Printing graphics plus text
Please forgive me if my question is stupid. It's frustrating being a Cocoa noobie after 30 years of scientific programming, but I'm doing my best to learn. I'm working on an application that displays a diagram I have drawn in a custom view to represent data input by the user. I'd like to print that diagram plus the input values. I've read explanations and examples in Apple's documentation, my library of Cocoa books, and from web searches. Each explains only how to print either a view graphics or a view containing text by instantiating an offscreen instance of that single view and redrawing its contents for printing. Unfortunately, none of them shows how to print two views containing different contents. Can the offscreen view contain subviews that each know how to draw themselves? Thank you in advance for your help. Unless I run into a problem, I won't respond here so I don't decrease the signal to noise ratio of this list. Scott ___ 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
NS_BUILD_32_LIKE_64
When I define NS_BUILD_32_LIKE_64=1 I can simply write: NSUInteger u = 12; NSLog(@u = %lu, u ); Otherwise I would need to use a cast like: NSLog(@u = %lu, (unsigned long)u ); or even more clumsy: #if __LP64__ NSLog(@u = %lu, u ); #else NSLog(@u = %u, u ); #endif The 64-Bit Transition Guide for Cocoa just says: The NS_BUILD_32_LIKE_64 macro is useful when binary compatibility is not a concern, such as when building an application. So: why is this NS_BUILD_32_LIKE_64 not always defined (as default) and what binary compatibility issues I have to be aware of? Kind regards, Gerriet. ___ 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: NS_BUILD_32_LIKE_64
If it's only NSLog formatting that's an issue, a trick we use for cross-platform printfs is a conditional macro (this is off the top of my head; ours is conditional on Windows or Mac/Linux): #if __LP64__ #define FMT_NSUInt %lu #else #define FMT_NSUInt %u #endif NSLog(@u = FMT_NSUInt etc, u); - Original Message - From: Gerriet M. Denkmann gerr...@mdenkmann.de To: cocoa-dev@lists.apple.com Sent: Saturday, June 11, 2011 12:54:39 AM Subject: NS_BUILD_32_LIKE_64 When I define NS_BUILD_32_LIKE_64=1 I can simply write: NSUInteger u = 12; NSLog(@u = %lu, u ); Otherwise I would need to use a cast like: NSLog(@u = %lu, (unsigned long)u ); or even more clumsy: #if __LP64__ NSLog(@u = %lu, u ); #else NSLog(@u = %u, u ); #endif The 64-Bit Transition Guide for Cocoa just says: The NS_BUILD_32_LIKE_64 macro is useful when binary compatibility is not a concern, such as when building an application. So: why is this NS_BUILD_32_LIKE_64 not always defined (as default) and what binary compatibility issues I have to be aware of? Kind regards, Gerriet. ___ 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/lrucker%40vmware.com This email sent to lruc...@vmware.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: NS_BUILD_32_LIKE_64
On Jun 11, 2011, at 00:54, Gerriet M. Denkmann wrote: The 64-Bit Transition Guide for Cocoa just says: The NS_BUILD_32_LIKE_64 macro is useful when binary compatibility is not a concern, such as when building an application. So: why is this NS_BUILD_32_LIKE_64 not always defined (as default) and what binary compatibility issues I have to be aware of? AFAIK there are 2 possible points of incompatibility: (a) libraries and (b) plugins. I can't think of an ABI reason why C or Objective-C code should be incompatible (across library/plugin boundaries where this macro had different values during compilation), but there may be some obscure cases where an incompatibility exists. For example, it might be that int and long have different structure alignment implications in certain architectures, even if they're the same size. It's also possible that Objective-C runtime things will break if they depend on @encode-style representations of types. However, the compilers are very cavalier with the @encode types, and at least in 64-bit compilations @encode types really only tell you sizes, not C types. Of course, C++ or Objective-C++ code is going to be incompatible, because of name mangling. ___ 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: NSInputStream created from NSData - expected it to close at end of data, did not happen
Am 11.06.2011 um 03:19 schrieb Jens Alfke: On Jun 10, 2011, at 5:35 PM, jodischla...@gmx.de wrote: I want the TCPServer to return some data block to each client that connects. I basically just want to put the bytes of the NSData object one after another on the outputstream that is connected to the socket. Problem: I would have to save the position in the data for each client to return the correct bytes to the client. At that point I thought that's what streams are for. To save your current position in a blob of bytes that should be read in order. Oh, so the input stream is on the server side? I didn’t realize that. Each client connection handler makes a stream of the data, then checks how much room is available to write to the client, reads that many from that stream and writes them to the client socket? Yes, exactly. :-) The simplicity is already gone, so I would be happy to try another way to test the implementation as well. But I can't think of one Well, you could write this server in about five lines of Ruby or Python*. I think one of the networking examples in the Ruby “pickaxe” book** is a server that just sends the current time (as a line of ASCII) to any client that connects. Hm, that might be a good idea. As long as I can be sure that the stream is then closed after the data has been sent. But how difficult would it be to configure this kind of server-script from inside a SenTestCase? At the moment I create different blocks of data in different SenTestCases, create a DataStreamingServer for that data, tell the client to connect to the server and let the run loop run for a second. I don't have any experience with Python or Ruby yet (and not too much with the icky PHP ^^). In what way would I give the data to the script? At the moment I'm thinking about a command line style script that I would execute from the test (which doesn't sound nice) and wondering about how to hand the data object over to the script. But there is also a Python/Ruby Bridge, isn't there? I don't have experience with such bridges either. Could you then somehow mix Objective-C and Python code? Joachim___ 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: NSInputStream created from NSData - expected it to close at end of data, did not happen
Am 11.06.2011 um 05:01 schrieb Ken Thomases: On Jun 10, 2011, at 7:35 PM, jodischla...@gmx.de wrote: I want the TCPServer to return some data block to each client that connects. I basically just want to put the bytes of the NSData object one after another on the outputstream that is connected to the socket. Problem: I would have to save the position in the data for each client to return the correct bytes to the client. At that point I thought that's what streams are for. To save your current position in a blob of bytes that should be read in order. Solution: Create a new NSInputStream (independent from the input stream of the TCPServer. That's why I talked about the data input stream, the input stream that reads the bytes of the data object) for each incoming connection. Guessing that after the NSInputStream based on the data is open it won't have any problems reading the data I only wait for the output stream to have space available and whenever it has I read some bytes from the data input stream and write them on the server output stream. I completely ignore the server input stream (except for logging the received data, when searching for bugs). When the client can accept data, you can just read from the input stream. If you get a zero-length read, then the input stream is exhausted. You may not get an event for that. Yes that's my problem. And that's why I close the stream now as soon as it does not have any more bytes available. In fact, the input stream need not be scheduled on a run loop and, if it's not, the delegate won't get any calls. But I did schedule it in a run loop and I do get NSStreamEventOpenCompleted and NSStreamEventHasBytesAvailable. I just don't get and NSStreamEventEndEncountered. Which would not be a big problem for the datastream. But: The events and the delegate are for asynchronous events in the stream, and there are none for a stream based on a data object. I also have the streams connected to the TCP-connection. When I close the datastream (and I checked with the debugger, that I actually do) I also close the output stream of the TCP connection on the server side. At that point I would expect the input stream connected to the socket on the client side to be closed as well. I don't know whether it is closed at that point, but at least I do not get an NSStreamEventEndEncountered event on the client side. And I can't think of a reason for that. The TCP connection of the client and server is local (127.0.0.1 as host address for the client, with some 3 port) and the data transfer seems to work, I checked with the debugger, that I get the bytes I expect to receive. The only thing that is missing is the NSStreamEvenEndEncountered. That's why I think the problem is either stream related or related to my (wrong?) understanding of streams. Best regards, Joachim ___ 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
visibleRect returns bogus results, why?
Hi,
I have a view with view controller. The controller receives scroll changes.
visibleRect returns bogus, so I tracked it with NSLog and confirmed this.
I use this code:
NSRect theRect = [[self view] visibleRect];
NSLog(@%@,NSStringFromRect(theRect));
When I scroll using the scrollwheel or arrows of the scrollbar, it looks good
2011-06-11 14:34:06.089 App[20913:903] {{0, 0}, {10, 344}
When I click onto the dot inside the scrollbar and drag it to another position,
it turns to bogus:
2011-06-11 14:34:09.108 App[20913:903] {{0, 1.21354e+09}, {10, 344}}
I also tried:
NSRect theRect = [[[self view] enclosingScrollView] documentVisibleRect];
Same result. Why
Thanks
Alex
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Solved: visibleRect returns bogus results, why?
Never mind, what works reliably is:
NSRect theRect = [[[self view] enclosingScrollView] visibleRect];
Am 11.06.2011 um 14:39 schrieb Alexander Reichstadt:
Hi,
I have a view with view controller. The controller receives scroll changes.
visibleRect returns bogus, so I tracked it with NSLog and confirmed this.
I use this code:
NSRect theRect = [[self view] visibleRect];
NSLog(@%@,NSStringFromRect(theRect));
When I scroll using the scrollwheel or arrows of the scrollbar, it looks good
2011-06-11 14:34:06.089 App[20913:903] {{0, 0}, {10, 344}
When I click onto the dot inside the scrollbar and drag it to another
position, it turns to bogus:
2011-06-11 14:34:09.108 App[20913:903] {{0, 1.21354e+09}, {10, 344}}
I also tried:
NSRect theRect = [[[self view] enclosingScrollView] documentVisibleRect];
Same result. Why
Thanks
Alex
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Re: Solved: visibleRect returns bogus results, why?
No, it's not solved. This works, because it always gives me the same rectangle.
As far as I can see this call is broken. As soon as a user drags the scrollbar
freely, the numbers go all bunkers as if the visible rectangle had an origin
which was a hundred miles down the screen. As a result rowsInRect for tableview
doesn't work neither and returns also useless results. Stupid. Is this normal
and a known bug, or am I missing something?
Am 11.06.2011 um 14:49 schrieb Alexander Reichstadt:
Never mind, what works reliably is:
NSRect theRect = [[[self view] enclosingScrollView] visibleRect];
Am 11.06.2011 um 14:39 schrieb Alexander Reichstadt:
Hi,
I have a view with view controller. The controller receives scroll changes.
visibleRect returns bogus, so I tracked it with NSLog and confirmed this.
I use this code:
NSRect theRect = [[self view] visibleRect];
NSLog(@%@,NSStringFromRect(theRect));
When I scroll using the scrollwheel or arrows of the scrollbar, it looks good
2011-06-11 14:34:06.089 App[20913:903] {{0, 0}, {10, 344}
When I click onto the dot inside the scrollbar and drag it to another
position, it turns to bogus:
2011-06-11 14:34:09.108 App[20913:903] {{0, 1.21354e+09}, {10, 344}}
I also tried:
NSRect theRect = [[[self view] enclosingScrollView] documentVisibleRect];
Same result. Why
Thanks
Alex
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Close: Solved: visibleRect returns bogus results, why?
My bad, I made an NSInteger into an NSUInteger the wrong way hence returning an
amount of rows for an NSTableview that was incorrect, so the tableview really
grew to that size.
Am 11.06.2011 um 15:03 schrieb Alexander Reichstadt:
No, it's not solved. This works, because it always gives me the same
rectangle. As far as I can see this call is broken. As soon as a user drags
the scrollbar freely, the numbers go all bunkers as if the visible rectangle
had an origin which was a hundred miles down the screen. As a result
rowsInRect for tableview doesn't work neither and returns also useless
results. Stupid. Is this normal and a known bug, or am I missing something?
Am 11.06.2011 um 14:49 schrieb Alexander Reichstadt:
Never mind, what works reliably is:
NSRect theRect = [[[self view] enclosingScrollView] visibleRect];
Am 11.06.2011 um 14:39 schrieb Alexander Reichstadt:
Hi,
I have a view with view controller. The controller receives scroll changes.
visibleRect returns bogus, so I tracked it with NSLog and confirmed this.
I use this code:
NSRect theRect = [[self view] visibleRect];
NSLog(@%@,NSStringFromRect(theRect));
When I scroll using the scrollwheel or arrows of the scrollbar, it looks
good
2011-06-11 14:34:06.089 App[20913:903] {{0, 0}, {10, 344}
When I click onto the dot inside the scrollbar and drag it to another
position, it turns to bogus:
2011-06-11 14:34:09.108 App[20913:903] {{0, 1.21354e+09}, {10, 344}}
I also tried:
NSRect theRect = [[[self view] enclosingScrollView] documentVisibleRect];
Same result. Why
Thanks
Alex
___
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Mac OS Leopard: how to spawn an child application?
Hi In Mac OS 10.6 (Snow Leopard) it is pretty simple to launch another application from within my application (in a way that my application becomes a parent process to the child) - i either may call [NSTask launchTask], or call fork()/exec() - either way, my process and the launched process-application are related by parent-child (and i can use pipes or socketpair for them to communicate). In Mac OS 10.5 (Leopard) launching a process is simple as well, unless this process is an Application (a bundle, that is supposed to have an icon in dock). If i start it with NSTask, i get Application not responding icon in dock (but the application works fine, only this behvior in Dock is very irritating). I suppose this is happening because usually start of an application is supposed to be performed by LaunchServices (my app has to delegate this job to LS, and therefore my process is not a parent of this newly spawned process). Is there any way to remain a parent of a just launched application? I know that Mac OS 10.5 Leopard is deprecated, but i can't help it - my boss wants Leopard support. Thank you! ___ 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: Mac OS Leopard: how to spawn an child application?
On Jun 11, 2011, at 10:32 AM, Nick wrote: In Mac OS 10.6 (Snow Leopard) it is pretty simple to launch another application from within my application (in a way that my application becomes a parent process to the child) - i either may call [NSTask launchTask], or call fork()/exec() - either way, my process and the launched process-application are related by parent-child (and i can use pipes or socketpair for them to communicate). In Mac OS 10.5 (Leopard) launching a process is simple as well, unless this process is an Application (a bundle, that is supposed to have an icon in dock). If i start it with NSTask, i get Application not responding icon in dock (but the application works fine, only this behvior in Dock is very irritating). I suppose this is happening because usually start of an application is supposed to be performed by LaunchServices (my app has to delegate this job to LS, and therefore my process is not a parent of this newly spawned process). Is there any way to remain a parent of a just launched application? Why do you care if it's the parent? What feature(s) of the parent-child relationship is (are) important? Maybe what you're trying to achieve can be accomplished in some other manner while still using NSWorkspace or Launch Services to launch the application (which is the right way). If it's just inter-process communication, there are other options. For example, use Bonjour for the parent to advertise its service and for the child to find and connect to it. Or use Unix domain sockets with a path that is known to both. Using Launch Services, you can pass an Apple Event descriptor with additional parameter information, which the child can retrieve. (The methods of NSWorkspace claim to support this, but I've found them to be buggy in this regard.) Etc. Regards, Ken ___ 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: Mac OS Leopard: how to spawn an child application?
Ken, i have an agent and a corresponding per-agent process (this per-agent process, apart from doing its main job and displaying gui when its clicked, displays an icon in dock which can change colors). Of course, the agent is spawned for every logged in user. I found parent-child connected (socketpair) sockets/pipes to be the easiest way to set up a conversation between an agent and that peruser application in Dock. And in Snow Leopard it works. This per user idea does not let me use any advertisement-based IPCs (like user domain sockets or bonjour). I need some per user only IPC - so other user's instance of the process does not interfere with the current user's one. I've heard that Mach Ports can be set to be seen only in the current login session (i.e., by current user's apps), but search led me to conclusion this is rather a messy/few documented (for usermode applications) topic and it behaves differently for Leopard and Snow Leopard due to some changes in bootstrap context 2011/6/11 Ken Thomases k...@codeweavers.com On Jun 11, 2011, at 10:32 AM, Nick wrote: Why do you care if it's the parent? What feature(s) of the parent-child relationship is (are) important? Maybe what you're trying to achieve can be accomplished in some other manner while still using NSWorkspace or Launch Services to launch the application (which is the right way). If it's just inter-process communication, there are other options. For example, use Bonjour for the parent to advertise its service and for the child to find and connect to it. Or use Unix domain sockets with a path that is known to both. Using Launch Services, you can pass an Apple Event descriptor with additional parameter information, which the child can retrieve. (The methods of NSWorkspace claim to support this, but I've found them to be buggy in this regard.) Etc. Regards, Ken ___ 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: Mac OS Leopard: how to spawn an child application?
On Sat, Jun 11, 2011 at 9:59 AM, Nick eveningn...@gmail.com wrote: I found parent-child connected (socketpair) sockets/pipes to be the easiest way to set up a conversation between an agent and that peruser application in Dock. And in Snow Leopard it works. Okay, it makes one thing easy (IPC) and another thing harder (making your app actually function). :) This per user idea does not let me use any advertisement-based IPCs (like user domain sockets or bonjour ). I need some per user only IPC - so other user's instance of the process does not interfere with the current user's one. I've heard that Mach Ports can be set to be seen only in the current login session (i.e., by current user's apps), but search led me to conclusion this is rather a messy/few documented (for usermode applications) topic and it behaves differently for Leopard and Snow Leopard due to some changes in bootstrap context The per-user bootstrap namespace has existed since Leopard. http://developer.apple.com/library/mac/#technotes/tn2005/tn2083%23SECNAMESPACEHIERARCHY Granted, using Mach facilities directly is considered bad form by Apple, but I'd suggest experimenting with configuring your launchd plist and using NSConnection to set up DO. But if anyone knows of any gremlins, it would be helpful to mention them. --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: Mac OS Leopard: how to spawn an child application?
On Jun 11, 2011, at 11:59 AM, Nick wrote: i have an agent and a corresponding per-agent process (this per-agent process, apart from doing its main job and displaying gui when its clicked, displays an icon in dock which can change colors). Of course, the agent is spawned for every logged in user. You should consider reversing the relationship between the agent and the GUI app. Consider making your agent a launchd agent, which is launched on demand whenever the GUI app requests its services (or when some other launchd-supported event occurs). To the GUI app, it appears as though the agent is always available. I found parent-child connected (socketpair) sockets/pipes to be the easiest way to set up a conversation between an agent and that peruser application in Dock. And in Snow Leopard it works. If it works in Snow Leopard, it's by accident and likely to fail in configurations you haven't thought to test or in future OS releases. You should be using Launch Services to launch applications. This per user idea does not let me use any advertisement-based IPCs (like user domain sockets or bonjour). Unix domain sockets can be in user-specific locations within the file system, like the temporary directory. I need some per user only IPC - so other user's instance of the process does not interfere with the current user's one. I've heard that Mach Ports can be set to be seen only in the current login session (i.e., by current user's apps), but search led me to conclusion this is rather a messy/few documented (for usermode applications) topic and it behaves differently for Leopard and Snow Leopard due to some changes in bootstrap context You don't have to use raw Mach ports. You can use CFMessagePort or NSMachPort. If you're thinking of TN2083 http://developer.apple.com/library/mac/#technotes/tn2083/, there are recommendations against Mach-port-based APIs but they're only in regards to daemons, not agents, precisely because daemons are non-user-specific. For agents, they are appropriate. (See the IMPORTANT note just above the Mach Considered Harmful section.) You should consider Distributed Objects, or at least the techniques it uses with NSConnection and NSPort-derived objects. See the Distributed Objects Programming Topics http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DistrObjects/DistrObjects.html. If you aren't comfortable using it for the bulk of your IPC, maybe it will just be useful to exchange the name of a Unix domain socket between the server and the client. Regards, Ken ___ 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: Mac OS Leopard: how to spawn an child application?
Nick wrote: This per user idea does not let me use any advertisement-based IPCs (like user domain sockets or bonjour). I need some per user only IPC - so other user's instance of the process does not interfere with the current user's one. A Unix domain socket can be placed anywhere in the file-system, AFAIK. So put it in the user's home directory, probably best in a sub-dir like ~/Library/Application Support/YourAppNameHere/. A location under user's home dir also ensures that access permissions are applied when addressing the socket. The name need not be advertised if both parties already know its pathname. http://en.wikipedia.org/wiki/Unix_domain_socket UNIX domain sockets use the file system as address name space. Also, Bonjour service type names may incorporate unique identifiers. For example, the user-name or user id, or a GUID known to both parties. (Obey limits on service type name length, and consider vulnerability to spoofing attacks.) -- 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
Why Wasn't Memory Collected?
Dear all,
I sent a large number, e.g., 200,000, of XML to a remote node. Each time,
the XML was created by the following method. Because of the large number, I
noticed the consumed memory was large (more then 1G!) from Activity Monitor.
Even after the sending was done, the memory was still kept in a high degree
without any decreasing.
However, the method below should be able to collect the consumed memory,
right? Why wasn't memory collected?
I appreciate so much for your help!
Best regards,
Bing
+ (const char *)createSendMessage:(NSString *)sourcePeerKey SPN:(NSString
*)sourcePeerName DPK:(NSString *)destinationPeerKey DPN:(NSString
*)destinationPeerName MSG:(NSString *)message
{
NSXMLElement *root = [NSXMLNode elementWithName:@MessageRoot];
NSXMLDocument *xmlDoc = [[NSXMLDocument alloc]
initWithRootElement:root];
[xmlDoc setVersion:@1.0];
[xmlDoc setCharacterEncoding:@UTF-8];
NSXMLElement *messageKeyElement = [NSXMLNode elementWithName:@
MessageKey];
[root addChild:messageKeyElement];
[messageKeyElement addChild:[NSXMLNode
textWithStringValue:[Utilities createUniqueKey]]];
NSXMLElement *commandElement = [NSXMLNode elementWithName:@
Command];
[root addChild:commandElement];
[commandElement addChild:[NSXMLNode textWithStringValue:@
SendMessage]];
NSXMLElement *sourcePeerKeyElement = [NSXMLNode elementWithName:@
SOURCE_PEER_KEY];
[root addChild:sourcePeerKeyElement];
[sourcePeerKeyElement addChild:[NSXMLNode
textWithStringValue:sourcePeerKey]];
NSXMLElement *sourcePeerNameElement = [NSXMLNode elementWithName:@
XML.SOURCE_PEER_NAME];
[root addChild:sourcePeerNameElement];
[sourcePeerNameElement addChild:[NSXMLNode
textWithStringValue:sourcePeerName]];
NSXMLElement *destinationPeerKeyElement = [NSXMLNode
elementWithName:@XML.DESTINATION_PEER_KEY];
[root addChild:destinationPeerKeyElement];
[destinationPeerKeyElement addChild:[NSXMLNode
textWithStringValue:destinationPeerKey]];
NSXMLElement *destinationPeerNameElement = [NSXMLNode
elementWithName:@XML.DESTINATION_PEER_NAME];
[root addChild:destinationPeerNameElement];
[destinationPeerNameElement addChild:[NSXMLNode
textWithStringValue:destinationPeerName]];
NSXMLElement *messageElement = [NSXMLNode elementWithName:@
XML.MESSAGE];
[root addChild:messageElement];
[messageElement addChild:[NSXMLNode textWithStringValue:message]];
NSData *data = [xmlDoc XMLData];
NSString *xmlStr = [[[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding] autorelease];
xmlStr = [xmlStr stringByAppendingString:@\n];
const char *xmlChar = [xmlStr UTF8String];
[xmlDoc release];
return xmlChar;
}
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Re: Mac OS Leopard: how to spawn an child application?
Thank you. I am sorry, I should have tested how it behaves with ordinary applications before. I just realized that I was wrong about the source of the issue i am having. [NSTask launchTaskForPath] works perfectly on both systems, for both GUI (bundled .app) and command line applications - it works, because we are able to start an application from a Terminal (and terminal fork()/exec() 's the binary). So, [NSTask] works, unless we decide to call it from a spawned-by-launchd application (i.e, an agent). When I do this, an application appears to be spawned in a different boostrap context (or something like that). Due to some change in bootstrap spaces, an agent can spawn ordinary-user's processes without any side effects in Snow Leopard - Apple moved everything related to a user into one bootstrap space (in contrary to several pink rectangles that are shown in the Daemons Agents technote). But not in Leopard. The only option i have, i guess, is to ask Launch Services (or NSWorkspace) to launch my app, as suggested. 2011/6/11 Greg Guerin glgue...@amug.org Nick wrote: This per user idea does not let me use any advertisement-based IPCs (like user domain sockets or bonjour ). I need some per user only IPC - so other user's instance of the process does not interfere with the current user's one. A Unix domain socket can be placed anywhere in the file-system, AFAIK. So put it in the user's home directory, probably best in a sub-dir like ~/Library/Application Support/YourAppNameHere/. A location under user's home dir also ensures that access permissions are applied when addressing the socket. The name need not be advertised if both parties already know its pathname. http://en.wikipedia.org/wiki/Unix_domain_socket UNIX domain sockets use the file system as address name space. Also, Bonjour service type names may incorporate unique identifiers. For example, the user-name or user id, or a GUID known to both parties. (Obey limits on service type name length, and consider vulnerability to spoofing attacks.) -- 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/eveningnick%40gmail.com This email sent to eveningn...@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: Why Wasn't Memory Collected?
On Jun 11, 2011, at 12:03 PM, Bing Li wrote: Dear all, I sent a large number, e.g., 200,000, of XML to a remote node. Each time, the XML was created by the following method. Because of the large number, I noticed the consumed memory was large (more then 1G!) from Activity Monitor. Even after the sending was done, the memory was still kept in a high degree without any decreasing. However, the method below should be able to collect the consumed memory, right? Not always. Why wasn't memory collected? If you're not using GC, and you're creating a lot of temporary objects in a loop, then you'll need to manually create and drain an autorelease pool inside that loop while being careful not to delete objects you don't want to delete. I find that it helps to use Instruments' object allocation tool, and watch for places where memory usage increases and then suddenly falls off. Those are the places where you need to set inline pools. If you're using GC, then this will not be a problem, although if you create and drain an autorelease pool anyway, draining the pool will force the collector to begin if it hasn't already. Nick Zitzmann http://www.chronosnet.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
Getting CGColor components
According to all the examples I have found the following code should give me
the RGB components of any UIColor.CGColor I pass to it
However I get back a scrambled and often inaccurate array of color values which
turns out to be useless.
CGFloat colors[[widgetArray count]*4];
id * item;
int idx=0;
for (item in widgetArray) {
const CGFloat *comp =
CGColorGetComponents(item.backgroundColor.CGColor);
const CGFloat *c = CGColorGetComponents(item.backgroundColor.CGColor);
colors[idx] = comp[0];
colors[++idx] = comp[1];
colors[++idx] = comp[2];
colors[++idx] =
c[CGColorGetNumberOfComponents(item.backgroundColor.CGColor)-1];
idx++;
}___
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Re: Getting CGColor components
:\
I think I have it figured out
All colors work except white and black.
I had to detect those and build the rgb manually
On Jun 11, 2011, at 4:12 PM, Development wrote:
According to all the examples I have found the following code should give me
the RGB components of any UIColor.CGColor I pass to it
However I get back a scrambled and often inaccurate array of color values
which turns out to be useless.
CGFloat colors[[widgetArray count]*4];
id * item;
int idx=0;
for (item in widgetArray) {
const CGFloat *comp =
CGColorGetComponents(item.backgroundColor.CGColor);
const CGFloat *c = CGColorGetComponents(item.backgroundColor.CGColor);
colors[idx] = comp[0];
colors[++idx] = comp[1];
colors[++idx] = comp[2];
colors[++idx] =
c[CGColorGetNumberOfComponents(item.backgroundColor.CGColor)-1];
idx++;
}___
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Re: iOS: encoding a custom view with a shape in it
How do the results differ between what you saw before and after saving the document? Is everything wrong? or just the scaling, the rotation, what? And to draw an object, are you using an affine transform just to rotate it or for scaling and/or translation as well? On Jun 9, 2011, at 4:25 PM, Development wrote: This app allows users to do a number of graphical things. On of those things is to draw rectangles and ellipses. No it would not be complete if they could not resize and rotate these shapes. Thus the features exist. The problem comes when I freeze dry the object. I encode it exactly as it exists at the moment the saveDocument: option is invoked. colors, frame,rotation etc logging these values confirms them When I unfreeze it, well the values remain identical. hence I know the save worked. I initialize the object with the decoded rectangle for the frame I then apply the transition to rotate it to the correct angle. hmm the result looks nothing like the initial item did at save time So I've been looking at this very closely... Is this happening because simply applying the last known frame and angle does not mean it will match? If this is the case, does it mean then that in order to preserve the exact state, I must not only save all the data about the object but an array of every change made to the object such as resizes and rotations in order to get the correct result? My bandaid is to convert the view in to a UIImage and save the image. This fixes the problem however the downside is that special effects that can be applied to rectangles and ellipses are not available on reload. ___ 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: iOS: encoding a custom view with a shape in it
And also to clarify, are you freeze drying a view or the objects it draws? You should be doing the latter since that's part of your model. On Jun 11, 2011, at 6:47 PM, Steve Christensen wrote: How do the results differ between what you saw before and after saving the document? Is everything wrong? or just the scaling, the rotation, what? And to draw an object, are you using an affine transform just to rotate it or for scaling and/or translation as well? On Jun 9, 2011, at 4:25 PM, Development wrote: This app allows users to do a number of graphical things. On of those things is to draw rectangles and ellipses. No it would not be complete if they could not resize and rotate these shapes. Thus the features exist. The problem comes when I freeze dry the object. I encode it exactly as it exists at the moment the saveDocument: option is invoked. colors, frame,rotation etc logging these values confirms them When I unfreeze it, well the values remain identical. hence I know the save worked. I initialize the object with the decoded rectangle for the frame I then apply the transition to rotate it to the correct angle. hmm the result looks nothing like the initial item did at save time So I've been looking at this very closely... Is this happening because simply applying the last known frame and angle does not mean it will match? If this is the case, does it mean then that in order to preserve the exact state, I must not only save all the data about the object but an array of every change made to the object such as resizes and rotations in order to get the correct result? My bandaid is to convert the view in to a UIImage and save the image. This fixes the problem however the downside is that special effects that can be applied to rectangles and ellipses are not available on reload. ___ 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: Printing graphics plus text
On Jun 10, 2011, at 11:58 PM, Scott Steinman wrote: Please forgive me if my question is stupid. It's frustrating being a Cocoa noobie after 30 years of scientific programming, but I'm doing my best to learn. I'm working on an application that displays a diagram I have drawn in a custom view to represent data input by the user. I'd like to print that diagram plus the input values. I've read explanations and examples in Apple's documentation, my library of Cocoa books, and from web searches. Each explains only how to print either a view graphics or a view containing text by instantiating an offscreen instance of that single view and redrawing its contents for printing. Unfortunately, none of them shows how to print two views containing different contents. Can the offscreen view contain subviews that each know how to draw themselves? Thank you in advance for your help. Unless I run into a problem, I won't respond here so I don't decrease the signal to noise ratio of this list. Scott, Yes, the common way would be to create a superview, with multiple subviews (ie, with the diagram view and a view with the text values, laid out how you want them to print), then print the superview. Another method some people use to print is to use a WebView, as you can just generate very basic html (including graphics), and then use CSS to format/arrange it properly. Eli ___ 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
layoutSubviews doesn't always work (iOS 4.3 on iPad Simulator)
Hi All,
I have an app that consists of a scroll view subclass which contains a single
subview. In the scroll view subclass I override layoutSubviews based on Apple
sample code (see below). The intention of layoutSubviews is to centre the
subview in the scrollview when the subview is smaller than the scrollview's
display area.
There are three circumstances where the layoutSubviews is called but in one of
them the visual results are incorrect.
If I pinch to zoom, the layout looks correct.
scrollViewDidEndZooming:withView:forScaleL contains a single line of code that
calls rescaleTo:animated:
[ rescaleTo: myScale * scale animated: NO ];
If I change the frame of the subview, the layout looks correct.
This is called automatically by the framework because I have called
setNeedsLayout when I resized the subview.
If I attempt to reset the zoom to scale = 1, the layout is not centred if the
view was bigger than the display area prior to attempting the rescale.
This is done by calling rescaleTo:animated: directly.
[ rescaleTo: 1.0 animated: YES ];
The animated: parameter only affects the contents of the subview and setting it
to NO for all calls to this method doesn't change the results.
When I trace through layoutSubviews, the input (self.bounds.size and
myCurrentView.frame) and output (frameToCentre) values are the same in all
three cases, but only in the third does it not centre properly. Note that the
subview does change position, though.
Here is the code for layoutSubviews:
- (void)layoutSubviews
{
[super layoutSubviews];
// center the image as it becomes smaller than the size of the screen
CGSize boundsSize = self.bounds.size; // 1024 x 704
CGRect frameToCenter = myCurrentView.frame; // 240 x 100 @ ( 0, 0 )
// center horizontally
if( frameToCenter.size.width boundsSize.width )
frameToCenter.origin.x = ( boundsSize.width - frameToCenter.size.width
) / 2;
else
frameToCenter.origin.x = 0;
// center vertically
if( frameToCenter.size.height boundsSize.height )
frameToCenter.origin.y = ( boundsSize.height -
frameToCenter.size.height ) / 2;
else
frameToCenter.origin.y = 0;
myCurrentView.frame = frameToCenter; // 240 x 100 @ ( 392, 302 )
}
Any ideas where I should look or what might be causing the behaviour?
Thanks,
Brian.___
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Re: tools for writing help books
I've been using iWeb together with this link: http://www.ehow.com/how_7515811_do-add-xcode-project.html Martin On 10, Jun, 2011, at 01:14 AM, Matt Neuburg wrote: On Wed, 08 Jun 2011 09:33:50 +0200, Michael Thon m...@michaelrthon.com said: What tools to y'all recommend for writing content for the help viewer on Mac OS? Do you write them directly in html/xhtml? Yeah, I rolled my own, RubyFrontier: http://www.apeth.com/RubyFrontierDocs/ I've written some very extensive help viewer app documentation with it, plus I use it to maintain all my Web sites, so clearly I think it's a powerful and flexible tool; on the other hand it's kind of quirky in that it's modeled after UserLand Frontier's website framework which is not everyone's cup of tea. However, it's free and open source, and it's Ruby so you get to use whatever cool Ruby tools you feel like. I write in kramdown and HAML and SASS and things like that, so I'm not doing much manual HTML. m. -- matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/ A fool + a tool + an autorelease pool = cool! Programming iOS 4! http://www.apeth.net/matt/default.html#iosbook___ 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/martin.hewitson%40aei.mpg.de This email sent to martin.hewit...@aei.mpg.de Martin Hewitson Albert-Einstein-Institut Max-Planck-Institut fuer Gravitationsphysik und Universitaet Hannover Callinstr. 38, 30167 Hannover, Germany Tel: +49-511-762-17121, Fax: +49-511-762-5861 E-Mail: martin.hewit...@aei.mpg.de WWW: http://www.aei.mpg.de/~hewitson ___ 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: Why Wasn't Memory Collected?
Dear Nick, I appreciate so much for your reply! I add a sub-autoreleasepool immediately outside the method that created XML. Once if the XML is sent, the memory should be released, right? Now the amount of memory consumed is very limited, almost no change in Activity Monitor. So I guess sub-autoreleasepool is important. We should not depend on the most high level autoreleasepool to collect memory. Am I right? Thanks, Bing On Sun, Jun 12, 2011 at 7:12 AM, Nick Zitzmann n...@chronosnet.com wrote: On Jun 11, 2011, at 12:03 PM, Bing Li wrote: Dear all, I sent a large number, e.g., 200,000, of XML to a remote node. Each time, the XML was created by the following method. Because of the large number, I noticed the consumed memory was large (more then 1G!) from Activity Monitor. Even after the sending was done, the memory was still kept in a high degree without any decreasing. However, the method below should be able to collect the consumed memory, right? Not always. Why wasn't memory collected? If you're not using GC, and you're creating a lot of temporary objects in a loop, then you'll need to manually create and drain an autorelease pool inside that loop while being careful not to delete objects you don't want to delete. I find that it helps to use Instruments' object allocation tool, and watch for places where memory usage increases and then suddenly falls off. Those are the places where you need to set inline pools. If you're using GC, then this will not be a problem, although if you create and drain an autorelease pool anyway, draining the pool will force the collector to begin if it hasn't already. Nick Zitzmann http://www.chronosnet.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: Why Wasn't Memory Collected?
On Jun 11, 2011, at 11:39 PM, Bing Li wrote: I add a sub-autoreleasepool immediately outside the method that created XML. Once if the XML is sent, the memory should be released, right? Now the amount of memory consumed is very limited, almost no change in Activity Monitor. So I guess sub-autoreleasepool is important. We should not depend on the most high level autoreleasepool to collect memory. Am I right? No, you can depend on it to collect memory, but you need to run your own pools if you need to create and get rid of large amounts of temporary objects. And you're going to need to use Instruments' object alloc instrument to figure out where your code is creating large amounts of temporary objects. Do not use Activity Monitor as a profiling tool. Nick Zitzmann http://www.chronosnet.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: Why Wasn't Memory Collected?
On Sat, Jun 11, 2011 at 1:03 PM, Bing Li lbl...@gmail.com wrote: NSData *data = [xmlDoc XMLData]; NSString *xmlStr = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease]; xmlStr = [xmlStr stringByAppendingString:@\n]; const char *xmlChar = [xmlStr UTF8String]; [xmlDoc release]; return xmlChar; } If you're using your own autorelease pools now, be careful about the lifetime of your return value (xmlChar)! It will only live as long as xmlStr lives. For example, this would be incorrect: NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; const char *str = [self createSendMessage:...]; [pool release]; // do something with str You'll want to strdup() the return value to make sure it lives after the pool is released, but then you also need to remember to free() your strdup() value. ___ 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
