Re: [udig-devel] how to start threads with monitor?

[Andrea Antonello <andrea.antonello@xxxxxxxxx>]

Hi Jesse,
I think I really miss a piece of the truth...

Reduced to the minimum, I now only try to launch a messagedialog from
within the run method of the  AbstractActionTool retrieved from the
tools extention point. It is really few code:

IRunnableWithProgress runner = new IRunnableWithProgress(){

public void run( IProgressMonitor monitor ) throws
InvocationTargetException, InterruptedException {
	monitor.beginTask("Message!!!", 100);
	MessageDialog dialog = new MessageDialog(new Shell(SWT.BORDER | 	
		SWT.DIALOG_TRIM),
		"Warning", null, "Will I show up?",
		MessageDialog.WARNING, new String[]{"Ok"}, 0);
                dialog.open();
            }

        };

	PlatformGIS.run(runner);


This gives the usual error of invealid thread access. What is wrong here?
If I use the runBlockingOperation method it is worse, nothing shows up.

Any idea?
Andrea






Jesse Eichar probaly wrote:
> Hi,
> 
> Display widgets can only be modified in the display thread.  Take a look
> at the methods is PlatformGIS for a bunch of help with regards to
> threading.
> 
> As mentioned Jobs start up a new thread and allow progress to be
> monitored.  If you set the job's setUser( true ) then the progress
> dialog will open.  Remember that you have to update UI components in the
> Display thread.  Display.asyncExec for example.
> 
> Jesse
> 
> On Apr 23, 2007, at 6:40 AM, Andrea Antonello wrote:
> 
>> Thanks for your reply Zlatko,
>> I tried also the Job way, but I get the same Invalid Thread Access
>> exception:
>>
>> Job job = new Job("my job ") {
>>      protected IStatus run(IProgressMonitor monitor) {
>>            domyCodeWork()
>>            return Status.OK_STATUS;
>>         }
>>      };
>>
>>   job.schedule();
>>
>>
>> Also the code you modified below doesn't work with the same error...
>>
>> I'm really confused (and I'm rather new to RCP and SWT), sinced in my
>> opinion it happens often that you launch a dialog and while the dialog
>> is there you do some work, without freezing the interface. But I can't
>> find working examples.
>>
>> In swing there was this SwingUtilities.invokelater that worked pretty
>> well.
>>
>> I guess I 'm missing something of the deeper theory.
>>
>> Isn't there in udig an Action that does something like that?
>>
>> Andrea
>>
>>
>>
>> Zlatko Perenda probaly wrote:
>>> Hi,
>>>
>>> I did some asking around, this is what a friend of mine came up with....
>>>
>>> You have to implement a job, org.eclipse.core.runtime.jobs.Job . You
>>> have
>>> run(IprogressMonitor pm) there, where you implement the method and
>>> change
>>> whatever you want through pm. You can add listeners if you want to do
>>> something after the job is done.
>>>
>>> And your code from first post, reworked some
>>>
>>> Display display = Display.getCurrent();
>>>             if (display == null)
>>>             {
>>>                 display = Display.getDefault();
>>>             }
>>>  display.asyncExec(new Runnableevent)
>>>                     {
>>>                         public void run()
>>>                         {
>>>>         IWorkbench wb = PlatformUI.getWorkbench();
>>>>         IProgressService ps = wb.getProgressService();
>>>>             ps.busyCursorWhile(new IRunnableWithProgress(){
>>>>                 public void run( IProgressMonitor pm ) {
>>>>                     doMyCodeWithMonitorActivity()
>>>>                 }
>>>>             });
>>>>
>>>      }
>>>                     });
>>>
>>> I hope this helps....
>>>
>>> Zlatko.
>>>
>>> -----Original Message-----
>>> From: Andrea Antonello [mailto:andrea.antonello@xxxxxxxxx]
>>> Sent: Monday, April 23, 2007 2:42 PM
>>> To: Zlatko Perenda
>>> Cc: 'User-friendly Desktop Internet GIS'
>>> Subject: Re: [udig-devel] how to start threads with monitor?
>>>
>>> Hi Zlatko,
>>> that is indeed what I am doing to make it work for now (the asyncExec I
>>> mean), but that doesn't supply my the so much loved monitor...
>>> Where do I get the monitor from?
>>>
>>> Thanks,
>>> Andrea
>>>
>>>
>>>
>>> Zlatko Perenda probaly wrote:
>>>> Hm, seems like you are accesing UI thread, from another....
>>>>
>>>> Try Display.asyncExec(runnable), and let runnable do the neccesary
>>>> work. I
>>>> think this should work.
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
>>>> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Andrea
>>>> Antonello
>>>> Sent: Monday, April 23, 2007 2:25 PM
>>>> To: User-friendly Desktop Internet GIS
>>>> Subject: [udig-devel] how to start threads with monitor?
>>>>
>>>> I know this is more a rcp question than  a udig, but I'm not able to
>>>> add
>>>> progress tracking to my actions.
>>>> The tool extention point doesn't supply a monitor and whenever I try
>>>> somethin g like:
>>>>         IWorkbench wb = PlatformUI.getWorkbench();
>>>>         IProgressService ps = wb.getProgressService();
>>>>
>>>>             ps.busyCursorWhile(new IRunnableWithProgress(){
>>>>                 public void run( IProgressMonitor pm ) {
>>>>
>>>>                     doMyCodeWithMonitorActivity()
>>>>                 }
>>>>             });
>>>> I get an Invalid thread access exception.
>>>>
>>>> Any hint?
>>>> Thanks in advance,
>>>> Andrea
>>>> _______________________________________________
>>>> User-friendly Desktop Internet GIS (uDig)
>>>> http://udig.refractions.net
>>>> http://lists.refractions.net/mailman/listinfo/udig-devel
>>>>
>>>>
>>>
>>>
>> _______________________________________________
>> User-friendly Desktop Internet GIS (uDig)
>> http://udig.refractions.net
>> http://lists.refractions.net/mailman/listinfo/udig-devel
> 
>