update jpanel with event handling

CHANGELOG.txt

@@ -1,3 +1,6 @@
+0.28_dev
+-update jpanel with event handling that registers appropriate mouse position.
+
 0.27    2015-04-12
 -update font to enhance fonts access.
 -update image load to allow file-like argument.

display.py

@@ -19,7 +19,7 @@
 __docformat__ = 'restructuredtext'
 
 
-class Frame(JFrame, MouseListener, MouseMotionListener, MouseWheelListener, KeyListener):
+class Frame(JFrame):
 
     def __init__(self, title, size):
         JFrame.__init__(self, title)
@@ -31,10 +31,21 @@ def __init__(self, title, size):
         self.jpanel = Panel(size)
         self.getContentPane().add(self.jpanel)
         self.pack()
+
+
+class Panel(JPanel, MouseListener, MouseMotionListener, MouseWheelListener, KeyListener):
+
+    def __init__(self, size):
+        JPanel.__init__(self)
+        self.setPreferredSize(Dimension(size[0],size[1]))
+        self.surface = pyj2d.surface.Surface(size, BufferedImage.TYPE_INT_RGB)
+        self.setBackground(Color.BLACK)
         self.addMouseListener(self)
         self.addMouseMotionListener(self)
         self.addMouseWheelListener(self)
         self.addKeyListener(self)
+        self.setFocusable(True)
+        self.requestFocusInWindow()
         self.event = pyj2d.event
         self.modKey = pyj2d.event.modKey
 
@@ -80,15 +91,6 @@ def keyReleased(self, event):
     def keyTyped(self, event):
         pass
 
-
-class Panel(JPanel):
-
-    def __init__(self, size):
-        JPanel.__init__(self)
-        self.setPreferredSize(Dimension(size[0],size[1]))
-        self.surface = pyj2d.surface.Surface(size, BufferedImage.TYPE_INT_RGB)
-        self.setBackground(Color.BLACK)
-
     def paintComponent(self, g2d):
         self.super__paintComponent(g2d)
         g2d.drawImage(self.surface, 0, 0, None)