Disable a control in SWT

DisableControl.java

public void switchDisableOfControl(Control control,boolean flag){
  	if (control instanceof Composite) {
			Composite comp = (Composite) control;
			for (Control c : comp.getChildren())
				switchDisableOfControl(c, flag);
		} else {
			control.setEnabled(flag);
			//text
			if(control instanceof Text){
				((Text) control).setText("");
				((Text) control).setBackground(flag ? null : Display.getDefault().getSystemColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));//
			}
		}
	}