Re: GUISwarm and gtk ? - not yet

[Daniel Kottow]

hi,
and thank you, marcus for your patch, although results are pretty
funny... 
let me tell you what i did and what happens:

>   1) Add the alternative ControlPanel below, replacing the printf
>      with the GTK update code.  Add MyControlPanel.o to the OBJECTS in
>      your Makefile.

@implementation GtkControlPanel

- setStateStopped
{
  [probeDisplayManager setDropImmediatelyFlag: YES];
  if (_activity_current)
    {
      [getTopLevelActivity() stop];
      return [self setState: ControlStateStopped];
    }
  else
    {
      [self setState: ControlStateStopped];
      while (state == ControlStateStopped)
        {
          //gtk
          while (gtk_events_pending()) gtk_main_iteration();

          GUI_EVENT_SYNC ();
        }
      return self;
    }
}
@end


 
>   2) Use +poseAs: before creating the GUISwarm in order to make
>      this implementation look like the real ControlPanel.


int
main (int argc, const char **argv)
{
  ObserverSwarm *observerSwarm;

  //work around the const/non-const problem with gnome_init()
  char *argv2[1];
  *argv2 = strdup( *argv);

  gnome_init ("img-example", "0.0", 1, argv2);

  // Swarm initialization: all Swarm apps must call this first.

  initSwarm (argc, argv);

  [GtkControlPanel poseAs: [ControlPanel class]];

  observerSwarm =  [ObserverSwarm create: globalZone];
...
 
>   3) Call your GTK update code along with the doTkEvents code.

in ObserverSwarm.m

- doGtkEvents
{
  while (gtk_events_pending())
    gtk_main_iteration();
  return self;
}

- buildActions
{
  [super buildActions];
  
  displayActions = [ActionGroup create: self];

  [displayActions createActionTo: self         message:
M(processImage)];
  [displayActions createActionTo: actionCache  message: M(doGtkEvents)];
  [displayActions createActionTo: actionCache  message: M(doTkEvents)];
  displaySchedule = [Schedule createBegin: self];

  [displaySchedule setRepeatInterval: displayFrequency]; 
  displaySchedule = [displaySchedule createEnd];
  [displaySchedule at: 0 createAction: displayActions];

  return self;
}


runtime behavior is like follows:

while the simluation is running, everything is fine. i can see my image
getting processed while zooming/panning interactively with the
gtk-widget.

if i stop the simulation, i can get updates on the gtk events, but only
if i put my mouse pointer over the control panel! so you kind of have to
work blindly on the gtk window and then "have a look on what you did"
moving over to the panel ;-)

what do you think of another old-school lesson ?
greetings daniel

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