Home » Eclipse Projects » Eclipse Platform » Status Bar and setMessage
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| Re: Status Bar and setMessage [message #334053 is a reply to message #334051] |
Fri, 16 January 2009 16:05   |
Eclipse User |
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Originally posted by: subs._nospam_consertum.com
Looks like you are running your code in the UI thread and thus blocking
any updates. You should be running your long-running code in another
thread, or use a Job to do it.
Andy wrote:
> Hi,
>
> I have an action that can take a while to complete so I wanted to put
> some feedback in the status bar showing when the action started and when
> it completed.
> The main problem is that this code only causes "Pasting Completed" to be
> shown. Any ideas as to get this code to show "Pasting Started" at the
> beginning, then do the file copying, and show Pasting Completed at the
> end?
> Just to see what would happen, I removed the last "Pasted Completed"
> line and ran it. The run method did all its work and then showed
> "Pasting Started" when it was done. Anyway, not sure why setMessage
> seems to be called last no matter where it is in the program flow. Any
> suggestions? Thanks,
>
>
> pasteAction = new Action(){
> public void run(){
>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> Started");
>
> // do some work that could take a while
>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> Completed");
>
>
> }
>
> };
>
--
Derek
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| Re: Status Bar and setMessage [message #334078 is a reply to message #334053] |
Mon, 19 January 2009 15:14 |
 Andy
Messages: 47
Registered: July 2009 |
Member |
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|
I made the code look like the following:
pasteAction = new Action(){
public void run(){
Job myjob = new Job("A Job") {
protected IStatus run(IProgressMonitor monitor) {
System.out.println("In the background job");
getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
Pasting");
return Status.OK_STATUS;
}
};
myjob.setPriority(Job.SHORT);
myjob.schedule();
// do some work that could take a while
getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
Completed");
}
};
But now this time I get a thread access violation in addition to it
appearing to run at the end of the method instead of the beginning. Is
there a different way to do this? Yes, I do have this running in a class
that extends ViewPart. If this doesn't work as a job how would I run it?
Why would it be blocked? Thanks,
Andy
Derek wrote:
> Looks like you are running your code in the UI thread and thus blocking
> any updates. You should be running your long-running code in another
> thread, or use a Job to do it.
> Andy wrote:
>> Hi,
>>
>> I have an action that can take a while to complete so I wanted to put
>> some feedback in the status bar showing when the action started and when
>> it completed.
>> The main problem is that this code only causes "Pasting Completed" to be
>> shown. Any ideas as to get this code to show "Pasting Started" at the
>> beginning, then do the file copying, and show Pasting Completed at the
>> end?
>> Just to see what would happen, I removed the last "Pasted Completed"
>> line and ran it. The run method did all its work and then showed
>> "Pasting Started" when it was done. Anyway, not sure why setMessage
>> seems to be called last no matter where it is in the program flow. Any
>> suggestions? Thanks,
>>
>>
>> pasteAction = new Action(){
>> public void run(){
>>
>> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
>> Started");
>>
>> // do some work that could take a while
>>
>> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
>> Completed");
>>
>>
>> }
>>
>> };
>>
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| Re: Status Bar and setMessage [message #334096 is a reply to message #334078] |
Tue, 20 January 2009 15:56 |
| Eclipse User |
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Originally posted by: wegener.cboenospam.com
You've got the wrong thing in the job. You need to place the long running
work in the run method of the job and the "Start" code should be invoked
after scheduling the job. Wrap the "Completed" code in a Display.asyncExec
call and put it in the jobs run method after the long running work.
"Andy " <andrewnbenjamin@hotmail.com> wrote in message
news:26c2ecc53c6641797339d5b48dec3886$1@www.eclipse.org...
> I made the code look like the following:
>
>
> pasteAction = new Action(){
> public void run(){
>
> Job myjob = new Job("A Job") {
> protected IStatus run(IProgressMonitor monitor) {
> System.out.println("In the background job");
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
> Pasting");
> return Status.OK_STATUS;
> }
> };
> myjob.setPriority(Job.SHORT);
> myjob.schedule();
>
> // do some work that could take a while
>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> Completed");
>
>
> }
>
> };
>
> But now this time I get a thread access violation in addition to it
> appearing to run at the end of the method instead of the beginning. Is
> there a different way to do this? Yes, I do have this running in a class
> that extends ViewPart. If this doesn't work as a job how would I run it?
> Why would it be blocked? Thanks,
>
> Andy
>
>
> Derek wrote:
>
> > Looks like you are running your code in the UI thread and thus blocking
> > any updates. You should be running your long-running code in another
> > thread, or use a Job to do it.
>
> > Andy wrote:
> >> Hi,
> >>
> >> I have an action that can take a while to complete so I wanted to put
> >> some feedback in the status bar showing when the action started and
when
> >> it completed.
> >> The main problem is that this code only causes "Pasting Completed" to
be
> >> shown. Any ideas as to get this code to show "Pasting Started" at the
> >> beginning, then do the file copying, and show Pasting Completed at the
> >> end?
> >> Just to see what would happen, I removed the last "Pasted Completed"
> >> line and ran it. The run method did all its work and then showed
> >> "Pasting Started" when it was done. Anyway, not sure why setMessage
> >> seems to be called last no matter where it is in the program flow. Any
> >> suggestions? Thanks,
> >>
> >>
> >> pasteAction = new Action(){
> >> public void run(){
> >>
> >>
getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> >> Started");
> >>
> >> // do some work that could take a while
> >>
> >>
getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> >> Completed");
> >>
> >>
> >> }
> >>
> >> };
> >>
>
>
>
>
|
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| Re: Status Bar and setMessage [message #334122 is a reply to message #334096] |
Wed, 21 January 2009 15:06 |
Andy
Messages: 47
Registered: July 2009 |
Member |
|
|
Dave,
Thanks for the suggestions. The issue that I am having is that Job
doesn't appear to work because it yields a thread error. I switched to
using a UIJob and that allowed it to run, but the side effect was that
Eclipse appeared not to fork and run the UI and the thread in parallel,
but instead to just execute down the job path and ignore the rest of the
code in the UI thread.
My code looks like this now:
getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
Pasting");
System.out.println("At the beginning");
UIJob job = new UIJob("My Job") {
public IStatus runInUIThread(IProgressMonitor monitor) {
System.out.println("In the job");
// Do the long running work here
return Status.OK_STATUS;
}
};
job.setPriority(Job.SHORT);
job.schedule(); // start as soon as possible
PlatformUI.getWorkbench().getDisplay().asyncExec((Runnable)j ob);
getViewSite().getActionBars().getStatusLineManager().setMess age( "End
Pasting");
System.out.println("At the end");
When I look at the console the output is
At the beginning
In the job
and then when all the stuff completes in the job "Start Pasting", not "End
Pasting", shows up in the status line.
So there are still two problems
1) How do I get the status bar to update at the beginning of the method so
that it displays "Start Pasting" *prior* to me doing the copy? Whether I
used another thread or not it still won't display feedback to the user
while it does the work, only after everything is done.
2) Why doesn't async execute like it should? Instead it just goes down
the new thread path and that is it.
At this point am I doing something wrong or is this a bug?
Thanks,
Andy
Dave Wegener wrote:
> You've got the wrong thing in the job. You need to place the long running
> work in the run method of the job and the "Start" code should be invoked
> after scheduling the job. Wrap the "Completed" code in a Display.asyncExec
> call and put it in the jobs run method after the long running work.
> "Andy " <andrewnbenjamin@hotmail.com> wrote in message
> news:26c2ecc53c6641797339d5b48dec3886$1@www.eclipse.org...
>> I made the code look like the following:
>>
>>
>> pasteAction = new Action(){
>> public void run(){
>>
>> Job myjob = new Job("A Job") {
>> protected IStatus run(IProgressMonitor monitor) {
>> System.out.println("In the background job");
>> getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
>> Pasting");
>> return Status.OK_STATUS;
>> }
>> };
>> myjob.setPriority(Job.SHORT);
>> myjob.schedule();
>>
>> // do some work that could take a while
>>
>> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
>> Completed");
>>
>>
>> }
>>
>> };
>>
>> But now this time I get a thread access violation in addition to it
>> appearing to run at the end of the method instead of the beginning. Is
>> there a different way to do this? Yes, I do have this running in a class
>> that extends ViewPart. If this doesn't work as a job how would I run it?
>> Why would it be blocked? Thanks,
>>
>> Andy
>>
>>
>> Derek wrote:
>>
>> > Looks like you are running your code in the UI thread and thus blocking
>> > any updates. You should be running your long-running code in another
>> > thread, or use a Job to do it.
>>
>> > Andy wrote:
>> >> Hi,
>> >>
>> >> I have an action that can take a while to complete so I wanted to put
>> >> some feedback in the status bar showing when the action started and
> when
>> >> it completed.
>> >> The main problem is that this code only causes "Pasting Completed" to
> be
>> >> shown. Any ideas as to get this code to show "Pasting Started" at the
>> >> beginning, then do the file copying, and show Pasting Completed at the
>> >> end?
>> >> Just to see what would happen, I removed the last "Pasted Completed"
>> >> line and ran it. The run method did all its work and then showed
>> >> "Pasting Started" when it was done. Anyway, not sure why setMessage
>> >> seems to be called last no matter where it is in the program flow. Any
>> >> suggestions? Thanks,
>> >>
>> >>
>> >> pasteAction = new Action(){
>> >> public void run(){
>> >>
>> >>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
>> >> Started");
>> >>
>> >> // do some work that could take a while
>> >>
>> >>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
>> >> Completed");
>> >>
>> >>
>> >> }
>> >>
>> >> };
>> >>
>>
>>
>>
>>
|
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| Re: Status Bar and setMessage [message #334124 is a reply to message #334122] |
Wed, 21 January 2009 15:40 |
| Eclipse User |
|
|
|
Originally posted by: wegener.cboenospam.com
You are scheduling and executing the job. You should only be doing one of
these. Long running processes should not be executed on the UI thread.
When the process is executing, your UI will be frozen. The UI thread should
only be used when you need to access a UI element. This would include
setting the message on the status line. If the results of the long running
code need to be displayed on the GUI, you will need to wrap the UI updates
in a runnable that gets passed to Display.asyncExec().
UIJob job = new UIJob() {
public IStatus run(IProgressMonitor monitor) {
//do the long running work here
Runnable results = new Runnable() {
public void run(){
// update UI elements here;
statusLineManager.setMessage("End Pasting");
}
};
display.asyncExec(results);
}
};
job.schedule();
"Andy " <andrewnbenjamin@hotmail.com> wrote in message
news:96ffaa211fcefc497e6b2b91538c91ed$1@www.eclipse.org...
> Dave,
>
> Thanks for the suggestions. The issue that I am having is that Job
> doesn't appear to work because it yields a thread error. I switched to
> using a UIJob and that allowed it to run, but the side effect was that
> Eclipse appeared not to fork and run the UI and the thread in parallel,
> but instead to just execute down the job path and ignore the rest of the
> code in the UI thread.
>
> My code looks like this now:
>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
> Pasting");
> System.out.println("At the beginning");
>
> UIJob job = new UIJob("My Job") {
> public IStatus runInUIThread(IProgressMonitor monitor) {
> System.out.println("In the job");
> // Do the long running work here
>
> return Status.OK_STATUS;
> }
> };
> job.setPriority(Job.SHORT);
> job.schedule(); // start as soon as possible
>
> PlatformUI.getWorkbench().getDisplay().asyncExec((Runnable)j ob);
>
>
> getViewSite().getActionBars().getStatusLineManager().setMess age( "End
> Pasting");
> System.out.println("At the end");
>
> When I look at the console the output is
>
> At the beginning
> In the job
>
> and then when all the stuff completes in the job "Start Pasting", not "End
> Pasting", shows up in the status line.
>
> So there are still two problems
>
> 1) How do I get the status bar to update at the beginning of the method so
> that it displays "Start Pasting" *prior* to me doing the copy? Whether I
> used another thread or not it still won't display feedback to the user
> while it does the work, only after everything is done.
>
> 2) Why doesn't async execute like it should? Instead it just goes down
> the new thread path and that is it.
>
> At this point am I doing something wrong or is this a bug?
>
> Thanks,
>
> Andy
>
>
>
>
>
>
>
>
>
> Dave Wegener wrote:
>
> > You've got the wrong thing in the job. You need to place the long
running
> > work in the run method of the job and the "Start" code should be invoked
> > after scheduling the job. Wrap the "Completed" code in a
Display.asyncExec
> > call and put it in the jobs run method after the long running work.
>
> > "Andy " <andrewnbenjamin@hotmail.com> wrote in message
> > news:26c2ecc53c6641797339d5b48dec3886$1@www.eclipse.org...
> >> I made the code look like the following:
> >>
> >>
> >> pasteAction = new Action(){
> >> public void run(){
> >>
> >> Job myjob = new Job("A Job") {
> >> protected IStatus run(IProgressMonitor monitor) {
> >> System.out.println("In the background job");
> >> getViewSite().getActionBars().getStatusLineManager().setMess age( "Start
> >> Pasting");
> >> return Status.OK_STATUS;
> >> }
> >> };
> >> myjob.setPriority(Job.SHORT);
> >> myjob.schedule();
> >>
> >> // do some work that could take a while
> >>
> >>
getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> >> Completed");
> >>
> >>
> >> }
> >>
> >> };
> >>
> >> But now this time I get a thread access violation in addition to it
> >> appearing to run at the end of the method instead of the beginning. Is
> >> there a different way to do this? Yes, I do have this running in a
class
> >> that extends ViewPart. If this doesn't work as a job how would I run
it?
> >> Why would it be blocked? Thanks,
> >>
> >> Andy
> >>
> >>
> >> Derek wrote:
> >>
> >> > Looks like you are running your code in the UI thread and thus
blocking
> >> > any updates. You should be running your long-running code in another
> >> > thread, or use a Job to do it.
> >>
> >> > Andy wrote:
> >> >> Hi,
> >> >>
> >> >> I have an action that can take a while to complete so I wanted to
put
> >> >> some feedback in the status bar showing when the action started and
> > when
> >> >> it completed.
> >> >> The main problem is that this code only causes "Pasting Completed"
to
> > be
> >> >> shown. Any ideas as to get this code to show "Pasting Started" at
the
> >> >> beginning, then do the file copying, and show Pasting Completed at
the
> >> >> end?
> >> >> Just to see what would happen, I removed the last "Pasted Completed"
> >> >> line and ran it. The run method did all its work and then showed
> >> >> "Pasting Started" when it was done. Anyway, not sure why setMessage
> >> >> seems to be called last no matter where it is in the program flow.
Any
> >> >> suggestions? Thanks,
> >> >>
> >> >>
> >> >> pasteAction = new Action(){
> >> >> public void run(){
> >> >>
> >> >>
> > getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> >> >> Started");
> >> >>
> >> >> // do some work that could take a while
> >> >>
> >> >>
> > getViewSite().getActionBars().getStatusLineManager().setMess age( "Pasting
> >> >> Completed");
> >> >>
> >> >>
> >> >> }
> >> >>
> >> >> };
> >> >>
> >>
> >>
> >>
> >>
>
>
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