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GEF in RAP repaints the whole SWT canvas on any update [message #876961]

Fri, 25 May 2012 15:46

Xihui Chen

Messages: 35
Registered: June 2011

Member

When I monitor the network traffic of my GEF application on RAP, I found that even a small repaint on a figure in GEF editor will also transfer the painting info for all other figures in the editor even they don't need to be updated at all. I think this is big problem since it will heavily affect the GEF performance on RAP.

Could this problem be resolved?

Thanks!

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Re: GEF in RAP repaints the whole SWT canvas on any update [message #877057 is a reply to message #876961]

Fri, 25 May 2012 20:08

Xihui Chen

Messages: 35
Registered: June 2011

Member

Looks like the reason is that in RAP the redraw() method of swt.widgets.Control ignored the rectangle region and just redraw the whole control whenever it is needed:

public void redraw( int x, int y, int width, int height, boolean all ) {
checkWidget();
if( width > 0 && height > 0 ) {
internalSetRedraw( true );
}
}

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Re: GEF in RAP repaints the whole SWT canvas on any update [message #878547 is a reply to message #877057]

Tue, 29 May 2012 14:03

Xihui Chen

Messages: 35
Registered: June 2011

Member

Can anyone help to look at this and point to me if this could be solved? This is really important to me because it is the performance bottleneck for my project.

Thank you!

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