A simple control to simply store and display a simple keyboard shortcut.
Years ago I’ve had the need to have a control to display a keyboard shortcut that I pressed. There are a bunch of such controls exist on the web, most of which (if not all) are not updated. And for some reason all of them are quite complicated, despite the simple task they achieve; all of them provide APIs to bind global shortcuts, which is useful, but I already have code to do. Some of them also over-engineer it to provide fancy APIs, so fancy that my eyeballs explode.
To protect my eyes, I’ve written this simple NSTextField subclass.
The Swift file is less than 300 lines, of which 100 are for keycode
definitions.
The Xcode project is for an example app. You need only
MWKeyViewer.swift for your own project. Copy the file to your
project directory, add a NSTextField to your storyboard, and change
its class to MWKeyViewer, make appropriate IBoutlet connections,
and you are done.
The MWKeyViewer class provides 2 methods...
clear(): Clear the textfield, and the stored shortcut.setKey(): Set the stored shortcut to the argument, and update the textfield.
... and a variable Key which stores the shortcut, and is supposedly
read-only.
The shortcut is stored in KeyboardKey struct, which provides 2
variables:
Modifiers: NSEventModifierFlags: Stores the modifiers of the shortcutKeyCode: UInt16: Stores the virtual keycode.
Definitions of these variables coincide with those in
NSEvent.
... ... ...
Actually just read the code. It should be self-explanatory.