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Previously the `setListenInExclusiveMode:` call did appear to work,
disabling the normal functioning of the headphone buttons. But my
`NSLog`s in `ddhidAppleMikey:press:upOrDown:` didn't get printed, the
method having not been called.
Since all the other applications I found using DDHidLib were GUI apps
using `NSApplication`, I decided to take this approach here. Set up the
`NSApplication` in `main.c` and added a new `AppDelegate` class.
It seems like the reference to my `HeadphoneKey` instance wasn't getting
retained or something. When I moved the:
HeadphoneKey *h = [[HeadphoneKey alloc] init];
line into `AppDelegate`'s `applicationDidFinishLaunching:`, nothing
changed. However, when I moved all code from `HeadphoneKey` into
`AppDelegate`, my `ddhidAppleMikey:press:upOrDown:` method _did_ get
called.
At that point, it was logical to try adding a `HeadphoneKey` instance
variable and `init`ing into that variable. As a result, we now have a
working `ddhidAppleMikey:press:upOrDown:` delegate method that correctly
logs the headphone key events!
Here are the reference applications I looked at using DDHidLib, found
using a simple GitHub search:
- https://github.com/radiant-player/radiant-player-mac/pull/450/files
- https://github.com/7hil/mac_ear_control/blob/8859ed554517ce798b8ae7c2d0e78610b9994300/mac_ear_control/AppDelegate.m
- https://github.com/7hil/mac_ear_control/blob/8859ed554517ce798b8ae7c2d0e78610b9994300/mac_ear_control/AppDelegate.m
- https://github.com/schrekia/beardedspice-enhanced/blob/a9b78c0dbae6bca2cb0d2ecc362e4b7fe5b02129/BeardedSpiceControllers/BSCService.m
- https://github.com/beardedspice/beardedspice/blob/8e1aea5bda68395e6b0d866bca9289a2a5ba40ed/BeardedSpiceControllers/BSCService.m
- https://github.com/beardedspice/beardedspice/blob/8e1aea5bda68395e6b0d866bca9289a2a5ba40ed/BeardedSpiceControllers/BSCService.m
- https://github.com/BarakaAka1Only/radiant-player-mac-BarakaLyrics/blob/1ce889bbb80f081209aff7936a329a3b426462e9/radiant-player-mac/AppDelegate.m
- https://github.com/zsszatmari/MagicKeys/blob/210015d5da876cd7bb1daf73efa3c775c18e7973/MagicKeys-Agent/SPMediaKeyTap.m
Thanks immensely this Cocoa With Love article from Matt Gallagher, which
was invaluable in showing me how to create a minimal Cocoa application
without needing a nib, Info.plist, or even application bundle (instead
putting everything in a single executable, making it easier to
distribute this as a command-line application with a built-in daemon):
https://www.cocoawithlove.com/2010/09/minimalist-cocoa-programming.html
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Try to set up a listener for headphone button events. Doesn't appear to
work. The initialiser is called, but the delegate method doesn't appear
to be. I'm not seeing any of those log messages.
Followed an example from here:
https://github.com/radiant-player/radiant-player-mac/pull/450/files
Not sure what I'm doing wrong yet, but decided I should commit what I
have since I can't figure it out right now.
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Since the framework is external, we can't link it directly as it's a
third-party library. As such, it would be separate from our executable.
Instead, link against the static DDHidLib library so that it gets
bundled into the executable.
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This will be our delegate for the DDHID key listener.
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This will hopefully make it easier to interface with `IOHIDLib` and get
events from headphone buttons.
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Taken from https://www.gitignore.io/api/objective-c with modifications.
Cleaned up the comments and got rid of things I didn't think were
necesary.
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