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ItemList support center_on_current().

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This commit is contained in:
jinyangcruise 2025-11-15 11:30:39 +08:00
parent d5edd4a592
commit c82b5fe2ec
3 changed files with 43 additions and 2 deletions
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31
scene/gui/item_list.cpp
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@ -1182,6 +1182,36 @@ void ItemList::ensure_current_is_visible() {
queue_redraw();
}
void ItemList::center_on_current(bool p_center_verically, bool p_center_horizontally) {
if (current < 0 || current >= items.size()) {
return;
}
ERR_FAIL_COND_MSG(!p_center_verically && !p_center_horizontally, "At least one of the parameters must be true.");
Rect2 r = items[current].rect_cache;
if (p_center_verically) {
int from_v = scroll_bar_v->get_value();
int to_v = from_v + scroll_bar_v->get_page();
int item_center_y = r.position.y + r.size.y / 2;
int viewport_center_y = (from_v + to_v) / 2;
int offset_y = item_center_y - viewport_center_y;
scroll_bar_v->set_value(scroll_bar_v->get_value() + offset_y);
}
if (p_center_horizontally) {
int from_h = scroll_bar_h->get_value();
int to_h = from_h + scroll_bar_h->get_page();
int item_center_x = r.position.x + r.size.x / 2;
int viewport_center_x = (from_h + to_h) / 2;
int offset_x = item_center_x - viewport_center_x;
scroll_bar_h->set_value(scroll_bar_h->get_value() + offset_x);
}
}
static Rect2 _adjust_to_max_size(Size2 p_size, Size2 p_max_size) {
Size2 size = p_max_size;
int tex_width = p_size.width * size.height / p_size.height;
@ -2370,6 +2400,7 @@ void ItemList::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_item_at_position", "position", "exact"), &ItemList::get_item_at_position, DEFVAL(false));
ClassDB::bind_method(D_METHOD("ensure_current_is_visible"), &ItemList::ensure_current_is_visible);
ClassDB::bind_method(D_METHOD("center_on_current", "center_verically", "center_horizontally"), &ItemList::center_on_current, DEFVAL(true), DEFVAL(true));
ClassDB::bind_method(D_METHOD("get_v_scroll_bar"), &ItemList::get_v_scroll_bar);
ClassDB::bind_method(D_METHOD("get_h_scroll_bar"), &ItemList::get_h_scroll_bar);