Performance

2009-11-15 Thread Chris Carson
Hi all, A performance related question: I've written a Cocoa app that continuously reads data from a USB device and plots it on a graph. It consists of three of my own classes. The first class is the model that submits asynchronous bulk reads to the USB device. The callback for these reads

usb notification

2009-09-08 Thread Chris Carson
Hi all, Can't get a simple example working. AppearedNotificationHandler() should be called in the code below when a USB device (any device for now) is plugged in. I see the NSLog(@registerDeviceCallbackHandler) message appear in the console when I start the application, but never see the

Re: usb notification

2009-09-08 Thread Chris Carson
IOReturnkernErr; You never seem to check for errors. Please ensure your calls are succeeding by checking the value of this variable. If they're failing, use macerror(1) to look up the error number. IOServiceAddMatchingNotification() returns no errors (0). -

NSTableView bug?

2009-07-02 Thread Chris Carson
Hello, I've created a simple application with an NSTableView. I have written a delegate for this table, numberOfRowsInTableView:objectValueForTableColumn:row:, that returns the number of rows in the table when requested. My application uses the table view to display hexadecimal data on a

instance management in IB

2009-05-11 Thread Chris Carson
Hello, I've been scratching my head trying to get a basic delegate/data source Cocoa/AppKit program working and feel that I'm misunderstanding something basic (I've included the code is at the end). I set a breakpoint within the if statement in the init method of MyModel and see it called

Re: instance management in IB

2009-05-11 Thread Chris Carson
Hi Jon, Thanks! That did the trick -- I was way off. Chris - Original Message From: Jonathan Hess jh...@apple.com To: Chris Carson cucar...@yahoo.com Cc: cocoa-dev@lists.apple.com Sent: Tuesday, May 12, 2009 1:19:11 AM Subject: Re: instance management in IB Hey Chris