private static class HeaderContribution extends ContributionItem {
        // when creating/switching perspectives we are not allowed to
        // re-create the header contribution because
        // of the bad hacks that are done to get the image on the top
        private boolean created = false;

        @Override
        public void fill(CoolBar parent, int index) {
            if (created) {
                return;
            }
            created = true;

            GridLayout gl = new GridLayout(1, false);
            gl.marginWidth = 0;
            gl.marginHeight = 0;
            Composite logo = new Composite(parent.getParent(), SWT.NO_FOCUS);

            // Some more hack to get it before a coolbar
            parent.getParent().setLayout(gl);
            final Shell s = new Shell();
            s.setText("ApplicationActionBar");
            parent.setParent(s);

            final GridData gd = new GridData(SWT.FILL, SWT.NONE, true, false);
            gd.heightHint = 22;
            gd.verticalIndent = 0;
            gd.horizontalIndent = 0;
            logo.setLayoutData(gd);
            GridLayout rl = new GridLayout(1, false);
            rl.marginHeight = 0;
            rl.marginWidth = 0;
            rl.horizontalSpacing = 0;
            rl.verticalSpacing = 0;
            rl.marginTop = 3;
            rl.marginRight = 15;

            logo.setLayout(rl);
            logo.setBackground(ColorHandler.getSchaeferYellow());

            final Label icon = new Label(logo, SWT.FLAT);

            icon.setBackground(logo.getBackground());
            icon.setImage(ImageProvider.getImage(getLogoDescriptor()));
            final GridData igd = new GridData(SWT.RIGHT, SWT.CENTER, true, false);
            igd.horizontalIndent = 0;
            igd.verticalIndent = 0;
            icon.setLayoutData(igd);

            parent.setParent(logo.getParent());
            parent.setLayoutData(new GridData(SWT.FILL, SWT.NONE, false, false));
        }

        private ImageDescriptor getLogoDescriptor() {
            ...
        }
    }