flickering of image in SWT

I am building an SWT application, I have used a ScrolledComposite and a Composite inside that. This has a few more buttons and checkboxes . All this is inside a Composite.

Now I tried to put this main composite in the tab. It worked fine but the image flickers a lot even if I don't scroll or resize. If I put this main composite inside a shell, its working perfect without any flicker.

Why is this开发者_高级运维 happening?

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Did you set the SWT.DOUBLE_BUFFERED style bit on your Composite? That might fix it.

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Write SWT.DOUBLE_BUFFERED in declaration

Example:

scrolledComposite = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.DOUBLE_BUFFERED);