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SWT Browser Separate Process [message #1391323]

Mon, 30 June 2014 19:25

Dennis S

Messages: 3
Registered: May 2014

Junior Member

I'm using the SWT browser to load up a massive AngularJS application. While the performance of the app can be argued what happens is the browser takes from 2 - 14 seconds to load.

Because the browser operates on the UI thread, the UI completely locks up. Are there any known solutions to say run the browser in a separate process or thread?

I display a message alerting the user that the window may freeze for a moment or two, but on Ubuntu it seems the window manager thinks the process has failed, greys the window out and asks to force quit the application. So, essentially, I can't use my application in Linux.

Any ideas?

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Re: SWT Browser Separate Process [message #1392353 is a reply to message #1391323]

Wed, 02 July 2014 07:50

Niraj Modi

Messages: 48
Registered: November 2013

Member

Hi Dennis,
Instead of using a message alerting the user, try displaying busy cursor during long running task, refer below snippet:
http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet130.java

Longer running tasks should be moved to non-UI thread using: Display#asyncExec(Runnable runnable)

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Re: SWT Browser Separate Process [message #1392553 is a reply to message #1392353]

Wed, 02 July 2014 13:55

David Wegener

Messages: 1445
Registered: July 2009

Senior Member

Display.asyncExec does not move long running tasks to a non-UI thread. It allows non-UI threads to update SWT controls. Passing a long running task to asyncExec will lock up your application.

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Re: SWT Browser Separate Process [message #1393383 is a reply to message #1392553]

Thu, 03 July 2014 18:12

Dennis S

Messages: 3
Registered: May 2014

Junior Member

Thank you both of you. I didn't realize that asyncExec would allow SWT controls to update, which is exactly what I was looking for. This has helped me immensely. Thanks to the both of you, this has truly saved a bunch!

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