Can't typing on NSTextField

Question

Created Jun ’24

Replies 3

Boosts 0

Participants 3

Hi, I just did a NSTextField with auto complete that show a cities menu bar the problem is when I typing the first letter, the focus change to the menubar and if I try to write another letter it just replace the first letter and not add it how can I fix it?

Thank you!

class NSTextFieldAuto: NSTextField, NSMenuDelegate, NSTextFieldDelegate {
    var suggestionMenu: NSMenu?
    var selectedSuggestionIndex: Int?
    
    override func awakeFromNib() {
        super.awakeFromNib()
        self.delegate = self
        self.suggestionMenu = NSMenu()
        self.suggestionMenu?.delegate = self
    }
    
    override func mouseDown(with event: NSEvent) {
        super.mouseDown(with: event)
        // Deselect all text when the text field is clicked
    }
    
    override func textDidChange(_ notification: Notification) {
        super.textDidChange(notification)
        print("Still typing")
        updateSuggestionMenu()
        showSuggestionMenu()
    }
    
    
    override func textDidEndEditing(_ notification: Notification) {
        print("Finished typing")
        cityDef.setValue(self.stringValue, forKey: cityDefKey)
    }
        
    func updateSuggestionMenu() {
        self.suggestionMenu?.removeAllItems()
        let searchText = self.stringValue.lowercased()
        for (index, city) in allCities.enumerated() {
            if city.lowercased().hasPrefix(searchText) {
                let item = NSMenuItem(title: city, action: #selector(selectSuggestion(_:)), keyEquivalent: "")
                item.target = self
                self.suggestionMenu?.addItem(item)
            }
        }
    }
    
    func showSuggestionMenu() {
        if let menu = self.suggestionMenu, !menu.items.isEmpty {
            let textFieldRect = self.bounds
            let origin = NSPoint(x: textFieldRect.origin.x + 100.0, y: textFieldRect.origin.y + textFieldRect.size.height)
            menu.autoenablesItems = false
            menu.popUp(positioning: nil, at: origin, in: self)
        }
    }
    
    @objc func selectSuggestion(_ sender: NSMenuItem) {
        self.stringValue = sender.title
    }
    
    override func cancelOperation(_ sender: Any?) {
        self.suggestionMenu?.cancelTracking()
        self.window?.becomeFirstResponder()
    }
    
    func menuDidClose(_ menu: NSMenu) {
        self.window?.makeFirstResponder(self) // Set text field as first responder again
        print("Close menu")
    }
    
    override func becomeFirstResponder() -> Bool {
        let result = super.becomeFirstResponder()
        self.selectedSuggestionIndex = nil // Reset selected suggestion index
        return result
    }
}

Boost

Answer 1

DTS Engineer OP

Apple

Jun ’24

When you input the second character, do you see that the first character is selected? If yes, the second character will replace the first one, and that triggers the issue you described.

If that is the case, you might consider the following:

When you return from your menu, make your text field the first responder.
Grab the field editor, which is an NSTextView shared by all text fields in the window for text inputting, and set its selected range to the end of the text using setSelectedRange(_:).

With that, your second character should be inserted to the cursor position, which is the end of the text.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

0

Answer 2

Claude31 OP

Jun ’24

Could you try to remove

updateSuggestionMenu()
showSuggestionMenu()

    override func textDidChange(_ notification: Notification) {
        super.textDidChange(notification)
        print("Still typing")
        // updateSuggestionMenu()
        // showSuggestionMenu()
    }

If the problem disappear, you should reset focus after

updateSuggestionMenu()
showSuggestionMenu()

0

Answer 3

Claude31 OP

Jun ’24

So the test shows that showSuggestionMenu removes focus. I didn't say that was the solution, just a way of testing.

So now, as I suggested before, try to reset focus after

updateSuggestionMenu()
showSuggestionMenu()

0