Catching minimise with opengl/glut.

[Adam Panayis]

Hi, I am trying to catch when a user clicks on the minimise icon in
the top right hand corner of an opengl created window.

Looking at the source code there is a case which is documented to do
this for me but I never seem to hit that piece of code when I click
the minimise icon.

I am on Linux using X.

Snippet:

case SC_MINIMIZE   :
                /* User has clicked on the "-" to minimize the window
*/
                /* Turn off the visibility */
                window->State.Visible = GL_FALSE ;

Can someone point me in the right direction?

Thanks.

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[John F. Fay]

About the only thing I can think of right off, if you can rebuild the
source code, is to stick a print statement at the beginning of the
function (and have it print out only if it's not a redraw event,
otherwise you get tons of them), having it print out the various
event data.  You should get a specific event when you minimize the
window.  Unfortunately I'm not the Linux authority so I can't go much
further into detail.

         - John


At 09:52 AM 9/24/2009, you wrote:

>Hi, I am trying to catch when a user clicks on the minimise icon in
>the top right hand corner of an opengl created window.
>
>Looking at the source code there is a case which is documented to do
>this for me but I never seem to hit that piece of code when I click
>the minimise icon.
>
>I am on Linux using X.
>
>Snippet:
>
>case SC_MINIMIZE   :
>                 /* User has clicked on the "-" to minimize the window
>*/
>                 /* Turn off the visibility */
>                 window->State.Visible = GL_FALSE ;
>
>Can someone point me in the right direction?
>
>Thanks.
>
>------------------------------------------------------------------------------
>Come build with us! The BlackBerry® Developer Conference in SF, CA
>is the only developer event you need to attend this year. Jumpstart your
>developing skills, take BlackBerry mobile applications to market and stay
>ahead of the curve. Join us from November 9-12, 2009. Register now!
>http://p.sf.net/sfu/devconf
>_______________________________________________
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>Freeglut-developer@...
>https://lists.sourceforge.net/lists/listinfo/freeglut-developer

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[John F. Fay]

OK, I tried doing the below with my Cygwin/Windows machine at home
and got an error message:  "failed to open display ''"

Unless somebody can advise, I am not able to run any "freeglut" demos
in my Cygwin window.  (I daresay there has been a discussion about
this before--and possibly directed at me--but at the moment I don't
have the time and energy to go root it out.)

Can anybody else step up to the plate?

         - John


At 08:14 PM 9/27/2009, you wrote:

>About the only thing I can think of right off, if you can rebuild the
>source code, is to stick a print statement at the beginning of the
>function (and have it print out only if it's not a redraw event,
>otherwise you get tons of them), having it print out the various
>event data.  You should get a specific event when you minimize the
>window.  Unfortunately I'm not the Linux authority so I can't go much
>further into detail.
>
>          - John
>
>
>At 09:52 AM 9/24/2009, you wrote:
>
> >Hi, I am trying to catch when a user clicks on the minimise icon in
> >the top right hand corner of an opengl created window.
> >
> >Looking at the source code there is a case which is documented to do
> >this for me but I never seem to hit that piece of code when I click
> >the minimise icon.
> >
> >I am on Linux using X.
> >
> >Snippet:
> >
> >case SC_MINIMIZE   :
> >                 /* User has clicked on the "-" to minimize the window
> >*/
> >                 /* Turn off the visibility */
> >                 window->State.Visible = GL_FALSE ;
> >
> >Can someone point me in the right direction?
> >
> >Thanks.
> >
> >-------------------------------------------------------------------
> -----------
> >Come build with us! The BlackBerry® Developer Conference in SF, CA
> >is the only developer event you need to attend this year. Jumpstart your
> >developing skills, take BlackBerry mobile applications to market and stay
> >ahead of the curve. Join us from November 9-12, 2009. Register now!
> >http://p.sf.net/sfu/devconf
> >_______________________________________________
> >Freeglut-developer mailing list
> >Freeglut-developer@...
> >https://lists.sourceforge.net/lists/listinfo/freeglut-developer
>
>
>------------------------------------------------------------------------------
>Come build with us! The BlackBerry® Developer Conference in SF, CA
>is the only developer event you need to attend this year. Jumpstart your
>developing skills, take BlackBerry mobile applications to market and stay
>ahead of the curve. Join us from November 9-12, 2009. Register now!
>http://p.sf.net/sfu/devconf
>_______________________________________________
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>https://lists.sourceforge.net/lists/listinfo/freeglut-developer

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[André Bleau]

Some parts of this message have been removed. Learn more about Nabble's security policy.

Hi John,
 
It seems you have built freeglut under Cygwin to use X. So you need to install and start Cygwin's X server and set your DISPLAY environnement variable to point at it. Right now, it looks like that variable is empty, hence the error message you got.
 
- André Bleau, Cygwin's OpenGL package maintainer.
 

> Date: Tue, 3 Nov 2009 21:32:37 -0600
> To: freeglut-developer@...
> From: johnffay@...
> Subject: Re: [Freeglut-developer] Catching minimise with opengl/glut.
>
> OK, I tried doing the below with my Cygwin/Windows machine at home
> and got an error message: "failed to open display ''"
>
> Unless somebody can advise, I am not able to run any "freeglut" demos
> in my Cygwin window. (I daresay there has been a discussion about
> this before--and possibly directed at me--but at the moment I don't
> have the time and energy to go root it out.)
>
> Can anybody else step up to the plate?
>
> - John

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