gdk:device-axis-value (device axes axis-label)

device -- a gdk:device object for a pointer device
axes -- a list of double float for the axes
label -- a string with the axis label

The double float with the found value, or nil.

Interprets a list of double floats as axis values for a given device, and locates the value in the array for a given axis label, as returned by the gdk:device-list-axes function.