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feat(table): scroll to the selected cell with key navigation

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Fixes https://forum.lvgl.io/t/grid-navigation-with-automatic-scrolling-for-table/10285
This commit is contained in:
Gabor Kiss-Vamosi 2022-11-16 11:32:00 +01:00
parent 4c90ec54d7
commit 5e1c415a76
1 changed files with 26 additions and 0 deletions
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26
src/widgets/table/lv_table.c
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@ -42,6 +42,7 @@ static lv_res_t get_pressed_cell(lv_obj_t * obj, uint16_t * row, uint16_t * col)
static size_t get_cell_txt_len(const char * txt);
static void copy_cell_txt(char * dst, const char * txt);
static void get_cell_area(lv_obj_t * obj, uint16_t row, uint16_t col, lv_area_t * area);
static void scroll_to_selected_cell(lv_obj_t * obj);
static inline bool is_cell_empty(void * cell)
{
@ -516,6 +517,7 @@ static void lv_table_event(const lv_obj_class_t * class_p, lv_event_t * e)
if(col == LV_TABLE_CELL_NONE || row == LV_TABLE_CELL_NONE) {
table->col_act = 0;
table->row_act = 0;
scroll_to_selected_cell(obj);
lv_obj_invalidate(obj);
return;
}
@ -560,6 +562,8 @@ static void lv_table_event(const lv_obj_class_t * class_p, lv_event_t * e)
table->row_act = row;
lv_obj_invalidate(obj);
scroll_to_selected_cell(obj);
res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, NULL);
if(res != LV_RES_OK) return;
}
@ -1006,4 +1010,26 @@ static void get_cell_area(lv_obj_t * obj, uint16_t row, uint16_t col, lv_area_t
}
static void scroll_to_selected_cell(lv_obj_t * obj)
{
lv_table_t * table = (lv_table_t *)obj;
lv_area_t a;
get_cell_area(obj, table->row_act, table->col_act, &a);
if(a.x1 < 0) {
lv_obj_scroll_by_bounded(obj, -a.x1, 0, LV_ANIM_ON);
}
else if(a.x2 > lv_obj_get_width(obj)) {
lv_obj_scroll_by_bounded(obj, lv_obj_get_width(obj) - a.x2, 0, LV_ANIM_ON);
}
if(a.y1 < 0) {
lv_obj_scroll_by_bounded(obj, 0, -a.y1, LV_ANIM_ON);
}
else if(a.y2 > lv_obj_get_height(obj)) {
lv_obj_scroll_by_bounded(obj, 0, lv_obj_get_height(obj) - a.y2 , LV_ANIM_ON);
}
}
#endif