Re: [Ntw-devel] Timers

[Ian L. <dr...@gm...>]

At first glance, it looks like you're omitting the event data
structure in your callback declaration.

It should look like this:

void
ping(struct ntw_event_data, ntwWidget *userdata){
   //ping callback function
}

The problem is that the helloworld.c example isn't clear that this is
the proper declaration for a callback function, you'd have to look at
ntwtest for that.  I'll fix that in the docs so nobody else falls into
the same trap.

By the way, the ntw_event_data structure looks like this:

struct ntw_event_data {
  int32 id;
  int32 event;
  int32 synchronized;
  char data[];
}

With the last char data[] being any applicable data that the client
sends back, such as the new text for an ENTRY_TEXT_CHANGED event, for
example.

Hope that helps,
Ian

On 6/26/06, Yua CaVan <ca...@gz...> wrote:
> I've modified the helloworld.c to add in a timer to test something out and
> realized that we don't have a clean way of closing out dialog windows...
>
> I've created a callback function called ping as well as setting the window
> and timer variables to static:
>
> static ntwWidget * pMainWnd; /* is the main window */
> static ntwWidget * pMainTimer; /* is the timer */
>
> void
> ping (ntwWidget * user_data) {
>   ntwWidget *dlg;
>   ntwWidget *layout;
>   ntwWidget *label;
>   ntwWidget *button;
>   ntwWidget *btnLabel;
>
>   dlg = ntw_dialog_new(
>     pMainWnd, /* parent window */
>     100,            /* width */
>      80,             /* height */
>      TRUE,       /* Modality */
>      "PING!!!!!"  /* Title */
>    );
>
>    layout = ntw_grid_new(3,2,FALSE);
>
>    ntw_container_add(dlg,layout);
>
>    label = ntw_label_new("A timer event has just occured.\n"
>              "Please click the OK button");
>    ntw_grid_add(
>     layout,
>     label,
>     1,
>     2,
>     1,
>     2,
>     0,
>     0,
>     0,
>     0
>    );
>
>   button = ntw_button_new();
>   btnLabel = ntw_label_new("OK");
>
>   ntw_container_add(button,btnLabel);
>
>   ntw_grid_add(
>     layout,
>     button,
>     1,
>     2,
>     2,
>     3,
>     0,
>     0,
>     0,
>     0
>   );
>
>   ntw_add_callback(button, BUTTON_CLICKED, (func_ptr)&closePing,dlg,ASYNC);
>   ntw_add_callback(dlg, DESTROY_EVENT, (func_ptr)&resetPing,NULL,ASYNC);
>   ntw_add_callback(dlg, DELETE_EVENT,(func_ptr)&resetPing,NULL,ASYNC);
>
>   ntw_widget_show(dlg);
> }
>
> now, the dialog will pop up and the timer will be reset when the dialog is
> closed using the close button ( 'X' in the upper-right ), but the closePing
> function:
>
> void
> closePing(ntwWidget * user_data) {
>   ntw_widget_destroy(user_data); /* should be dlg */
> }
>
> seems to destroy the BUTTON, rather than the dialog even though dlg's
> pointer is the user data.  Any clues?
>
> for completeness, here's resetPing:
>
> void
> resetPing() {
>     ntw_timer_reset(pMainTimer);
> }
>
> and the timer is set up as:
> ...
> pMainTimer = ntw_timer_add(10 /* seconds */,ASYNC);
> ntw_timer_set_callback(pMainTimer, (func_ptr)&ping, timer);
>
> Yua Ca Van
> ----- Original Message -----
> From: "Ian Larsen" <dr...@gm...>
> To: "Yua CaVan" <ca...@gz...>
> Cc: "NTW Mailing List" <ntw...@li...>
> Sent: Monday, June 26, 2006 2:21 PM
> Subject: Re: [Ntw-devel] Timers
>
>
> > Oh yeah...thanks.  Done. :-)
> >
> > -Ian
> >
> > On 6/26/06, Yua CaVan <ca...@gz...> wrote:
> >> You need to update the Makefile.mingw for the Server and Client to add
> >> timer.o to the list of objects to be compiled. :)
> >>
> >> Yua Ca Van
> >> ----- Original Message -----
> >> From: "Ian Larsen" <dr...@gm...>
> >> To: "NTW Mailing List" <ntw...@li...>
> >> Sent: Sunday, June 25, 2006 2:38 PM
> >> Subject: [Ntw-devel] Timers
> >>
> >>
> >> > All,
> >> >
> >> > I've added a timer widget to the C server and client.   The latest is
> >> > in CVS.  It seems to work well, but I haven't tested it very much yet.
> >> >
> >> > The code is in the files timer.c and timer.h, in both the Client and
> >> > Server directories.
> >> >
> >> > -Ian
> >> >
> >> > Using Tomcat but need to do more? Need to support web services,
> >> > security?
> >> > Get stuff done quickly with pre-integrated technology to make your job
> >> > easier
> >> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> >> > Geronimo
> >> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> >> > _______________________________________________
> >> > Ntw-devel mailing list
> >> > Ntw...@li...
> >> > https://lists.sourceforge.net/lists/listinfo/ntw-devel
> >> >
> >> >
> >>
> >>
> >>
> >
> >
>
>
>