Swing performance
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Posted By:   Lun_Xiao
Posted On:   Friday, October 26, 2001 02:09 PM

I draw 10000 squares using Java2D on a panel and add this panel to a scroll
pane. When the scroll pane is scroll,
it is very slow to react. I think it
is because of the repaint of the
10000 squares. How can I solve this
problem? Thanks.

Re: Swing performance

Posted By:   Christopher_Brind  
Posted On:   Saturday, October 27, 2001 06:01 AM

a couple of options spring to mind:


1. in your panel's constructor draw your squares to an off-screen image then just draw the entire image.


2. work out of from the view which sqaures you actually need to draw and only draw the ones you need to.

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