line meter實現進度圈

• 任務回調函數

  
  void line_meter_task(lv_task_t* t)
  {
      static uint8_t progress;
      lv_obj_t* lmeter = t->user_data;
  
      progress += 10;
      if (progress == 100)
      {
          progress = 0;
      }
      lv_lmeter_set_value(lmeter, progress);
  }
  

• line meter進度實現

  void line_meter_demo(void)
  {
      /*Create a style for the line meter*/
      static lv_style_t style_lmeter;
      lv_style_copy(&style_lmeter, &lv_style_pretty_color);
      style_lmeter.line.width = 4;
      style_lmeter.line.color = LV_COLOR_RED;
      style_lmeter.body.main_color = lv_color_hex(0x91bfed);
      style_lmeter.body.grad_color = lv_color_hex(0x04386c);
      style_lmeter.body.padding.left = 16;
  
      /*Create a line meter*/
      lv_obj_t* lmeter;
      lmeter = lv_lmeter_create(lv_scr_act(), NULL);
      lv_lmeter_set_range(lmeter, 0, 100);
      lv_lmeter_set_value(lmeter, 50);
      lv_lmeter_set_scale(lmeter, 360, 31);
  
      lv_lmeter_set_style(lmeter, LV_LMETER_STYLE_MAIN,&style_lmeter);
      lv_obj_set_size(lmeter, 150, 150);
      lv_obj_align(lmeter, NULL, LV_ALIGN_CENTER, 0, 0);
     
      lv_task_t* t = lv_task_create(line_meter_task, 200, LV_TASK_PRIO_MID, lmeter);
      lv_task_ready(t);
  
  }

• 調用line_meter_demo函數,編譯運行