win32: Unable to catch NMDOWN command in ListView

Question

Hi,

I'm trying to make a table-like experience from ListView win32. I was trying to achieve reordering the items in ListView. So I wanted to catch the left mouse button down on a row, so I tried NM_LDOWN like this

case WM_NOTIFY:  
    lpNMHeader = (LPNMHDR)pLParam;  
    switch (lpNMHeader->code)  
    {  
          case NM_RELEASEDCAPTURE:  
          {  
           }  
          break;  
         case NM_LDOWN:  
         {  
            // do somethig  
          }  
          break;  
    }  

I was able to catch NM_RELEASEDCAPTURE but was not able to catch NM_CLICK on ListView's items. And this windowProc belongs to the ListView's parent window.

Answer 1

I needed experience where I can drag and drop an item.

Drag&Drop is done with LVN_BEGINDRAG
(then ImageList_Create, ImageList_AddMasked(), ImageList_BeginDrag(), ImageList_DragEnter(), SetCapture(),
then ImageList_DragMove on WM_MOUSEMOVE, etc...)
(I had adapted the MS sample with TreeView from old KB214814)

Answer 2

ListViews use NM_CLICK :

case WM_NOTIFY:  
	{  
		LPNMHDR lpnmhdr;  
		lpnmhdr = (LPNMHDR)lParam;  
		switch (lpnmhdr->code)  
		{  
		case NM_CLICK:  
		{  
			LPNMITEMACTIVATE lpnmiact;  
			lpnmiact = (LPNMITEMACTIVATE)lParam;  
			// Click on first column of item  
			if (lpnmiact->iSubItem == 0)  
			{  
				WCHAR wsMessage[255] = L"";  
				wsprintf(wsMessage, L"Item  : %d\n", lpnmiact->iItem);  
				MessageBox(NULL, wsMessage, L"Information", MB_OK | MB_ICONINFORMATION);			  
			}  
		}  
		break;  
		}  
		return FALSE;  
	}  
	break;