layout();
layout(false);
public void setContent(Control content) {	checkWidget();	if (this.content != null && !this.content.isDisposed()) {		this.content.removeListener(SWT.Resize, contentListener);		this.content.setBounds(new Rectangle(-200, -200, 0, 0));		}		this.content = content;	ScrollBar vBar = getVerticalBar ();	ScrollBar hBar = getHorizontalBar ();	if (this.content != null) {		if (vBar != null) {			vBar.setMaximum (0);			vBar.setThumb (0);			vBar.setSelection(0);		}		if (hBar != null) {			hBar.setMaximum (0);			hBar.setThumb (0);			hBar.setSelection(0);		}		content.setLocation(0, 0);		layout();		this.content.addListener(SWT.Resize, contentListener);	} else {		if (hBar != null) hBar.setVisible(alwaysShowScroll);		if (vBar != null) vBar.setVisible(alwaysShowScroll);	}}