Hi,
even looking at sources of various interfaces, I cannot really understand
how the interface should behave in respect to lcl when handling keyboard
events.
Let's look at keydown case:
(note: for "event considered handled" I mean the interface should tell
native widgetset that the event has been handled, that is, widgetset doesn't
handle/propagate further that message)
a key has been pressed.
Interface sends a CN_(SYS)KEYDOWN message
If lcl handles it (result<>0), interface should consider the event handled
and stop there
(no xx_char or utf8keypress). right?
if lcl doesn't handle it, interface should proceed:
if key was changed it has to stop. right? the event has to be considered
handled?
Does the interface have to send a LM_(SYS)KEYDOWN message then? does it have
to do the same checks it did for CN_KEYDOWN (handled by lcl/key changed
etc)?
If the key is not "special" (like arrows, ins, canc, return, backspace and
so on) interface
sends an utf8 char via IntUTF8KeyPress.
if lcl handles it (result=true) interface should consider the event
handled and stop
there (no xx_char). right?
if lcl doesn't handle it:
check if key was changed, if so stop. the event has to be considered
handled?
if the key is an ascii char (does ascii mean "<=127" or does it mean "any
non-special key that can be contained in a byte according to current locale,
like iso-something"?) interface should send a CN_(SYS)CHAR. right? Does it
have to do same checks as KEYDOWN case? And should it send a LM_(SYS)CHAR
after that? And again, should it check for all these things?
Moreover:
if key is a unicode character that isn't an ascii character (<=127), should
its keycode be VK_UNKNOWN? But doing so, xx_(SYS)KEYDOWN/KEYUP would be
useless since we pass VK_UNKNOWN as keycode: so keydown/keyup should not be
sent; so if I type an accented letter, being
it not ascii, OnKeyDown/OnKeyUp events won't fire? It's a bit strange...
As you can see, I'm a little bit confused :)
bye,
Giulio
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
_________________________________________________________________
To unsubscribe: mail [EMAIL PROTECTED] with
"unsubscribe" as the Subject
archives at http://www.lazarus.freepascal.org/mailarchives
