Where did the Focus go?

General
1

I have a listbox that seems to lose focus at an inappropriate time…
but cannot figure out “who” is getting/stealing it…

Is there an way to determine where the focus goes when one object “loses” it? short of putting logging code in every possible “gotfocus” event

2

What about Listbox.LostFocus event? Does it fire?

3

AppKit has the notion of ‘firstResponder’

https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSWindow_Class/#//apple_ref/occ/instm/NSWindow/firstResponder

Returns the window’s first responder.

Declaration
SWIFT
var firstResponder: NSResponder { get }

I have seen it in MacOSLib.

4

I know when it gets lost… I need to know who “found” it after listbox lost it

5

Put a BREAK statement in LostFocus, then got forward step by step in the debugger until your out of LostFocus and then check the Focus property on the window.

6

just goes to a “loop” in debugger… no way to tell where it went

7

When does it lose focus ?
Are you editing the content ?

8

Create a Boolean property flag in the window, set it to True in the Listbox.LostFocus event after the BREAK statement.
In the window’s paint event, put:

If flag Then BREAK // Check the Focus property of the window here End

9

[quote=162928:@Norman Palardy]When does it lose focus ?
Are you editing the content ?[/quote]

Yes… this stems from a previous issue

I click a cell and call EDITCELL
something steals the focus, causing me to need to click the cell a 2nd time to restore focus

I am trying to find where the focus is going, so I perhaps can alter the code to keep it from going there, or change the timing of when it goes there.

10

[quote=162931:@Eli Ott]Create a Boolean property flag in the window, set it to True in the Listbox.LostFocus event after the BREAK statement.
In the window’s paint event, put:

If flag Then BREAK // Check the Focus property of the window here End[/quote]

I put that in all the windows that possible could be open… and it never happens

11

I had this once.
I added self.title = me.name to all the controls Gotfocus events

Another time, I found that the problem was that two controls close together were causing each other to refresh and the cursor never had a chance to appear.