NSTextField alignment when selected in NSTableView - macos

Question

I have a programmatically created NSTableView with n rows and 1 column. The embedded text field is selectable, and not editable. I am able to observe the mouseDown event in the text field, but as you can see in the image, the selected row is repositioned and word wrapped. I suspect this may be related to the field editor, but my MacOS odyssey has proven me wrong innumerable times.
My question: What do I need to do to maintain the layout of the selected row to be consistent with the other rows in the table?
Update: adding a textfield.cell.wraps = false to the tableview delegate eliminated the word wrap, but still have the issue with the selected text field indented.
Code snippets:
From the table delegate:
func tableView (_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
{
let text = dataArray [row]
var v = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier.init(rawValue: "TableColumn"), owner: self) as? MyTextFieldExt
if v == nil
{
v = MyTextFieldExt ()
v?.identifier = NSUserInterfaceItemIdentifier(rawValue: "TableColumn")
v?.maximumNumberOfLines = 1
v?.autoresizingMask = [.width]
v?.setContentHuggingPriority(NSLayoutConstraint.Priority(rawValue: 251), for: .horizontal)
v?.translatesAutoresizingMaskIntoConstraints = false
v?.isEditable = false
v?.isSelectable = true
v?.cell?.wraps = false
}
v!.stringValue = text
v!.font = NSFont.monospacedSystemFont(ofSize: 10, weight: .regular)
v!.frame = CGRect(x: 0, y: 0, width: 3000, height: 0)
return v!
}
From the text field (custom) that traps the mouseDown:
override func mouseDown(with event: NSEvent)
{
super.mouseDown(with: event)
let cEditor = self.currentEditor() as? NSTextView
let localPos = convert (event.locationInWindow, to: nil)
let location = cEditor?.selectedRange().location
if let r = cEditor?.selectedRange()
{
self.select(withFrame: self.frame, editor: cEditor!, delegate: self, start: r.location, length: r.length+10)
}
}
From the view controller that creates the scrollview, table view, and column:
func setupTableView ()
{
let tableView = MyTableViewExt ()
tableView.selectionHighlightStyle = .none
tableView.headerView = nil
tableView.columnAutoresizingStyle = .lastColumnOnlyAutoresizingStyle
tableView.autoresizesSubviews = true
tableView.autoresizingMask = [.width, .height]
let column = NSTableColumn ()
column.identifier = NSUserInterfaceItemIdentifier(rawValue: "TableColumn")
column.width = 426
column.minWidth = 40
column.maxWidth = 1000
column.resizingMask = [.autoresizingMask, .userResizingMask] // verify in debugger
tableView.addTableColumn(column)
tableView.delegate = self
tableView.dataSource = self
let scrollView = NSScrollView (frame: self.view.bounds)
scrollView.autoresizesSubviews = true
scrollView.autoresizingMask = [.height, .width]
scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollView.hasHorizontalScroller = true
scrollView.hasVerticalScroller = true
self.view.addSubview(scrollView)
self.view.addConstraint(NSLayoutConstraint (item: self.view, attribute: .trailing, relatedBy: .equal, toItem: scrollView, attribute: .trailing, multiplier: 1.0, constant: 20))
self.view.addConstraint(NSLayoutConstraint (item: scrollView, attribute: .leading, relatedBy: .equal, toItem: self.view, attribute: .leading, multiplier: 1.0, constant: 20))
self.view.addConstraint(NSLayoutConstraint (item: self.view, attribute: .bottom, relatedBy: .equal, toItem: scrollView, attribute: .bottom, multiplier: 1.0, constant: 20))
self.view.addConstraint(NSLayoutConstraint (item: scrollView, attribute: .top, relatedBy: .equal, toItem: self.view, attribute: .top, multiplier: 1.0, constant: 20))
scrollView.documentView = tableView
}

Answer 1

So my problem was resolved by modifying the code in the text field mouseDown logic. The corrected code looks like this, with a change in setting the selected range:
override func mouseDown(with event: NSEvent)
{
super.mouseDown(with: event)
let cEditor = self.currentEditor() as? NSTextView
let localPos = convert (event.locationInWindow, to: nil)
let insertionPoint = cEditor?.characterIndexForInsertion(at: localPos)
let location = cEditor?.selectedRange().location
if let r = cEditor?.selectedRange()
{
// self.select(withFrame: self.frame, editor: cEditor!, delegate: self, start: r.location, length: r.length+10) <-- Source of problem
cEditor?.setSelectedRange(NSMakeRange(r.location, r.length+10)) <-- Solution to problem
}
}
And just to be clear, the statement of not requiring the textfield.cell?.wraps = false I made in a comment is incorrect. That line is needed in my table view delegate to avoid the word wrap.