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Flickering panels in SWT_AWT bridge solved! [message #650991]

Thu, 27 January 2011 12:08

Marcel Austenfeld

Messages: 160
Registered: July 2009

Senior Member

Hello,

i recently wrote about a problem which occured after the introduction of the Java plattform >1.6.07.
See bug:
Bug 91157 - embedded SWT_AWT frames flicker when the SWT window is resized :
https://bugs.eclipse.org/bugs/show_bug.cgi?id=91157

Swing panels embedded with the swt_awt bridge were flickering for example if a resize event occurs. With Java <=1.6.07 no flickering occured. Today i changed the snippet:

http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.swt.sn ippets/src/org/eclipse/swt/snippets/Snippet154.java?view=co

after i read this article again:
http://www.eclipse.org/articles/article.php?file=Article-Swi ng-SWT-Integration/index.html

I integrated a JApplet as a root container and the flickering dissapeared (tested only under Windows!).

.......
try {
System.setProperty("sun.awt.noerasebackground", "true");
} catch (NoSuchMethodError error) {
}

/* Create and setting up frame */
Frame frame = SWT_AWT.new_Frame(composite);
JApplet panel = new JApplet() {
public void update(java.awt.Graphics g) {
/* Do not erase the background */
paint(g);
}
};
frame.add(panel);
JRootPane root = new JRootPane();
panel.add(root);
java.awt.Container contentPane = root.getContentPane();
...........

I hope this information will be a help for people using the swt_awt bridge.

Apropos:

Let me know if this works also under Linux or MacOSX

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Re: Flickering panels in SWT_AWT bridge solved! [message #651016 is a reply to message #650991]

Thu, 27 January 2011 13:06

Daniel KrÃ¼gler

Messages: 853
Registered: July 2009

Senior Member

On 2011-01-27 13:08, Marcel wrote:
> i recently wrote about a problem which occured after the introduction of
> the Java plattform >1.6.07.
> See bug:
> Bug 91157 - embedded SWT_AWT frames flicker when the SWT window is
> resized :
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=91157
>
> Swing panels embedded with the swt_awt bridge were flickering for
> example if a resize event occurs. With Java <=1.6.07 no flickering
> occured. Today i changed the snippet:
>
> http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.swt.sn ippets/src/org/eclipse/swt/snippets/Snippet154.java?view=co
>
>
> after i read this article again:
> http://www.eclipse.org/articles/article.php?file=Article-Swi ng-SWT-Integration/index.html
>
>
> I integrated a JApplet as a root container and the flickering
> dissapeared (tested only under Windows!).

Let me add to this the following information: Personally, I strongly
recommend to use as a higher-level bridge the albireo library

http://wiki.eclipse.org/Albireo_Project

instead of using the SWT_AWT bridge directly: We use this library
successfully since more than a year and I won't return: It contains much
more fixes than above single issue.

Greetings from Bremen,

Daniel Krügler

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Re: Flickering panels in SWT_AWT bridge solved! [message #651024 is a reply to message #651016]

Thu, 27 January 2011 13:40

Marcel Austenfeld

Messages: 160
Registered: July 2009

Senior Member

Hello Daniel,

indeed i use parts of the Albireo project but this project seems to be abondened so i'm interested in the official supported way to use the swt_awt API.
However i did not know that they actually did integrate a solution for the flickering. Have you tested it with the latest Java versions and under different OS environments?

My intention to post this information:
It is hard to find information about the right use of the bridge and the snippets on the internet have to be corrected for the latest java versions. Since 2004 i'm struggeling with the swt_awt bridge under Window and Linux. Hopefully more fixes will be available in the future.

Greetings from Kiel

Marcel

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Re: Flickering panels in SWT_AWT bridge solved! [message #652970 is a reply to message #650991]

Mon, 07 February 2011 19:15

Marcel Austenfeld

Messages: 160
Registered: July 2009

Senior Member

Some additional information:

On Linux (Ubuntu) everything works fine, too.

On MacOSX the problem is still existent.

Furthermore on MacOSX annoying lock errors occur:

...[NSConditionLock unlock]: lock (<NSConditionLock: 0x143cc0> '(null)') unlocked when not locked
.....

[Updated on: Mon, 07 February 2011 19:15]

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Re: Flickering panels in SWT_AWT bridge solved! [message #1122536 is a reply to message #652970]

Tue, 01 October 2013 17:25

Marcel Austenfeld

Messages: 160
Registered: July 2009

Senior Member

The problem seems to be fixed using Java 1.7.40. The first time in my RCP history i have no flickering panels under Mac, Linux and Windows with the swt_awt bridge.

[Updated on: Tue, 01 October 2013 18:50]

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