listview items randomly disappear

[Dana]

I'm not sure if this is a Win7 thing or a graphics driver thing or an Autoit thing, but...

Got a listview. Two columns, nothing unusual:

expandcollapse popup

<lots of stuff removed so this standalone snippet won't run>

$gui2 = GUICreate("Files to be deleted", 780, 600, -1, -1, $WS_OVERLAPPEDWINDOW)

$listid = GUICtrlCreateListView("Size|File Name", 20, 20, 740, 500, BitOR($LVS_SINGLESEL, $LVS_SHOWSELALWAYS, $LVS_NOSORTHEADER), BitOR($LVS_EX_GRIDLINES, $LVS_EX_FULLROWSELECT))
_GUICtrlListView_SetColumnWidth($listid, 0, 100)
_GUICtrlListView_SetColumnWidth($listid, 1, 2000)

For $l = 1 To $matches
    GUICtrlCreateListViewItem(FileGetSize($dellist[$l]) & "|" & $dellist[$l], $listid)
Next
$okbutton = GUICtrlCreateButton("OK", 30, 550, 60)
$cancelbutton = GUICtrlCreateButton("Cancel", 690, 550, 60)
$helpbutton = GUICtrlCreateButton("Help", 470, 550, 60)
$rembutton = GUICtrlCreateButton("Remove", 250, 550, 60)
$removed = 0
GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")
GUISetState(@SW_SHOW)

While 1
    $guimsg = GUIGetMsg()
    Switch $guimsg

        Case 0 ; handled by WM_NOTIFY, GUIGetMsg() = 0
            If $doubleclick = 1 Then
                $doubleclick = 0
                ContinueCase
            EndIf
        Case $rembutton
            $editline = _GUICtrlListView_GetSelectionMark($listid) ; zero based so one less than the data line number
            If $editline = -1 Then
                MsgBox(4096, "Error", "No item selected")
            EndIf
            _GUICtrlListView_SetItemText($listid, $editline, "|<removed from list>", -1)
            $dellist[$editline + 1] = ""
            $removed = $removed + 1

        Case $okbutton
            $delyn = MsgBox(1 + 48 + 256 + 0 + 262144, "Delete Files", $matches - $removed & " files will be deleted!" & @CRLF & @CRLF & "Are you sure?")
            If $delyn = 1 Then
                ; delete files here
                _ArrayDisplay($dellist) ; for debug
                exit
            Else
            EndIf

        Case $cancelbutton
            Exit
        Case $GUI_EVENT_CLOSE
            Exit
        Case $helpbutton
            MsgBox(0, "Help", "no help yet")
        Case Else
            ;Sleep(100)
    EndSwitch
WEnd


Exit

Func WM_NOTIFY($hWnd, $iMsg, $iwParam, $ilParam) ; subroutine to detect doubleclicks
    Local $hWndListView = GUICtrlGetHandle($listid)
    Local $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
    Local $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    Local $iCode = DllStructGetData($tNMHDR, "Code")
    If (($hWndFrom == $hWndListView) And ($iCode == $NM_DBLCLK)) Then
        $doubleclick = 1
    EndIf
EndFunc   ;==>WM_NOTIFY

The problem is that at times, the entire listview control simply disappears. I think it only happens when I first select a listview item and then move the mouse out of the gui, but it's very random. Once the listview disappears, if I click on it, the line I click on reappears... or I can move the scroll bar to scroll it out of view and back, and everything reappears. Regardless, the program itself works.

This is a new computer. I haven't seen this issue on my other (also Win7) computer. It's a new autoit script, largely copied (this morning) from another old program. I never saw the problem with the old program, but I tried the old program today on the new computer and it does it, too.

This happens if I run the script from SciTE or if it's compiled.

[Dana]

I can sorta bandaid it by putting GUICtrlSetState($listid, $GUI_SHOW) in the Case Else section, but then it flickers constantly... sometimes disappears, then is readrawn.

[PsaltyDS]

Post a short demo script that reproduces your symptoms.

[Zedna]

Try to elaborate with styles ex styles in

GUICtrlCreateListView

Maybe this bug will not appear with some styles combinations.

[Dana]

The _ArrayDisplay UDF included with AutoIt does the same thing.

[PsaltyDS]

No, it doesn't. There is something buggy about your environment, and I doubt it has anything to do with AutoIt.

Try this, since you couldn't come up with a running demo to talk about:

#include <Array.au3>

Global $aTest[16][8]
For $r = 0 To UBound($aTest) - 1
    For $c = 0 To UBound($aTest, 2) - 1
        $aTest[$r][$c] = $r & "-" & $c
    Next
Next
_ArrayDisplay($aTest, "$aTest")

[Dana]

Psalty, sorry, that's what I meant. Because _ArrayDisplay (including your example using it) does it too, on my machine, it's not something in my code. I've also confirmed now that it doesn't do it on my laptop, so it's definitely something peculiar to this specific computer or graphics driver (Win7 64 bit, NVIDIA Quadro 200 graphics).

But I haven't seen it in any other (non AutoIT) programs.

[Dana]

Nor is it just the listview; I'm seeing the same behavior with input boxes as well... not surprising as it's the same graphics style.

[Marshin]

@Dana, did you ever figure out the reason behind this problem?

I am having the same annoyance with my system.