LV cell fore-/background color disap disappearing

[supersonic]

Hi,

I have found a code example to set the fore-/background color in ListViews:

http://www.autoit.de/index.php?page=Thread&threadID=25071 .

Setting the colors works fine but if I scroll down/up only the last color setting remains.

Here's the (modified) code example:

expandcollapse popup

; [url="http://www.autoitscript.com/forum/topic/62749-alternating-row-background-color/page__view__findpost__p__470173"]http://www.autoitscript.com/forum/topic/62749-alternating-row-background-color/page__view__findpost__p__470173[/url]
; [url="http://www.autoit.de/index.php?page=Thread&threadID=25071"]http://www.autoit.de/index.php?page=Thread&threadID=25071[/url]

#include <GuiConstantsEx.au3>
#include <GuiListView.au3>
#include <ListViewConstants.au3>
#include <StructureConstants.au3>
#include <WindowsConstants.au3>

Global $___LV_BKCOLOR_CUSTOM = 0xFFFFFF
Global $___LV_BKCOLOR_DEFAULT = 0xFFFFFF
Global $___LV_COLOR_CUSTOM  = 0x000000
Global $___LV_COLOR_DEFAULT  = 0x000000
Global $___LV_ITEM  = -1
Global $___LV_SUBITEM   = -1

Local $hGUI   = GUICreate("", 400, 300, -1, -1)
Local $cListView = GUICtrlCreateListView("", 2, 2, 394, 268)
Local $hListView = GUICtrlGetHandle($cListView)

_GUICtrlListView_SetExtendedListViewStyle($hListView, BitOR($LVS_EX_GRIDLINES, $LVS_EX_FULLROWSELECT))
_GUICtrlListView_InsertColumn($hListView, 0, "Column 1", 100)
_GUICtrlListView_InsertColumn($hListView, 1, "Column 2", 100)
_GUICtrlListView_InsertColumn($hListView, 2, "Column 3", 100)

For $i = 1 To 30
_GUICtrlListView_AddItem($hListView, "Row" & $i & ": Col 1", $i - 1)
For $j = 1 To 2
  _GUICtrlListView_AddSubItem($hListView, $i - 1, "Row" & $i & ": Col " & $j + 1, $j)
Next
Next

GUIRegisterMsg($WM_NOTIFY, "_WM_NOTIFY")
GUISetState()

_GUICtrlListView_SetItemBkColor($hListView, 4, 0, 0xFFFF00, 0xFF0000)
_GUICtrlListView_SetItemBkColor($hListView, 5, 1, 0xFFFF00, 0x00FF00)
_GUICtrlListView_SetItemBkColor($hListView, 6, 2, 0xFFFF00, 0x0000FF)

Do
Sleep(10)
Until GUIGetMsg() = $GUI_EVENT_CLOSE

Func _GUICtrlListView_SetItemBkColor($hWnd, $iItem, $iSubitem, $iColor = $___LV_COLOR_DEFAULT, $iBkColor = $___LV_BKCOLOR_DEFAULT)
Local $bReturn = False
If $iItem >= 0 Then
  If $iSubitem >= 0 Then
;~  If _GUICtrlListView_BeginUpdate($hWnd) = True Then
    $___LV_BKCOLOR_CUSTOM = $iBkColor
    $___LV_COLOR_CUSTOM  = $iColor
    $___LV_ITEM = $iItem
    $___LV_SUBITEM   = $iSubitem
    If _GUICtrlListView_SetItemText($hWnd, $___LV_ITEM, _GUICtrlListView_GetItemText($hListView, $___LV_ITEM, $___LV_SUBITEM), $___LV_SUBITEM) = True Then
;~   If _GUICtrlListView_EndUpdate($hWnd) = True Then
      $bReturn = True
;~   Else ; Error.
;~    SetError(5, 0)
;~   EndIf
    Else ; Error.
     SetError(4, 0)
    EndIf
;~  Else ; Error.
;~  SetError(3, 0)
;~  EndIf
  Else ; Error.
   SetError(2, 0)
  EndIf
Else ; Error.
  SetError(1, 0)
EndIf
Return $bReturn
EndFunc

Func _WM_NOTIFY($hWnd, $iMsg, $iwParam, $ilParam)
#ForceRef $hWnd, $iMsg, $iwParam, $ilParam
Local $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
;~  Local $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
Local $iCode = DllStructGetData($tNMHDR, "Code")
Local $hWndFrom = DllStructGetData($tNMHDR, "hWndFrom")
;~  Local $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
Local $hWnd1 = $hListView
If Not IsHWnd($hListView) Then $hWnd1 = GUICtrlGetHandle($hListView)
Switch $hWndFrom
  Case $hWnd1
   Switch $iCode
    Case $NM_CUSTOMDRAW
     If Not _GUICtrlListView_GetViewDetails($hWndFrom) Then Return $GUI_RUNDEFMSG
;~   If _GUICtrlListView_GetViewDetails($hWndFrom) = True Then
      Local $tNMLVCUSTOMDRAW = DllStructCreate($tagNMLVCUSTOMDRAW, $ilParam)
      Switch DllStructGetData($tNMLVCUSTOMDRAW, "dwDrawStage")
       Case $CDDS_ITEMPREPAINT
        Return $CDRF_NOTIFYSUBITEMDRAW
       Case BitOR($CDDS_ITEMPREPAINT, $CDDS_SUBITEM)
        Local $iItem = DllStructGetData($tNMLVCUSTOMDRAW, "dwItemSpec") ; Row.
        Local $iSubitem = DllStructGetData($tNMLVCUSTOMDRAW, "iSubItem") ; Column.
        If $iItem = $___LV_ITEM And $iSubitem = $___LV_SUBITEM Then
         DllStructSetData($tNMLVCUSTOMDRAW, "clrText", BitAND(BitShift(String(Binary($___LV_COLOR_CUSTOM)), 8), 0xFFFFFF)) ; Custom foreground color.
         DllStructSetData($tNMLVCUSTOMDRAW, "clrTextBk", BitAND(BitShift(String(Binary($___LV_BKCOLOR_CUSTOM)), 8), 0xFFFFFF)) ; Custom background color.
        Else ; Non-error.
         DllStructSetData($tNMLVCUSTOMDRAW, "clrText", BitAND(BitShift(String(Binary($___LV_COLOR_DEFAULT)), 8), 0xFFFFFF)) ; Default foreground color.
         DllStructSetData($tNMLVCUSTOMDRAW, "clrTextBk", BitAND(BitShift(String(Binary($___LV_BKCOLOR_DEFAULT)), 8), 0xFFFFFF)) ; Default background color.
        EndIf
        Return $CDRF_NEWFONT
      EndSwitch
;~   EndIf
   EndSwitch
EndSwitch
Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

It seems that the settings only remains during item/subitem creation via _GUICtrlListView_AddItem/_GUICtrlListView_AddSubItem.

I'm trying to set the colors AFTER the ListView is created/filled - the colors are used to indicate a state.

I tried out "everything" I know but I cannot solve it on my own.

Please, could anyone help me to improve this?

Greets,

-supersonic.

Edited May 29, 2012 by supersonic

[qsek]

This example is quite misconcepted.

There are Global variables for identifying Colored item but it can only hold the information for ONE colored item.

The _GUICtrlListView_SetItemBkColor itself updates the item on creation and renders the according color, but on an update on the listview, only the last item/color information can be redrawn. The previous item/color information is lost and therfore redered again in normal color.

Use this UDF instead: