gnome-control-center/capplets/screensaver/screensavers/qix.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="qix" _label="Qix (solid)">
    <command arg="-root"/>
    <hgroup>
        <select id="shape">
	    <option id="lines" _label="Lines" 
                    enable="trail_type,width" arg-set="-poly 2"/>
	    <option id="poly" _label="Polygons" 
                    enable="no_pts" test="poly > 2"/>
        </select>
        <number id="no_pts" _label="Number of points:" 
                type="spinbutton" low="3" high="16" default="3"
		arg="-poly %"/>
    </hgroup>
    <select id="trail_type">
	<option id="discrete" _label="Discrete Lines" enable="spread"/>
	<option id="solid" _label="Solid Trails" 
	        arg-set="-solid" test="solid and not (transparent or xor)"/>
	<option id="transparent" _label="Transparent Trails" 
		arg-set="-solid -transparent" test="solid and transparent"/>
	<option id="xor" _label="XOR Trails" 
		arg-set="-solid -xor" test="solid and xor"/>
    </select>
    <boolean id="gravity" _label="Trails attract each other" 
             arg-set="-gravity" test="gravity"/>
    <number id="speed" _label="Speed" _low-label="Slow" _high-label="Fast" 
            type="slider" low="0" high="20000" default="10000" arg="-delay %" 
            from-cli-conv="20000 - var" to-cli-conv="20000 - var"/>
    <number id="length" _label="Length" _low-label="Short" _high-label="Long" 
            type="slider" low="0" high="1000" default="50" arg="-segments %"/>
    <number id="width" _label="Width" _low-label="Narrow" _high-label="Wide" 
            type="slider" low="0" high="1000" default="100" arg="-size %"/>
    <number id="spread" _label="Spread between lines" 
            _low-label="Short" _high-label="Long" 
            type="slider" low="0" high="30" default="8" arg="-spread %"/>
    <number id="count" _label="Number of trails:" 
            type="spinbutton" low="1" high="100" default="1" arg="-count %"/>
    <select id="use_color">
	<option id="color" _label="Full Color" enable="shift"/>
	<option id="mono" _label="Monochrome" arg-set="-mono" test="mono"/>
    </select>
    <number id="shift" _label="Color contrast" 
            _low-label="Low" _high-label="High" 
            type="slider" low="0" high="25" default="3" arg="-color-shift %"/>
    <_description>This is the swiss army chainsaw of qix programs.  It bounces a series of line segments around the screen, and uses variations on this basic motion pattern to produce all sorts of different presentations: line segments, filled polygons, overlapping translucent areas...  Written by Jamie Zawinski.</_description>
    <fake name="Qix (transparent)"/>
    <fake name="Qix (linear)"/>
    <fake name="Qix (xor)"/>
</screensaver>