
a new array of arguments from that with all arguments your application  
wants to handle removed and pass that to AppKit.

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Re: Cancel NSThread - cocoa/mysql database search...


On 08 May 09, at 07:08, spartan g wrote:
But the problem I am facing now is, once i sent the query to MySQL  
through
SMySQL framework, I am unable to cancel it. This query takes so much  
time to

return the results and cannot be canceled as far as I understand.
Is there any way to cancel this query??? any command or API!!!


No. The MySQL C API [1] is synchronous, and provides no method to  
cancel a query that's in progress. Indeed, the network protocol  
doesn't either - the only way to stop a query that's running is by  
using the MySQL KILL command to terminate the connection.


If you are ending up with queries that run for 15 to 20 minutes, you  
probably need to do one or more of the following:


 1. Adjust your database schema to make these queries run faster
 2. Fetch smaller chunks of data at a time using the LIMIT modifier  
on queries

 3. Change your application so that it performs more efficient queries

All of these are really outside the scope of Cocoa development,  
though. You may have better results asking on a MySQL-specific mailing  
list or forum.


[1]: http://dev.mysql.com/doc/refman/5.1/en/c.html
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Re: AppleEvents and modal dialogs

2009-05-08 Thread Uli Kusterer


On 08.05.2009, at 21:16, James Walker wrote:
I have a mostly-Carbon app that runs some Cocoa modal dialogs using - 
[NSApplication runModalForWindow:].  If an Apple Event (such as  
'odoc') arrives while such a dialog is showing, it just gets eaten.   
I'd like to have it either handled or deferred.  I tried creating an  
NSApplication delegate object, but its application:openFile: method  
doesn't get called.


 You probably need to install a kEventAppleEvent Carbon Event Handler  
as described in CarbonEvents.h's entry on kEventClassAppleEvent /  
kEventAppleEvent:


//  If you need to handle this Carbon event yourself, the necessary
//  steps are: (1) remove the Carbon event from the queue. The
//  AppleEvent requires some special preparation before it can be
//  processed, and this preparation only occurs when the event is
//  dequeued. (2) Use ConvertEventRefToEventRecord to get an
//  EventRecord from the Carbon event. (3) Call AEProcessAppleEvent
//  on the EventRecord.

 It appears that RunApplicationEventLoop() installs a handler for  
this event, but in mixed Carbon/Cocoa applications, nobody installs  
this on the Cocoa event loop (just like in WNE-based Applications that  
call RunAppModalLoop()).


 I don't remember all the details, but you may have to wait until  
there actually *is* an event loop to install it on, i.e. do this in - 
applicationDidFinishLaunching:, or even after each invocation to  
runAppModalLoopForWindow (but before it returns).


Cheers,
-- Uli Kusterer
The Witnesses of TeachText are everywhere...
http://www.zathras.de





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Re: HFS Format API?


On 08 May 09, at 07:01, iseecolors wrote:

Is there a Cocoa/Core Foundation (or ___) API for formatting a Volume?


No, largely because formatting a volume is a privileged operation  
which can't be performed by a userspace application anyway. However,  
you may want to look into the newfs_hfs and diskutil command-line  
utilities. And be careful.

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Re: Converting NSString to C++ std::string

2009-05-08 Thread Clark Cox

On Fri, May 8, 2009 at 9:56 AM, Drew Lawson d...@furrfu.com wrote:
 According to Alex Curylo:


 On 8-May-09, at 8:55 AM, cocoa-dev-requ...@lists.apple.com wrote:

  mycppstring = std::string([[myNSTextField stringValue] UTF8String]);
 
 
  But it keeps crashing. What's the recommended way?

 I have no idea, but it works for me to simply assign it without the
 constructor. Why, here's an example in the file I'm working on right
 now, fancy that:

 The only other gotcha I can think of (because it annoys me) is that
 std::string does not play nice with null pointers.  Is it possible
 that stringValue returns nil?

 Hmm, I had one other thought.  There are several std::string
 constructors, depending on the parameter type.  In ObjC++, is it
 unambiguous at compile time that the expression is const char*?

Yes. Otherwise, it would be a compile-time error. std::string only has
two single-parameter constructors, one takes a (const char*) and one
takes a (const std::string), so unless you've defined your own
UTF8String method that returns a std::string, none of the other
constructors will match.

-- 
Clark S. Cox III
clarkc...@gmail.com
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Re: NSString to bit pattern

2009-05-08 Thread Robert Claeson



On 8 May 2009, at 23:00, Andrew Farmer wrote:


On 08 May 09, at 08:47, Greg Guerin wrote:
A string is a sequence of characters.  Retrieve each character,  
determine its bit-pattern, then append that pattern to an  
NSMutableString.  Now you have to figure out how to turn a  
character into its bit-pattern.  So break that down.


One extra complication: By Cocoa's standards, a string is not a  
sequence of bytes: it's a sequence of Unicode codepoints.* To treat  
a string as a bag of bytes, you will first need to choose a text  
encoding to treat the text as, then convert it using the NSString  
dataUsingEncoding: method.


The UTF encoding that will allow you to treat a string as bag of words  
(not bytes), where each Unicode codepoint takes exactly the same  
space, is UTF32.


UTF32 is also what C++ expects for its std::wstring type under Unix.

I have a framework for Unicode conversion and transformation that  
internally uses all UTF32 for ease of processing. It is unfortunately  
not open source at the present time.


Robert

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Re: [Q] Correct way to identify an application, Launch Services, Spaces

2009-05-08 Thread Sean McBride

On 5/8/09 10:40 AM, Quincey Morris said:

OTOH, if your two versions really have a good reason for existing
independently (beyond testing and an interim changeover period), then
what you probably have is two different apps, and different bundle
identifiers would make sense.

I've just run into this situation.  In my case v2 can open v1 docs, but
cannot save that format.  Because of this, I think it makes more sense
that dbl-clicking a v1 document should open the v1 app, but LS always
prefers the newest version of any apps with the same identifier
(regardless of LSHandlerRank setting).

So if your app changes a lot it makes sense to change identifiers.
What a lot is depends.

--

Sean McBride, B. Eng s...@rogue-research.com
Rogue Researchwww.rogue-research.com
Mac Software Developer  Montréal, Québec, Canada


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Re: Renaming a file repositions icon in Finder

2009-05-08 Thread Sean McBride

On 5/8/09 2:52 PM, Jim Turner said:

It appears that renaming a file will cause the Finder to reposition
the icon for the file if it's currently displayed in a icon view
somewhere.  Is there any way to prevent that from happening?  It looks
very strange to have icons jump all over the place just because of a
rename.

Thinking that it might have been the method with which I was renaming
the file, I tried NSFileManager's moveItemAtPath:toPath:error:,
rename(), and FSRenameUnicode() and all three exhibit the same
problem.

Many apps exibit this problem and it has driven me and others nuts for
years.  Do file a(nother) bug.

--

Sean McBride, B. Eng s...@rogue-research.com
Rogue Researchwww.rogue-research.com
Mac Software Developer  Montréal, Québec, Canada


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Re: NSApplication and command line args

On Fri, May 8, 2009 at 6:03 PM, Andrew Farmer andf...@gmail.com wrote:
 A much simpler solution would be to preprocess the arguments which you pass
 to NSApplicationMain. Run through everything in argv, then create a new
 array of arguments from that with all arguments your application wants to
 handle removed and pass that to AppKit.

Why bother?  NSProcessInfo already does this for you.

--Kyle Sluder
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Re: AppleEvents and modal dialogs

2009-05-08 Thread Sean McBride

On 5/8/09 12:16 PM, James Walker said:

I have a mostly-Carbon app that runs some Cocoa modal dialogs using
-[NSApplication runModalForWindow:].  If an Apple Event (such as 'odoc')
arrives while such a dialog is showing, it just gets eaten.  I'd like to
have it either handled or deferred.  I tried creating an NSApplication
delegate object, but its application:openFile: method doesn't get called.

James,

I had a similar (but different to be sure) situation.  You _might_ find
this helpful:
http://www.cocoabuilder.com/archive/message/cocoa/2009/3/6/231736

--

Sean McBride, B. Eng s...@rogue-research.com
Rogue Researchwww.rogue-research.com
Mac Software Developer  Montréal, Québec, Canada


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Re: NSString to bit pattern

2009-05-08 Thread Greg Guerin


Andrew Farmer wrote:

One extra complication: By Cocoa's standards, a string is not a  
sequence of bytes: it's a sequence of Unicode codepoints.* To treat  
a string as a bag of bytes, you will first need to choose a text  
encoding to treat the text as, then convert it using the NSString  
dataUsingEncoding: method.



I didn't say a string was a sequence of bytes.  I didn't even use the  
word byte in my reply. This was subtle, but intentional.


The interpretation of character was intentionally left as an  
exercise for the reader to decide.  It could mean ASCII character.   
It could mean UTF8 byte.  It could mean Unicode code-point.  It  
depends on what bit-pattern the reader is interested in.


However, the interpretation of a character doesn't change the  
sequence of the elements in the string.  They are still arranged in a  
sequential order, and the process of breaking it down is the same  
regardless of the coding.


  -- GG

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Re: NSString to bit pattern

2009-05-08 Thread Alastair Houghton


On 8 May 2009, at 23:13, Robert Claeson wrote:


On 8 May 2009, at 23:00, Andrew Farmer wrote:


On 08 May 09, at 08:47, Greg Guerin wrote:
A string is a sequence of characters.  Retrieve each character,  
determine its bit-pattern, then append that pattern to an  
NSMutableString.  Now you have to figure out how to turn a  
character into its bit-pattern.  So break that down.


One extra complication: By Cocoa's standards, a string is not a  
sequence of bytes: it's a sequence of Unicode codepoints.* To treat  
a string as a bag of bytes, you will first need to choose a text  
encoding to treat the text as, then convert it using the NSString  
dataUsingEncoding: method.


The UTF encoding that will allow you to treat a string as bag of  
words (not bytes), where each Unicode codepoint takes exactly the  
same space, is UTF32.


It's a mistake to think that way.  Even with UTF-32, there is not a  
one to one correspondence between what the user will think of as a  
single character (which IIRC in Unicode speak is now referred to  
as a grapheme cluster) and a Unicode code point.  There are plenty of  
obvious examples, like combining accents, but there are much more  
complicated examples, for instance in some of the Indic scripts.


UTF-32 is largely pointless, actually.  UTF-16 (which is what Cocoa  
uses, and it's also what is used by ICU, the Unicode reference  
implementation) is never any larger, and is usually only half the  
size.  Moreover, UTF-16 is only twice as large as necessary for U.S.  
ASCII (not four times like UTF-32), and for non-Latin languages in  
particular, UTF-16 is often smaller than UTF-8.



UTF32 is also what C++ expects for its std::wstring type under Unix.


No.  C++ doesn't expect any particular encoding for std::wstring, in  
the same way that C doesn't expect any particular encoding for a  
wchar_t.


It is also worth pointing out that both the C wide character APIs and  
their C++ brethren are ill suited to Unicode.  They were designed  
under the assumption that one wide character really was one end-user  
character, and that each unit can be treated separately with no  
consideration of context.  This is true for some of the older wide  
string encodings that were used historically in Asia, which is what  
wchar_t et al. were actually designed for.  It is *not* the case for  
any encoding of Unicode.


Now it is true that on OS X and Linux, wchar_t is usually used to hold  
UTF-32, and that is often the case on other platforms also.  It is  
also true that on Windows it normally holds UCS-2 or UTF-16, depending  
on the APIs you're calling.  People would of course immediately say  
but UTF-16 breaks the spec, so Windows is wrong, and that's true,  
but so does UTF-32 because of combining characters and the like.


Anyway, unless you have special knowledge on a particular platform,  
the *only* things you can do with the C or C++ wide strings and  
characters are:


-  You can use them with the wide string/character APIs.

-  You can convert them to or from the system's multibyte string  
format using e.g. wcstombs() or mbstowcs().  Incidentally, you can't  
portably make assumptions about that format either.


-  You can pass them to other functions that accept C/C++ wide strings  
or wide characters.


You cannot portably make *any* assumption about the meaning of a wide  
character in C or C++.  For all you know, your code could be running  
on a Japanese system using some kind of JIS encoding rather than  
Unicode.


I have a framework for Unicode conversion and transformation that  
internally uses all UTF32 for ease of processing. It is  
unfortunately not open source at the present time.


There is a very comprehensive Open Source Unicode library called ICU.   
It actually ships as part of Mac OS X, though the headers aren't  
installed by default.  If you can't do what you need with Cocoa or  
Core Foundation, or you need portability, I strongly recommend that  
you use ICU.


However, before jumping straight for ICU, check out both Cocoa *and*  
Core Foundation.  Chances are that what you need is already in there.


Kind regards,

Alastair.

--
http://alastairs-place.net



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Re: NSString to bit pattern

2009-05-08 Thread Alastair Houghton


On 8 May 2009, at 10:00, erappy wrote:

Hi, I am trying to find  way to convert the NSString object into its  
bit

pattern and convert that bit pattern into another NSString object,
For Example if I have
NSString *origStr = @Hello:
NSString * bitPatternoforigStr ;
no I want to convert it to the bit pattern if Hello and return an  
object of

type NSString with bit pattern.
it should be something like;
bitPatternoforigStr = @01011010011000100100110101100101 ;
Can someone help me in this.


You need to start by deciding what encoding you wish to use for your  
string.  NSString, broadly speaking, works as if it is a container for  
UTF-16 code units.  It isn't always implemented that way under the  
covers, but you can assume that it behaves that way.  If UTF-16 is  
what you need, you could simply iterate over the string in a loop  
doing something like this:


  NSUInteger len = [myString length];
  for (NSUInteger n = 0; n  len; ++n) {
unichar ch = [myString characterAtIndex:n];

// Turn ch (which is 16 bits in length) into binary and append it  
to your result string

  }

Often you might not want UTF-16 though, and in that case you can use  
NSString's -dataUsingEncoding: method to convert the string to an  
NSData containing data in the desired encoding.  Then you might loop  
over it differently, e.g.


  #include inttypes.h

  ...

  NSData *stringData = [myString  
dataUsingEncoding:NSUTF8StringEncoding];

  NSUInteger dataLen = [stringData length];
  const uint8_t *bytes = (const uint8_t *)[stringData bytes];

  for (NSUInteger n = 0; n  dataLen; ++n) {
// Turn bytes[n] into binary and append it to your result string
  }

Converting an integer into a binary string is a trivial programming  
exercise, so you should be able to do that part on your own.


Kind regards,

Alastair.

--
http://alastairs-place.net



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Re: Getting the private IP

2009-05-08 Thread Alastair Houghton


On 8 May 2009, at 15:46, Mr. Gecko wrote:


Hello, I'm trying to find out how to get the private IP address.
This is my quick way of finding out.
- (NSString *)localIP {
NSString *IPAddress = @;
struct ifaddrs *myaddrs, *ifa;
struct sockaddr_in *s4;
int status;
char buf[64];

status = getifaddrs(myaddrs);


[snip]


is there a better way?


Depends what you are trying to achieve.  It might be better if you  
could explain what you are doing that needs this information, since  
there are some alternatives that might be better in some cases.


Additionally, you need to be careful because:

-  There may be more than one active interface with an IP address
-  There may be more than one IP address for each active interface
-  Your idea of the right interface to use might not match the user's  
idea (or the system's idea)


Unless you're doing some very low-level networking code, you can  
usually live without knowing the IP address of the system (to the  
extent that such a thing actually exists).


Kind regards,

Alastair.

--
http://alastairs-place.net



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Re: Getting the private IP

2009-05-08 Thread Mr. Gecko

I'm writing a personal application for managing my domains, and I  
think what I wrote will work well enough for me. But the problem where  
if it's a self-assigned address does miss with my setup. Because  
sometimes I'll hock it up via firewire to my server for fast backup.


On May 8, 2009, at 6:32 PM, Alastair Houghton wrote:


On 8 May 2009, at 15:46, Mr. Gecko wrote:


Hello, I'm trying to find out how to get the private IP address.
This is my quick way of finding out.
- (NSString *)localIP {
NSString *IPAddress = @;
struct ifaddrs *myaddrs, *ifa;
struct sockaddr_in *s4;
int status;
char buf[64];

status = getifaddrs(myaddrs);


[snip]


is there a better way?


Depends what you are trying to achieve.  It might be better if you  
could explain what you are doing that needs this information, since  
there are some alternatives that might be better in some cases.


Additionally, you need to be careful because:

-  There may be more than one active interface with an IP address
-  There may be more than one IP address for each active interface
-  Your idea of the right interface to use might not match the  
user's idea (or the system's idea)


Unless you're doing some very low-level networking code, you can  
usually live without knowing the IP address of the system (to the  
extent that such a thing actually exists).


Kind regards,

Alastair.

--
http://alastairs-place.net





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converting a characer to a keycode

2009-05-08 Thread kvic...@pobox.com


i would like to convert a character to its corresponding virtual keycode.

the why: i allow users to specify keyboard equivalents for menu items 
(in a manner similar to xcode key binding preferences). for reasons i 
don't understand it works better use unshifted characters for the 
shifted numeric keys. ie, command-shift-1 works for me, whereas 
command-! (command-exclamation mark) does not.


additonally, my app is fully scriptable and i allow the user to 
specify the keyboard shortcut via an applescript. thus, i would like 
to convert a script specification of command-exclamation mark to 
command-shift-1 (command-shift-one).


the only way i can think to perform this conversion is to itereate 
over the virtual key codes 0-127 (with various combinations of shift 
and option keys) until i find the one that matches the user input 
character.


and while this is certainly doable, it feels awfully clumsy (and 
potentially slow).


is there a better way?

thanx,
ken
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Re: converting a characer to a keycode

2009-05-08 Thread Greg Guerin


ken wrote:

the only way i can think to perform this conversion is to itereate  
over the virtual key codes 0-127 (with various combinations of  
shift and option keys) until i find the one that matches the user  
input character.


and while this is certainly doable, it feels awfully clumsy (and  
potentially slow).


is there a better way?



Create the inverse mapping once, e.g. in an NSDictionary, then use  
that mapping thereafter, instead of searching repeatedly.


This assumes there is an unambiguous inverse mapping, which ain't  
necessarily so.  For example, a keyboard with a numpad has duplicate  
key legends for all numpad keys.  I think these numpad keys have  
different keycodes than the keys in the main alphanum layout.  So  
given a character like 1 (or *, =, etc.) it's not possible to  
reverse it to a single unique keycode.


  -- GG

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Re: NSApplication and command line args