Let's assume we have an application called XpmViewer that displays XPM files (an X11 image format).
Qt 3 does not provide an abstraction for handling Apple events, but it is straightforward to add support for them in your application using Mac's Carbon API. (The QtSingleApplication component, available as a Qt Solution, addresses this issue.) Looking at many files results in launching many instances of the same application. On Windows, this usually is done by launching the application and passing the name of the file as a command line argument. The advantage of this approach is that there is only one instance of the application running. The association element is used in an Ant. If the application is not running, it is launched and then the request is made. The installer for a self-contained application can be set up to register file associations for the application. When a user double clicks on a file in the Finder, Finder sends an Apple event to the application associated with the file and asks it to open the file.
Register dmg file association pdf#
The 108 page PDF available here (warning, this is marked as "legacy", linkrot may occur).Regardless of the reasoning behind this decision, it further complicates matters from a C++ perspective.
Some claim is this approach is advantageous over conservative document-open-file-handling in main() because it "only opens one instance of the application".
Register dmg file association free#
Most platforms, when *.foo is registered with myapp, when MyFile.foo is double-clicked, it dispatches something along the lines of: /path/to/myapp MyFile.fooĪnd although you're free to use this technique on command line on a Mac with success, it simply won't work through Finder and also won't work through double-clicking the associated file on the desktop. make sure the system associates that particular file type with my newly installed appįile association is a bit different on Mac as when compared to other platforms. If people follow these instructions, they'll have their application open, but no specific file opened. Although Tony's information is correct - also explained here - (that dragging the MyApp.app to Applications will register with Launch Services automatically using information from ist xml file and setup file associations), it doesn't fully answer the question about file association.
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