This is turning out to be a lot trickier than I had expected. [I note that
there is currently another thread in this list with a similar concern but
I'm not sure if our problems are identical.]
In my case, I have a main app with an NSArray of subtasks (inheriting from
NSObject), initialized then
Hi all,
I'm trying to find the best approach to data storage with a cocoa application.
I've got my application working and saving document specific data to a file,
but I also need a larger data file of persistent data, that shouldn't be
duplicated. I'm considering imbedding an SQLite database
Try simplifying your app by eliminating the use of background threads. Or,
if you feel you must use background threads for long-running computation, use
them only for handling the data after receiving it. Do everything involving
launching the task and initiating background reads of its
I'm trying to find the best approach to data storage with a cocoa application.
I've got my application working and saving document specific data to a file,
but I also need a larger data file of persistent data, that shouldn't be
duplicated. I'm considering imbedding an SQLite database into
Dear Billy,
It might depend on whether you want to remain cross platform or not.
Also, if your requirements are very limited, CoreData might be considered
overkill.
On the other hand, CoreData has great integration with NSDocument type
applications and Cocoa UIs.
Kind regards,
Samuel
On
So long as the application is single user, core data or sqlite are both
excellent options. I personally prefer sqlite, as I find it easier to work
with than core data. The problem I have with core data is that it's usage is
so tightly wound to the managed object interface, that is can be
Hi Samuel,
Is it possible to get core data data models to save differently, one for a
document save which for example might be an XML format, and one into the
applications bundle as an SQLite file?
That way when a document is saved the main database won't be duplicated, just
the document
On Apr 10, 2010, at 2:13 AM, Gerriet M. Denkmann wrote:
The documentation (updated this morning) says: An IKImageView object’s
delegate [...] is informed of various actions by the image view through
delegation messages.
Why do you say that the documentation has been edited? When I look
This works (but is deprecated in 10.6):
NSOpenGLPixelFormat *pixelFomat =
CGLPixelFormatObj b = [ pixelFomat CGLPixelFormatObj ];
CGLContextObj a = CGLGetCurrentContext();
ciContext = [ CIContext contextWithCGLContext:
Le 12 avr. 2010 à 16:39, Gerriet M. Denkmann a écrit :
This works (but is deprecated in 10.6):
NSOpenGLPixelFormat *pixelFomat =
CGLPixelFormatObj b = [ pixelFomat CGLPixelFormatObj ];
CGLContextObj a = CGLGetCurrentContext();
Hi Billy
Is it possible to get core data data models to save differently, one for a
document save which for example might be an XML format, and one into the
applications bundle as an SQLite file?
That way when a document is saved the main database won't be duplicated, just
the document
Hi again!
I'd like to change the place of a NSManagedObject stored in a NSArrayController
in entity mode (after a drag'n drop operation). I didn't find any suitable
primitive, so I decided to go something like removeAtSomeIndex and then
immediately after insertAtSomeOtherIndex.
However, it
On Apr 12, 2010, at 8:46 AM, Rasmus Skaarup wrote:
Try simplifying your app by eliminating the use of background threads. Or,
if you feel you must use background threads for long-running computation,
use them only for handling the data after receiving it. Do everything
involving
On Apr 6, 2010, at 8:16 PM, Ken Ferry wrote:
This was once true, but is out of date. I'd like to see a test
app. For example, how do you know you aren't getting
antialiasing? It may be that you just don't like the output. :-)
Well - NSImageInterpolationHigh and NSImageInterpolationNone
McLaughlin, Michael P wrote:
Is there a recommended (better) way of sending and receiving a
known (large)
amount of data to and from a subtask? Is there any sample code
anywhere
similar to what I need? I couldn't find anything close enough to
work.
Reading your description, my first
McLaughlin, Michael P. wrote:
main -- subtask (main send data)
-(void)sendData:(void*)data numBytes:(NSUInteger)sz taskTag:
(NSString*)tag
{
NSData *dataset = [NSData dataWithBytes:data length:sz];
NSNumber *num = [NSNumber numberWithUnsignedInteger:sz]; //
NSUInteger
NSDictionary
On 12 Apr 2010, at 21:39, Brian Postow wrote:
On Apr 10, 2010, at 2:13 AM, Gerriet M. Denkmann wrote:
The documentation (updated this morning) says: An IKImageView object’s
delegate [...] is informed of various actions by the image view through
delegation messages.
Why do you say
On Apr 12, 2010, at 9:09 AM, Greg Guerin wrote:
You must send the notification with size and such BEFORE writing to the pipe.
Otherwise the sender can become blocked, because the receiver doesn't know
it should be reading anything.
And it seems strange to use a second mechanism (a
On Apr 12, 2010, at 7:36 AM, Billy Flatman wrote:
Is it possible to get core data data models to save differently, one for a
document save which for example might be an XML format, and one into the
applications bundle as an SQLite file?
That way when a document is saved the main database
A date-time is a date-time, regardless of how it is
displayed or entered or obtained from the system.
The whole purpose of the NSDate object is to allow easy
comparison, and determination of intervals by subtraction...
well, a couple of the main purposes... and be able to
display dates and
On Apr 9, 2010, at 10:35 , McLaughlin, Michael P. wrote:
My main thread has an NSArray of Subtasks and sends data to each via
Npending = numProcessors;
for (k = 0;k numProcessors;k++) {
Subtask *aTask = [myTask objectAtIndex:k];
[aTask sendData:theData numBytes:sz
On Apr 12, 2010, at 08:15, vincent habchi wrote:
I'd like to change the place of a NSManagedObject stored in a
NSArrayController in entity mode (after a drag'n drop operation). I didn't
find any suitable primitive, so I decided to go something like
removeAtSomeIndex and then immediately
On 12 Apr 2010, at 21:55, Jean-Daniel Dupas wrote:
Le 12 avr. 2010 à 16:39, Gerriet M. Denkmann a écrit :
This works (but is deprecated in 10.6):
NSOpenGLPixelFormat *pixelFomat =
CGLPixelFormatObj b = [ pixelFomat CGLPixelFormatObj ];
On 12 Apr 2010, at 17:33, Jens Alfke wrote:
There are also other data storage libraries that have a simpler data model
than sqlite (they’re like on-disk NSDictionaries) so they’re a bit simpler to
use and can potentially run faster. Tokyo Cabinet seems like the main
contender in that area
On Apr 12, 2010, at 9:35 AM, Jeffrey Oleander wrote:
A date-time is a date-time, regardless of how it is
displayed or entered or obtained from the system.
The whole purpose of the NSDate object is to allow easy
comparison, and determination of intervals by subtraction...
Yup. An NSDate is
This a Hail Mary pass...
I have a bizarre bug. Perhaps someone has a hunch about what's going on.
My application prefs file, which is managed with NSUserDefaults, is getting
reset to default values, but so far only on a PPC running 10.5.8 and only
during the wee hours of Monday mornings. (Go
On Mon, Apr 12, 2010 at 8:59 AM, Chris Tracewell ch...@thinkcl.com wrote:
On Apr 6, 2010, at 8:16 PM, Ken Ferry wrote:
This was once true, but is out of date. I'd like to see a test app. For
example, how do you know you aren't getting antialiasing? It may be that
you just don't like the
Quincy,
(sorry for the double answer)
This is likely NOT a Core Data question. Most likely you're not doing your
memory management quite correctly. Look here under the heading Mutable
Arrays:
Another consideration is:
Is this a project that could ever need a multi-user or networked data engine?
If the above answer is yes, then CoreData is probably a bad option (though
Marko's excellent BaseTen for PostgreSQL might be an option in that case), as
the options for migrating Managed
Greg Guerin wrote
The fundamental design is send all data before looking for any
results. This is inherently synchronous, even though two or more
processes are involved. If the subtask is designed to read all data
before producting any results, then it shouldn't deadlock. However,
if the
On Apr 12, 2010, at 10:54 AM, Dru Satori wrote:
One application that can be used standalone, or always on multi-user
or with multiple disconnected users synchronizing data when peered.
Complex? You have no idea. But in the design process, many
decisions had to be made, that meant
On Apr 12, 2010, at 10:14, vincent wrote:
I did try to insert the moved object in another array *before* deleting and
reinserting it (and then deleting it from the other array). AFAIK, inserting
an object in a NSArray retains it. TO no avail.
Ah, ok, sorry -- trying the easiest answer first
The @*$ listserv is stripping the HTML from messages, so the links in
my previous post got lost. (I guess hyperlinking is too newfangled a
concept for Mailman?)
CouchDB: http://couchdb.apache.org
Ubuntu DesktopCouch: http://www.freedesktop.org/wiki/Specifications/desktopcouch
On Apr 12, 2010, at 10:21, Eric Long wrote:
This a Hail Mary pass...
I have a bizarre bug. Perhaps someone has a hunch about what's going on.
My application prefs file, which is managed with NSUserDefaults, is getting
reset to default values, but so far only on a PPC running 10.5.8 and
The view that has the combo box, for example, has a Object Controller (called
NoteObjectController) binded to my file's owner (MyDocument : NSDocument) with
the Model Key Path to the MOC and the object controller is an entity of my
model I created in Core Data. The combo box is binded to the
On Apr 12, 2010, at 11:08 AM, Jens Alfke j...@mooseyard.com wrote:
The @*$ listserv is stripping the HTML from messages, so the links
in my previous post got lost. (I guess hyperlinking is too
newfangled a concept for Mailman?)
I think you meant to say The listserv is sparing us from the
Quincey,
thanks a lot
Surely it would be more robust to make the order explicit in your data model
(with a transient property if the order really is transient) and let the
array controller keep the displayed content sorted according to that order?
Sure, I could do that. In fact I have done
I looked at it pretty hard, but in the end I went with a traditional RDBMS,
largely for the eventual need to expose the interface to external reporting
tools, that as a rule don't talk custom interfaces. Admittedly, I borrowed
some concepts though.
Design wise the 'server' in my configuration
Honestly I am surprised that apple has not adopted one of the OSS database
engines as a standard db in osx and implemented core data on top of it for
multi user implementations.
If for no other reason than to shoot at Microsoft over the mssql as part of the
file system debacle
Andy 'Dru'
The documentation for the filters property of the CALayer class says:
Filter properties should be modified by calling setValue:forKeyPath: on
each layer that the filter is attached to. But I don't understand
exactly how to write the key path, since the filters property is an
array rather than
In my app so far, I have not even gotten to the point where the subtask
produces any output. I am sending all data from main but main blocks iff
the number of bytes sent 65536.
There's nothing inherent about that number, as shown in the following test case:
http://themha.com/ipctest
On Apr 12, 2010, at 1:15 PM, James Walker wrote:
The documentation for the filters property of the CALayer class says: Filter
properties should be modified by calling setValue:forKeyPath: on each layer
that the filter is attached to. But I don't understand exactly how to write
the key
On Mon, Apr 12, 2010 at 12:12 PM, vincent habchi vi...@macports.org wrote:
Besides, the proxy solution has one advantage: since the object in the
NSArrayController reacts to actions performed on buttons linked to it, I
think it is better to have code in the proxy object rather than on the
On Mon, Apr 12, 2010 at 1:22 PM, David Duncan david.dun...@apple.com wrote:
You need to assign a name to each filter, then you can create keypaths like
@filters.myfiltername.property.
Can we get some explanation of the magic involved in CALayer KVC
support? Why is -setValue:forKeyPath:
How do I get a list of style names for a particular font family for
iPhone/iPad? I can get the full font names and have my own font picker
which shows those. However, that is not what I really want. I want the
secondary list to show the common names, i.e., Bold, Italic, etc., like
is shown in
http://www.alexcurylo.com/blog/2008/10/05/snippet-available-uifonts/
On Mon, Apr 12, 2010 at 5:03 PM, Gordon Apple g...@ed4u.com wrote:
How do I get a list of style names for a particular font family for
iPhone/iPad? I can get the full font names and have my own font picker
which shows
On Apr 12, 2010, at 12:12, vincent habchi wrote:
Sure, I could do that. In fact I have done it: This order is not a property
of the inserted object, but of one liked therewith. But tell me, would
drag-and-drop work by just rearranging an object ID?
Besides, the proxy solution has one
On 12 Apr 2010, at 4:08 PM, Eric E. Dolecki wrote:
http://www.alexcurylo.com/blog/2008/10/05/snippet-available-uifonts/
That gets you things like CourierNewPS-BoldItalicMT, which the OP made clear
he doesn't want. He wants to know how to get the two strings Courier New and
Bold Italic. The
Hi,
I would like to implement a set-hotkey option,
where the user presses a hotkey, the app registers the key-combination and
makes a global key-shortcut.
Does someone here know a good tutorial or has some hints where to start?
thanks for any help.
On Mon, Apr 12, 2010 at 2:47 PM, Fritz Anderson fri...@manoverboard.org wrote:
That gets you things like CourierNewPS-BoldItalicMT, which the OP made
clear he doesn't want. He wants to know how to get the two strings Courier
New and Bold Italic. The first can come from [UIFont familyNames],
The Shortcut Recorder works pretty darn well:
http://code.google.com/p/shortcutrecorder/
The test project uses the PTHotKey library to demonstrate hotkey functionality,
but I've found PTHotKey to be somewhat cumbersome, so I wrote my own wrapper:
http://github.com/davedelong/DDHotKey
Cheers,
On Apr 12, 2010, at 1:30 PM, Kyle Sluder wrote:
On Mon, Apr 12, 2010 at 1:22 PM, David Duncan david.dun...@apple.com wrote:
You need to assign a name to each filter, then you can create keypaths like
@filters.myfiltername.property.
Can we get some explanation of the magic involved in
Thanks for the response, but that is what I have now and am trying to get
away from. I want ³normal², ³bold² and ³Italic², not ³Veranda²,
³Veranda-Bold² and ³Veranda-Italic² for the secondary list. In many cases
it might be possible to strip the font Family name, but the font naming
convention
On Mon, Apr 12, 2010 at 3:08 PM, Gordon Apple g...@ed4u.com wrote:
Thanks for the response, but that is what I have now and am trying to get
away from. I want ³normal², ³bold² and ³Italic², not ³Veranda²,
³Veranda-Bold² and ³Veranda-Italic² for the secondary list. In many cases
it might be
Thanks. That did it. I just needed a display name. I used the following
when loading the picker view:
- (NSString*)styleNameForIndex:(NSUInteger)index
inFontFamily:(NSString*)famName {
NSString* fontName = [[UIFont fontNamesForFamilyName:famName]
objectAtIndex:index];
CTFontRef fontRef
On 12 Apr 2010, at 10:56, McLaughlin, Michael P. wrote:
Greg Guerin wrote
The fundamental design is send all data before looking for any
results. This is inherently synchronous, even though two or more
processes are involved. If the subtask is designed to read all data
before producting any
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