What is the Event type for LV_EVENT_DRAW_PART_END equivalent ?

[vortex314]

Referring to this call : https://github.com/lvgl/lvgl/blob/630da9c6cac169a294b6be3d2d95a49a4133ce00/examples/widgets/table/lv_example_table_2.c#L84

    /*Add an event callback to to apply some custom drawing*/
    lv_obj_add_event_cb(table, draw_event_cb, LV_EVENT_DRAW_PART_END, NULL);

As this looks the way to to custom coloring of the table rows. The Rust code doesn't seem to receive these kind of events.

[nia-e]

Implemented in #126, sorry it took so long 😓

[vortex314]

Is the below code the correct way to receive these events ? As I didn't see the events LV_EVENT_DRAW_PART_END arriving when the table is shown.

 table.on_event(|mut _table, _event| match _event {
        Event::ValueChanged => {
            let (row, col) = _table.get_selected_cell().unwrap();
            if row == 0 {
                match col {
                    0 => sorting = Sorting::OnTopic,
                    1 => sorting = Sorting::OnValue,
                    2 => sorting = Sorting::OnCount,
                    3 => sorting = Sorting::OnTime,
                    _ => {}
                }
                info!("Sorting on {:?}", sorting);
                send.send(Message::Refresh).unwrap();
            }
        }
        _ => {
            info!("Event {:?}", _event);
        }
    })?;

Or is there an alternate way to reach the same as the C code to filter on certain events :

    /*Add an event callback to to apply some custom drawing*/
    lv_obj_add_event(table, draw_part_event_cb, LV_EVENT_DRAW_PART_BEGIN, NULL);

[nia-e]

In this case you probably want

table.on_event(|mut table, event| match event {
    // Replace as necessary
    Event::DrawPartBegin => { /* ... */ }
    Event::DrawPartEnd => { /* ... */ }
})?;

These new variants on Event were implemented in the PR linked above and correspond to LV_EVENT_DRAW_PART_BEGIN, etc. See the PR for which exact variants were added

[vortex314]

Strange. Maybe the latest version was not downloaded. As I recompiled now without changing the code, I got the events as expected. Thanks !

2023-05-16 22:06:44.655 INFO lv_1::view - Event DrawPartBegin
2023-05-16 22:06:44.655 INFO lv_1::view - Event DrawPartEnd
2023-05-16 22:06:44.655 INFO lv_1::view - Event DrawPartBegin
2023-05-16 22:06:44.655 INFO lv_1::view - Event DrawPartEnd
2023-05-16 22:06:44.655 INFO lv_1::view - Event DrawPartBegin

[vortex314]

Looks I'm stuck to match C to Rust for the below part. Do I need revert to lvgl_sys calls ?

static void draw_part_event_cb(lv_event_t * e)
{
    lv_obj_t * obj = lv_event_get_target(e);
    lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e);
    /*If the cells are drawn...*/
    if(dsc->part == LV_PART_ITEMS) {
        uint32_t row = dsc->id /  lv_table_get_col_cnt(obj);
        uint32_t col = dsc->id - row * lv_table_get_col_cnt(obj);

        /*Make the texts in the first cell center aligned*/
        if(row == 0) {
            dsc->label_dsc->align = LV_TEXT_ALIGN_CENTER;
            dsc->rect_dsc->bg_color = lv_color_mix(lv_palette_main(LV_PALETTE_BLUE), dsc->rect_dsc->bg_color, LV_OPA_20);
            dsc->rect_dsc->bg_opa = LV_OPA_COVER;
        }
        /*In the first column align the texts to the right*/
        else if(col == 0) {
            dsc->label_dsc->align = LV_TEXT_ALIGN_RIGHT;
        }

        /*MAke every 2nd row grayish*/
        if((row != 0 && row % 2) == 0) {
            dsc->rect_dsc->bg_color = lv_color_mix(lv_palette_main(LV_PALETTE_GREY), dsc->rect_dsc->bg_color, LV_OPA_10);
            dsc->rect_dsc->bg_opa = LV_OPA_COVER;
        }
    }
}

[nia-e]

What specific functionality is missing? Can you file a separate issue so I can make a PR and link to it?

[vortex314]

Ok, I will. Thanks.