Stroke based input system for character input

摘要

An improved handheld electronic device includes an input apparatus, preferably a trackball, an output apparatus, namely a display, and a processor apparatus. The processor apparatus is structured to execute a number of routines including a stroke-based input user interface routine. The stroke-based input user interface routine is structured to present a user interface on the display. The user interface includes an active portion, a filter portion and an output portion.