[Pyobjc-dev] NSApplicationMain idiom: wish to standardize

[Just v. R. <ju...@le...>]

I've been using the following idiom to enter the Cocoa main event loop for
some time now:


def unexpectedErrorAlert():
    exceptionInfo =
traceback.format_exception_only(*sys.exc_info()[:2])[0].strip()
    return NSRunAlertPanel("An unexpected error has occurred",
            "(%s)" % exceptionInfo,
            "Continue", "Quit", None)


mainFunc = NSApplicationMain
args = (sys.argv,)
while 1:
    try:
        mainFunc(*args)
    except:
        traceback.print_exc()
        if not unexpectedErrorAlert():
            break
        mainFunc = NSApp().run
        args = ()
    else:
        break


It's more complicated than what I originally thought was needed back when we
discussed NSApplicationMain raising exceptions, as simply calling
NSApplicationMain() again causes the main nib to be reloaded.

The thing is, it's quite a few lines now, and I keep copying it to new apps.
I would like to put it in a module, but if it's deemed general enough, I
could also integrate it into PyObjC somewhere. What do people think, is it
desirable to have in PyObjC? I would propose a new submodule op AppKit, eg.
named mainHelper.py. The above could then become

from AppKit import mainHelper
mainHelper.runEventLoop()

Better names are gladly accepted...

Just