[news.eclipse.platform.swt] Re: About widgetSelected

[Matthew Hall <matthall@xxxxxxxxxxxxxxxxx>]

Lazytiger wrote:
> Hello everyone,
>     I have a problem when I want to update a label in a widgetSelected 
> method, what I found is this update only take effect after this method 
> invoked. But I want to do serveral thing in this method and the label shows 
> the status as a status bar.

Use Control.update() to force repaint the control.

>     And I also can't use UI component in a thread, How can I hanle these 
> things?
>     Thanks very much! 

Use Display.syncExec(Runnable) or Display.asyncExec(Runnable) and put 
the code to update your widgets in the Runnable.  The syncExec method 
returns after the Runnable has completely run, whereas the asyncExec 
just puts the runnable on the event queue and returns immediately. 
Unless there are specific timing issues, asyncExec is probably your best 
choice.

Matthew