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added lv_obj_move_up() and lv_obj_move_down() (#2467)

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* - small with unneeded lv_obj_invalidate()  fix in lv_obj_move_foreground() and lv_obj_move_background()

- added lv_obj_move_up() and lv_obj_move_down()
- used new functions in sample 2
- used lv_obj_swap() to shuffle (turn around) list

* solved build error

* added top and bottom buttons in sample
This commit is contained in:
Karijn Wessing
2021-08-24 14:30:38 +02:00
committed by GitHub
parent 6a5c0b4a70
commit e111ea2a62
6 changed files with 131 additions and 18 deletions
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81
examples/widgets/list/lv_example_list_2.c
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@@ -1,3 +1,5 @@
#include <stdio.h>
#include "../../lv_examples.h"
#if LV_USE_LIST && LV_BUILD_EXAMPLES
@@ -39,18 +41,25 @@ static void event_handler(lv_event_t* e)
}
}
static void event_handler_mu(lv_event_t* e)
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;
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);
}
lv_obj_move_up(currentButton);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
@@ -60,11 +69,45 @@ static void event_handler_dn(lv_event_t* 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);
lv_obj_move_down(currentButton);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_bottom(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_foreground(currentButton);
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
static void event_handler_swap(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) || (code == LV_EVENT_LONG_PRESSED_REPEAT))
{
uint32_t first = 0;
uint32_t last = lv_obj_get_child_cnt(list1);
if (last > 1)
{
last--;
while (first < last)
{
lv_obj_t* obj1 = lv_obj_get_child(list1, first);
lv_obj_t* obj2 = lv_obj_get_child(list1, last);
lv_obj_swap(obj1, obj2);
first++;
last--;
}
if (currentButton != NULL)
{
lv_obj_scroll_to_view(currentButton, LV_ANIM_ON);
}
}
}
}
@@ -98,13 +141,25 @@ void lv_example_list_2(void)
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_mu, LV_EVENT_ALL, NULL);
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_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