mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-14 06:42:58 +08:00
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
#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_mu(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;
|
|
lv_obj_t* parent = lv_obj_get_parent(currentButton);
|
|
uint_fast32_t i = lv_obj_get_child_id(currentButton);
|
|
if (i > 0) {
|
|
lv_obj_swap(parent->spec_attr->children[i], parent->spec_attr->children[i - 1]);
|
|
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void event_handler_dn(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;
|
|
lv_obj_t* parent = lv_obj_get_parent(currentButton);
|
|
uint_fast32_t i = lv_obj_get_child_id(currentButton);
|
|
if (i < lv_obj_get_child_cnt(parent) - 1) {
|
|
lv_obj_swap(parent->spec_attr->children[i], parent->spec_attr->children[i + 1]);
|
|
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 < 30; 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, LV_SYMBOL_UP, "Up");
|
|
lv_obj_add_event_cb(btn, event_handler_mu, 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);
|
|
}
|
|
|
|
#endif
|