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QApplication ): # Subclass QApplication # Just setup, nothing to see here def _init_ ( self, argv ): super ( MainApp, self ).

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Here’s the snippet that handles this in Quaver:įrom gui import main_window # This file just contains code for the main window import sys from PyQt5 import QtCore, QtWidgets class MainApp ( QtWidgets. In Qt, the event specific to macOS is QFileOpenEvent, and the listener (or event handler) for all events is part of the main QApplication class. So now, your program opens when you click on the right click menu, but nothing happens in the program.Īs it turns out, the program must listen for the event that occurs when a program is launched via the right click menu, and override the default behaviour of doing nothing. Note: this is specific to PyQt, so if you aren’t using that, skip this section! When this is done, run killall Finder to force restart Finder, and your program should now show up in Finder’s context menu! Handling the file open event in PyQt System/Library/Frameworks/amework/Versions/A/Frameworks/amework/Versions/A/Support/lsregister -f /Applications/.app/

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See the footnote for Apple’s documentation on what each type should do.ĬFBundleDocumentTypes CFBundleTypeExtensions mp3 mp4 m4a m4v tta ape wma aiff flac ogg oga opus CFBundleTypeName Audio Files CFBundleTypeRole Viewer Īfter the ist file has been updated and the program has been moved to the Applications folder, run the following command to force Core Services to register the newly claimed filetypes: This role can be any one of Editor, Viewer, Shell, or None. CFBundleTypeRole 4 with a corresponding value, describing what your program does with the file.

CFBundleTypeName 3 with a corresponding value, containing the name that your program assigns to these filetype extensions.CFBundleTypeExtensions 2 key with a corresponding array of values, matching each filetype extension that your program targets.The value corresponding to that should be an array of elements. To integrate with the “Open With” menu on macOS, a CFBundleDocumentTypes 1 key should be added in the ist file. It parses the ist file in the Contents folder at the root of the application bundle, and every key that’s relevant to Core Foundation in that file starts with CF.

On macOS, the framework responsible for managing integration with discovering and managing “open with” context menu items is Core Foundation. This post assumes basic knowledge of macOS application bundle structure.

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This is the second part of the series where I write about things I learned while writing a desktop app. So here’s how I did it, making it work for macOS, Windows, and Ubuntu, and how it handles in PyQt. So you know how you can right click on a file and have options to open it with different programs? That’s what I wanted to do when I was working on my Quaver Lyrics Finder project.

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