Created attachment 3821 screenshot for xfce4-panel well make the top and bottom of the panel and activate it there. the middle area does not activate the panel and the panel is hidden when the cursor moves by 50 pixels Thanks you video my panel xfce4-panel http://www.youtube.com/watch?v=vuID8xsoj_o and screenshot
video panel and annotations http://www.youtube.com/watch?v=8Pg6EEOzxEM
Not going to implement this since it adds too much overhead to monitor the position of other windows.