acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_checkbox_2.c (2793B)
      1 #include "../../lv_examples.h"
      2 #if LV_USE_CHECKBOX && LV_BUILD_EXAMPLES
      3 
      4 static lv_style_t style_radio;
      5 static lv_style_t style_radio_chk;
      6 static uint32_t active_index_1 = 0;
      7 static uint32_t active_index_2 = 0;
      8 
      9 static void radio_event_handler(lv_event_t * e)
     10 {
     11     uint32_t * active_id = lv_event_get_user_data(e);
     12     lv_obj_t * cont = lv_event_get_current_target(e);
     13     lv_obj_t * act_cb = lv_event_get_target(e);
     14     lv_obj_t * old_cb = lv_obj_get_child(cont, *active_id);
     15 
     16     /*Do nothing if the container was clicked*/
     17     if(act_cb == cont) return;
     18 
     19     lv_obj_clear_state(old_cb, LV_STATE_CHECKED);   /*Uncheck the previous radio button*/
     20     lv_obj_add_state(act_cb, LV_STATE_CHECKED);     /*Uncheck the current radio button*/
     21 
     22     *active_id = lv_obj_get_index(act_cb);
     23 
     24     LV_LOG_USER("Selected radio buttons: %d, %d", (int)active_index_1, (int)active_index_2);
     25 }
     26 
     27 
     28 static void radiobutton_create(lv_obj_t * parent, const char * txt)
     29 {
     30     lv_obj_t * obj = lv_checkbox_create(parent);
     31     lv_checkbox_set_text(obj, txt);
     32     lv_obj_add_flag(obj, LV_OBJ_FLAG_EVENT_BUBBLE);
     33     lv_obj_add_style(obj, &style_radio, LV_PART_INDICATOR);
     34     lv_obj_add_style(obj, &style_radio_chk, LV_PART_INDICATOR | LV_STATE_CHECKED);
     35 }
     36 
     37 /**
     38  * Checkboxes as radio buttons
     39  */
     40 void lv_example_checkbox_2(void)
     41 {
     42     /* The idea is to enable `LV_OBJ_FLAG_EVENT_BUBBLE` on checkboxes and process the
     43      * `LV_EVENT_CLICKED` on the container.
     44      * A variable is passed as event user data where the index of the active
     45      * radiobutton is saved */
     46 
     47 
     48     lv_style_init(&style_radio);
     49     lv_style_set_radius(&style_radio, LV_RADIUS_CIRCLE);
     50 
     51     lv_style_init(&style_radio_chk);
     52     lv_style_set_bg_img_src(&style_radio_chk, NULL);
     53 
     54     uint32_t i;
     55     char buf[32];
     56 
     57     lv_obj_t * cont1 = lv_obj_create(lv_scr_act());
     58     lv_obj_set_flex_flow(cont1, LV_FLEX_FLOW_COLUMN);
     59     lv_obj_set_size(cont1, lv_pct(40), lv_pct(80));
     60     lv_obj_add_event_cb(cont1, radio_event_handler, LV_EVENT_CLICKED, &active_index_1);
     61 
     62     for(i = 0; i < 5; i++) {
     63         lv_snprintf(buf, sizeof(buf), "A %d", (int)i + 1);
     64         radiobutton_create(cont1, buf);
     65 
     66     }
     67     /*Make the first checkbox checked*/
     68     lv_obj_add_state(lv_obj_get_child(cont1, 0), LV_STATE_CHECKED);
     69 
     70     lv_obj_t * cont2 = lv_obj_create(lv_scr_act());
     71     lv_obj_set_flex_flow(cont2, LV_FLEX_FLOW_COLUMN);
     72     lv_obj_set_size(cont2, lv_pct(40), lv_pct(80));
     73     lv_obj_set_x(cont2, lv_pct(50));
     74     lv_obj_add_event_cb(cont2, radio_event_handler, LV_EVENT_CLICKED, &active_index_2);
     75 
     76     for(i = 0; i < 3; i++) {
     77         lv_snprintf(buf, sizeof(buf), "B %d", (int)i + 1);
     78         radiobutton_create(cont2, buf);
     79     }
     80 
     81     /*Make the first checkbox checked*/
     82     lv_obj_add_state(lv_obj_get_child(cont2, 0), LV_STATE_CHECKED);
     83 }
     84 
     85 
     86 #endif