How do I set or disable main menu keyboard shortcut programmatically in SwiftUI for a macOS app? - macos

Question

Say, I want to add the following main menu item to my macOS app - Next:
#main
struct MyApp: App {
#ObservedObject var appState = DataViewModel.shared
var body: some Scene {
WindowGroup
{
ContentView()
}
.commands {
CommandGroup(replacing: .pasteboard) {
Button(action: {
appState.nextCurrentID()
}) { Text("Next")}
.keyboardShortcut("V", modifiers: [.command, .option, .shift])
}
}
}
}
But I want to do the following depending on two variables:
enable/disable that menu item's keyboard shortcut depending on appState.EnableShortcutKey
Set the shortcut key depending on appState.ShortcutKey
Set modifiers depending on appState.Modifiers
Where those state variables are declared as such:
#Published public var EnableShortcutKey : Bool = false
#Published public var ShortcutKey : String = "A"
#Published public var Modifiers : NSEvent.ModifierFlags = [.command, .shift]
How do I do that?

Answer 1

Like this:
#main
struct SO_mac_TestsApp: App {
#StateObject var menuOptions = MenuOptions()
var body: some Scene {
WindowGroup {
ContentView()
.environmentObject(menuOptions)
}
.commands {
CommandGroup(replacing: .pasteboard) {
Button(action: {
print("appState.nextCurrentID()")
}) { Text("Next")}
.keyboardShortcut(menuOptions.shortcutKey, modifiers: menuOptions.modifiers)
.disabled(menuOptions.enableShortcutKey == false)
}
}
}
}
class MenuOptions: ObservableObject {
#Published public var enableShortcutKey : Bool = false
#Published public var shortcutKey : KeyEquivalent = "A"
#Published public var modifiers : EventModifiers = [.command, .shift]
}
truct ContentView: View {
#EnvironmentObject var menuOptions: MenuOptions
#State private var shortcut = ""
var body: some View {
Form {
Toggle("Enable Shortcut", isOn: $menuOptions.enableShortcutKey)
TextField("Shortcut", text: $shortcut)
.onSubmit {
menuOptions.shortcutKey = KeyEquivalent(shortcut.first ?? "V")
}
Divider()
Text("Modifiers:")
Toggle("command:", isOn: Binding(
get: { menuOptions.modifiers.contains(.command) },
set: { new,_ in
if new { menuOptions.modifiers.insert(.command)
} else { menuOptions.modifiers.subtract(.command) }
}
) )
Toggle("option:", isOn: Binding(
get: { menuOptions.modifiers.contains(.option) },
set: { new,_ in
if new { menuOptions.modifiers.insert(.option)
} else { menuOptions.modifiers.subtract(.option) }
}
) )
Toggle("shift:", isOn: Binding(
get: { menuOptions.modifiers.contains(.shift) },
set: { new,_ in
if new { menuOptions.modifiers.insert(.shift)
} else { menuOptions.modifiers.subtract(.shift) }
}
) )
Toggle("control:", isOn: Binding(
get: { menuOptions.modifiers.contains(.control) },
set: { new,_ in
if new { menuOptions.modifiers.insert(.control)
} else { menuOptions.modifiers.subtract(.control) }
}
) )
}
.padding()
.onAppear {
shortcut = String(menuOptions.shortcutKey.character)
}
}
}