Handling Title Tips With Drag/Drop Headers Using The Visual C++ 6.0 CListCtrl

I wanted to add the title-tip class to the new version of the CListCtrl in Visual C++ 6.0. However, as has previously been pointed out on this site, the code doesn’t quite work for a List Control with the LVS_EX_HEADERDRAGDROP style enabled. The code fix previously posted is more complicated than neccessary with the new CListCtrl class in VC 6, and I was able to modify Zafir Anjum’s CellRectFromPoint() function to handle all header cases simply. Just modify the CellRectFromPoint() code to look like the following:


int CTRListCtrl::CellRectFromPoint(CPoint & point, RECT * cellrect, int * col)
{
	int colnum;

	// Make sure that the ListView is in LVS_REPORT
	if( (GetStyle() & LVS_TYPEMASK) != LVS_REPORT )
		return -1;

	// Get the top and bottom row visible	
	int row = GetTopIndex();
	int bottom = row + GetCountPerPage();
	if( bottom > GetItemCount() )
		bottom = GetItemCount();

	// Get the number of columns
	CHeaderCtrl* pHeader = CListCtrl::GetHeaderCtrl();
	int nColumnCount = pHeader->GetItemCount();

	// Loop through the visible rows
	for( ;row <= bottom; row++)
	{
		// Get bounding rect of item and check whether point falls in it.		
		CRect rect;
		GetItemRect( row, &rect, LVIR_BOUNDS );

		// We use the rects of the header items to determine if the point falls in a
		// given column. Thus, the order of the columns is no longer important.

		CRect colRect;

		if( rect.PtInRect(point) )
		{
			// Now find the column			
			for( colnum = 0; colnum < nColumnCount; colnum++ )
			{
				pHeader->GetItemRect(colnum, &colRect);

				if(  (point.x >= colRect.left) && (point.x <= (colRect.left + colRect.Width()) ) )
				{
					// Found the column
					RECT rectClient;
					GetClientRect( &rectClient );
					if( point.x > rectClient.right )
						return -1;

					if( col )
						*col = colnum;

					rect.right = colRect.left + colRect.Width();
					rect.left = colRect.left;

					if( rect.right > rectClient.right )
						rect.right = rectClient.right;

					*cellrect = rect;
					return row;
				}
			}
		}
	}
	return -1;
}


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