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  • 1 Post By novacain

api listview - finding subitem clicked

This is a discussion on api listview - finding subitem clicked within the Windows Programming forums, part of the Platform Specific Boards category; I've got a listview using no column header, report, single select, and full row select styles. The column data is ...

  1. #1
    Casual Visitor
    Join Date
    Oct 2001
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    350

    api listview - finding subitem clicked

    I've got a listview using no column header, report, single select, and full row select styles. The column data is occupied by a single character and is 20px wide; each row can contain similar values, so searching for a specified value isn't feasible.

    Is there a function to determine which subitem a user has clicked on? I can find the selected row, but I'm just not sure how I'd go about finding the column. ListView_GetSelectedColumn seemed promising, but it always returns 0.

    I'm looking to find both the row and col by index pos.

    Code:
    case WM_NOTIFY :
    
    	if(((LPNMHDR)lParam)->code == NM_CLICK) {
    		
    		int index = SendMessage(hndListV, LVM_GETNEXTITEM, -1, LVNI_SELECTED);
                    // need help finding the subitem
    				
           }
    
    break;
    Any ideas would be greatly appreciated.

  2. #2
    'Allo, 'Allo, Allo
    Join Date
    Apr 2008
    Posts
    611
    This might help. As it mentions the structure has members for item, subitem and where the click was. That and/or LVM_SUBITEMHITTEST should get you somewhere.

  3. #3
    Casual Visitor
    Join Date
    Oct 2001
    Posts
    350
    Thank you for the reply; I sure appreciate your time.

    I tried it out but couldn't get what I was looking for. I'm still trying to learn the basics, so I probably goofed it up somewhere. I did come up with something using a chimp approach that *appears* to work.

    Code:
    if(((LPNMHDR)lParam)->code == NM_CLICK) {
    				
        int index = SendMessage(hndListV, LVM_GETNEXTITEM, -1, LVNI_SELECTED);
        POINT pt = { 0 };
        LVITEM lvi;
    
        GetCursorPos(&pt);
        ScreenToClient(hndListV, &pt);
    
        ZeroMemory(&lvi, sizeof(LVITEM));
    
        lvi.iItem = index;       
        lvi.iSubItem = pt.x / 14;  // 14 is the cx member of the LVCOLUMN structure
        ...
    }

  4. #4
    train spotter
    Join Date
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    Something like...

    Code:
    NMITEMACTIVATE  NMItem = {0};
    int row = -1, column = -1;
    
    if(((LPNMHDR)lParam)->code == NM_CLICK) 
    { 
         NMItem = (LPNMITEMACTIVATE) lParam;
         //row clicked is the item member 
         row = NMItem.iItem;
         //column clicked is subitem
         column = NMItem.iSubItem;
    }
    ronin likes this.
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  5. #5
    Casual Visitor
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    novacain, thank you immensely; it does exactly what I wanted.

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