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A view modifier that can reliably detect double clicks on macOS, even in List
extension View {
/// Adds a double click handler this view (macOS only)
///
/// Example
/// ```
/// Text("Hello")
/// .onDoubleClick { print("Double click detected") }
/// ```
/// - Parameters:
/// - handler: Block invoked when a double click is detected
func onDoubleClick(handler: @escaping () -> Void) -> some View {
modifier(DoubleClickHandler(handler: handler))
}
}
struct DoubleClickHandler: ViewModifier {
let handler: () -> Void
func body(content: Content) -> some View {
content.overlay {
DoubleClickListeningViewRepresentable(handler: handler)
}
}
}
struct DoubleClickListeningViewRepresentable: NSViewRepresentable {
let handler: () -> Void
func makeNSView(context: Context) -> DoubleClickListeningView {
DoubleClickListeningView(handler: handler)
}
func updateNSView(_ nsView: DoubleClickListeningView, context: Context) {}
}
class DoubleClickListeningView: NSView {
let handler: () -> Void
init(handler: @escaping () -> Void) {
self.handler = handler
super.init(frame: .zero)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func mouseDown(with event: NSEvent) {
super.mouseDown(with: event)
if event.clickCount == 2 {
handler()
}
}
}
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