1 #include "../../lv_examples.h"
2 #if LV_USE_LIST && LV_BUILD_EXAMPLES
3
4 static lv_obj_t * list1;
5 static lv_obj_t * list2;
6
7 static lv_obj_t * currentButton = NULL;
8
event_handler(lv_event_t * e)9 static void event_handler(lv_event_t * e)
10 {
11 lv_event_code_t code = lv_event_get_code(e);
12 lv_obj_t * obj = lv_event_get_target(e);
13 if(code == LV_EVENT_CLICKED) {
14 LV_LOG_USER("Clicked: %s", lv_list_get_button_text(list1, obj));
15
16 if(currentButton == obj) {
17 currentButton = NULL;
18 }
19 else {
20 currentButton = obj;
21 }
22 lv_obj_t * parent = lv_obj_get_parent(obj);
23 uint32_t i;
24 for(i = 0; i < lv_obj_get_child_count(parent); i++) {
25 lv_obj_t * child = lv_obj_get_child(parent, i);
26 if(child == currentButton) {
27 lv_obj_add_state(child, LV_STATE_CHECKED);
28 }
29 else {
30 lv_obj_remove_state(child, LV_STATE_CHECKED);
31 }
32 }
33 }
34 }
35
event_handler_top(lv_event_t * e)36 static void event_handler_top(lv_event_t * e)
37 {
38 lv_event_code_t code = lv_event_get_code(e);
39 if(code == LV_EVENT_CLICKED) {
40 if(currentButton == NULL) return;
41 lv_obj_move_background(currentButton);
42 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
43 }
44 }
45
event_handler_up(lv_event_t * e)46 static void event_handler_up(lv_event_t * e)
47 {
48 lv_event_code_t code = lv_event_get_code(e);
49 if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
50 if(currentButton == NULL) return;
51 uint32_t index = lv_obj_get_index(currentButton);
52 if(index <= 0) return;
53 lv_obj_move_to_index(currentButton, index - 1);
54 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
55 }
56 }
57
event_handler_center(lv_event_t * e)58 static void event_handler_center(lv_event_t * e)
59 {
60 const lv_event_code_t code = lv_event_get_code(e);
61 if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
62 if(currentButton == NULL) return;
63
64 lv_obj_t * parent = lv_obj_get_parent(currentButton);
65 const uint32_t pos = lv_obj_get_child_count(parent) / 2;
66
67 lv_obj_move_to_index(currentButton, pos);
68
69 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
70 }
71 }
72
event_handler_dn(lv_event_t * e)73 static void event_handler_dn(lv_event_t * e)
74 {
75 const lv_event_code_t code = lv_event_get_code(e);
76 if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
77 if(currentButton == NULL) return;
78 const uint32_t index = lv_obj_get_index(currentButton);
79
80 lv_obj_move_to_index(currentButton, index + 1);
81 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
82 }
83 }
84
event_handler_bottom(lv_event_t * e)85 static void event_handler_bottom(lv_event_t * e)
86 {
87 const lv_event_code_t code = lv_event_get_code(e);
88 if(code == LV_EVENT_CLICKED) {
89 if(currentButton == NULL) return;
90 lv_obj_move_foreground(currentButton);
91 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
92 }
93 }
94
event_handler_swap(lv_event_t * e)95 static void event_handler_swap(lv_event_t * e)
96 {
97 const lv_event_code_t code = lv_event_get_code(e);
98 // lv_obj_t* obj = lv_event_get_target(e);
99 if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
100 uint32_t cnt = lv_obj_get_child_count(list1);
101 for(int i = 0; i < 100; i++)
102 if(cnt > 1) {
103 lv_obj_t * obj = lv_obj_get_child(list1, lv_rand(0, cnt));
104 lv_obj_move_to_index(obj, lv_rand(0, cnt));
105 if(currentButton != NULL) {
106 lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
107 }
108 }
109 }
110 }
111
lv_example_list_2(void)112 void lv_example_list_2(void)
113 {
114 /*Create a list*/
115 list1 = lv_list_create(lv_screen_active());
116 lv_obj_set_size(list1, lv_pct(60), lv_pct(100));
117 lv_obj_set_style_pad_row(list1, 5, 0);
118
119 /*Add buttons to the list*/
120 lv_obj_t * btn;
121 int i;
122 for(i = 0; i < 15; i++) {
123 btn = lv_button_create(list1);
124 lv_obj_set_width(btn, lv_pct(50));
125 lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);
126
127 lv_obj_t * lab = lv_label_create(btn);
128 lv_label_set_text_fmt(lab, "Item %d", i);
129 }
130
131 /*Select the first button by default*/
132 currentButton = lv_obj_get_child(list1, 0);
133 lv_obj_add_state(currentButton, LV_STATE_CHECKED);
134
135 /*Create a second list with up and down buttons*/
136 list2 = lv_list_create(lv_screen_active());
137 lv_obj_set_size(list2, lv_pct(40), lv_pct(100));
138 lv_obj_align(list2, LV_ALIGN_TOP_RIGHT, 0, 0);
139 lv_obj_set_flex_flow(list2, LV_FLEX_FLOW_COLUMN);
140
141 btn = lv_list_add_button(list2, NULL, "Top");
142 lv_obj_add_event_cb(btn, event_handler_top, LV_EVENT_ALL, NULL);
143 lv_group_remove_obj(btn);
144
145 btn = lv_list_add_button(list2, LV_SYMBOL_UP, "Up");
146 lv_obj_add_event_cb(btn, event_handler_up, LV_EVENT_ALL, NULL);
147 lv_group_remove_obj(btn);
148
149 btn = lv_list_add_button(list2, LV_SYMBOL_LEFT, "Center");
150 lv_obj_add_event_cb(btn, event_handler_center, LV_EVENT_ALL, NULL);
151 lv_group_remove_obj(btn);
152
153 btn = lv_list_add_button(list2, LV_SYMBOL_DOWN, "Down");
154 lv_obj_add_event_cb(btn, event_handler_dn, LV_EVENT_ALL, NULL);
155 lv_group_remove_obj(btn);
156
157 btn = lv_list_add_button(list2, NULL, "Bottom");
158 lv_obj_add_event_cb(btn, event_handler_bottom, LV_EVENT_ALL, NULL);
159 lv_group_remove_obj(btn);
160
161 btn = lv_list_add_button(list2, LV_SYMBOL_SHUFFLE, "Shuffle");
162 lv_obj_add_event_cb(btn, event_handler_swap, LV_EVENT_ALL, NULL);
163 lv_group_remove_obj(btn);
164 }
165
166 #endif
167
