  Guided by the analogy to Mie scattering of light on small particles we show
that the propagation of a Dirac-electron wave in graphene can be manipulated by
a circular gated region acting as a quatum dot. Large dots enable electron
lensing, while for smaller dots resonant scattering entails electron
confinement in quasibound states. Forward scattering and Klein tunneling can be
almost switched off for small dots by a Fano resonance arising from the
interference between resonant scattering and the background partition.
