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Asked: 2026-05-19T10:12:16+00:00

I hope someone will be able to help me since this issue is killing

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I hope someone will be able to help me since this issue is killing my productivity..
One week on this even if I am quite new to Mac development.

I have a Carbon application in which I want to add a feature:
Get the path of a file I double clicked in the finder.

I have

  • modified the project to allow Objective C calls.
  • setup a delegate object and assigned it to NSApp
  • implemented - (BOOL)application:(NSApplication *)app openFile:(NSString *)filename
    in the delegate.

the problem: the delegate method is NOT hit when double click a file in the finder.

I am sure I am missing something (memory/scope issue ? Event loop issue (using RunApplicationEventLoop for now)

If somebody has an hint I would be pleased to hear it.

Thank you all.

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1 Answer

  1. Editorial Team

    In a Carbon application, NSApp will be nil. NSApp is defined during the NSApplicationMain function, which is called to start a Cocoa application. In a Carbon application, you need to use Carbon methods to determine when an application is being opened. Install an event handler and listen for the ‘odoc’ apple event.

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