Eclipse Community Forums: Rich Client Platform (RCP)

Home » Eclipse Projects » Rich Client Platform (RCP) » Runnable asynExec

Fri, 12 January 2007 10:22

Eclipse User

Is there beside the busyIndicator any difference in the way these
runnables are executed in a RCP application ?

getSite().getShell().getDisplay().asyncExec(new Runnable() {
public void run() {
treeViewer.refresh();
}
});

BusyIndicator.showWhile(Display.getCurrent(), new Runnable() {
public void run() {
treeViewer.refresh();
}
});

Re: Runnable asynExec [message #461571 is a reply to message #461569]

Fri, 12 January 2007 10:47

Eclipse User

Hi,

usually you use the asyncExec in this context

PlatformUI.getWorkbench().getDisplay.asyncExec(*);

in order to execute some code in the UI Thread.
Maybe you read some data or so in another thread and you want to update some
GUI elements,
then you have to use the asyncExec(*) or the syncExec(*) to get access to
the main UI thread, as far as I know.

Greetz,
Carsten

"pigna" <pijnmar@hotmail.com> schrieb im Newsbeitrag
news:598d1f7011e2020a69c29174d1b8cc83$1@www.eclipse.org...
> Is there beside the busyIndicator any difference in the way these
> runnables are executed in a RCP application ?
>
> getSite().getShell().getDisplay().asyncExec(new Runnable() {
> public void run() {
> treeViewer.refresh();
> }
> });
>
>
> BusyIndicator.showWhile(Display.getCurrent(), new Runnable() {
> public void run() {
> treeViewer.refresh(); }
> });

Re: Runnable asynExec [message #461573 is a reply to message #461569]

Fri, 12 January 2007 12:31

Eclipse User

Yes, a big difference:

pigna wrote:
> Is there beside the busyIndicator any difference in the way these
> runnables are executed in a RCP application ?
>

This one is executed asynchronously on the display thread. If you are
currently on the display thread, then the execution is deferred until
the main event loop is re-entered.

> getSite().getShell().getDisplay().asyncExec(new Runnable() {
> public void run() {
> treeViewer.refresh();
> }
> });
>
>

This is executed synchronously (it uses Display.syncExec(), meaning it
will run as if you had no wrapper.

> BusyIndicator.showWhile(Display.getCurrent(), new Runnable() {
> public void run() {
> treeViewer.refresh(); }
> });

Re: Runnable asynExec [message #461620 is a reply to message #461573]

Sat, 13 January 2007 16:30

Eclipse User

Thank you both for your answers. Learning every day :-)

So if I'm correct if you a scenario where three viewers need simultaneous
update one should go for solution one. Or is there even a better way?

The asyncExec does not change cursor to wait as seconds example did. How
can I achieve same behaviour cursor wise?

Previous Topic:	[Newbie] View notification
Next Topic:	removing annoying coolbar actionsets

Goto Forum:

-=] Back to Top [=-

Current Time: Mon Mar 17 01:08:03 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter