Re: Threading synchronization: does a primitive exists?

/5/6 Graham Cox graham@bigpond.com: On 05/05/2011, at 11:51 PM, eveningnick eveningnick wrote: What i need - is to stop the thread A immediately after the thread B has been spawned by a thread A. Hang on. Why use a thread at all? If Thread A simply calls the process B synchronously

drawing onto CVPixelBuffer

Hi I have a CVPixelBuffer with some background picture. I need to draw on this background some foreground image. I don't need to preserve the initial CVPixelBuffer's content - i just need to add a small foreground watermark onto that buffer. CIImage does allow to create an image from

Re: Threading synchronization: does a primitive exists?

really really do not want to block the main thread anyway). On May 6, 2011, at 1:10 PM, eveningnick eveningnick wrote: I need to wait, while the image is drawn (drawRect method is actually called by the framework) from a different thread that supplies frames. I am drawing images just to see

Re: drawing onto CVPixelBuffer

the pixel format of the CVPixelBufferRef is k32BGRAPixelFormat ___ 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

Getting mouse cursor position

Hello I am searching for the way to find a cursor's position on the screen. I tried to use method -hotSpot of NSCursor, but it returns sc x=-2057825613, y=0 -(IBAction)timeHandler:(id)timer { //NSCursor *sc = [NSCursor currentSystemCursor]; NSCursor *sc = [NSCursor

Threading synchronization: does a primitive exists?

Hello I have a thread A that spawns a thread B, and should stop, waiting before the thread B allows thread A to continue. In Windows, in a thread A, before spawning a thread B, i would create a synchronization Event primitive in the non signaled mode, the spawn a thread B, and call

Re: Threading synchronization: does a primitive exists?

2011/5/5 Heath Borders heath.bord...@gmail.com: Try NSConditionLock. Its documentation should be pretty self-explanatory. Health, thanks for the response. However, i can't see how can i use NSConditionLock in my situation. For every lock (or mutex/semaphore - which essentially is the same) i

Re: Threading synchronization: does a primitive exists?

Ken, Thanks for a detailed response Still not sure how would it be possible to do using NSConditionLock, but i managed to do it using NSCondition :) 2011/5/5 Ken Thomases k...@codeweavers.com: On May 5, 2011, at 8:51 AM, eveningnick eveningnick wrote: 2011/5/5 Heath Borders heath.bord

what kind of pictures am i allowed to draw onto NSOpenGLView?

Hi I am trying to find a way to display a set of images serially on window. As far as i understood reading Apple programming guides (Core image, OpenGL) and samples, NSOpenGLView is the optimal choice for the task, since it offers asynchrony and delegates anything possible to the GPU. According

Multithreading and memory management question

Hello I have an application that has a shared object (which is a custom container for elements - arrays, and which is protected by critical sections in my code). I need to control it's lifetime - it should be alive until the last thread finishes working. Let me try to explain it using an example

Re: Multithreading and memory management question

Hi Ken, How are you spawning your threads? If you use Cocoa methods, then they automatically retain the object which is the target of the selector and the argument object for the life of the thread.  So, you may be getting this automatically without realizing it.  If not, then it should be

Re: A very customized window

Thanks a lot for detailed response! ___ 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

A very customized window

Hi Is it possible to resize a custom title-less window using any of it's 4 corners? I want to display a window with a hole inside (A window which looks like a frame), and let the user to resize this frame using any of the 4 boundaries of such a frame. Also i am wondering, if i could let the user

Re: A very customized window

While what you are asking for does not sound patently unreasonable, this last sentence should almost never be the reason to make a particular design decision, especially when it comes to deciding to implement non-standard controls, etc. Your statement made me think about redesigning some

Re: A very customized window

Hi Ken, first thank you for answering this question and previous times. I am just very unfamiliar about what can i do and what i can't drowning in documentation that's why i'm asking so many times. I managed to display the funky window, but the events were my problem. Thanks a lot for the links.

Display a Red frame on the screen

Hello I have two monitors attached to the computer, and when i click in System Preferences/Displays Preferences on the display image (Display arrangement tab), the screen of the clicked scematic monitor's image monitor is being surrounded by a red frame. How could i do something like this from my

Re: Display a Red frame on the screen

Hi David, thanks for the answer I was thinking about the window. But then it has to be something with a big hole inside. This hole ought to be transparent for mouse clicks (so if there's something below my window, that 'something' has to be clickable and focused, and receive keyboard input)? Is

Re: Display a Red frame on the screen

thanks andreas, i'll look at that ___ 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

Retrieve camera's parameters

Hi I am developing a QTKit application for capturing the camera's output, and i need to tell the user about what color modes and resolutions the camera supports natively. QTKit itself does not provide such a functionality - it sets up resolution automatically. I am wondering, if there is any way

Highlight a window of another application

hi i am writing a small screen video grabber and i would like to have an option there to grab only a particular window. This window may belong to another application, of course. I need to somehow impact a particular window for the user, make it bold, change it's shadow color or add some kind of a

Re: Fast way to grab the screen

Thank you for the answer So i guess OpenGL is a way to go. And with it, i have two problems: 1) how to select only a particular window to grab? Since im getting a framebuffer contents, i am having the whole screen picture. I need to cut out only a particular region of it - that contains a

Re: Highlight a window of another application

I need to somehow impact a particular window for the user, make it bold, change it's shadow color or add some kind of a frame around it - to remind the user that only this particular window is being 'grabbed'. Does WindowServer allow to perform such kind of operations on any level? What APIs

Fast way to grab the screen

Hello Which way is faster to get the picture of the desktop (or some of its windows): using CGWindow API or OpenGL? i am trying to write a video grabber, CGWindow API seems pretty convenient (because it allows to select which window to grab), but i am worried about the speed, because i need to

Reliable way to determine bitness of the kernel

hello i have a kext (or, rather, 2 kexts - one built with -arch i386, another one with -arch x86_64). They should work on both OS X 10.5 and 10.6. i have an installing script, which looks like if [ `uname -a | grep x86_64 | wc -l` ge 1 ]; then cp -R 64bit.kext /Library/Extensions/ else cp -R

Re: Reliable way to determine bitness of the kernel

thanks for detailed description of the solution ___ 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

Re: Execute a pre-starting script first, when the App bundle is launched, then the main executable

The one that comes to my mind immediately, is that if the user is double-clicking a document in the Finder to open it, or trying to print from the Finder, then the event for that goes to your script, not the real application. So the script would need to pass that on. Assuming your app

Change the NSPreferencePane window size programmatically

Hello is it possible to set up the System Preferences height programmatically? I have 3 possible NSViews of different height (but the same width), which are displayed depending on what current settings does the user have. I am aware that System Preferences automatically changes the size of its

Re: Change the NSPreferencePane window size programmatically

Kyle, thanks for the warning, i understand the problems it may cause. but what if i was doing that, how should have i sent a message to an object of the host application? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin

Re: execute system(some script) on behalf of root from non-root app

Search google is not an answer, although a good suggestion. Could you please post the solution you came up with to the list. There are many ways to skin this cat, I think we would all benefit from your experience. Every process that is running on a system has two user id numbers - effective UID

Re: execute system(some script) on behalf of root from non-root app

Executing arbitrary scripts as root is also a potentially major security hole.  Your goal should be to do as little as possible as root (or other elevated privileges), and with as little flexibility as possible. Security is hard, and if you don't understand the issues, you should take a

Execute a pre-starting script first, when the App bundle is launched, then the main executable

Hi I have an application, which is located in a bundle (like any other cocoa app) and can be installed in a mac-way: by dragging its bundle to /Applications (or elsewhere). I have been asked to create an addition to this application, that adds some functionality, but needs to be installed using

Re: Execute a pre-starting script first, when the App bundle is launched, then the main executable

You can't do this. The Info.plist needs to refer to the main app's binary. Instead, put your checks into the main app's startup code. -[NSApplicationDelegate applicationDidFinishLaunching:] would be a good place. This will require changes to the main app. What if i rename the Main

execute system(some script) on behalf of root from non-root app

Hello I am trying to write a simple uninstaller, that has to call few root-demanding actions - stopping/unloading daemon and unloading kext. I can do that from a script-uninstaller, like this: #!/bin/sh launchctl stop my.agent launctctl -w unload /Library/LaunchAgents/my.agent.plist sudo

Re: execute system(some script) on behalf of root from non-root app

Thanks Nick, i really should've googled before asking. ___ 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

Re: Application that uninstalls itself

Thanks everyone for advices! 2011/1/4 James Bucanek subscri...@gloaming.com: In my application, I have a special Uninstall and Quit menu item. I shutdown and delete launchd configuration files and them move the active components (plug-ins, helpers, ...) to the trash. I find this avoid the

Re: Close System Preferences programmatically

Hi Nick Thank you I've an unusual application that is mainly located in System Preferences (its gui part), and which can be uninstalled by clicking a button Uninstall in that prefpane better solution would be to programmatically press Show All button (back in System Preferences), but that seems

Re: Close System Preferences programmatically

- If you really want System Preferences to quit, you could use NSAppleScript and do something like: tell application System Preferences to quit You can do the same using AppleEvents. Peter, could you hint me on how to do it using AppleEvents? Googling, i have found some references to

Application that uninstalls itself

Hello I am writing an application that for users convenience has a button Uninstall. Inside, this uninstaller stops several launchd services, kextunloads a driver, deletes this driver and services and finally is supposed to delete itself. In any sane operating system it is impossible (at least,

Communicating to a process started by root from non-root app

Hello i have a daemon whose owner is wheel:root and which provides a Unix Domain Socket where i can send/receive datagrams from my custom Preference Pane. The problem i have is that a socket, installed by a root-process can't be sent by a non-root application, like System Preferences. I guess i

Re: Communicating to a process started by root from non-root app

Unless I'm forgetting something basic, you should be able to connect to your daemon's socket from a non-root process if you first change the permissions on the socket (using chmod, as if it were a file). The man page for the unix-domain protocol family alludes to this briefly: All

Re: PreferencePane: To use xxx System Preferences must quit and reopen (Snow Leo 10.6.3)

Thanks for the answers, i enabled Garbage collection, The problem was that i had Build for active platform checkbox checked, i unchecked it and it started working fine ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin

PreferencePane: To use xxx System Preferences must quit and reopen (Snow Leo 10.6.3)

Hello I am creating a system preferences applet (according to apple's guide), but after installing (copying) its bundle into /Library/PreferencePanes/, and clicking it (or selecting its icon in System Preferences app), i always get the message from the subj. My OS is running in 32 bit mode: $ arch

Re: PreferencePane: To use xxx System Preferences must quit and reopen (Snow Leo 10.6.3)

interesting thing is that it works, if the project is created as a Preference Pane, while the Bundle project (there is a recipe for creating preference panes using Bundle xcode template) doesn't work as needed. I matched two projects - one created as Bundle manually, and another one generated

Get current caret position

Hello I a wondering, if it is possible to get the current screen position of a text cursor (text caret) using Cocoa? It is possible to do that in Windows system (GetCaretPos), maybe Mac allows some similar functionality? Thanks! ___ Cocoa-dev mailing

Re: Get current caret position

The text caret doesn't have a single, global position. It is really the position of the text selection within an active text view when the selection length is zero. If you want to know which logical characters the insertion point is at in a given text view, that's easy to find - just get

Re: Get current caret position

Hi George, What you want to do would is within another's application. Any public hooks/APIs could be used... In this case VB and AppleScript. For deeper, Cocoa-based integration, you would probably need to work with Microsoft. Couldn't hurt to try contacting them... The means mentioned

What is Mac's custom for an agent to display its GUI?

Hello! I have to write an application, that should run on the background. When the user needs, it should display some control panel. On Windows system i would have used System tray, and an icon there - when the user clicks on that icon, it displays some GUI. but what is the Mac's usual practice? I

Launchd and terminal process launch - is there any difference from that process' viewpoint?

what is the difference between a process that was started by launchd and the same process, started via terminal (without sudo command) in Mac OS 10.5? Does the first one has some restrictions when it calls Accessibility functions? Here is the Preface to my problem. (i apologize that it is a

Re: Understanding the Run loop idea and the updating of controls during long operations

On 10.6 you can safely execute Apple scripts from a secondary thread (see previous thread on this matter). Well, I just checked this using an NSOperation object which executes a script. The operation can be alternatively executed on the main thread scheduled by the global queue [NSOperation

Re: Understanding the Run loop idea and the updating of controls during long operations

Hello Fritz You are understood: You want to learn how the high-level application and event API works by trying to recreate (or at least explain) it using lower-level API. You can't do it. At least not in general. To provide the high-level functionality, Apple uses the published low-level

Re: Launchd and terminal process launch - is there any difference from that process' viewpoint?

Hi Ken, thanks for the answer Does the first one has some restrictions when it calls Accessibility functions? It may, depending on the session type.  Have you set LimitLoadToSessionType in your agent's launchd plist? no, i haven't specified that This Launch Agent is supposed to be

Re: Understanding the Run loop idea and the updating of controls during long operations

Hello Ken If you don't have a handle on the basics, it's foolhardy to get into advanced techniques. I am trying to understand these techniques step by step, it is really difficult for me when everything is hidden :( I assume i should call a one run through the runloop manually, but how?

Re: Understanding the Run loop idea and the updating of controls during long operations

Hello Scott You seem to be trying to find ways to use the frameworks in ways that are not intended. Why are you not using NSApplicationMain in the normal way? Just for the sake of my own understanding. There's nothing extraordinary i am doing there, but for example, i need to delay the launch

Understanding the Run loop idea and the updating of controls during long operations

Hello I am trying to understand how does Run loop work. Here is my story (i am sorry, it is a little long, but to avoid questions why do you need that and others i thought better to write it down here). I also read the CFRunLoop documentation, and event processing guide in Cocoa, but I couldn't

Re: Writing an Uninstaller

Thank you guys, i have written an Applescript for all that. That is easy, and flexible :) And it can delete its own bundle, which is important for me ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator

Operating with a file /Library/LaunchAgents/my.application.plist from a non-root application

Hello How, using an ordinary application (started by doubleclicking from /Applications), i could create/modify/delete that file? Is it possible at all, according to OS X current security model? (Leopard and Snow Leopard) Maybe i could display a User login inbox somehow then, to let user authorise

Determine current mouse cursor position

Hello I need to implement a functionality like Microsoft Word does for popup windows - display a semi transparent popup window with the alpha value calculated by the distance from the mouse cursor to the edge of the window. It is a requirement for me, not just a decoration to look in a neat mac

Re: Determine current mouse cursor position

If you want the *current* mouse location at the time you decide to display the window, use +[NSEvent mouseLocation] or -[NSWindow mouseLocationOutsideOfEventStream]. However, it's more than possible that you should be using the mouse location *synchronized with the application's event

Re: Writing an Uninstaller

Thank you guys for answer, but the problem still remains for me HI ,   launch an applescript / shell script when uninstall button is clicked . This should first quit  the App and wait for it to terminate and then delete the bundle and plist Rajendran P I'm sorry for asking such a

Writing an Uninstaller

Hello I have an application that creats, when installed, a bundle in Applications and registers a .plist file for launchd in ~/Library/LaunchAgents (the agent is located in that bundle, and its process is launched everytime the OS starts). Thus, i can't let a user just to move bundle to the Trash

Few binaries in one application's Bundle

Hello My project consists of few binaries, and i wanted to put them into one application Bundle (thus, i placed them into ./Contents/MacOS/). Only one of these binaries is launched when the bundle is doubleclicked in finder (i have specified it in ExecutableFile in bundle's Info.plist file).

Re: Few binaries in one application's Bundle

Thanks Uli, it worked! ___ 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:

fork/exec vs NSTask

Hello! I am wondering, if NSTask can be replaced with low-level fork/exec calls. Looking through forums, i often met statements that launching a process with fork/exec is not an OS X way, especially if i am using Cocoa framework (and i am using Cocoa!). What i want to do - is to launch an

What alhorithm does the launcher follow while processing bundle?

Hello! What operations does the application launcher (or launch services? who's responsible for launching bundles) when i doubleclick on a bundle? What happens when i open a terminal and go (CD) straight through MyApp.app/Contents/MacOS and launch the binary? Is there some source to read about

Re: fork/exec vs NSTask

Are you sure about that? No, but by reading all the topics of people, who tried to launch a simple (non bundled) binary with it, i left that idea - according to gossips Launch Services act like Finder's doubleclick - if you doubleclick on a binary file, it just won't work. And unfortunately on

What causes CGEventTap to be automatically disabled?

Hello i have an application that installs several active event taps (active - those that can modify and filter events) into another application. I activate them (CGEventTapEnable) and deactivate them only when my app quits. In some moments i find out (using application ET Testbench) that my

Re: How to create secondary Thread that listens to event taps?

You create the secondary thread, install the event tap in it as usual - that is, create a run loop source for the tap and add the source to the current run loop returned by CFRunLoopGetCurrent() - and then, erhm, run the run loop in a loop :-) Something like (warning: typed in Eudora):  

How to create secondary Thread that listens to event taps?

I have an application that has to perform a long action and while performing it, be able to react to pressing Esc and cancel that long operation. That long action is a series of Applescript calls. If i perform these calls in NSOperation's -main function the speed significantly decreases - i guess

How does Popup menu receive keyboard events?

Hello I have some application active (for example, finder) and its window is a keyWindow that receives keyboard events After i click on a free from windows part of a desktop with right mouse button, i have a popup menu dropped down, and somehow this menu now gets keyboard events (for example, when

Re: Let the runloop process its queue during a long operation

2010/10/6 Dave Keck davek...@gmail.com: Can i make a runloop run only one time through the queue, and then return back to processing of that big file? See CFRunLoopRunInMode(), specifically the returnAfterSourceHandled argument. But this is for Carbon application, isn't it? I have a cocoa

Re: Let the runloop process its queue during a long operation

Actually, by processing i mean a lot of AppleScript calls, some of which return NSAppleEventDescriptors. I am not sure how it is happening under the hood (if someone could explain me...), but what i see is: i call NSAppleEventDescriptor *resultFromScript = [myapplescript executeAndReturnError];

Help to understand how do events work

Hello! I have created a cocoa application that has unusual behavior: it has a window (NSPanel), which does not activate the application, when it's clicked. This window is ordered always on top of the other windows. So it's like a tooltip window (basically it is a popup thing, that drops down when

Let the runloop process its queue during a long operation

Hello I have an application that transforms a very big file, and during that operation i want to give a chance to user to press Esc and cancel this transformation. Therefore i need to make mainRunLoop run inbetween some phases of the file transformation. There's an idea to create a separate

what are the scenarios for an app to be terminated?

Hello! What are all the scenarios for terminating the Cocoa application, and can i catch the moment of quitting and do some before quit actions? I am writing a naked cocoa application (basically for myself, to understand what happens under the hood). So, instead of calling NsApplicationMain, i do

Re: Help to understand how do events work

I'm sorry, i guess i have posted the messages privately before, thinking they are posted to a mailing list. I have used before only forums and don't have enough experience with mailing lists :) Hope this time the message will come to the right destination Hi Jonathan Unfortunately this doesn't

Is there any other way of enumerating windows and getting their positions except Accessibility API?

Hello Is there a way in MacOS X to determine the position of the control on a screen, if the application doesnt provide Accessibility object for that control? What am I trying to do - is to get the position of the topleft corner of Mac:Word Page (it seems to be a View or something like that).

Get an absolute screen pos of a text cursor in another Carbon application from Cocoa app

Hello! Is it possible to somehow determine the text caret's absolute screen position of a Carbon application? (I've sent it to carbon mailing list, but seems like no one is interested in carbon development anymore) What am i trying to do is to display a popup list window near the text cursor in

To make an application start everytime when another program starts

Hello! I have written an application, that interacts with another stranger-program by Applescript. The problem is that i need my application to look like a plugin for stranger program- to display a panel, and to be launched automatically when the Master-program starts (and to finish, when the

Applescript: force garbage collection? (NSAppleScript call from Cocoa app)

Hello I am trying to call applescript functions (from my cocoa application - using NSAppleScript's -executeAndReturnError), to automate some operations in Microsoft Word. The problem is that after every Applescript call, the Word operates slower and slower (and i guess finally it won't respond at