Abstract: The method of generating an image in the form of a disc portion on a display, the disc portion comprising a center and a maximum radius defining a limit of the image generated, the disc portion comprising a plurality of angular sectors, each angular sector comprising a plurality of disjoint areas, each disjoint area of an angular sector being delimited by two circular arcs defined between two radii, and each disjoint area being called a “ring”, is characterized in that it comprises: a first step of selecting a ring, a second step of comparing the area of the ring with at least one predefined value, dubbed the grain, a third step of generating the image of the ring as a function of the result of the comparison, a fourth step of incrementing the next ring to be selected.

Abstract: The method of generating an image in the form of a disc portion on a display, the disc portion comprising a centre and a maximum radius defining a limit of the image generated, the disc portion comprising a plurality of angular sectors, each angular sector comprising a plurality of disjoint areas, each disjoint area of an angular sector being delimited by two circular arcs defined between two radii, and each disjoint area being called a “ring”, is characterized in that it comprises: a first step of selecting a ring, a second step of comparing the area of the ring with at least one predefined value, dubbed the grain, a third step of generating the image of the ring as a function of the result of the comparison, a fourth step of incrementing the next ring to be selected.

Abstract: The field of the invention is that of man-machine interface devices for viewing screen (1), said screen being able to display graphical objects (10) called “widgets”, said interface device making it possible to carry out the operations of navigating, selecting and activating said graphical objects (10), the device comprising at least: a computer (2) linked to the viewing screen (1), the computer generating on the screen a virtual designation element called a focus, said focus being able to be positioned on the entirety of the graphical objects (10); a keyboard (4) linked to the computer and comprising function keys: navigation keys make it possible to move the focus upwards, downwards, to the right and to the left of the screen, a so-called activation key making it possible to select or activate the graphical object designated by the focus; a so-called cancel key making it possible to deselect or deactivate the graphical object selected by the focus.