[ Sorry again all for my double postings ]
Hi Steve,
Steve Cookson wrote:
So that's how it works! So if I want to detect tabbing out of a field
to trigger validation, I use the lose focus event (EVT_KILL_FOCUS) on
the control. But alt-tab (and I guess alt-esc etc) to another app
also trigger it. How can I filter out alt-tab etc?
I know you've been tackling that for a few days, I'm still not sure I
can help.
I don't think filtering keys is the way to go. I'd imagine it's not the
actual keypress that generates a KILL_FOCUS, it's the /result/ of the
keypress, if you get me. I think the best you could do with filtering
key presses would be to disable alt-tab / program switching altogether
when in that text field. That'd be in an event handler of a TextCtrl you
subclassed yourself. You'd have to read up the wxWidgets docs [0],
particularly wxKeyEvent and wxKeyCode to see what combination of
EVT_KEY_DOWN, EVT_KEY_UP and/or EVT_CHAR you'd need to do what you need.
Looking around in the docs, I think a better way to do what you need
would be using Wx::Window::FindFocus() [1] (in wxWidgets there's also a
HasFocus() event that could be even more elegant but grep'ing for that
doesn't show it anywhere in the Wx-0.91 source; maybe someone could
correct me on that).
Could you just have something at the start of your EVT_KILL_FOCUS
handler like this?
if ( Wx::Window::FindFocus ne $self->{nextCtrlByTab} ) { return; }
Or conceivably just if ( FindFocus == NULL ) if it returns null when
focus has moved out of the program.
What do you think, workable?
-- Ryan
[0] http://docs.wxwidgets.org/trunk/
[1]
http://docs.wxwidgets.org/trunk/classwx_window.html#777258379a3eef1b0530f12db6b77cab
