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Proper LostFocus behavior

All -

I am in the process of developing a custom control that mimics the Office
2003 "Inbox" as closely as possible. After a great deal of frustrating work
trying to do a heavily custom-drawn ListView (which is how I believe MS is
doing it) and getting nowhere, I said "screw it" and built the thing from
scratch. I have a UserControl with a few contained controls, a header
control I'm drawing entirely by hand, and a Panel in which I'm doing all my
item drawing (also entirely by hand.) The hierarchy looks like this:

UserControl
- Label (actually a 3rd party label control so I can get the gradient)
- Panel
--- Custom header control (docked to the top of the parent panel)
--- Vertical scrollbar (docked to the right of the parent panel)
--- "client area" panel (docked as "Fill" of the parent panel)

I have coded up "Enter" and "Leave" events for the "client area" panel, so
that I can get the appropriate colors for selected items, and the focus
rectangle when necessary. However, once I put my control on a form, these
events aren't firing when the containing form loses focus. I have a
TreeView control on the form - purely to test my focus-related code - and
the TreeView does fire a LostFocus event when the form loses focus. The
actual UserControl fires a LostFocus event when I click into my panel (which
kinda makes sense, but not really), but not when the form is deactivated.
Hooking a LostFocus to my panel does nothing at all.

I've tried to switch from a UserControl base to a ContainerContro l base,
thinking that the UserControl was somehow "taking over" the focus events
from its contained controls. But that didn't solve anything. Trying the
"ChangeUICu es" event didn't get me anywhere either.

I can't believe that the solution is to pass a reference to the containing
form into the control and catch the "Deactivate " event, but that's what I'm
left with. I am obviously missing something fundamental about all this.
Can someone please point me in the right direction?

TIA

- Scott
Nov 22 '05 #1
0 1292

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