SolarOS 4.13.4 manual · job

graffiti

Full-screen Palm Graffiti handwriting input for boards with absolute touch and PSRAM. The job does not draw an overlay or change the active application.

job start graffiti
job status graffiti
job stop graffiti

The pen-down position chooses the recognition alphabet for the complete stroke. Start in the left two-thirds of the oriented display for letters, or in the right one-third for numbers. The boundary follows the current display orientation. Relative pointer sources are ignored.

The recognizer implements the $1 unistroke pipeline with Palm Graffiti 1 alphabet and numeral templates. It preserves stroke direction so a downward vertical stroke can be I or 1, while an upward vertical stroke is Shift. The Palm editing gestures are also available:

Stroke	Result
Upward vertical	Shift; repeat before a character for Caps Lock.
Left to right	Space.
Right to left	Backspace.
Upper right to lower left	Enter.

While running, the job registers the pointer-observer resource. It observes absolute pointer events over the whole display but does not consume them, so the foreground application continues to receive the same press, move, and release events. Recognized characters are published by a virtual keyboard source named graffiti and therefore go to the current input focus. job status graffiti reports recognized, rejected, and dropped stroke counts plus the current case state.