Get style property in a given state?

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1

Hello,

I’m trying to get the default bg-color of a pressed button.

The example on line 35 in lvgl/src/lv_core/lv_obj_style_dec.h suggests that I could use lv_obj_get_style_local_bg_color() for this. But the compiler complains that no such function exists.

What am I missing here?

2

(cc @kisvegabor)

I think the example in that header file is wrong. As far as I know there has never been a way to do this for the local style.

3

lv_obj_get_style_local_bg_color is really not not exists.

However, it seems you need lv_obj_get_style_bg_color because it considers all the add styles and the local style too. If you need to get the final color of a state different than a current one you need to put the object manually into that state and disable style transitions.

  lv_obj_t * btn = lv_btn_create(lv_scr_act(), NULL);
  
  lv_state_t state_ori = btn->state;
  btn->state = LV_STATE_PRESSED;
  btn->style_list.skip_trans = 1;
  lv_color_t color = lv_obj_get_style_bg_color(btn, LV_BTN_PART_MAIN);
  btn->state = state_ori;
  btn->style_list.skip_trans = 0;
4

So I have a button with a given color. The color indicates the current state of some real-world object. I’ configured the default state, the pressed state, and any other state I can possibly configure for this button to this color.

Now I’d like to open a popup-menu when this button is pressed and indicate this color in some way in this popup.

Unfortunately, when I press the button, the color changes to some other color which I’ve never set in any way. So my popup gets NOT the color I configured for the button for all the states I could imagine. Right after I’m done creating the popup, the button reverts to the configured color.

5

You probably tried this already, but on the off-chance that you didn’t… have you set the color for the (admittedly not intuitive) combination LV_STATE_PRESSED | LV_STATE_FOCUSED?