QAbstractItemModel: how to correctly remove item and recalculate indexes?

如何正确删除项目并重新计算指标？

youdao

Each product has three links after it so we can see how the product looks when we display it, edit the item, or remove it.

每个产品后面都有三个链接，这样我们可以在显示产品、编辑项，或删除它时看到产品的样子。

youdao

You can use this dialog later to remove or reassign the default Work Item type.

您可以利用接下来的对话，来移除，或重新分配默认的Work Item种类。

youdao

If shoppers scan an unwanted item by accident, they simply select "Remove" from the menu option, scan the item again, and it is removed from the cart.

WSJ: Mobile Checkout Devices Let People Scan and They Shop