Callback

QNX Newsgroups (Archives) qnx.gui
1

Hi,
In One of my project i am using Code like this:

Start_Button Callback()
{
Block Processs_Buuton;
;
;
Programming…;
;
;
;
Enable Processs_Buuton;
Pt_CONTINUE;
}

With this above code I am not able to block Process_Button, while
programming. I think reason behind this disabling and enabling button is
under same callback. How to handle like this situations?

Urgent Please…
Thanks,
With Best Regards,
Suresh.

2

Suresh Kumar <skavula@nordson.com> wrote:
SK > Hi,
SK > In One of my project i am using Code like this:

SK > Start_Button Callback()
SK > {
SK > Block Processs_Buuton;
SK > ;
SK > ;
SK > Programming…;
SK > ;
SK > ;
SK > ;
SK > Enable Processs_Buuton;
SK > Pt_CONTINUE;
SK > }

SK > With this above code I am not able to block Process_Button, while
SK > programming. I think reason behind this disabling and enabling button is
SK > under same callback. How to handle like this situations?

SK > Urgent Please…
SK > Thanks,
SK > With Best Regards,
SK > Suresh.

Are you saying that this callback is somewhat lengthy and that the user
can click on the button additional times while this callback is being
processed?

If I understand your question correctly, I think what your up against
is the fact that resource changes made don’t take effect until after
your program is done with the Photon loop.

3

Hi ,
Here with i am giving my question more clearly with code for easy
understand.

Code:

int ButtonCallback (PtWidget_t *widget, ApInfo_t *apinfo, PtCallbackInfo_t
*cbinfo)
{
//Create small window from Code, Placed OK button on that window
ApCreateModule (ABM_WINDOW, NULL, cbinfo);
//Disable OK Button from user actions
PtSetResource (ABW_OKBUUTON, Pt_ARG_FLAGS, Pt_TRUE, PT_GHOST |
Pt_SELECTABLE);

//Program Code and it will take minimum one Minute
Programming_Code();

//Enable OK Button for user actions
PtSetResource (ABW_OKBUUTON, Pt_ARG_FLAGS, Pt_FALSE, PT_GHOST |
Pt_SELECTABLE);
}
My aim of above code is while programming, I want to disable OK
Button and after programming I want to make it enable. In my project this
type of situations many. How to handle this type of situations?

Looking forward with this mail,
Thanks,
With Best Regards,
Suresh.

4

You use PtSetResource to disable the OK button, but this change in resource
will not take effect until your callback routine has returned Pt_CONTINUE.
One way of doing what you want is to arm a timer and disable the OK button
in the callback and return Pt_CONTINUE. Then execute your Programming_Code()
and re-enable the OK button in the timer callback.

“Suresh Kumar” <skavula@nordson.com> wrote in message
news:ch0v3c$2kf$1@inn.qnx.com…

Hi ,
Here with i am giving my question more clearly with code for easy
understand.

Code:

int ButtonCallback (PtWidget_t *widget, ApInfo_t *apinfo, PtCallbackInfo_t
*cbinfo)
{
//Create small window from Code, Placed OK button on that window
ApCreateModule (ABM_WINDOW, NULL, cbinfo);
//Disable OK Button from user actions
PtSetResource (ABW_OKBUUTON, Pt_ARG_FLAGS, Pt_TRUE, PT_GHOST |
Pt_SELECTABLE);

//Program Code and it will take minimum one Minute
Programming_Code();

//Enable OK Button for user actions
PtSetResource (ABW_OKBUUTON, Pt_ARG_FLAGS, Pt_FALSE, PT_GHOST |
Pt_SELECTABLE);
}
My aim of above code is while programming, I want to disable OK
Button and after programming I want to make it enable. In my project this
type of situations many. How to handle this type of situations?

Looking forward with this mail,
Thanks,
With Best Regards,
Suresh.




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