Win32 Listview Tilemode Interactable Item Space Question - c++

Question

When custom painting a listview item in tileview, returning CDRF_SKIPDEFAULT during CDDS_ITEMPREPAINT enlarges the interactable rect of the item to the size of the actual item (i.e. the size received from ListView_GetItemRect(LVIR_BOUNDS)) instead of only the size of icon+label. How and why does this happen exactly? I couldn't find a clear answer in the docs or on the web. I mean, shouldn't handling custom paint only affect the painting of the item and not the way you interact with it?
Codesample:
::NMLVCUSTOMDRAW* pNMCustomDraw = reinterpret_cast<NMLVCUSTOMDRAW*>(pNMHDR);
switch (pNMCustomDraw->nmcd.dwDrawStage)
{
// Before the painting cycle begins.
case CDDS_PREPAINT:
{
return CDRF_NOTIFYITEMDRAW;
}
// Before an item is drawn.
case CDDS_ITEMPREPAINT:
{
return CDRF_SKIPDEFAULT;
}
}
Visual representation of the question:

Answer 1

The line case CDDS_ITEM | CDDS_PREPAINT is checking the result value of "or'ing" CDDS_ITEM | CDDS_PREPAINT. plus, you already checked CDDS_PREPAINT above. Shouldn't it be CDDS_ITEMPREPAINT ?
It should be like this, probably:
switch (pNMCustomDraw->nmcd.dwDrawStage)
{
// Before the painting cycle begins.
case CDDS_PREPAINT:
{
return CDRF_NOTIFYITEMDRAW;
}
// Before an item is drawn.
case CDDS_ITEM: // fall through
case CDDS_ITEMPREPAINT:
{
return CDRF_SKIPDEFAULT;
}
}
Plus, MSDN states that:
CDRF_SKIPDEFAULT The application drew the item manually. The control
will not draw the item. This occurs when dwDrawStage equals
CDDS_ITEMPREPAINT.
in https://learn.microsoft.com/en-us/windows/win32/controls/nm-customdraw-list-view
check here as well (MSDN):
https://learn.microsoft.com/en-us/windows/win32/api/commctrl/ns-commctrl-nmcustomdraw
Try that :). And don't forget to add breaks if needed after cases. Greetings