QTreeView 按照指定深度展开

QTreeView 按照指定深度展开

代码

void expandToDepth(QTreeView *treeView, const QModelIndex &index, int depth) {
		if (depth <= 0) {
			return;
		}

		// 展开当前节点
		treeView->expand(index);

		// 获取当前节点的子节点数量
		QAbstractItemModel *model = treeView->model();
		int rowCount = model->rowCount(index);

		// 递归展开子节点
		for (int row = 0; row < rowCount; ++row) {
			QModelIndex childIndex = model->index(row, 0, index);
			expandToDepth(treeView, childIndex, depth - 1);
		}
	}