[LVGL] How to draw a rectangle using LVGL?

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Drawing simple objects in LVGL seems hard, I was trying to do that a few weeks ago, figured I was going to have to write code for things like rectangle, circle etc. Here’s one test I did.


lv_obj_t *
drawRectangle( int x, int y, int width, int height, lv_color_t color ) {
  lv_obj_t * obj1 = lv_obj_create(lv_scr_act(), NULL);

  lv_style_t *style1 = (lv_style_t *)malloc( sizeof( lv_style_t ));
  lv_style_copy(style1, &lv_style_plain_color);    /*Copy a built-in style to initialize the new style*/
  style1->body.empty = 1;
  style1->body.border.color = color;
  style1->body.border.width = 1;
  style1->body.border.part = LV_BORDER_FULL;

  lv_obj_set_style(obj1, style1);
  lv_obj_set_pos(obj1, x, y);
  lv_obj_set_size(obj1, width, height);

  return obj1;
}

void opcontrol() {
  lv_obj_t *obj = drawRectangle( 20, 20, 100, 100, LV_COLOR_YELLOW);


  while (true) {
    pros::delay(20);
  }
}