Odo began as an attempt to write my own odometer, a counter of how much distance you travel with the mouse-cursor on screen. Since this kind of data takes some time to collect, I was more interested in when I did how much with the mouse. Later I added a keystroke-counter and a link to a local database, to be able to look up my history of activity. The graph displays the measured values with a combination of colors, at one minute per horizontal pixel: Upper graph: Green: Horzontal mouse movement; Red: Vertical mouse movement. Lower graph: Green: Keystrokes; Red: Mouseclicks; Blue: Application switches. Since these are the basic colors, overlapping dispay results in different colors: red and green make yellow, blue and green make light-blue (cyan), blue and red make purple (magenta), and all three make white.
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