I set up a class that extends JFrame and implements MouseListener.  The
class displays  a graph, and when the graph is clicked with the mouse
it zooms into the spot that was clicked.    The problem is that the
method I call to zoom can have multiple frames, but when calling the
zoom method from the mousepressed method, only the last frame is ever
repainted.  When I call the same zoom method from main, each frame is
repainted fine.