OpenEuphoria

Re: Month Calendar control: make dates bold? Notification delay in Win32Lib?

• Posted by Jonas Temple <jtemple at yhti.net> Feb 23, 2005
• 566 views

danielmoyer wrote:
> 
> 
> Thanks Jonas,
> 
> I've used the  SetSelectedDate() in Win32Lib to move the date around
> programmatically, but what I'm trying to do is not *set* the date, (as in
> make the calendar show that date with an ellipse around it), but rather make
> specified dates show up in bold print (so as to specify "something special"
> about those dates).
> 
> I copied a bunch of stuff like what you suggested above from the MS site,
> including "Processing the MCN_GETDAYSTATE Notification Message", and
> "MCN_GETDAYSTATE Notification ", "NMDAYSTATE Structure", "NMHDR Structure ",
> "SYSTEMTIME structure", etc, but I don't know how to translate it all (or
> even your  simpler suggestion) into Euphoria code.
> 
> Probably this is something that could/should be added to Win32Lib?
> 
> But in the meantime, any help from anyone in xlating the C stuff into
> Euphoria would be appreciated.
> 
> Dan
> 

Dan, 

I've been trying desperately to come up with a working example of using
either MCM_SETDAYSTATE or MCN_GETDAYSTATE.  I can't figure out
MCM_SETDAYSTATE.  But in reality, would you really want to set that many
days states at one time (for multiple months)?  I think the better 
solution is to use (as you said) MCN_GETDAYSTATE.  First thing, your
calendar control will need to have the MCS_DAYSTATE style.  Then, you 
would need to code a notification routine for the MCN_GETDAYSTATE:

--------------------------------------------------------------------------------
-- Set day state
function CalendarCC_onDayState(integer id, atom hWnd, atom wParam, atom lParam)
	atom hwndFrom, idFrom, code, cDayState, daystates,
		year, month, dayofweek, day, hour, minute,
		second, millisecond 
		
trace(1)
		
	-- Get the structure data
	hwndFrom = peek4u(lParam)
	idFrom = peek4u(lParam+4)
	code = peek4u(lParam+8)
	year = peek2u(lParam+12)
	month = peek2u(lParam+14)
	dayofweek = peek2u(lParam+16)
	day = peek2u(lParam+18)	
	hour = peek2u(lParam+20)
	minute = peek2u(lParam+22)
	second = peek2u(lParam+24)	
	cDayState = peek4u(lParam+26)
	daystates = peek4u(lParam+30)
	
	
	return kReturnNow
end function
void = setNotifyHandler(MCN_GETDAYSTATE, routine_id("CalendarCC_onDayState"))

Now, you're probably saying "Where's the rest of the routine"?  Well I 
coded the above just to make sure I was receiving the notification.  The
first thing I noticed was that when the calendar control is initially
displayed my program receives no MCN_GETDAYSTATE notification.  I'm not 
sure if this means Windows assumes you used MCM_SETDAYSTATE for the initial
calendar or not.  When I change the month then I do get MCN_GETDAYSTATE but
the year, month and day values are for the previous month displayed, not
the new month being displayed. It's like the notification is an "after" 
notification, not a "before".

So the long of the short is, I'm still working on an example.  If anyone
knows why the delay of notification is happening then that would be
great.

BTW, this example uses words.e by Bernie Ryan.

Jonas Temple
http://www.yhti.net/~jktemple