Handle Double-click Mouse Event and Return Pressed for NSTableView - objective-c

Question

OK, what I need is pretty straightforward, though I can still find nothing specific.
I want to be able to :
track double-click events
track when the NSTableView is in focus, and the "Return" key is pressed.
How would you go about it?
P.S. I've had a look into NSTableViewDelegate specification, but I can't find anything useful.

Answer 1

For double click you need to do just these :
-(void)awakeFromNib{
[self.tableView setDoubleAction:#selector(thisMethod)];
//And if you wish to take selector dynamically, I guess you know how to do :)
}
-(void)thisMethod{
NSLog(#"double clicked");
}

Answer 2

For the return event, subclass your NSTableView and override keyDown:
Swift 5.x:
override func keyDown(with event: NSEvent) {
if event.characters?.count == 1 {
let character = event.keyCode
switch (character) {
// 36 is return
case UInt16(36):
print("return: \(event)")
default:
print("any other key: \(event)")
}
} else {
super.keyDown(with: event)
}
}

Answer 3

There is a way to handle the Return key without having to manually check for its key code.
I'll show the answer in Swift, but it can be applied in Objective-C as well.
First, override keyDown(with:) in your view controller subclass that controls the table view and call interpretKeyEvents(_:):
override func keyDown(with event: NSEvent) {
interpretKeyEvents([event])
}
Second, in the same view controller subclass, override insertNewLine(_:). This is called when the user presses the Return key:
override func insertNewLine(_ sender: Any?) {
// Add your logic to handle the Return key being pressed
}
Here's an example:
class TableViewController: NSViewController {
#IBOutlet var tableView: NSTableView!
override func keyDown(with event: NSEvent) {
interpretKeyEvents([event])
}
override func insertNewLine(_ sender: Any?) {
guard tableView.selectedRow >= 0 else { return }
print("Pressed Return on row \(tableView.selectedRow)")
}
}