Getting Filtertext from Header / Listview

[chrisser]

Hi,

i hope someone can help me. I try to get the filtertext from the header of a Listview. I have no idea to handle the "$tagHDTEXTFILTER" from the "GUI_Header.au3".

Here is an example, found here some years ago. I can´t find the post again.

Thanks,

chrisser

 

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#include <Constants.au3>
#include <GUIConstants.au3>
#include <WindowsConstants.au3>
#include <GUIListView.au3>
#include <WinAPI.au3>

$gui = GUICreate("listview filter", 400, 250, -1, -1)
$listview = GUICtrlCreateListView("col0|col1|col2", 10, 10, 380, 230)
GUICtrlSendMsg(-1, 0x101E, 0, 125)
GUICtrlSendMsg(-1, 0x101E, 1, 125)
GUICtrlSendMsg(-1, 0x101E, 2, 125)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUISetState()

;Use of lock/unlock and begin/end update is just to cause repainting so the filterbar is fully visible
GUISetState(@SW_LOCK, $gui)

_GUICtrlListView_BeginUpdate($listview)

;Add the filter bar to the header control
$header = _GUICtrlListView_GetHeader($listview)
$styles = _WinAPI_GetWindowLong($header, $GWL_STYLE)
_WinAPI_SetWindowLong($header, $GWL_STYLE, BitOR($styles, $HDS_FILTERBAR))

;Use of lock/unlock and begin/end update is just to cause repainting so the filterbar is fully visible
_GUICtrlListView_EndUpdate($listview)
GUISetState(@SW_UNLOCK, $gui)

_GUICtrlHeader_EditFilter($header, 0)
    Send("Filter 1")

;Register WM_NOTIFY to handle $HDN_FILTERBTNCLICK messages
GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")

Sleep(1000)
MsgBox(0,"",_GUICtrlHeader_GetFilterText($header, 0))
;Loop GUI until exit
Do
    $msg = GUIGetMsg()

Until $msg = $GUI_EVENT_CLOSE



Func WM_NOTIFY($hWnd, $iMsg, $iwParam, $ilParam)
    Local $hWndFrom, $iIDFrom, $iCode
    Local $tNMHDR, $tNMHEADER, $tNMHDFILTERBTNCLICK, $tHDTEXTFILTER, $tNMHDDISPINFO
    Local $iHeaderItem, $tItem
    Local $HDFT_ISSTRING = 0x0
    Local $HDFT_ISNUMBER = 0x1

    $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $header
            Switch $iCode
                Case $HDN_FILTERBTNCLICK ; Notifies the header control's parent window when the filter button is clicked or in response to an $HDM_SETITEM message
                    $tNMHDFILTERBTNCLICK = DllStructCreate($tagNMHDFILTERBTNCLICK, $ilParam)
                    $tHDTEXTFILTER = DllStructCreate($tagHDTEXTFILTER, $ilParam)
                    $column = DllStructGetData($tNMHDFILTERBTNCLICK, "Item")
                    $text = DllStructGetData($tHDTEXTFILTER, "Text")
                    MsgBox(0, "Msg", "Filter button click for column " & $column & @CRLF & _
                           "Text: " & $text)

                    ;Return True  ; An $HDN_FILTERCHANGE notification will be sent to the header control's parent window
                    ; This notification gives the parent window an opportunity to synchronize its user interface elements
                    Return False ; If you do not want the notification sent
                Case $HDN_FILTERCHANGE ; Notifies the header control's parent window that the attributes of a header control filter are being changed or edited
                    ;$tNMHEADER = DllStructCreate($tagNMHEADER, $ilParam)
                    ; no return value
            EndSwitch
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

Func _GUICtrlHeader_GetFilterText($hWnd, $iIndex)
    Local $bUnicode = _GUICtrlHeader_GetUnicodeFormat($hWnd)

    Local $tBuffer
    If $bUnicode Then
        $tBuffer = DllStructCreate("wchar Text[4096]")
    Else
        $tBuffer = DllStructCreate("char Text[4096]")
    EndIf
    Local $tItem = DllStructCreate($tagHDTEXTFILTER)
    DllStructSetData($tItem, "TextMax", 4096)
    If _WinAPI_InProcess($hWnd, $__g_hHDRLastWnd) Then
        DllStructSetData($tItem, "Text", DllStructGetPtr($tBuffer))
        _SendMessage($hWnd, $HDM_GETITEMW, $iIndex, $tItem, 0, "wparam", "struct*")
    Else
        Local $iItem = DllStructGetSize($tItem)
        Local $tMemMap
        Local $pMemory = _MemInit($hWnd, $iItem + DllStructGetSize($tBuffer), $tMemMap)
        Local $pText = $pMemory + $iItem
        DllStructSetData($tItem, "Text", $pText)
        _MemWrite($tMemMap, $tItem, $pMemory, $iItem)
        If $bUnicode Then
            _SendMessage($hWnd, $HDM_GETITEMW, $iIndex, $pMemory, 0, "wparam", "ptr")
        Else
            _SendMessage($hWnd, $HDM_GETITEMA, $iIndex, $pMemory, 0, "wparam", "ptr")
        EndIf
        _MemRead($tMemMap, $pText, $tBuffer, DllStructGetSize($tBuffer))
        _MemFree($tMemMap)
    EndIf
    Return DllStructGetData($tBuffer, "Text")
EndFunc   ;==>_GUICtrlHeader_GetItemText

 

[LarsJ]

Here you are:

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#include <Constants.au3>
#include <GUIConstants.au3>
#include <WindowsConstants.au3>
#include <GUIListView.au3>
#include <WinAPI.au3>

$gui = GUICreate("listview filter", 400, 250, -1, -1)
$listview = GUICtrlCreateListView("col0|col1|col2", 10, 10, 380, 230)
GUICtrlSendMsg(-1, 0x101E, 0, 125)
GUICtrlSendMsg(-1, 0x101E, 1, 125)
GUICtrlSendMsg(-1, 0x101E, 2, 125)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUICtrlCreateListViewItem("blue|green|blue", $listview)
GUICtrlCreateListViewItem("red|blue|green", $listview)
GUICtrlCreateListViewItem("green|red|red", $listview)
GUISetState()

;Use of lock/unlock and begin/end update is just to cause repainting so the filterbar is fully visible
GUISetState(@SW_LOCK, $gui)

_GUICtrlListView_BeginUpdate($listview)

;Add the filter bar to the header control
$header = _GUICtrlListView_GetHeader($listview)
$styles = _WinAPI_GetWindowLong($header, $GWL_STYLE)
_WinAPI_SetWindowLong($header, $GWL_STYLE, BitOR($styles, $HDS_FILTERBAR))

;Use of lock/unlock and begin/end update is just to cause repainting so the filterbar is fully visible
_GUICtrlListView_EndUpdate($listview)
GUISetState(@SW_UNLOCK, $gui)

_GUICtrlHeader_EditFilter($header, 0)
    Send("Filter 1")

;Register WM_NOTIFY to handle $HDN_FILTERBTNCLICK messages
GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")

;Loop GUI until exit
Do
    $msg = GUIGetMsg()

Until $msg = $GUI_EVENT_CLOSE



Func WM_NOTIFY($hWnd, $iMsg, $iwParam, $ilParam)
    Local $hWndFrom, $iIDFrom, $iCode
    Local $tNMHDR, $tNMHEADER, $tNMHDFILTERBTNCLICK, $tHDTEXTFILTER, $tNMHDDISPINFO
    Local $iHeaderItem, $tItem
    Local $HDFT_ISSTRING = 0x0
    Local $HDFT_ISNUMBER = 0x1

    $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $header
            Switch $iCode
                Case $HDN_FILTERBTNCLICK ; Notifies the header control's parent window when the filter button is clicked or in response to an $HDM_SETITEM message
                    $tNMHDFILTERBTNCLICK = DllStructCreate($tagNMHDFILTERBTNCLICK, $ilParam)
                    $column = DllStructGetData($tNMHDFILTERBTNCLICK, "Item")

                    $tText = DllStructCreate( "wchar[64]" )
                    $pText = DllStructGetPtr( $tText )
                    $tHDTEXTFILTER = DllStructCreate( $tagHDTEXTFILTER )
                    $pHDTEXTFILTER = DllStructGetPtr( $tHDTEXTFILTER )
                    DllStructSetData( $tHDTEXTFILTER, "Text", $pText )
                    DllStructSetData( $tHDTEXTFILTER, "TextMax", 64 )
                    
                    $tHDITEM = DllStructCreate( $tagHDITEM )
                    DllStructSetData( $tHDITEM, "Mask", $HDI_FILTER )
                    DllStructSetData( $tHDITEM, "Type", 0 )
                    DllStructSetData( $tHDITEM, "pFilter", $pHDTEXTFILTER )
                    $pHDITEM = DllStructGetPtr( $tHDITEM )
                    
                    _SendMessage( $header, $HDM_GETITEMW, $column, $pHDITEM )
                    
                    $sText = DllStructGetData( $tText, 1 )
                    MsgBox(0, "Msg", "Filter button click for column " & $column & @CRLF & _
                           "Text: " & $sText)

                    ;Return True  ; An $HDN_FILTERCHANGE notification will be sent to the header control's parent window
                    ; This notification gives the parent window an opportunity to synchronize its user interface elements
                    Return False ; If you do not want the notification sent
                Case $HDN_FILTERCHANGE ; Notifies the header control's parent window that the attributes of a header control filter are being changed or edited
                    ;$tNMHEADER = DllStructCreate($tagNMHEADER, $ilParam)
                    ; no return value
            EndSwitch
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

Nice filters. I've never used filters before. It seems as if you have to do everything manually. If you type a filter text you have to manually update the rows in the listview to reflect the filter.

[chrisser]

Wow! Thank you so much Lars!!! I almost get no sleep because of this last night ;D I think those filters can be very practically in bigger listviews.

I can build a new (My)SQL- Select from this information and rebuild the listview. So for that case it´s easy to go on.

And now i understand how the DLL-Functions are working!