RE: [Plib-users] pui help

[Brian S. <sch...@ho...>]

Bruce:
   Your right!! i didn't even realize that, how then would I create this 
object as a global variable, in my header file I just have puOneShot 
*backButton; to make it global,  then when it gets to createTeamButtons() it 
does create a new one (why the address was different between the backButton 
created and the backButton called to hide).  However if I put this line in 
the header file
puOneShot *backButton = new puOneShot (20.0, 20.0, 170.0, 50.0);

I get a fatal error before anything starts up saying

FATAL:  puiGetWindow:  callbacks are not initialized

I'm guessing this is so because at the time of the .h file I have not 
initialized pui yet.  So how would I create a global object??

-Brian

>Brian:
>   I had to go back to my deleted mail to check this.  In one of your
>later mails you said that backButton is global but you are redefining it
>in:
>
>void createTeamButtons() {
>     puOneShot *backButton = new puOneShot (20.0, 20.0, 170.0, 50.0);
>...
>
>
>You may want to double check that
>
>Bruce
>
>-----Original Message-----
>From: pli...@li...
>[mailto:pli...@li...] On Behalf Of Brian Smith
>Sent: Tuesday, April 06, 2004 10:20 PM
>To: pli...@li...
>Subject: Re: [Plib-users] pui help
>
>
>
>
> >Brian Smith wrote:
> >>Running VC++6.0 with windows XP, plib 1.8.2, I was wondering if anyone
> >>could help me out,  I need to hide puObjects but whenever I use
>.hide()
> >>the program crashes and I get an unhandled exception:  access
>violation.
> >>Any suggestions?? thanks in advance.
> >
> >Well, I've used hide() quite a bit with no problems - we're going to
> >need a LOT more information if this is truly a PLIB bug.
> >
> >It crashes inside hide() ?
> >
> >If so, it *MUST* be that the puObject you are calling it on is an
> >invalid pointer...all hide() does is access an internal member and call
>
> >puPostRefresh - and all THAT does is set a global.
> >
> >However, if calling hide() causes it to die sometime later then we
> >could be looking at something complicated.
> >
> >Could you get us a stack back-trace from the crash?   Or maybe
> >show us some source code?
> >
>
>I'll try and explain what the program is doind and show ya the relevant
>source.  I have two display functions, the first one has no pui objects
>at
>all but when i switch to the second display function there are some
>buttons
>on it, one of the buttons I have is a back button which returns to the
>first
>display function.
>
>so when the second display function is eventually called I call the
>function
>createTeamButtons() which is this:
>
>void createTeamButtons() {
>     puOneShot *backButton = new puOneShot (20.0, 20.0, 170.0, 50.0);
>     backButton->setLegend("Back");
>     backButton->setCallback(backButtonCallback);
>}
>
>the callback function for this button (backButtonCallback) is this:
>
>void backButtonCallback(puObject *) {
>     glutKeyboardFunc(NULL);
>     glutSpecialFunc(NULL);
>     glutIdleFunc(Main_Display);
>     glutDisplayFunc(Main_Display);
>     glutPassiveMotionFunc(Main_MouseMove);
>     glutMouseFunc(Main_MouseChoose);
>     hideTeamButtons();
>}
>
>and hide TeamButtons() is this:
>
>void hideTeamButtons() {
>     backButton->hide();
>}
>
>so in the program when I click the back button the program crashes and
>an
>error dialog pops up saying:
>
>Unhandled exception in program.exe: 0xC0000005:  Access Violation.
>
>I say it crashes on hide because:  1)when I debug it is calling the hide
>
>function in pu.h while crash
>                                               2)if hide() isn't in
>hideTeamButtons()  (I was gonna try just
>                                                  deleting everything
>everytime the program returns to the first
>                                                  display function but
>figured hide would be much easier)
>
>there are more buttons for the second display function but this is the
>most
>relevent one, if I try hide one or hide them all doesn't matter so only
>put
>the one in.  Thats all i got for ya, if theres anything else ya want let
>me
>know.
>
>-Brian

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