Method deselect_all

scene/gui/tree.cpp:5271–5293

}

void Tree::deselect_all() {
	if (root) {
		TreeItem *item = root;
		while (item) {
			if (select_mode == SELECT_ROW) {
				item->deselect(0);
			} else {
				for (int i = 0; i < columns.size(); i++) {
					item->deselect(i);
				}
			}
			TreeItem *prev_item = item;
			item = get_next_selected(root);
			ERR_FAIL_COND(item == prev_item);
		}
	}

	selected_item = nullptr;
	selected_col = -1;
	selected_button = -1;
	queue_accessibility_update();
	queue_redraw();
}

bool Tree::is_anything_selected() {
	return (selected_item != nullptr);