ListView get iGroupId and iGroup for ListViewItem

[mLipok]

_GUICtrlListView_GetItemGroupID() internall use _GUICtrlListView_GetItemEx() which useuses LVM_GETITEM to get LVITEMA structure from which iGroupId is taken.
So IGroupId is taken from ListView by ListViewItemIndex.

Quote

typedef struct tagLVITEMA {
  UINT   mask;
  int    iItem;
  int    iSubItem;
  UINT   state;
  UINT   stateMask;
  LPSTR  pszText;
  int    cchTextMax;
  int    iImage;
  LPARAM lParam;
  int    iIndent;
  int    iGroupId;
  UINT   cColumns;
  PUINT  puColumns;
  int    *piColFmt;
  int    iGroup;
} LVITEMA, *LPLVITEMA;

Question:
How to get iGroup by/for given ListViewItemIndex ?

I saw in https://learn.microsoft.com/en-us/windows/win32/api/commctrl/ns-commctrl-lvitema that:

Quote

This structure supersedes the LV_ITEM structure.

but how this should be used ?

Check the following testing snippet for: 

ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 0)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 0)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 1)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 1)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 2)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 2)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 3)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 3)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 4)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 4)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 5)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 5)[8] & @CRLF)

and entire example:

expandcollapse popup

#include <GUIConstantsEx.au3>
#include <GuiListView.au3>
#include <MsgBoxConstants.au3>
#include <StructureConstants.au3>

Example()

Func Example()
    GUICreate("ListView Get/Set Item Ex (v" & @AutoItVersion & ")", 400, 300)
    Local $idListview = GUICtrlCreateListView("", 2, 2, 394, 268)
    GUISetState(@SW_SHOW)

    ; Set ANSI format
;~     _GUICtrlListView_SetUnicodeFormat($idListview, False)

    ; Add columns
    _GUICtrlListView_AddColumn($idListview, "Items", 100)

    ; Add items
    GUICtrlCreateListViewItem("Item 0", $idListview)
    GUICtrlCreateListViewItem("Item 1", $idListview)
    GUICtrlCreateListViewItem("Item 2", $idListview)
    GUICtrlCreateListViewItem("Item 3", $idListview)
    GUICtrlCreateListViewItem("Item 4", $idListview)
    GUICtrlCreateListViewItem("Item 5", $idListview)

    _GUICtrlListView_EnableGroupView($idListview)
    Local $iGroupIndex_a = _GUICtrlListView_InsertGroup($idListview, -1, 22, "Group 2")
    ConsoleWrite("! $iGroupIndex_a = " & $iGroupIndex_a & @CRLF)
    Local $iGroupIndex_b = _GUICtrlListView_InsertGroup($idListview, -1, 123, "Group 1")
    ConsoleWrite("! $iGroupIndex_b = " & $iGroupIndex_b & @CRLF)

    _GUICtrlListView_SetItemGroupID($idListview, 0, 123)
    _GUICtrlListView_SetItemGroupID($idListview, 1, 123)
    _GUICtrlListView_SetItemGroupID($idListview, 2, 123)

    _GUICtrlListView_SetItemGroupID($idListview, 3, 22)
    _GUICtrlListView_SetItemGroupID($idListview, 4, 22)
    _GUICtrlListView_SetItemGroupID($idListview, 5, 22)

    ; Display Item 3 GroupId
    MsgBox($MB_SYSTEMMODAL, "Information", "Item 2 Group ID: " & _GUICtrlListView_GetItemGroupID($idListview, 2))

    ; Show item state
    Local $tItem = DllStructCreate($tagLVITEM)
    DllStructSetData($tItem, "Mask", BitOR($LVIF_GROUPID, $LVIF_IMAGE, $LVIF_INDENT, $LVIF_PARAM, $LVIF_STATE))
    DllStructSetData($tItem, "Item", 3)
    DllStructSetData($tItem, "StateMask", -1)
    _GUICtrlListView_GetItemEx($idListview, $tItem)

    #QUESTION => $tItem.Group ; why not works
    ConsoleWrite("- $tItem.Group = " & $tItem.Group & @CRLF)

    #QUESTION => why I Do Not see all elements from LVITEMA structure  ; https://learn.microsoft.com/en-us/windows/win32/api/commctrl/ns-commctrl-lvitema
    Local $aStruct = _WinAPI_StructToArray($tItem)
    ConsoleWrite("! _GUICtrlListView_GetItemGroupID($idListview, 3) = " & _GUICtrlListView_GetItemGroupID($idListview, 3) & @CRLF)

    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 0)[7] = " & _GUICtrlListView_GetItem($idListview, 0)[7] & @CRLF)
    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 1)[7] = " & _GUICtrlListView_GetItem($idListview, 1)[7] & @CRLF)
    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 2)[7] = " & _GUICtrlListView_GetItem($idListview, 2)[7] & @CRLF)
    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 3)[7] = " & _GUICtrlListView_GetItem($idListview, 3)[7] & @CRLF)
    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 4)[7] = " & _GUICtrlListView_GetItem($idListview, 4)[7] & @CRLF)
    ConsoleWrite("+ _GUICtrlListView_GetItem($idListview, 5)[7] = " & _GUICtrlListView_GetItem($idListview, 5)[7] & @CRLF)

    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 0)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 0)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 1)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 1)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 2)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 2)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 3)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 3)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 4)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 4)[8] & @CRLF)
    ConsoleWrite("! _GUICtrlListView_GetItem_mod($idListview, 5)[8] = " & _GUICtrlListView_GetItem_mod($idListview, 5)[8] & @CRLF)

    #QUESTION => $tItem.Text ; why not works ?
    _ArrayDisplay($aStruct, '$aStruct --- state = ' & $tItem.State & ' text = ' & $tItem.Text)

    ; Loop until the user exits.
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE
    GUIDelete()
EndFunc   ;==>Example

Func _GUICtrlListView_GetItem_mod($hWnd, $iIndex, $iSubItem = 0)
    Local $tItem = $__g_tListViewItem

    $tItem.Mask = BitOR($LVIF_GROUPID, $LVIF_IMAGE, $LVIF_INDENT, $LVIF_PARAM, $LVIF_STATE)
    $tItem.Item = $iIndex
    $tItem.SubItem = $iSubItem
    $tItem.StateMask = -1
    _GUICtrlListView_GetItemEx($hWnd, $tItem)

    Local $iState = $tItem.State

    Local $aItem[9]
    If BitAND($iState, $LVIS_CUT) <> 0 Then $aItem[0] = BitOR($aItem[0], 1)
    If BitAND($iState, $LVIS_DROPHILITED) <> 0 Then $aItem[0] = BitOR($aItem[0], 2)
    If BitAND($iState, $LVIS_FOCUSED) <> 0 Then $aItem[0] = BitOR($aItem[0], 4)
    If BitAND($iState, $LVIS_SELECTED) <> 0 Then $aItem[0] = BitOR($aItem[0], 8)
    $aItem[1] = __GUICtrlListView_OverlayImageMaskToIndex($iState)
    $aItem[2] = __GUICtrlListView_StateImageMaskToIndex($iState)
    $aItem[3] = _GUICtrlListView_GetItemText($hWnd, $iIndex, $iSubItem)
    $aItem[4] = $tItem.Image
    $aItem[5] = $tItem.Param
    $aItem[6] = $tItem.Indent
    $aItem[7] = $tItem.GroupID
    $aItem[8] = $tItem.Group

    Return $aItem
EndFunc   ;==>_GUICtrlListView_GetItem_mod

 

Edited 2 hours ago by mLipok