Standard Widget Runtime

Physically proven standard LVGL families, semantic themes and generated API direction.

Physically proven widget families

—Led, Bar, Arc, Chart and Table
—Keyboard, Calendar, Scale, Roller, Message Box and Button Matrix
—Input, Textarea, Checkbox, Switch and Radio
—Progress, CircularProgress, NumberInput and Select
—List and TabView

Proven Widget Pipeline

A widget reaches PROVEN only after the Official LVGL Reference, authoritative Widget Registry, Tray, Canvas, Inspector, Browser Preview, native export, Runtime SDK where applicable, 95_UserEvents for genuine interaction, live firmware, Standalone Export, ESP32-P4 physical validation and documentation agree.

Generated API model

Interactive semantic widgets use guarded FG_Set_<Name>_* setters and call FG_On_<Name>_* only for genuine user interaction. Output-only widgets expose setters without user hooks. Presentation-only elements remain API-free.

FG_Set_Progress_Value(72);
FG_Add_Data_Chart_Point(42);
FG_Clear_Data_Chart();

void FG_On_Switch_Changed(bool checked)
{
    // Queue product behaviour; keep the LVGL callback lightweight.
}

Semantic theme parity

Supported widgets consume the shared semantic palette across Canvas, Browser Preview and generated LVGL. The selected theme is exported; runtime theme switching on ESP32-P4 is not claimed.