title: Mouse Event on inner jpanel placed on another jpanel
body: <p>I have one JPanel container in the background, which will move on mouse drag. </p>
  
  <p>I have small inner jpanels placed on different parts of the background container. On each inner jpanels i have a line drawn on it. I want to show a menu only when they click on the lines in the inner panel, clicking on other places in the inner panel should be forwarded to the background panel.</p>
  
  <p>Please help me how to do that.</p>
  
  <p>Thanks.</p>