Using table view cells from nibs

[Tino Rachui]

I've created a table view cell in interface builder with a custom height. 
However when I load and use that kind of cell at runtime it disregards my 
custom height. I have to use 'heightForRowAtIndexPath' to set the desired cell 
height. Is there anything I'm missing?

Thanks in advance,
Tino___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Help w/ first step of creating Help Book for app

[Ron Fleckner]

On 29/05/2010, at 2:29 PM, Shane wrote:


I'm trying to create a help book for my app using the "Apple Help
Programming Guide", which is not easy for me to follow...


Stop right there!

Fortunately, Matt Neuburg has created a very helpful short movie  
showing exactly how to do this.  As Matt says at the bottom of this  
page:,


"This problem is nearly always caused by DNFD (Did Not Follow  
Directions). Apple has provided the directions. Follow them! Follow  
them very, very exactly.

I’ve made a tutorial movie laying stress on the key points:

http://www.apeth.com/writersua/implementAppleHelp.mov";



I strongly urge you to have a look.

Ron


___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: drawing border of NSPopUpButtonCell drawInteriorWithFrame:inView:

[Shane]

>> [path moveToPoint:NSMakePoint(cellFrame.origin.x, cellFrame.size.height)];
>> [path lineToPoint:NSMakePoint(cellFrame.size.width, cellFrame.size.height)];
>
>
> If cellFrame = {500, 300, 120, 20}
>
> You're drawing from {500, 20} to {120, 20}
>

I have four NSView cell's (so I have four data table header cells,
i.e. 4 columns), and here's the cellFrame values as output by the
NSLog statement above.

x:249 y:0 width:367 height:17
x:146 y:0 width:103 height:17
x:43 y:0 width:103 height:17
x:0 y:0 width:43 height:17

This seems correct. My first cell is trying to draw from x=0 with a width of 43.
My second cell is trying to draw from x=43 with a width of 103.
Third cell is drawing from x=146 with width of 103.
And fourth cell is drawing from x=249 with width of 367.

Yet, it's like each border is overwriting itself starting from 0 (the
leftmost cell).

- (void) drawInteriorWithFrame:(NSRect) cellFrame inView:(NSView *) controlView
{
 NSLog(@"x:%g y:%g width:%g height:%g", cellFrame.origin.x,
   cellFrame.origin.y, cellFrame.size.width, 
cellFrame.size.height);

[[NSColor whiteColor] set];
[[NSBezierPath bezierPathWithRect:cellFrame] fill]; 

NSBezierPath *path = [NSBezierPath bezierPath];

[path moveToPoint:NSMakePoint(cellFrame.origin.x, 
cellFrame.size.height)];
[path lineToPoint:NSMakePoint(cellFrame.size.width, 
cellFrame.size.height)];

[[NSColor darkGrayColor] setStroke];

[path stroke];

[super drawInteriorWithFrame:cellFrame inView:controlView];

return;
}

The image attachment on the previous email shows that the line from
the first cell is actually length 103 and it should only be length 43
to cover just that first cell, so I believe somehow it is overwriting
and starting from 0, though the x origin shows otherwise.
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Help w/ first step of creating Help Book for app

[Shane]

I'm trying to create a help book for my app using the "Apple Help
Programming Guide", which is not easy for me to follow. I'm at the
section "Creating a Basic Help Book", trying to get the structure
right where the HTML files are to go. It says I should have a dir
structure like:

SurfWriter.app/ (I'm guessing this is the top level folder under
"Groups & Files" of my XCode view).
Contents/
Resources/
SurfWriter.help/
Contents/
  Info.plist
  Resources/
  shrd/
  English.lproj/
  pgs/
  gfx/
  sty/
  scrpt/

Should I just add in the "Groups & Files" view of XCode a group, or do
I actually create directories with these names? I don't even have a
'Contents' directory in the top level of my XCode project so I'm
guessing I have to create every one of these which I don't have in my
current project.

Under "Groups & Files" of my XCode project, I have for the most part,
the following:

MyApp
Source
Controllers
Delegates
Models
Servers
Views
Includes
Resources
Frameworks
Products
Targets
Executables
Find Results
Bookmarks
SCM
Project Symbols
Implementation Files
Interface Builder Files
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: authenticating peers

[Jens Alfke]

On May 28, 2010, at 6:59 PM, Michael Ash wrote:

> An attacker can execute a man-in-the-middle attack...
> An attacker can simply impersonate your app...
> Neither of these can be defended against, even theoretically, when 
> communicating peer-to-peer.

Not true; if you use SSL or some equivalent, both peers can use certificates to 
identify themselves. This works if either (a) the certs are signed by a 
reputable authority (as in the traditional use of SSL by web servers), or if 
(b) each peer has previously verified the other’s identity and remembered the 
cert (as is done by SSH.)

GameKit doesn’t do anything like this, though, although I can’t say for sure 
because Apple’s never published any information about the protocol used (to my 
knowledge).

—Jens___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: NSURLConnection weirdiness

[Jerry Krinock]

On 2010 May 28, at 02:58, Nava Carmon wrote:

> When I enter same link in Safari it takes a second to bring data.

I understand that you're saying it "works OK at the same time from the same IP 
address from Safari", meaning that you have ruled out being throttled by this 
"certain server", or your ISP.  OK, because these would be the first two 
suspects on my list.

> And after another trial I can access the link.

I'm assuming you mean exactly the same URL.  Some servers give better service 
to web browsers than to apps requesting via their API.

> What might be the reason for such a weird behavior?  How can I improve it?

You're going to have to discover a pattern.  For another data point with these 
types of problems, you'll usually want to open a Terminal window and send your 
request using the unix command curl(1).

> What is the role of cache policy with NSURLConnection?

Long answer:

http://developer.apple.com/mac/library/documentation/cocoa/conceptual/URLLoadingSystem/Concepts/CachePolicies.html

For consistency in testing, you'll probably want to use 
NSURLRequestReloadIgnoringCacheData.

Let us know if you find anything interesting.  Actually, a better list for this 
question would be macnetworkp...@lists.apple.com.

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Michael Ash]

On Fri, May 28, 2010 at 7:40 PM, Philip Vallone
 wrote:
> Hi,
>
>> Wait, are you archiving and unarchiving data over a network? That’s a bad 
>> idea unless you’re extremely careful. The problem is that a malicious peer 
>> can send you an archive that expands into any codable object, not just the 
>> types you were expecting; this can be exploited to do Bad Things in your 
>> process, like crashing and possibly worse.
>
> How is it possible using GKSession to be introduced to a malicious peer.? I 
> am creating a GKSession object and connecting via GKPeerPickerController. A 
> hand shack is made between the the two peers. Once both peers accept the 
> connection, the session is stored along with the peer id. This information 
> can be checked before any information is received. Isn't this secure enough?

An attacker can execute a man-in-the-middle attack, wherein he talks
to two copies of your app and passes data between them, such that they
think they're talking directly to each other, but then modifies data
maliciously.

An attacker can simply impersonate your app, responding like a real
client, but sending malicious data when desired.

Neither of these can be defended against, even theoretically, when
communicating peer-to-peer. (It is possible to defend against them
when communicating with a server by using digital signature
technology, but this doesn't work when the attacker has direct access
to the program he wants to impersonate.)

In short, you should treat any data coming from the network as
potentially evil, always.

Mike
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Kyle Sluder]

On May 28, 2010, at 4:40 PM, Philip Vallone  
 wrote:


How is it possible using GKSession to be introduced to a malicious  
peer.? I am creating a GKSession object and connecting via  
GKPeerPickerController. A hand shack is made between the the two  
peers. Once both peers accept the connection, the session is stored  
along with the peer id. This information can be checked before any  
information is received. Isn't this secure enough?


Always assume your peer is malicious. Malicious behavior is a subset  
of possible errant behaviors.


--Kyle Sluder
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Philip Vallone]

Hi,

> Wait, are you archiving and unarchiving data over a network? That’s a bad 
> idea unless you’re extremely careful. The problem is that a malicious peer 
> can send you an archive that expands into any codable object, not just the 
> types you were expecting; this can be exploited to do Bad Things in your 
> process, like crashing and possibly worse.

How is it possible using GKSession to be introduced to a malicious peer.? I am 
creating a GKSession object and connecting via GKPeerPickerController. A hand 
shack is made between the the two peers. Once both peers accept the connection, 
the session is stored along with the peer id. This information can be checked 
before any information is received. Isn't this secure enough?  

Thanks,

Phil


On May 28, 2010, at 4:40 PM, Jens Alfke wrote:

> 
>> On May 28, 2010, at 2:25 AM, Philip Vallone wrote:
>>> This is a relative question, which depends on how the data is coming and 
>>> going. My question comes from the following situation. Suppose I have a 
>>> GKSession that is passing information via Bluetooth. The sender can send 
>>> any type of information (NSString, UIImage etc...). The receiver needs to 
>>> know how to handle this data. If there is a better way... Then how?
> 
> Wait, are you archiving and unarchiving data over a network? That’s a bad 
> idea unless you’re extremely careful. The problem is that a malicious peer 
> can send you an archive that expands into any codable object, not just the 
> types you were expecting; this can be exploited to do Bad Things in your 
> process, like crashing and possibly worse.
> 
> It would be safer and easier to send property lists instead. The property 
> list decoder is safe in that it will only ever output a known set of classes. 
> You just have to watch out that your code never takes type types of incoming 
> data for granted, otherwise it can throw assertion failures if it gets the 
> wrong data. So instead of
>   NSString *cmd = [message objectForKey: @“command”];
> you have to do something like
>   id cmd = [message objectForKey: @“command”];
>   if (![cmd isKindOfClass: [NSString class]])
>   return NO; // reject the message as invalid
> My MYUtilities library has a macro called $castIf that makes this really easy:
>   NSString *cmd = $castIf(NSString, [message objectForKey: @“command”]);
> It returns nil if the object isn’t of the required class.
> 
> Yes, checking classes at runtime is often a bad-code smell. But it’s not 
> avoidable when working with untrusted data and untyped data structures like 
> plists. You have to code defensively on the assumption that any message you 
> receive might be corrupt or malicious.
> 
> —Jens

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Bill Appleton]

hi all,

i fixed the movie poster problem as well

thanks for all the help, this is a great forum

have a nice weekend!


best,

bill






On Fri, May 28, 2010 at 1:28 PM, Robert Martin wrote:

> Try using the QTMovie method frameImageAtTime: withAttributes: error:
>
> You can specify the image size you want returned in the attributes
> dictionary (along with the image format).
>
>
>
> On May 28, 2010, at 2:55 PM, Bill Appleton wrote:
>
> > the remaining problem is that the movie posetr returns a size of 100 x
> 100
> >
> > so when i capture the poster it is really pixelated
> >
> > i've tried everything -- how do other people get movie posters and/or
> grab
> > movie frames?
> >
>
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Jens Alfke]

On May 27, 2010, at 12:43 PM, Bill Appleton wrote:

> there were some things i
> noticed that i couldn't do easily in Cocoa or any other 64 bit OSX API.

Cocoa doesn’t claim to do everything. There are a lot of tasks that should be 
done using lower level APIs.

> *1) I can't hide a file, or test if a file is hidden*
> I had to resort to FSGetCatalogInfo

I’m pretty sure FSGetCatalogInfo is available in 64-bit. It’s not deprecated 
and it’s not part of the High-Level Toolbox.

> *2)** **I **can't **get the current caret blink rate in milliseconds*
> I used to call GetCaretTime, but now I just use 500 milliseconds. Eeek!

OS X hasn’t ever had a UI to change the caret blink time, so I think you can 
safely hardcode it.

(Although I can’t think of why you’d need this unless you’re implementing your 
own text editing system from scratch, which is a pretty scary thought. If 
you’re doing that, there are a zillion other expected text behaviors you’ll 
need to get right, that are a lot more important than the blink rate.)

—Jens___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Jens Alfke]

> On May 28, 2010, at 2:25 AM, Philip Vallone wrote:
>> This is a relative question, which depends on how the data is coming and 
>> going. My question comes from the following situation. Suppose I have a 
>> GKSession that is passing information via Bluetooth. The sender can send any 
>> type of information (NSString, UIImage etc...). The receiver needs to know 
>> how to handle this data. If there is a better way... Then how?

Wait, are you archiving and unarchiving data over a network? That’s a bad idea 
unless you’re extremely careful. The problem is that a malicious peer can send 
you an archive that expands into any codable object, not just the types you 
were expecting; this can be exploited to do Bad Things in your process, like 
crashing and possibly worse.

It would be safer and easier to send property lists instead. The property list 
decoder is safe in that it will only ever output a known set of classes. You 
just have to watch out that your code never takes type types of incoming data 
for granted, otherwise it can throw assertion failures if it gets the wrong 
data. So instead of
NSString *cmd = [message objectForKey: @“command”];
you have to do something like
id cmd = [message objectForKey: @“command”];
if (![cmd isKindOfClass: [NSString class]])
return NO; // reject the message as invalid
My MYUtilities library has a macro called $castIf that makes this really easy:
NSString *cmd = $castIf(NSString, [message objectForKey: @“command”]);
It returns nil if the object isn’t of the required class.

Yes, checking classes at runtime is often a bad-code smell. But it’s not 
avoidable when working with untrusted data and untyped data structures like 
plists. You have to code defensively on the assumption that any message you 
receive might be corrupt or malicious.

—Jens___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Robert Martin]

Try using the QTMovie method frameImageAtTime: withAttributes: error:

You can specify the image size you want returned in the attributes dictionary 
(along with the image format).



On May 28, 2010, at 2:55 PM, Bill Appleton wrote:

> the remaining problem is that the movie posetr returns a size of 100 x 100
> 
> so when i capture the poster it is really pixelated
> 
> i've tried everything -- how do other people get movie posters and/or grab
> movie frames?
> 

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: NSURLConnection weirdiness

[Jens Alfke]

On May 28, 2010, at 2:58 AM, Nava Carmon wrote:

> sometimes it's just stuck after initialing and don't get into connection's 
> delegate methods. I'm working with WiFi & 3G and the same server all the 
> time. When it comes to didFailWithError i see that mostly it was a timeout 
> error.

Do you mean that it does eventually fail with a timeout error, or that it never 
calls the delegate at all?

If you’re connecting over 3G, I would expect random failures once in a while, 
as it’s a less reliable network. 

—Jens___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Spotlight SDK replacement on iPad/iPhone

[Laurent Cerveau]

You can try swish-e. Pretty good stuff. I still wish SearchKit would  
be public on the iPhoneOS


Laurent

Sent from my road phone


On May 28, 2010, at 7:58 PM, sebi  wrote:


Hello,

I'd like to have a quick full text search on a pdf in my app.  
Unfortunately the NSMetadata* classes are not available in the  
iPhone SDK. Does someone know of a 3rd party solution or so?


Thanks and regards,
sebastian mecklenburg___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/lcerveau%40me.com

This email sent to lcerv...@me.com

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Jean-Daniel Dupas]

Le 28 mai 2010 à 20:55, Bill Appleton a écrit :

> hi Kevin,
> 
> sorry if this is a repost, my last one was rejected for being too big
> 
> YES, the QTMovieNaturalSizeAttribute definitely returns the size i am
> looking for
> 
> the remaining problem is that the movie posetr returns a size of 100 x 100
> 
> so when i capture the poster it is really pixelated
> 
> i've tried everything -- how do other people get movie posters and/or grab
> movie frames?
> 


Either set the current movie size before requesting the poster frame (using 
QTMovieCurrentSizeAttribute) or use -frameImageAtTime:withAttributes:error 
method to specify the expected size.



-- Jean-Daniel




___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Alex Curylo]

On 2010-05-28, at 12:02 PM, cocoa-dev-requ...@lists.apple.com wrote:

> i've tried everything -- how do other people get movie posters and/or grab
> movie frames?

With classic QuickTime if there was no poster frame specifically set in the 
movie QuickTime would reliably return the first frame. With QuickTimeKit that 
is ... inconsistent. Safest to just grab the first frame yourself.

As for capturing frames, here's the I believe currently recommended way to do 
it:

   NSDictionary *imageAttrs = [NSDictionary dictionaryWithObjectsAndKeys:
  QTMovieFrameImageTypeNSImage, QTMovieFrameImageType,
  [NSArray arrayWithObject:@"NSBitmapImageRep"], 
QTMovieFrameImageRepresentationsType,
  [NSNumber numberWithBool:YES], QTMovieFrameImageDeinterlaceFields,
  [NSNumber numberWithBool:YES], QTMovieFrameImageHighQuality,
  [NSNumber numberWithBool:YES], QTMovieFrameImageSingleField,
  nil
   ];

   QTTime captureTime = [0 .. self.movie.duration];

   NSError *captureError = nil;
   NSImage *captureFullFrame = [self.movie frameImageAtTime:captureTime
  withAttributes:imageAttrs
  error:&captureError
   ];

That allows for a variety of other image types besides 
QTMovieFrameImageTypeNSImage, but is QuickTime 7.2 dependent. If you need older 
version compatibility, use

- (NSImage *)frameImageAtTime:(QTTime)time;

Either way, these should only be called on the main thread. Theoretically you 
can detach movies and move them around between threads, but you have a good 
chance of running into issues doing so, particularly if you're working with 
QTKit captured movies; something about the rendering context I think, although 
the details are old enough to be kinda fuzzy now. Safer to just call 
performSelectorOnMainThread: to get each grabbed frame if you've got a 
background renderer or suchlike, I'd say.

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

"...the variable PI can be given that value [3.141592653589793] with
 a DATA statement. This simplifies the modifying of the program,
 should the value of PI ever change." -- SDS Sigma series Fortran manual 



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Changing cursors in window's bounds

[Quincey Morris]

On May 28, 2010, at 11:55, John Love wrote:

> My challenge centers on trying to make this magic happen just in the window's 
> canned contentView without creating a custom NSView within Interface Builder. 
>  My sub-classed NSDocument knows about the window via my overridden 
> -windowControllerDidLoadNib:(NSWindowController *)aController because its 
> window = [aController window].  Also,  I have one Controller (sub to 
> NSObject) which has knowledge of the NSDocument's NSWindow because I pass 
> this window to it.
> 
> So, how do I effect cursor tracking just in this window without creating a 
> custom NSView in IB?

A NSTrackingArea has an owner, which doesn't have to be a view, and which 
receives the tracking area's messages. So just make your window controller or 
your document the owner.

The only problem is that I have a *vague* recollection that there's something 
special about the cursorUpdate: message. It might be that this is the only one 
of NSTrackingArea's generated messages that's sent to the view under the cursor 
instead of the owner. But I'm likely misremembering, so you should give it a 
try.


___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Bill Appleton]

hi Kevin,

sorry if this is a repost, my last one was rejected for being too big

YES, the QTMovieNaturalSizeAttribute definitely returns the size i am
looking for

the remaining problem is that the movie posetr returns a size of 100 x 100

so when i capture the poster it is really pixelated

i've tried everything -- how do other people get movie posters and/or grab
movie frames?


best,

bill






On Fri, May 28, 2010 at 9:52 AM, Kevin Wojniak  wrote:

> Did you try QTMovieNaturalSizeAttribute?
>
> http://developer.apple.com/mac/library/technotes/tn2005/tn2138.html#TNTAG11
>
>
> On May 28, 2010, at 9:43 AM, Bill Appleton wrote:
>
> > Hi Chaitanya,
> >
> > that code always returns a size of 100, 100 for every movie I try.
> really.
> >
> > and then the poster or frame is really pixelated because it is coming
> from
> > such a small source.
> >
> > i am surely missing something here!
> >
> >
> > thanks,
> >
> > bill
> >
> >
> >
> >
> >
> > On Fri, May 28, 2010 at 1:17 AM, Chaitanya Pandit <
> chaita...@expersis.com>wrote:
> >
> >>
> >> *3)** **I **can't get t**he right dimensions for a QuickTime movie or
> >> poster
> >> *
> >>
> >>
> >> NSSize movieSize =  [[movieObject currentFrameImage] size];
> >>
> >> I used to call GetMovieBox, so I tried using [QTMovie posterImage] but
> the
> >> NSImage reported a width and height of 100, and then my movie poster was
> >> really pixelated. How do I get a decent looking movie poster? How do I
> get
> >> the original dimensions for movie playback?
> >>
> >>
> >> *4)** **I **can't call the printing code*
> >>
> >> I know, the printing code calls me. But other platforms don't work like
> >> this. I eventually used Core Printing and the Cocoa dialogs by
> sub-classing
> >> and faking out NSPrintPanel. Is there a better way?
> >>
> >>
> >> *5)** **I **can't create a simple list*
> >>
> >> I did it the only way I could -- with a table that has one column, etc.
> Man
> >> that was painful for a simple list. Is there a better way?
> >>
> >>
> >> *6)** **I **can't get the height of some wrapped text*
> >>
> >> I had to use the layout manager and some major rocket science to get
> this
> >> to
> >> work right. I'm not saying Text Edit was great, but at least it knows
> how
> >> tall the text field is.
> >>
> >>
> >>
> >>
> >> Thanks!
> >>
> >>
> >> Bill Appleton
> >> ___
> >>
> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> >>
> >> Please do not post admin requests or moderator comments to the list.
> >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> >>
> >> Help/Unsubscribe/Update your Subscription:
> >>
> http://lists.apple.com/mailman/options/cocoa-dev/chaitanya%40expersis.com
> >>
> >> This email sent to chaita...@expersis.com
> >>
> >>
> >>
> > ___
> >
> > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> >
> > Please do not post admin requests or moderator comments to the list.
> > Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> >
> > Help/Unsubscribe/Update your Subscription:
> > http://lists.apple.com/mailman/options/cocoa-dev/kainjow%40kainjow.com
> >
> > This email sent to kain...@kainjow.com
>
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Changing cursors in window's bounds

[John Love]

I do not have a custom view, rather just the window's contentView with its 
various graphics, buttons, text etc.  I wish to simply change the cursor 
anytime the mouse is inside any part of this contentView.

If I did have a custom view, I understand all the machinations pertaining to 
changing cursors, e.g., NSView's initWithRect:, addTrackingArea:, and 
cursorUpdate:  Thanks to Apple's TrackIt Project, it all seems straightforward.

My challenge centers on trying to make this magic happen just in the window's 
canned contentView without creating a custom NSView within Interface Builder.  
My sub-classed NSDocument knows about the window via my overridden 
-windowControllerDidLoadNib:(NSWindowController *)aController because its 
window = [aController window].  Also,  I have one Controller (sub to NSObject) 
which has knowledge of the NSDocument's NSWindow because I pass this window to 
it.

So, how do I effect cursor tracking just in this window without creating a 
custom NSView in IB?

John Love
Touch the Future! Teach!



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[James Walker]

On 5/28/2010 11:18 AM, Alastair Houghton wrote:

On 28 May 2010, at 18:25, James Walker wrote:


On 5/27/2010 12:43 PM, Bill Appleton wrote:

*1) I can't hide a file, or test if a file is hidden*

I had to resort to FSGetCatalogInfo -- there is no way to do it through
NSFileManager, etc. Right?


Since there are several ways to hide a file, I don't think FSGetCatalogInfo 
will necessarily tell you if a file is invisible.  The right way (before 10.6, 
anyway) is to use LSCopyItemAttribute with the attribute 
kLSItemExtensionIsHidden.


I don't think that's the right thing at all.  kLSItemExtensionIsHidden would 
seem to be talking about the *extension*.


Oops, I was half right.  Right function, wrong attribute; 
kLSItemIsInvisible is what is needed.


--
  James W. Walker, Innoventive Software LLC
  
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Alastair Houghton]

On 28 May 2010, at 18:25, James Walker wrote:

> On 5/27/2010 12:43 PM, Bill Appleton wrote:
>> *1) I can't hide a file, or test if a file is hidden*
>> 
>> I had to resort to FSGetCatalogInfo -- there is no way to do it through
>> NSFileManager, etc. Right?
> 
> Since there are several ways to hide a file, I don't think FSGetCatalogInfo 
> will necessarily tell you if a file is invisible.  The right way (before 
> 10.6, anyway) is to use LSCopyItemAttribute with the attribute 
> kLSItemExtensionIsHidden.

I don't think that's the right thing at all.  kLSItemExtensionIsHidden would 
seem to be talking about the *extension*.

Kind regards,

Alastair.

--
http://alastairs-place.net



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Spotlight SDK replacement on iPad/iPhone

[sebi]

Hello,

I'd like to have a quick full text search on a pdf in my app. Unfortunately the 
NSMetadata* classes are not available in the iPhone SDK. Does someone know of a 
3rd party solution or so?

Thanks and regards,
sebastian mecklenburg___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[James Walker]

On 5/27/2010 12:43 PM, Bill Appleton wrote:

*1) I can't hide a file, or test if a file is hidden*

I had to resort to FSGetCatalogInfo -- there is no way to do it through
NSFileManager, etc. Right?


Since there are several ways to hide a file, I don't think 
FSGetCatalogInfo will necessarily tell you if a file is invisible.  The 
right way (before 10.6, anyway) is to use LSCopyItemAttribute with the 
attribute kLSItemExtensionIsHidden.

--
  James W. Walker, Innoventive Software LLC
  
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Sean McBride]

On Thu, 27 May 2010 12:43:42 -0700, Bill Appleton said:

>*2)** **I **can't **get the current caret blink rate in milliseconds*
>
>I used to call GetCaretTime, but now I just use 500 milliseconds. Eeek!
>Where is the current blink rate? Please don't tell me I don't need it, we
>implement our own scripting engine, etc.

Oddly, GetCaretTime is not deprecated but is removed in 64 bit.  So much
for advanced warning.  :)  I thought there might be a substitute in
event_status_driver.h, but didn't see anything.  You could always still
use GetCaretTime in a 32bit process and pass its result back to your
main process.

--

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


___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Wade Williams]

On May 28, 2010, at 11:04 AM, Kevin Wojniak wrote:

>> *4)** **I **can't call the printing code*
>> 
>> I know, the printing code calls me. But other platforms don't work like
>> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
>> and faking out NSPrintPanel. Is there a better way?
> 
> Can you be more specific? Have you looked at NSPrintOperation 
> setShowsPrintPanel: ?
> 
> 


I haven't read the entire thread so apologies if I'm missing something, but 
this snippet brings back a memory and I wonder if the same thing is happening 
to you.

I wanted to write a simple application that included printing.  All I wanted to 
do was print my NSView.  

I was coming from a C++ background, so I started looking around for a print 
manager object to give me a printer object to subclass.  I searched high and 
low.  I could find things that looked like they were close, but nothing really 
matched up.  How stupid could Cocoa be I thought?  All I want to do is get a 
reference to the default printer, and call some "printWithObject" method and 
pass it my view.  I spent hours looking and couldn't believe Cocoa could make 
something so simple so complex.

The problem of course was that I was coming at it from a C++ background and 
trying to shoehorn my C++ thinking onto Cocoa.

So, what did the solution end up being?

[myView print];

The lesson?  If it seems ridiculously hard, you're likely making it hard with 
incorrect assumptions.  Cocoa likely has an easier way.


___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Kevin Wojniak]

Did you try QTMovieNaturalSizeAttribute?

http://developer.apple.com/mac/library/technotes/tn2005/tn2138.html#TNTAG11


On May 28, 2010, at 9:43 AM, Bill Appleton wrote:

> Hi Chaitanya,
> 
> that code always returns a size of 100, 100 for every movie I try. really.
> 
> and then the poster or frame is really pixelated because it is coming from
> such a small source.
> 
> i am surely missing something here!
> 
> 
> thanks,
> 
> bill
> 
> 
> 
> 
> 
> On Fri, May 28, 2010 at 1:17 AM, Chaitanya Pandit 
> wrote:
> 
>> 
>> *3)** **I **can't get t**he right dimensions for a QuickTime movie or
>> poster
>> *
>> 
>> 
>> NSSize movieSize =  [[movieObject currentFrameImage] size];
>> 
>> I used to call GetMovieBox, so I tried using [QTMovie posterImage] but the
>> NSImage reported a width and height of 100, and then my movie poster was
>> really pixelated. How do I get a decent looking movie poster? How do I get
>> the original dimensions for movie playback?
>> 
>> 
>> *4)** **I **can't call the printing code*
>> 
>> I know, the printing code calls me. But other platforms don't work like
>> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
>> and faking out NSPrintPanel. Is there a better way?
>> 
>> 
>> *5)** **I **can't create a simple list*
>> 
>> I did it the only way I could -- with a table that has one column, etc. Man
>> that was painful for a simple list. Is there a better way?
>> 
>> 
>> *6)** **I **can't get the height of some wrapped text*
>> 
>> I had to use the layout manager and some major rocket science to get this
>> to
>> work right. I'm not saying Text Edit was great, but at least it knows how
>> tall the text field is.
>> 
>> 
>> 
>> 
>> Thanks!
>> 
>> 
>> Bill Appleton
>> ___
>> 
>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>> 
>> Please do not post admin requests or moderator comments to the list.
>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>> 
>> Help/Unsubscribe/Update your Subscription:
>> http://lists.apple.com/mailman/options/cocoa-dev/chaitanya%40expersis.com
>> 
>> This email sent to chaita...@expersis.com
>> 
>> 
>> 
> ___
> 
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> 
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> 
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/kainjow%40kainjow.com
> 
> This email sent to kain...@kainjow.com

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Scott Ribe]

On May 28, 2010, at 7:57 AM, Antonio Nunes wrote:

> I expect many of the files will arrive in the watched folder either through 
> user manipulation in the Finder or through scripts/automation. I don't think 
> I can assume only Finder-originated copying.

Then there's no way for the system to know when the operation is "done". The 
file being closed would be a very good candidate, but not necessarily... Even 
more so, the file being open doesn't necessarily mean it's still being copied 
(Spotlight, for instance).

Generally the most reliable way to deal with this is requirements on the 
process putting the file in the folder. In other words do not copy, and most 
certainly do not download, a file to the final name/location from where it will 
be picked up. Copy (or download) to a temporary file, distinguished by name or 
extension or type or visibility or location, then when the file is complete 
rename/update/move.

If you're only dealing with PDF files, you could check for the presence of the 
PDF footer at the end of the file. That would work unless some process creates 
a complete PDF file, then appends pages to it.

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




___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Bill Appleton]

Hi Chaitanya,

that code always returns a size of 100, 100 for every movie I try. really.

and then the poster or frame is really pixelated because it is coming from
such a small source.

i am surely missing something here!


thanks,

bill





On Fri, May 28, 2010 at 1:17 AM, Chaitanya Pandit wrote:

>
> *3)** **I **can't get t**he right dimensions for a QuickTime movie or
> poster
> *
>
>
> NSSize movieSize =  [[movieObject currentFrameImage] size];
>
> I used to call GetMovieBox, so I tried using [QTMovie posterImage] but the
> NSImage reported a width and height of 100, and then my movie poster was
> really pixelated. How do I get a decent looking movie poster? How do I get
> the original dimensions for movie playback?
>
>
> *4)** **I **can't call the printing code*
>
> I know, the printing code calls me. But other platforms don't work like
> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
> and faking out NSPrintPanel. Is there a better way?
>
>
> *5)** **I **can't create a simple list*
>
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?
>
>
> *6)** **I **can't get the height of some wrapped text*
>
> I had to use the layout manager and some major rocket science to get this
> to
> work right. I'm not saying Text Edit was great, but at least it knows how
> tall the text field is.
>
>
>
>
> Thanks!
>
>
> Bill Appleton
> ___
>
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/chaitanya%40expersis.com
>
> This email sent to chaita...@expersis.com
>
>
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Ricky Sharp]

On May 28, 2010, at 11:20 AM, Bill Appleton wrote:

> on printing, the problem is that i have to port an enterprise application
> that expects to be able to call a fx for the page layout and the page setup
> dialog, a fx to begin/end a page, and a fx to begin/end printing.
> 
> so Cocoa has this amazing system where you initiate printing and the
> printing system CALLS YOU with these requirements, but i need something
> where i CALL THEM because i have to port lots of other code.


Have you considered creating a "go-between" object that would implement the 
APIs your code expects.  And, would also implement the required Cocoa delegate 
APIs?  Your app code then sets info/state on your object which in turn can be 
passed along when the Cocoa delegate methods get called.

Note that this may be an extreme simplification.  I have no idea on the order 
of operations of both APIs and thus don't know if they will work well together 
using this approach.

Maintaining state in your go-between object may also get tricky.
___
Ricky A. Sharp mailto:rsh...@instantinteractive.com
Instant Interactive(tm)   http://www.instantinteractive.com



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Stealing settings from Mail.app

[Greg Guerin]

Chris Idou wrote:

I've got an app that needs to send out emails. I'm trying to import  
mail settings from Mail.app. For some reason my keychain has  
passwords for smtp.gmail.com, but not for smtp.me.com.



AFAIK, there is only the one MobileMe password for all uses.

Double-click your MobileMe password in Keychain Access.app and look  
at its Access Control tab.  Note that Mail.app is always granted  
access by default.


  -- GG

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Bill Appleton]

hi all,

wow, i am getting a lot of help solving these last issues! thanks all.

on printing, the problem is that i have to port an enterprise application
that expects to be able to call a fx for the page layout and the page setup
dialog, a fx to begin/end a page, and a fx to begin/end printing.

so Cocoa has this amazing system where you initiate printing and the
printing system CALLS YOU with these requirements, but i need something
where i CALL THEM because i have to port lots of other code.

now, Core Printing implements all this EXCEPT the dialogs, they are
deprecated in 64 bit, so the missing call is PMSessionPrintDialog

so [NSApp runPageLayout] handles page layout no worries, but NSPrintPanel
can only run the page setup dialog in the context of printing an NSView, and
then you get all the callbacks which i can't implement.

so i needed a way to edit the shared printing info with the standard page
setup dialog, then i can get a copy of the shared printing info & call Core
Printing, all is well

so i did that by subclassing NSPrintPanel and makeing it return "cancel" to
NSPrintOperation even when the shared printing info was actually edited

so that is a rather nasty solution -- but basically anyone trying to port a
large code base with printing is going to run right into this issue
unless i'm missing something



best,

bill







On Fri, May 28, 2010 at 9:04 AM, Kevin Wojniak  wrote:

>
> On May 27, 2010, at 12:43 PM, Bill Appleton wrote:
>
> > *4)** **I **can't call the printing code*
> >
> > I know, the printing code calls me. But other platforms don't work like
> > this. I eventually used Core Printing and the Cocoa dialogs by
> sub-classing
> > and faking out NSPrintPanel. Is there a better way?
>
> Can you be more specific? Have you looked at NSPrintOperation
> setShowsPrintPanel: ?
>
> > *5)** **I **can't create a simple list*
> >
> > I did it the only way I could -- with a table that has one column, etc.
> Man
> > that was painful for a simple list. Is there a better way?
>
> As others have said, but I'll reiterate, bindings make this ridiculously
> easy.
>
> > *6)** **I **can't get the height of some wrapped text*
> >
> > I had to use the layout manager and some major rocket science to get this
> to
> > work right. I'm not saying Text Edit was great, but at least it knows how
> > tall the text field is.
>
> I have a method for doing this and once the initial data is created and
> cached, it takes 4 lines of code to calculate the height of text for a
> width. While it's not as obvious as -[NSAttributedString size], I certainly
> wouldn't consider it rocket science :). I believe the code originated from
> Apple's docs too.
>
> Kevin
>
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Uli Kusterer]

On May 28, 2010, at 4:00 PM, Sherm Pendley wrote:
> I would let the sent objects handle the work themselves. A switch or
> series of ifs based on class is an OOP anti-pattern. Polymorphism is
> often a better alternative, and Objective-C's ability to add a
> category to any class makes it easy to implement. So,  I would extend
> NSString, UIImage, etc. - whatever types can be sent - by adding a new
> method "mySuperDuperMethod" (for example).
> 
> Then, what you're left with in the receiver class is simply:
> 
>if ([obj respondsToSelector(@selector(mySuperDuperMethod))]) {
>[obj performSelector:@selector(mySuperDuperMethod)];
>}
> 
> If the ability of a sent object to implement mySuperDuperMethod is
> critical, you could add an else block to log and/or assert any such
> failures.

 This isn't a good choice in many cases, though. It leads people to tack a lot 
of unrelated functionality onto foundational classes. You'd end up with 
"everything is a dictionary" if you followed through on that.

-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Kevin Wojniak]

On May 27, 2010, at 12:43 PM, Bill Appleton wrote:

> *4)** **I **can't call the printing code*
> 
> I know, the printing code calls me. But other platforms don't work like
> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
> and faking out NSPrintPanel. Is there a better way?

Can you be more specific? Have you looked at NSPrintOperation 
setShowsPrintPanel: ?

> *5)** **I **can't create a simple list*
> 
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?

As others have said, but I'll reiterate, bindings make this ridiculously easy.

> *6)** **I **can't get the height of some wrapped text*
> 
> I had to use the layout manager and some major rocket science to get this to
> work right. I'm not saying Text Edit was great, but at least it knows how
> tall the text field is.

I have a method for doing this and once the initial data is created and cached, 
it takes 4 lines of code to calculate the height of text for a width. While 
it's not as obvious as -[NSAttributedString size], I certainly wouldn't 
consider it rocket science :). I believe the code originated from Apple's docs 
too.

Kevin

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: NSFileManager 'attributesOfItemAtPath:error:' does not traverse a link?

[Kevin Perry]

That documentation is incorrect and is scheduled to be corrected. 
-attribtuesOfItemAtPath:error: will never automatically resolve symlinks, and 
that will never change.

-Kevin Perry

On May 28, 2010, at 8:17 AM, Charles Srstka wrote:

> On May 28, 2010, at 10:01 AM, Tito Ciuro wrote:
> 
>> The old statement traverses the link:
>> 
>>  NSDictionary* attr = [[NSFileManager defaultManager] 
>> fileAttributesAtPath:file traverseLink:YES];
>> 
>> The problem is that the header states that 'attributesOfItemAtPath:error:' 
>> that it's a replacement for 'fileAttributesAtPath:traverseLink:', but 
>> provides no provision for traversing the link.
>> 
>> How would I obtain the attributes of an item that needs to be traversed 
>> first?
> 
> You can easily traverse a link just by using [file 
> stringByResolvingSymlinksInPath] or [file stringByStandardizingPath] instead 
> of file. Where this gets tricky is if you *don’t* want to resolve the 
> symlink. Currently, the method doesn’t traverse symbolic links, but the 
> documentation claims that this behavior could change in a future version of 
> OS X, so if you need to guarantee that it won’t resolve, the only options are 
> either to use deprecated methods, or to use Carbon or BSD APIs.
> 
> Charles___
> 
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> 
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> 
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/kperry%40apple.com
> 
> This email sent to kpe...@apple.com

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: NSFileManager 'attributesOfItemAtPath:error:' does not traverse a link?

[Tito Ciuro]

Thanks Charles!

-- Tito

On May 28, 2010, at 5:17 PM, Charles Srstka wrote:

> On May 28, 2010, at 10:01 AM, Tito Ciuro wrote:
> 
>> The old statement traverses the link:
>> 
>>  NSDictionary* attr = [[NSFileManager defaultManager] 
>> fileAttributesAtPath:file traverseLink:YES];
>> 
>> The problem is that the header states that 'attributesOfItemAtPath:error:' 
>> that it's a replacement for 'fileAttributesAtPath:traverseLink:', but 
>> provides no provision for traversing the link.
>> 
>> How would I obtain the attributes of an item that needs to be traversed 
>> first?
> 
> You can easily traverse a link just by using [file 
> stringByResolvingSymlinksInPath] or [file stringByStandardizingPath] instead 
> of file. Where this gets tricky is if you *don’t* want to resolve the 
> symlink. Currently, the method doesn’t traverse symbolic links, but the 
> documentation claims that this behavior could change in a future version of 
> OS X, so if you need to guarantee that it won’t resolve, the only options are 
> either to use deprecated methods, or to use Carbon or BSD APIs.
> 
> Charles

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: NSFileManager 'attributesOfItemAtPath:error:' does not traverse a link?

[Charles Srstka]

On May 28, 2010, at 10:01 AM, Tito Ciuro wrote:

> The old statement traverses the link:
> 
>   NSDictionary* attr = [[NSFileManager defaultManager] 
> fileAttributesAtPath:file traverseLink:YES];
> 
> The problem is that the header states that 'attributesOfItemAtPath:error:' 
> that it's a replacement for 'fileAttributesAtPath:traverseLink:', but 
> provides no provision for traversing the link.
> 
> How would I obtain the attributes of an item that needs to be traversed first?

You can easily traverse a link just by using [file 
stringByResolvingSymlinksInPath] or [file stringByStandardizingPath] instead of 
file. Where this gets tricky is if you *don’t* want to resolve the symlink. 
Currently, the method doesn’t traverse symbolic links, but the documentation 
claims that this behavior could change in a future version of OS X, so if you 
need to guarantee that it won’t resolve, the only options are either to use 
deprecated methods, or to use Carbon or BSD APIs.

Charles___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Charles Srstka]

On May 27, 2010, at 2:43 PM, Bill Appleton wrote:

> *5)** **I **can't create a simple list*
> 
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?

Have a look at NSArrayController. It makes table views a piece of cake. You set 
one up basically like this:

1. You create an object with an NSArray property, and write the getters and 
setters (or synthesize them).

2. In IB, you drag an NSObjectController into the nib and set its ‘content’ 
outlet to the object in step 1.

3. You now drag an NSArrayController into the nib, and in the Bindings pane of 
its Get Info window, enable its Content Array binding, bind it to your object 
controller, and set the Model Key Path to the name of the property in step 1 
(leave Controller Key at the default, ‘selection’).

4. In the Attributes pane of the NSArrayController’s Get Info window, set Class 
Name to the name of the class of the objects that populate the array.

4. Now, the final step: you select the table column in your NSTableView 
(double-clicking a column body will select the column), bind it to your array 
controller, and set the Value binding to the following: Controller Key is 
arrangedObjects (the default), Model Key Path is the name of a property (or a 
dictionary key, if your objects are NSDictionaries) that will get a nice 
NSString or other displayable object to show in the table column.

And you’re done. Zero code, and your table view is ready to go.

Charles___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

NSFileManager 'attributesOfItemAtPath:error:' does not traverse a link?

[Tito Ciuro]

Hello,

I'm trying to replace the following deprecated NSFileManager method:

> /* attributesOfItemAtPath:error: returns an NSDictionary of key/value pairs 
> containing the attributes of the item (file, directory, symlink, etc.) at the 
> path in question. If this method returns 'nil', an NSError will be returned 
> by reference in the 'error' parameter. This method does not traverse a 
> terminal symlink.
>  
> This method replaces fileAttributesAtPath:traverseLink:.
>  */
> - (NSDictionary *)attributesOfItemAtPath:(NSString *)path error:(NSError 
> **)error;


The old statement traverses the link:

NSDictionary* attr = [[NSFileManager defaultManager] 
fileAttributesAtPath:file traverseLink:YES];

The problem is that the header states that 'attributesOfItemAtPath:error:' that 
it's a replacement for 'fileAttributesAtPath:traverseLink:', but provides no 
provision for traversing the link.

How would I obtain the attributes of an item that needs to be traversed first?

Thanks,

-- Tito
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Where is zlib located?

[Tito Ciuro]

Thanks a lot Roland!

-- Tito

On May 28, 2010, at 8:51 AM, Roland King wrote:

> libz.dylib
> 
> it's the last thing listed in the list if I go 'add framework' -> 'existing 
> frameworks'. 
> 
> 
> On 28-May-2010, at 2:40 PM, Tito Ciuro wrote:
> 
>> Hello,
>> 
>> I'm trying to incorporate zip-framework 
>> (http://code.google.com/p/zip-framework/) in my project. When I compile the 
>> sources in Xcode I see this error:
>> 
>>> "inflate", referenced from:
>>> -readFromEntry:buffer:length: in ZipArchive.o
>>> 
>>> "inflateInit2", referenced from: -entryNamed: in ZipArchive.o
>>> 
>>> ld: symbol(s) not found collect2: ld returned 1 exit status
>> 
>> The sources import zlib.h, so I guess I need to add zlib to my project, but 
>> I cannot find it. Where is it located?
>> 
>> Thanks,
>> 
>> -- Tito
>> ___
>> 
>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>> 
>> Please do not post admin requests or moderator comments to the list.
>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>> 
>> Help/Unsubscribe/Update your Subscription:
>> http://lists.apple.com/mailman/options/cocoa-dev/rols%40rols.org
>> 
>> This email sent to r...@rols.org
> 

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Sherm Pendley]

On Thu, May 27, 2010 at 8:25 PM, Philip Vallone
 wrote:
>
> This is a relative question, which depends on how the data is coming and 
> going. My question comes from the following situation. Suppose I have a 
> GKSession that is passing information via Bluetooth. The sender can send any 
> type of information (NSString, UIImage etc...). The receiver needs to know 
> how to handle this data. If there is a better way... Then how?
>
> I appreciate the feed back and help,

I would let the sent objects handle the work themselves. A switch or
series of ifs based on class is an OOP anti-pattern. Polymorphism is
often a better alternative, and Objective-C's ability to add a
category to any class makes it easy to implement. So,  I would extend
NSString, UIImage, etc. - whatever types can be sent - by adding a new
method "mySuperDuperMethod" (for example).

Then, what you're left with in the receiver class is simply:

if ([obj respondsToSelector(@selector(mySuperDuperMethod))]) {
[obj performSelector:@selector(mySuperDuperMethod)];
}

If the ability of a sent object to implement mySuperDuperMethod is
critical, you could add an else block to log and/or assert any such
failures.

sherm--

-- 
Cocoa programming in Perl:
http://www.camelbones.org
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Antonio Nunes]

On 28 May 2010, at 12:07, Uli Kusterer wrote:

> Are you doing this for Finder-originated copying only? In this case, you 
> could probably look at the file's OSType/creator. I believe they get set to 
> some special "busy"-values during copying, so if you get a write notification 
> and your file has that type, you *know* it's not intended to be processed yet.

I expect many of the files will arrive in the watched folder either through 
user manipulation in the Finder or through scripts/automation. I don't think I 
can assume only Finder-originated copying.

António

-
Perfume is the forgiveness
that the trampled flower casts
upon the heel that crushes it.
-



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Antonio Nunes]

On 28 May 2010, at 12:15, Jean-Daniel Dupas wrote:

> I hope you properly defined what you mean by "operation", because on a file 
> system point of view, this is already what kqueue does.
> A copy is not one operation but a bunch of operations (open, lots of write, 
> close, set attrs, set xattrs, …), and kqueue already notify you each time an 
> operation is done.

Hmm, I see, better have another good look at the notifications the I can choose 
to listen to. Thanks. Looks like an attribute change notification and a size 
increase notification might be useful candidates. I'll play with them and see 
what results I can get.

António


A merry heart does good like medicine



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: isKindofClass with NSData and NSKeyUnarchiver

[Uli Kusterer]

On May 28, 2010, at 2:25 AM, Philip Vallone wrote:
> This is a relative question, which depends on how the data is coming and 
> going. My question comes from the following situation. Suppose I have a 
> GKSession that is passing information via Bluetooth. The sender can send any 
> type of information (NSString, UIImage etc...). The receiver needs to know 
> how to handle this data. If there is a better way... Then how?

Haven't used GameKit yet, but programs rarely need to send *raw* data. What 
they usually need to send is some higher-level concept, in your case that could 
be a "game command". So what you'd usually do is create some NSObject subclass 
that encapsulates the general API of a "command". You'd in turn create separate 
subclasses for the individual commands. NSArchiver already knows how to 
recreate that object, so you'd then just call an -apply method the base class 
declares but the subclasses implement, and you'd have everything working 
automatically.

The subclass would then take care of unarchiving the expected image resp. 
string and do with it whatever needs to be done (e.g. update the player avatar 
with that image, or display the given message from the other user, or apply the 
movements of a remote user to the local game state.

(Of course, there are security/robustness considerations with any network 
communication to avoid trickery, or just keep cheaters from pretending their 
player had moved by 6 miles in a split-second and thus wasn't shot, but that's 
not part of this discussion)

-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Jean-Daniel Dupas]

Le 28 mai 2010 à 12:53, Antonio Nunes a écrit :

> On 28 May 2010, at 11:41, Antonio Nunes wrote:
> 
>> I was hoping the system would provide something better for this. Looks like 
>> an enhancement request is in order.
> 
> Request filed. Bug ID# 8038793: "Need notification of file system 
> modification after completion of the operation".
> 

I hope you properly defined what you mean by "operation", because on a file 
system point of view, this is already what kqueue does.
A copy is not one operation but a bunch of operations (open, lots of write, 
close, set attrs, set xattrs, …), and kqueue already notify you each time an 
operation is done.

-- Jean-Daniel

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Uli Kusterer]

On May 28, 2010, at 12:53 PM, Antonio Nunes wrote:
> On 28 May 2010, at 11:41, Antonio Nunes wrote:
>> I was hoping the system would provide something better for this. Looks like 
>> an enhancement request is in order.
> 
> Request filed. Bug ID# 8038793: "Need notification of file system 
> modification after completion of the operation".

Are you doing this for Finder-originated copying only? In this case, you could 
probably look at the file's OSType/creator. I believe they get set to some 
special "busy"-values during copying, so if you get a write notification and 
your file has that type, you *know* it's not intended to be processed yet.

-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Antonio Nunes]

On 28 May 2010, at 11:41, Antonio Nunes wrote:

> I was hoping the system would provide something better for this. Looks like 
> an enhancement request is in order.

Request filed. Bug ID# 8038793: "Need notification of file system modification 
after completion of the operation".

Cheers,
António


There is nothing as strong as real gentleness, and
there is nothing as gentle as real strength.





___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Antonio Nunes]

On 28 May 2010, at 11:30, Uli Kusterer wrote:

> The heuristic most people use is to wait a little time (a few seconds is 
> usually enough) and only start processing a file if a new write notification 
> hasn't arrived in the meantime. I usually use my UKPushbackMessenger for that 
> purpose (see 
> http://github.com/uliwitness/UliKit/blob/master/UKPushbackMessenger.h 
> andhttp://github.com/uliwitness/UliKit/blob/master/UKPushbackMessenger.m).

Gruezi Uli,

I was hoping the system would provide something better for this. Looks like an 
enhancement request is in order.

Since PDF documents can potentially be huge, and I need to keep performance as 
good as possible, I need something more robust than waiting a few seconds. I am 
now experimenting with trying to read in a PDFDocument from the url, and not 
spawn the worker thread until this succeeds. Initial results look promising. 
The thread that sets up the task waits until it can successfully read in a 
PDFDocument from the URL, then releases the document and launches the task. I 
find this a bit of a hack, but if it works, it works, and I think this provides 
tighter performance than waiting for a set number of seconds (which may in 
extreme cases not to be long enough anyway).

Best,
António

---
Don't believe everything you think
---




___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Notification of file system modification arrives too early?

[Uli Kusterer]

On May 28, 2010, at 12:05 PM, Antonio Nunes wrote:
> My app is set to observe a folder for changes to its contents (...) I get the 
> impression the notification happens as soon as the file transfer into the 
> watched directory begins, and my worker thread is ready and starts loading 
> the file before it has been fully transferred. Hence the failure to create a 
> PDFDocument from the file.

 Yes. A KQueue only tells you when a *change* happens, i.e. an individual write 
operation.

> Is there a way to check whether the file has been fully transferred, or, even 
> better, to get notified only when the file transfer has been completed?

 The heuristic most people use is to wait a little time (a few seconds is 
usually enough) and only start processing a file if a new write notification 
hasn't arrived in the meantime. I usually use my UKPushbackMessenger for that 
purpose (see 
http://github.com/uliwitness/UliKit/blob/master/UKPushbackMessenger.h and 
http://github.com/uliwitness/UliKit/blob/master/UKPushbackMessenger.m).

-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Notification of file system modification arrives too early?

[Antonio Nunes]

Hi,

My app is set to observe a folder for changes to its contents (using UKKQueue. 
Thanks Uli! :-)). When files are dropped into the folder the app is notified 
and processes the files. This works well, except for one catch: sometimes we 
receive the notification and spawn the worker thread, and trying to load the 
file fails ( [[PDFDocument alloc] initWithURL:sourceURL] returns nil). This 
seems to happen predominantly with large files. I get the impression the 
notification happens as soon as the file transfer into the watched directory 
begins, and my worker thread is ready and starts loading the file before it has 
been fully transferred. Hence the failure to create a PDFDocument from the file.

Is there a way to check whether the file has been fully transferred, or, even 
better, to get notified only when the file transfer has been completed?

António

---
What you have inside you expresses itself through both your
choice of words and the level of energy you assign to them.
The more healed, whole and connected you feel inside,
the more healing your words will be.

--Rita Goswami
---


___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

NSURLConnection weirdiness

[Nava Carmon]

Hi,

I'm experiencing a weird problem and i wonder if anybody else has noticed this: 
I'm using NSURLConnection as it appears in apple's examples to get xml files 
from a certain server (standard http get) - pretty straight forward. And most 
of time it works, but sometimes it's just stuck after initialing and don't get 
into connection's delegate methods. I'm working with WiFi & 3G and the same 
server all the time. When it comes to didFailWithError i see that mostly it was 
a timeout error. When I enter same link in Safari it takes a second to bring 
data. And after another trial I can access the link. What might be the reason 
for such a weird behavior? How can I improve it? What is the role of cache 
policy with NSURLConnection?

Thanks,

Nava


Nava Carmon
ncar...@mac.com

"Think good and it will be good!"

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Tony Romano]

To see if a file is hidden, I use on the URL(NSURL Class) for the file, 
resourceValuesForKeys and pass in the array of properties you are looking for.  
In the case of  a hidden file, use NSURLIsHiddenKey.
You should be able to make a file hidden as well by using the set counter part. 
 Check out the NSURL class.

-Tony

On May 28, 2010, at 1:10 AM, Alastair Houghton wrote:

> On 27 May 2010, at 20:43, Bill Appleton wrote:
> 
>> *1) I can't hide a file, or test if a file is hidden*
>> 
>> I had to resort to FSGetCatalogInfo -- there is no way to do it through
>> NSFileManager, etc. Right?
> 
> chflags(), with UF_HIDDEN?  And stat() to read the same?
> 
> I don't think FSGet/SetCatalogInfo is deprecated on 64-bit though, so you 
> could just use that if you're more comfortable doing it that way.
> 
>> *5)** **I **can't create a simple list*
>> 
>> I did it the only way I could -- with a table that has one column, etc. Man
>> that was painful for a simple list. Is there a better way?
> 
> It's not *that* painful.  In fact, if you use bindings and an 
> NSArrayController, it's pretty much done for you.
> 
>> *6)** **I **can't get the height of some wrapped text*
>> 
>> I had to use the layout manager and some major rocket science to get this to
>> work right. I'm not saying Text Edit was great, but at least it knows how
>> tall the text field is.
> 
> NSAttributedString's -boundingRectWithSize:options: is probably helpful for 
> this, depending on exactly what size you're after (there's more than one 
> possible set of dimensions you might care about, depending on exactly what 
> you're doing).
> 
> Cocoa Text is, I think, a bit daunting when you first encounter it; it's very 
> powerful and exposes a great deal of the underlying machinery behind text 
> rendering, but the flip-side of that is that it's a huge API and that alone 
> can be off-putting.  I think once you get over that, it's actually pretty 
> easy to use---and if you're worried that it all seems a bit heavyweight to 
> "just" draw a string, remember that most of what it does is actually 
> necessary to get the string on the display, so all of the simpler APIs you 
> might have used previously were still doing all of the same work (give or 
> take).
> 
> Kind regards,
> 
> Alastair.
> 
> --
> http://alastairs-place.net
> 
> 
> 
> ___
> 
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> 
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> 
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/tonyrom%40hotmail.com
> 
> This email sent to tony...@hotmail.com
> 

-Tony

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Chaitanya Pandit]

> 
> *3)** **I **can't get t**he right dimensions for a QuickTime movie or poster
> *
> 

NSSize movieSize =  [[movieObject currentFrameImage] size];

> I used to call GetMovieBox, so I tried using [QTMovie posterImage] but the
> NSImage reported a width and height of 100, and then my movie poster was
> really pixelated. How do I get a decent looking movie poster? How do I get
> the original dimensions for movie playback?
> 
> 
> *4)** **I **can't call the printing code*
> 
> I know, the printing code calls me. But other platforms don't work like
> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
> and faking out NSPrintPanel. Is there a better way?
> 
> 
> *5)** **I **can't create a simple list*
> 
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?
> 
> 
> *6)** **I **can't get the height of some wrapped text*
> 
> I had to use the layout manager and some major rocket science to get this to
> work right. I'm not saying Text Edit was great, but at least it knows how
> tall the text field is.
> 
> 
> 
> 
> Thanks!
> 
> 
> Bill Appleton
> ___
> 
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
> 
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
> 
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/chaitanya%40expersis.com
> 
> This email sent to chaita...@expersis.com

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Alastair Houghton]

On 27 May 2010, at 20:43, Bill Appleton wrote:

> *1) I can't hide a file, or test if a file is hidden*
> 
> I had to resort to FSGetCatalogInfo -- there is no way to do it through
> NSFileManager, etc. Right?

chflags(), with UF_HIDDEN?  And stat() to read the same?

I don't think FSGet/SetCatalogInfo is deprecated on 64-bit though, so you could 
just use that if you're more comfortable doing it that way.

> *5)** **I **can't create a simple list*
> 
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?

It's not *that* painful.  In fact, if you use bindings and an 
NSArrayController, it's pretty much done for you.

> *6)** **I **can't get the height of some wrapped text*
> 
> I had to use the layout manager and some major rocket science to get this to
> work right. I'm not saying Text Edit was great, but at least it knows how
> tall the text field is.

NSAttributedString's -boundingRectWithSize:options: is probably helpful for 
this, depending on exactly what size you're after (there's more than one 
possible set of dimensions you might care about, depending on exactly what 
you're doing).

Cocoa Text is, I think, a bit daunting when you first encounter it; it's very 
powerful and exposes a great deal of the underlying machinery behind text 
rendering, but the flip-side of that is that it's a huge API and that alone can 
be off-putting.  I think once you get over that, it's actually pretty easy to 
use---and if you're worried that it all seems a bit heavyweight to "just" draw 
a string, remember that most of what it does is actually necessary to get the 
string on the display, so all of the simpler APIs you might have used 
previously were still doing all of the same work (give or take).

Kind regards,

Alastair.

--
http://alastairs-place.net



___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Generating PDF images (+followup question)

[Ken Ferry]

Heh.  Okay, glad that made sense, but as discussed in all the other
resources, yes, context flippedness is a piece of _metadata_ orthogonal from
the CTM.  You may consult it to get the high level notion of which way
should be considered "up".

On Fri, May 28, 2010 at 12:22 AM, Graham Cox  wrote:

> Hallelujah!!!
>
> Thanks Stephen, that's the piece of the puzzle I was missing. I was
> assuming (or misinterpreting) that passing flipped:YES for the
> NSGraphicsContext ACTUALLY FLIPPED the context, not just informed it that
> the context had been flipped.
>
> I found I had to set the CTM after the CGPDFContextBeginPage - looks like
> that might be resetting it, but basically, it works, I now get a right-way
> up PDF file.
>
> Now I know my source data really is right-side up, I can figure out the
> second part which is making sure images that embody it DRAW right-side up.
>
> thanks again, greatly relieved!
>
> --Graham
>
>
>
> On 28/05/2010, at 5:11 PM, Stephen J. Butler wrote:
>
> > CGContextTranslateCTM( pdfContext, 0.0, size.height );
> > // Now "flip" the y-axis so that it increases downwards
> > CGContextScaleCTM( pdfContext, 1.0, -1.0 );
>
> ___
>
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/kenferry%40gmail.com
>
> This email sent to kenfe...@gmail.com
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Generating PDF images (+followup question)

[Graham Cox]

Hallelujah!!!

Thanks Stephen, that's the piece of the puzzle I was missing. I was assuming 
(or misinterpreting) that passing flipped:YES for the NSGraphicsContext 
ACTUALLY FLIPPED the context, not just informed it that the context had been 
flipped.

I found I had to set the CTM after the CGPDFContextBeginPage - looks like that 
might be resetting it, but basically, it works, I now get a right-way up PDF 
file.

Now I know my source data really is right-side up, I can figure out the second 
part which is making sure images that embody it DRAW right-side up.

thanks again, greatly relieved!

--Graham



On 28/05/2010, at 5:11 PM, Stephen J. Butler wrote:

> CGContextTranslateCTM( pdfContext, 0.0, size.height );
> // Now "flip" the y-axis so that it increases downwards
> CGContextScaleCTM( pdfContext, 1.0, -1.0 );

___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: Generating PDF images (+followup question)

[Stephen J. Butler]

On Fri, May 28, 2010 at 1:36 AM, Graham Cox  wrote:
> I understand that contexts can (still) be flipped.
>
> Let's break this down a bit, since I'm fighting two problems simultaneously 
> here. First, PDF File generation.
>
> Using the code I quoted, I generate PDF data in a flipped context. The 
> flipped context matches the coordinate system that drawn objects expect. As 
> such, objects and text are all positioned in the correct relative locations.
>
> If I write the PDF data immediately to a file, no NSImage or rep involved, 
> result is an upside down PDF file when it's opened in Preview.
>
> If I generate the PDF data in a non-flipped context, the PDF File is still 
> upside down, with the added problem that text glyphs are inverted 
> individually.
>
> So at no point have I done anything with this image like draw it anywhere. 
> How can it even be possible for PDF data in a file to be inverted? The 
> problem appears to be with the PDF generation, so what's wrong there?

My understanding of this isn't the best, but here's how I see it:

The idea of "flipped/not-flipped" is a Cocoa idea. But CGContexts
aren't Cocoa and they don't have the notion of being flipped or not.
That's exactly why the +[NSGraphicsContext
graphicsContextWithGraphicsPort:flipped:] call has to ask if the CG
context it is getting is flipped or not! If the CG context knew,
NSGraphicsContext could just ask it.

So, your view is flipped and all your drawing operations assume a
flipped context. How do we get there for PDFs? Simple... we apply a
Current Transformation Matrix (CTM) that flips the CG context!
Something like this should work:

// Move the origin to the top of the context
CGContextTranslateCTM( pdfContext, 0.0, size.height );
// Now "flip" the y-axis so that it increases downwards
CGContextScaleCTM( pdfContext, 1.0, -1.0 );

And now you would pass flipped:YES to +[NSGraphicsContext
graphicsContextWithGraphicsPort:flipped:] because we just flipped it!

Basically, you were almost there. You got a perfect PDF file, just
upside down. Another way to look at all of this is "what CTM do I need
to apply to get everything right side up?" The answer is, flip the
y-axis over y=0 (the x-axis) and add the height.
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com

Re: six things I wasn't able to do with Cocoa

[Ken Ferry]

Hi Bill,

Thanks for the postmortem.  Would you mind filing bugs for the items you
think are too difficult?

On Thu, May 27, 2010 at 12:43 PM, Bill Appleton <
billapple...@dreamfactory.com> wrote:

> hi all,
>
>
> I just ported a huge code base to Cocoa, Core Graphics, Core Audio, and
> QuickTime. Basically I had a good experience, but there were some things i
> noticed that i couldn't do easily in Cocoa or any other 64 bit OSX API.
>
> So just in case anyone knows a way to do the things listed below please let
> me know:
>
>
> *1) I can't hide a file, or test if a file is hidden*
>
> I had to resort to FSGetCatalogInfo -- there is no way to do it through
> NSFileManager, etc. Right?
>

These two are pretty easy in 10.6.  -[NSURL getResourceValue:forKey:error:]
/ -[NSURL setResourceValue:forKey:error:] with NSURLIsHiddenKey.  Cocoa is
trying to standardize on URLs rather than paths.


> *2)** **I **can't **get the current caret blink rate in milliseconds*
>
> I used to call GetCaretTime, but now I just use 500 milliseconds. Eeek!
> Where is the current blink rate? Please don't tell me I don't need it, we
> implement our own scripting engine, etc.
>

The actual default rate is once per 0.56 seconds.

*3)** **I **can't get t**he right dimensions for a QuickTime movie or poster
> *
>
> I used to call GetMovieBox, so I tried using [QTMovie posterImage] but the
> NSImage reported a width and height of 100, and then my movie poster was
> really pixelated. How do I get a decent looking movie poster? How do I get
> the original dimensions for movie playback?
>

Perhaps QTMovieNaturalSizeAttribute ? I'm not familiar with this API, but
there are a few size-related attributes.


> *4)** **I **can't call the printing code*
>
> I know, the printing code calls me. But other platforms don't work like
> this. I eventually used Core Printing and the Cocoa dialogs by sub-classing
> and faking out NSPrintPanel. Is there a better way?
>

I don't understand this one.  <
http://developer.apple.com/mac/library/documentation/cocoa/conceptual/Printing/Tasks/CreatingPrintJob.html
>.

*5)** **I **can't create a simple list*
>
> I did it the only way I could -- with a table that has one column, etc. Man
> that was painful for a simple list. Is there a better way?
>

I'm not sure how much of NSTableView's behavior you want, but it's possible
you'd find NSCollectionView to be simpler.


> *6)** **I **can't get the height of some wrapped text*
>
> I had to use the layout manager and some major rocket science to get this
> to
> work right. I'm not saying Text Edit was great, but at least it knows how
> tall the text field is.
>

NSLayoutManager might be appropriate, but there's also
-[NSString boundingRectWithSize:options:attributes:].  You might find <
http://lists.apple.com/archives/Cocoa-dev/2008/Jan/msg00814.html> helpful.

-Ken


>
>
>
> Thanks!
>
>
> Bill Appleton
> ___
>
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/kenferry%40gmail.com
>
> This email sent to kenfe...@gmail.com
>
___

Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com

This email sent to arch...@mail-archive.com