lv_draw_task_get_draw_dsc' was not declared

[nielseng2017]

LVGL version

9.1

What happened?

The environment is Arduino IDE 2.3.2 using a Cheap Yellow Display (CYD) ESP32. Successfully implement a screen with multiple lv_buttonmatrix, then tried to utilize the code from the "Custom Buttons" example in the lvgl documentation. I replicated the code for the second button to change the color of four buttons in my button matrix. The compilation errors our with: C:\Users\George\Documents\Arduino\Cheap_Yellow_Display_LVGL_FromScratch\Cheap_Yellow_Display_LVGL_FromScratch.ino: In function 'void event_handler_statematrix2(lv_event_t)': C:\Users\George\Documents\Arduino\Cheap_Yellow_Display_LVGL_FromScratch\Cheap_Yellow_Display_LVGL_FromScratch.ino:147:37: error: 'lv_draw_task_get_draw_dsc' was not declared in this scope; did you mean 'lv_draw_task_get_arc_dsc'? 147 | lv_draw_dsc_base_t base_dsc = lv_draw_task_get_draw_dsc(draw_task); //draw_task | ^~~~~~~~~ | lv_draw_task_get_arc_dsc

exit status 1

Compilation error: 'lv_draw_task_get_draw_dsc' was not declared in this scope; did you mean 'lv_draw_task_get_arc_dsc'?

How to reproduce?

static void event_handler_statematrix2(lv_event_t e) { lv_obj_t obj = (lv_obj_t)lv_event_get_target(e); // would not compile without (lv_obj_t) <<<<<<<<<< lv_draw_task_t draw_task = lv_event_get_draw_task(e); lv_draw_dsc_base_t base_dsc = lv_draw_task_get_draw_dsc(draw_task); //draw_task /When the button matrix draws the buttons.../ if(base_dsc->part == LV_PART_ITEMS) { bool pressed = false; if(lv_buttonmatrix_get_selected_button(obj) == base_dsc->id1 && lv_obj_has_state(obj, LV_STATE_PRESSED)) { pressed = true; }

    /*Change the draw descriptor of the 1st button*/
    if(base_dsc->id1 == 0) {
        lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
        if(fill_draw_dsc) {
            fill_draw_dsc->radius = 0;
            if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_GREEN, 3);
            else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_GREEN);
        }
        lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
        if(box_shadow_draw_dsc) {
            box_shadow_draw_dsc->width = 6;
            box_shadow_draw_dsc->ofs_x = 3;
            box_shadow_draw_dsc->ofs_y = 3;
        }
        lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
        if(label_draw_dsc) {
            label_draw_dsc->color = lv_color_white();
        }

    }
    /*Change the draw descriptor of the 2nd button*/
    else if(base_dsc->id1 == 1) {
         lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
        if(fill_draw_dsc) {
            fill_draw_dsc->radius = 0;
            if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_YELLOW, 3);
            else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_YELLOW);
        }
        lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
        if(box_shadow_draw_dsc) {
            box_shadow_draw_dsc->width = 6;
            box_shadow_draw_dsc->ofs_x = 3;
            box_shadow_draw_dsc->ofs_y = 3;
        }
        lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
        if(label_draw_dsc) {
            label_draw_dsc->color = lv_color_white();
        }
    }
    /*Change the draw descriptor of the 3rd button*/
    else if(base_dsc->id1 == 2) {
         lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
        if(fill_draw_dsc) {
            fill_draw_dsc->radius = 0;
            if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_RED, 3);
            else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_RED);
        }
        lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
        if(box_shadow_draw_dsc) {
            box_shadow_draw_dsc->width = 6;
            box_shadow_draw_dsc->ofs_x = 3;
            box_shadow_draw_dsc->ofs_y = 3;
        }
        lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
        if(label_draw_dsc) {
            label_draw_dsc->color = lv_color_white();
        }
    }
    /*Change the draw descriptor of the 4th button*/
    else if(base_dsc->id1 == 3) {
         lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
        if(fill_draw_dsc) {
            fill_draw_dsc->radius = 0;
            if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_BLUE, 3);
            else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_BLUE);
        }
        lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
        if(box_shadow_draw_dsc) {
            box_shadow_draw_dsc->width = 6;
            box_shadow_draw_dsc->ofs_x = 3;
            box_shadow_draw_dsc->ofs_y = 3;
        }
        lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
        if(label_draw_dsc) {
            label_draw_dsc->color = lv_color_white();
        }
    }
}

}

[lhdjply]

6742 The 9.1 documentation is incorrect; you can update to version 9.2 or wait for the 9.1 documentation to be fixed.

[kisvegabor]

Should be fixed when https://github.com/lvgl/lvgl/pull/6760 is merged

[kisvegabor]

The pr is merged and the v9.1 docs is correct now.