OpenEuphoria

RE: EuGrid Version 1.0.1

• Posted by Phil Russell <pg_russell at lineone.net> Sep 18, 2002
• 522 views

Hi Andy,

Thanks for taking a look - all feedback gratefully received!

> 
> I have noticed that sometimes when running a program with a EuGrid, some 
> 
> other fonts in my system sometimes get messed up (they get bigger & 
> bolder).  This generally happens to fonts in the menu bar and in the 
> address bar (where the filename is) in the desktop explorer.  Problem 
> goes away by simply reopening the affected window.  I have seen this 
> maybe once or twice before using win32lib programs without EuGrid, but 
> with EuGrid it seems to happen quite frequently -- generally when I'm 
> actually programming and running the program over & over to test things 
> out.
> 
> Anybody seen this?
> 

I don't think that it is down to EuGrid as it does not allocate any font 
resources internally.  I gather that Derek P. thinks that this is a 
win32lib issue.  EuGrid *does* use a lot of other GDI resources so I 
would be very interested if you get any problems with 'resource 
leakage'.

> 
> Also, I had a problem the other day with it crashing in the EGW_OnSize 
> function.  It was being called from EGW_OnGridEvent when the 
> "GridDraw[grid]" sequence had a length of 0.
> 
> I added an if statement to check the length in the OnGridEvent function:
> 
> if msg = WM_SIZE then
> -- ignore minimize and maximize for child window
> 	if wParam = SIZE_RESTORED then
> 	-- Create new offscreen bitmap
>         
>         -- Added IF statement:
> 	if length(GridDraw[grid])> 0 then
> 		EGW_OnSize( id, grid, lo_word(lParam), hi_word(lParam))
>        end if
> end if
> 
> 
> That seemed to take care of it, but I'm not sure that is the most 
> appropriate solution.  ???
>

A couple of people mentioned this and hopefully it is fixed in 1.0.1.  
The problem seems to be that a window can occasionally get a WM_SIZE 
message before it gets its first WM_DRAWITEM (which triggers the 
populate of GridDraw). I have implemented a slightly different fix to 
the one you suggest - seems to work on my PC but let me know if you get 
any problems...

Regards,

Phil