_GUICtrlListView_* Flicker

[zackrspv]

Is there a way to remove the flicker that occurs when items are added/removed from the list view, when a background iamge is included in the create? DoubleBuffer already is included, but still flickers.

Example is from Help file, only change is the For/Next loop to add items.

expandcollapse popup

#AutoIt3Wrapper_au3check_parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6
#include <GuiConstantsEx.au3>
#include <GuiListView.au3>
#include <GuiImageList.au3>

Opt('MustDeclareVars', 1)

$Debug_LV = False ; Check ClassName being passed to ListView functions, set to True and use a handle to another control to see it work

Example_UDF_Created() ;use UDF built listview

Func Example_UDF_Created()
    Local $GUI, $hImage, $hListView, $aImage
    Local $exStyles = BitOR($LVS_EX_FULLROWSELECT, $LVS_EX_DOUBLEBUFFER)

    $GUI = GUICreate("(UDF Created) ListView Set Background Image", 600, 550)

    ;=========================================================================================================
    $hListView = _GUICtrlListView_Create($GUI, "", 2, 2, 596, 500, -1, -1, True) ; Last option Calls CoInitializeEx
    ;=========================================================================================================
    _GUICtrlListView_SetExtendedListViewStyle($hListView, $exStyles)
    ; Load images
    $hImage = _GUIImageList_Create()
    _GUIImageList_Add($hImage, _GUICtrlListView_CreateSolidBitMap($hListView, 0xFF0000, 16, 16))
    _GUIImageList_Add($hImage, _GUICtrlListView_CreateSolidBitMap($hListView, 0x00FF00, 16, 16))
    _GUIImageList_Add($hImage, _GUICtrlListView_CreateSolidBitMap($hListView, 0x0000FF, 16, 16))
    _GUICtrlListView_SetImageList($hListView, $hImage, 1)

    ; Add columns
    _GUICtrlListView_InsertColumn($hListView, 0, "Column 1", 100)
    _GUICtrlListView_InsertColumn($hListView, 1, "Column 2", 100)
    _GUICtrlListView_InsertColumn($hListView, 2, "Column 3", 100)

    ; Add items
    _GUICtrlListView_AddItem($hListView, "Row 1: Col 1", 0)
    _GUICtrlListView_AddSubItem($hListView, 0, "Row 1: Col 2", 1)
    _GUICtrlListView_AddSubItem($hListView, 0, "Row 1: Col 3", 2)
    _GUICtrlListView_AddItem($hListView, "Row 2: Col 1", 1)
    _GUICtrlListView_AddSubItem($hListView, 1, "Row 2: Col 2", 1)
    _GUICtrlListView_AddItem($hListView, "Row 3: Col 1", 2)

    ; Build groups
    _GUICtrlListView_EnableGroupView($hListView)
    _GUICtrlListView_InsertGroup($hListView, -1, 1, "Group 1")
    _GUICtrlListView_InsertGroup($hListView, -1, 2, "Group 2")
    _GUICtrlListView_SetItemGroupID($hListView, 0, 1)
    _GUICtrlListView_SetItemGroupID($hListView, 1, 2)
    _GUICtrlListView_SetItemGroupID($hListView, 2, 2)

;~  _GUICtrlListView_SetBkColor ($hListView, $CLR_NONE)
;~  _GUICtrlListView_SetTextColor ($hListView, $CLR_NONE)
;~  _GUICtrlListView_SetTextBkColor ($hListView, $CLR_NONE)

    ; Get the Image
    Local $sURL = "http://www.autoitscript.com/autoit3/files/graphics/autoit9_wall_grey_800x600.jpg"
    Local $sFilePath = @ScriptDir & "\AutoIt.jpg"
    InetGet($sURL, $sFilePath)

    ; Set the Background Image
    _GUICtrlListView_SetBkImage($hListView, $sFilePath)
    $aImage = _GUICtrlListView_GetBkImage($hListView)

    GUISetState()

for $i = 3 to 10
    _GUICtrlListView_AddItem($hListView, "Row "&$i-1&": Col 1", $i)
    _GUICtrlListView_SetItemGroupID($hListView, $i, int(Random(1, 2)))
    sleep(500)
Next
    ConsoleWrite("Background Image: " & $aImage[1]&@CRLF)

    ; Loop until user exits
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE
    ;=========================================================================================================
    DllCall('ole32.dll', 'long', 'CoUinitialize') ; Must call for each CoInitializeEx call made
    ;=========================================================================================================

    GUIDelete()
    FileDelete($sFilePath)
EndFunc   ;==>Example_UDF_Created

Edited September 24, 2009 by zackrspv

[GEOSoft]

Put your GUISetState() after the For/Next loop.

[PsaltyDS]

Put your GUISetState() after the For/Next loop.

That will work for the initial build of the GUI, but doesn't help with later updates. Bracket the update with _GUICtrlListView_BeginUpdate() and _GUICtrlListView_EndUpdate() instead.

[zackrspv]

That will work for the initial build of the GUI, but doesn't help with later updates. Bracket the update with _GUICtrlListView_BeginUpdate() and _GUICtrlListView_EndUpdate() instead.

does not prevent the flickering when there's an image.

for $i = 3 to 10
    _GUICtrlListView_BeginUpdate($hListView)
    _GUICtrlListView_AddItem($hListView, "Row "&$i-1&": Col 1", $i)
    _GUICtrlListView_SetItemGroupID($hListView, $i, int(Random(1, 2)))
    _GUICtrlListView_EndUpdate($hListView)
    sleep(500)
Next

When put into the script from the help file, the main picture still flashes after each update. Is there no way to make the list view NOT keep retrying the image? I cannot just put the setstate() after the items are added, as this is a live list view, items will be removed/added via remote chat/updates/server queries all the time.

But, i need the image there, so that the list view looks like it has a transparent background.

Now, unless you had a method for that, i need the flicker to stop lol

[PsaltyDS]

does not prevent the flickering when there's an image.

for $i = 3 to 10
    _GUICtrlListView_BeginUpdate($hListView)
    _GUICtrlListView_AddItem($hListView, "Row "&$i-1&": Col 1", $i)
    _GUICtrlListView_SetItemGroupID($hListView, $i, int(Random(1, 2)))
    _GUICtrlListView_EndUpdate($hListView)
    sleep(500)
Next

When put into the script from the help file, the main picture still flashes after each update. Is there no way to make the list view NOT keep retrying the image? I cannot just put the setstate() after the items are added, as this is a live list view, items will be removed/added via remote chat/updates/server queries all the time.

But, i need the image there, so that the list view looks like it has a transparent background.

Now, unless you had a method for that, i need the flicker to stop lol

No, you are still repeating the Begin/End Update inside the loop. Put that outside the loop:

_GUICtrlListView_BeginUpdate($hListView)
    For $i = 3 To 10
        _GUICtrlListView_AddItem($hListView, "Row " & $i - 1 & ": Col 1", $i)
        _GUICtrlListView_SetItemGroupID($hListView, $i, Random(1, 2, 1))
        Sleep(500)
    Next
_GUICtrlListView_EndUpdate($hListView)

Edited September 25, 2009 by PsaltyDS

[zackrspv]

No, you are still repeating the Begin/End Update inside the loop. Put that outside the loop:

_GUICtrlListView_BeginUpdate($hListView)
    For $i = 3 To 10
        _GUICtrlListView_AddItem($hListView, "Row " & $i - 1 & ": Col 1", $i)
        _GUICtrlListView_SetItemGroupID($hListView, $i, Random(1, 2, 1))
        Sleep(500)
    Next
_GUICtrlListView_EndUpdate($hListView)

The problem tho, is that when 'EndUpdate' is called, the list still refreshes. Is there no way to stop the flicker from ever happening? Can the list view itself, have a transparent background?