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lv_example_list_2.c
169 lines (141 loc) · 5.27 KB
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lv_example_list_2.c
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#include <stdlib.h>
#include "../../lv_examples.h"
#if LV_USE_LIST && LV_BUILD_EXAMPLES
static lv_obj_t * list1;
static lv_obj_t * list2;
static lv_obj_t * currentButton = NULL;
static void event_handler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
if(code == LV_EVENT_CLICKED) {
LV_LOG_USER("Clicked: %s", lv_list_get_btn_text(list1, obj));
if(currentButton == obj) {
currentButton = NULL;
}
else {
currentButton = obj;
}
lv_obj_t * parent = lv_obj_get_parent(obj);
uint32_t i;
for(i = 0; i < lv_obj_get_child_cnt(parent); i++) {
lv_obj_t * child = lv_obj_get_child(parent, i);
if(child == currentButton) {
lv_obj_add_state(child, LV_STATE_CHECKED);
}
else {
lv_obj_clear_state(child, LV_STATE_CHECKED);
}
}
}
}
static void event_handler_top(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
if(code == LV_EVENT_CLICKED) {
if(currentButton == NULL) return;
lv_obj_move_background(currentButton);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_up(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
if(currentButton == NULL) return;
uint32_t index = lv_obj_get_index(currentButton);
if(index <= 0) return;
lv_obj_move_to_index(currentButton, index - 1);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_center(lv_event_t * e)
{
const lv_event_code_t code = lv_event_get_code(e);
if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
if(currentButton == NULL) return;
lv_obj_t * parent = lv_obj_get_parent(currentButton);
const uint32_t pos = lv_obj_get_child_cnt(parent) / 2;
lv_obj_move_to_index(currentButton, pos);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_dn(lv_event_t * e)
{
const lv_event_code_t code = lv_event_get_code(e);
if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
if(currentButton == NULL) return;
const uint32_t index = lv_obj_get_index(currentButton);
lv_obj_move_to_index(currentButton, index + 1);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_bottom(lv_event_t * e)
{
const lv_event_code_t code = lv_event_get_code(e);
if(code == LV_EVENT_CLICKED) {
if(currentButton == NULL) return;
lv_obj_move_foreground(currentButton);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_swap(lv_event_t * e)
{
const lv_event_code_t code = lv_event_get_code(e);
// lv_obj_t* obj = lv_event_get_target(e);
if((code == LV_EVENT_CLICKED) || (code == LV_EVENT_LONG_PRESSED_REPEAT)) {
uint32_t cnt = lv_obj_get_child_cnt(list1);
for(int i = 0; i < 100; i++)
if(cnt > 1) {
lv_obj_t * obj = lv_obj_get_child(list1, rand() % cnt);
lv_obj_move_to_index(obj, rand() % cnt);
if(currentButton != NULL) {
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
}
}
void lv_example_list_2(void)
{
/*Create a list*/
list1 = lv_list_create(lv_scr_act());
lv_obj_set_size(list1, lv_pct(60), lv_pct(100));
lv_obj_set_style_pad_row(list1, 5, 0);
/*Add buttons to the list*/
lv_obj_t * btn;
int i;
for(i = 0; i < 15; i++) {
btn = lv_btn_create(list1);
lv_obj_set_width(btn, lv_pct(50));
lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);
lv_obj_t * lab = lv_label_create(btn);
lv_label_set_text_fmt(lab, "Item %d", i);
}
/*Select the first button by default*/
currentButton = lv_obj_get_child(list1, 0);
lv_obj_add_state(currentButton, LV_STATE_CHECKED);
/*Create a second list with up and down buttons*/
list2 = lv_list_create(lv_scr_act());
lv_obj_set_size(list2, lv_pct(40), lv_pct(100));
lv_obj_align(list2, LV_ALIGN_TOP_RIGHT, 0, 0);
lv_obj_set_flex_flow(list2, LV_FLEX_FLOW_COLUMN);
btn = lv_list_add_btn(list2, NULL, "Top");
lv_obj_add_event_cb(btn, event_handler_top, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
btn = lv_list_add_btn(list2, LV_SYMBOL_UP, "Up");
lv_obj_add_event_cb(btn, event_handler_up, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
btn = lv_list_add_btn(list2, LV_SYMBOL_LEFT, "Center");
lv_obj_add_event_cb(btn, event_handler_center, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
btn = lv_list_add_btn(list2, LV_SYMBOL_DOWN, "Down");
lv_obj_add_event_cb(btn, event_handler_dn, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
btn = lv_list_add_btn(list2, NULL, "Bottom");
lv_obj_add_event_cb(btn, event_handler_bottom, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
btn = lv_list_add_btn(list2, LV_SYMBOL_SHUFFLE, "Shuffle");
lv_obj_add_event_cb(btn, event_handler_swap, LV_EVENT_ALL, NULL);
lv_group_remove_obj(btn);
}
#endif