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sonofalion

Using UP/DOWN in Listview

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DllStructCreate is so hard for newbies like me. There are many posts here and there that go about treating up/down keys in listviews but nothing does the simple thing I need.

I need a variable that is updated with the selected/focused item of the listview every time UP or DOWN key is used to move within the listview. Any easy solutions?

My function so far only treats clicked items:

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
    #forceref $hWnd, $iMsg, $wParam
    Local $hWndFrom, $iIDFrom, $iCode, $tNMHDR, $hWndListView, $tInfo
    $hWndListView = $ClauseList

    If Not IsHWnd($ClauseList) Then                                                ;(NEW LINE)
        $hWndListView = GUICtrlGetHandle($ClauseList)                            ;(NEW LINE)
    EndIf                                                                        ;(NEW LINE)

    $tNMHDR = DllStructCreate($tagNMHDR, $lParam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $hWndListView
            Switch $iCode
                Case $NM_CLICK ; Sent by a list-view control when the user clicks an item with the left mouse button
                    $tInfo = DllStructCreate($tagNMITEMACTIVATE, $lParam)
                    $j = _GUICtrlListView_GetSelectedIndices($ClauseList) ;get index of clicked item
                    _ActiveClause(Number($j)) ;this is a function I call
            EndSwitch
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc

Edited by sonofalion

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not tested - i think you can just use GUICtrlRead on the list, in periodic intervals (i'd put it in the main loop of my script). it returns the selected item.

(one thing i like about this technique, is that it also returns the selected item of a combobox - even if you are just hovering, before you actually selected it!)

if you insist on a hook instead of polling, then i can't help with that.

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sonofalion,

This works for me: :)

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GUIListView.au3>

Global $bChanged = False

$hGUI = GUICreate("Test", 500, 500)

$cLV = GUICtrlCreateListView("Column 1", 10, 10, 200, 200)
$hLV = GUICtrlGetHandle($cLV)
For $i = 0 To 19
    GUICtrlCreateListViewItem("Item " & $i, $cLV)
Next

GUISetState()

GUIRegisterMsg($WM_NOTIFY, "_WM_NOTIFY")

While 1

    Switch GUIGetMsg()
        Case $GUI_EVENT_CLOSE
            Exit
    EndSwitch

    If $bChanged Then
        $j = _GUICtrlListView_GetSelectedIndices($hLV)
        ConsoleWrite($j & @CRLF)
        $bChanged = False
    EndIf

WEnd

Func _WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
    #forceref $hWnd, $iMsg, $wParam
    Local $hWndFrom, $iIDFrom, $iCode, $tNMHDR, $hWndListView, $tInfo
    $hWndListView = $hLV

    $tNMHDR = DllStructCreate($tagNMHDR, $lParam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "IDFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $hWndListView
            Switch $iCode
                Case $LVN_KEYDOWN
                    $tStruct = DllStructCreate($tagNMLVKEYDOWN, $lParam)
                    $iKey = DllStructGetData($tStruct, "VKey")
                    Switch $iKey
                        Case 38, 40 ; Up, Down
                            $bChanged = True
                    EndSwitch
                Case $NM_CLICK
                    $bChanged = True
            EndSwitch

    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY
You need to look for the selection change in the idle loop as you must wait for the key press to take effect before reading the selected item - doing it in the handler is too soon. ;)

M23


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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