1 #include "../../lv_examples.h"
2 #if LV_USE_ROLLER && LV_FONT_MONTSERRAT_22 && LV_BUILD_EXAMPLES
3
event_handler(lv_event_t * e)4 static void event_handler(lv_event_t * e)
5 {
6 lv_event_code_t code = lv_event_get_code(e);
7 lv_obj_t * obj = lv_event_get_target(e);
8 if(code == LV_EVENT_VALUE_CHANGED) {
9 char buf[32];
10 lv_roller_get_selected_str(obj, buf, sizeof(buf));
11 LV_LOG_USER("Selected value: %s", buf);
12 }
13 }
14
15 /**
16 * Roller with various alignments and larger text in the selected area
17 */
lv_example_roller_2(void)18 void lv_example_roller_2(void)
19 {
20 /*A style to make the selected option larger*/
21 static lv_style_t style_sel;
22 lv_style_init(&style_sel);
23 lv_style_set_text_font(&style_sel, &lv_font_montserrat_22);
24
25 const char * opts = "1\n2\n3\n4\n5\n6\n7\n8\n9\n10";
26 lv_obj_t * roller;
27
28 /*A roller on the left with left aligned text, and custom width*/
29 roller = lv_roller_create(lv_scr_act());
30 lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
31 lv_roller_set_visible_row_count(roller, 2);
32 lv_obj_set_width(roller, 100);
33 lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
34 lv_obj_set_style_text_align(roller, LV_TEXT_ALIGN_LEFT, 0);
35 lv_obj_align(roller, LV_ALIGN_LEFT_MID, 10, 0);
36 lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
37 lv_roller_set_selected(roller, 2, LV_ANIM_OFF);
38
39 /*A roller on the middle with center aligned text, and auto (default) width*/
40 roller = lv_roller_create(lv_scr_act());
41 lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
42 lv_roller_set_visible_row_count(roller, 3);
43 lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
44 lv_obj_align(roller, LV_ALIGN_CENTER, 0, 0);
45 lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
46 lv_roller_set_selected(roller, 5, LV_ANIM_OFF);
47
48 /*A roller on the right with right aligned text, and custom width*/
49 roller = lv_roller_create(lv_scr_act());
50 lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
51 lv_roller_set_visible_row_count(roller, 4);
52 lv_obj_set_width(roller, 80);
53 lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
54 lv_obj_set_style_text_align(roller, LV_TEXT_ALIGN_RIGHT, 0);
55 lv_obj_align(roller, LV_ALIGN_RIGHT_MID, -10, 0);
56 lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
57 lv_roller_set_selected(roller, 8, LV_ANIM_OFF);
58 }
59
60 #endif
61
