Question

I am using a List Control to display a representation of elements within a vector. When the list is clicked on another control shows information about that element. The index of the element is currently determined by its index in the control, however if I wish to sort or filter the results this will no longer work.

I have been told that I could use a virtual list control, but the MSDN is not very friendly, can someone run me through how I could use a virtual list control for this?

Answer 1

Frankly – tying data (the position in your data vector) to the presentation of the data in the list control (the position in the list ctrl) is something I would stay away from.

In MFC each control has a ‘Data’ DWORD member variable – when coding in MFC I Always called ‘SetItemData’ for each item added and passed in a pointer that the relevant row referred to e.g. YourListCtrl.SetItemData((DWORDPTR)&YourData);

Then when the ListCtrl item is selected, you just call

DataTypeYouWant* pData = (DataTypeYouWant*)(YourListCtrl.GetItemData(indexofselecteditem));

Or somesuch thing.

Alternatively – if you don’t want to use pointers – hold the index of the item in your original vector in the itemdata for your row (just pass it into the above fns).