Project: Grab and a x11-window in realtime
 
** Brief description
   Implement a java component for grabbing a X11-window and move it 
   dynamically on top of a JPanel.
   
** Usecase
	Our JAVA Swing Application has to start a native x11 program. This program
	create a X11-window (like xterm, xclock, firefox, ..) independent to our
	Swing application. To get a better look and feel, we would like to make
	this window dependent to our application by moving it dynamically 
	and in real time exactly above a special JPanel. 
	So, the user does not know about the external program.
	 
	  
** Description
	Implementing a java component which grabs a defined windows (e.g. by window name)
	from the current X11-display and move it dynamically and in real time
	exactly at the top of a special JPanel component. Moving the JPanel should also 
	move the x11-window.
	  

** Requirements
- Create Swing application with a JFrame f1 and JPanel p1 inside the JFrame
- find an existing X11 window w1 by one of the defined characteristic: 
	- x11 windows title
	- X11 windows id
	
- requirements for JPanel p1 and Windows w1 
	- JPanel p1 is always as large as window w1, means scale to the size of window w1 
	  dynamically in real time
	- X11 window w1 is always on top of JPanel p1, means it will hide JPanel p1 
	  dynamically in real time

- to fit this requirements  
	- resize the JPanel p1 always to fit the size of w1
	- move the x11 window w1 always on top of JPanel p1
	- if JFrame f1 moves, move window w1 also
	- if windows w1 moves, move it back to fit the requirements
	- if windows w1 grows or shirks, JPanel p1 should also resize
	- ... ??
	
- Set size (width, high) of the x11 windows w1 

- Set position (x,y) of the x11 windows w1 
 	
- Get Information about the target windows w1 like	
	- windows title, id, size, position
		
- the program should also work independent of any running x11 
  window manager (none, kde, fvwm, ..)

- It should be possible to enable/disable this automatic resizing/movement of the 
  the window w1.

- if window w1 disappears (e.g. because of terminated x11 application), 
  the "WindowDisappear" listeners should be called. These listeners are registered
  on startup
 
- additional requirements in abstract DynamicX11Panel.java class
  	

** Interesting links for X11 windows management	
http://stackoverflow.com/questions/288512/resizing-a-window-to-a-set-size-in-linux
http://www.sweb.cz/tripie/utils/wmctrl/