PixLoader, responsive ui widget displays a waiting progress indecator while calling a Future.
by defining duration you define a time cycle in milliseconds for the animation to complete, the default value
is 1000 milliseconds to complete one cycle,
faceColor reconstruct the appearance Color of the loader, when specified.
PixLoader will fit the boundries to meet your design needs by setting
widthRationfrom 0.0 to 1.0. [...]