AndyS19

ToolTip for individual ListView items

2 posts in this topic

I'm trying to create a dynamic ToolTip that displays the text of the ListView item that the cursor is hovering over.  I found examples on line that displayed a ToolTip whenever the cursor is over the ListView, but I cannot figure out how to get the text of the ListView item under the cursor.

Test code:

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

Opt('MustDeclareVars', 1)

Global Const $LPSTR_TEXTCALLBACK = -1
Global $hMainWin, $iID_ListView, $iID_ListView_hHeader, $hToolTip

_Main()

Func _Main()
    createGUI()

    GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")

    While (1)
        Local $msg = GUIGetMsg()
        Select
            Case $msg = $GUI_EVENT_CLOSE
                Exit
        EndSelect
        Sleep(125)
    WEnd
EndFunc   ;==>_Main

Func WM_NOTIFY($hWnd, $IMsg, $iwParam, $ilParam)
    #forceref $hWnd, $IMsg, $iwParam
    Local $hwndFrom, $iIDFrom, $iCode, $tNMHDR, $hWndListView, $tInfo,  $gText, $aPos

    $hWndListView = $iID_ListView
    If Not IsHWnd($iID_ListView) Then $hWndListView = GUICtrlGetHandle($iID_ListView)

    $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
    $hwndFrom = HWnd(DllStructGetData($tNMHDR, "hwndFrom"))
    $iIDFrom = DllStructGetData($tNMHDR, "idFrom")
    $iCode = DllStructGetData($tNMHDR, "Code")

    ; Get the rect of the Listview
    $aPos = _GUICtrl_GetMessagePos($iIDFrom)

    Switch $hwndFrom
        Case $hWndListView
            Switch $iCode
                Case $LVN_HOTTRACK; Sent by a list-view control When the user moves the mouse over an item
                    $tInfo = DllStructCreate($tagNMLISTVIEW, $ilParam)
                    $gText = _GUICtrlListView_GetItemText($hwndFrom, DllStructGetData($tInfo, "Index"), 0)
                    ToolTip($gText)
                    ; Return 0; Allow the ListView to perform its normal track select processing.
                    Return 1; the item will not be selected.
                    ; No returnValue
            EndSwitch
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

; e.g.:
;      _GUIToolTip_AddToolMod($hToolTip, $hMainWin, $LPSTR_TEXTCALLBACK, _
;      $iID_ListView_hHeader, _
;      0, 0, 0, 0, BitOR(1, 8), $iID_ListView_hHeader)

Func _GUIToolTip_AddToolMod($hTool, $hWnd, $sText, $iID = 0, $iLeft = 0, $iTop = 0, $iRight = 0, $iBottom = 0, $iFlags = 8, $iParam = 0)
    Local $tToolInfo = DllStructCreate($tagTOOLINFO)
    Local $pToolInfo = DllStructGetPtr($tToolInfo)
    Local $iToolInfo = DllStructGetSize($tToolInfo)
    DllStructSetData($tToolInfo, "Size", $iToolInfo)
    DllStructSetData($tToolInfo, "Flags", _GUIToolTip_BitsToTTF($iFlags))
    DllStructSetData($tToolInfo, "hWnd", $hWnd)
    DllStructSetData($tToolInfo, "ID", $iID)
    DllStructSetData($tToolInfo, "Left", $iLeft)
    DllStructSetData($tToolInfo, "Top", $iTop)
    DllStructSetData($tToolInfo, "Right", $iRight)
    DllStructSetData($tToolInfo, "Bottom", $iBottom)
    DllStructSetData($tToolInfo, "Param", $iParam)

    Local $iRet = 0
    If IsString($sText) Then
        Local $iBuffer = StringLen($sText) + 1
        Local $tBuffer = DllStructCreate("wchar Text[" & $iBuffer & "]")
        $iBuffer *= 2
        Local $pBuffer = DllStructGetPtr($tBuffer)
        DllStructSetData($tBuffer, "Text", $sText)
        DllStructSetData($tToolInfo, "Text", $pBuffer)
        $iRet = _SendMessage($hTool, $TTM_ADDTOOLW, 0, $pToolInfo, 0, "wparam", "ptr")
    Else
        DllStructSetData($tToolInfo, "Text", $sText)
        $iRet = _SendMessage($hTool, $TTM_ADDTOOLW, 0, $pToolInfo, 0, "wparam", "ptr")
    EndIf
    Return $iRet <> 0
EndFunc   ;==>_GUIToolTip_AddToolMod

Func _GUICtrl_GetMessagePos($control)
    Local $p = DllCall("user32.dll", "DWORD", "GetMessagePos")
    Local $pt = DllStructCreate($tagPOINT)
    DllStructSetData($pt, "X", _WinAPI_LoWord($p[0]))
    DllStructSetData($pt, "Y", _WinAPI_HiWord($p[0]))
    _WinAPI_ScreenToClient(_GUICtrl_GetHandle($control), $pt)
    Local $result[2] = [DllStructGetData($pt, "X"), DllStructGetData($pt, "Y")]
    Return $result
EndFunc   ;==>_GUICtrl_GetMessagePos

Func _GUICtrl_GetHandle($control)
    If IsHWnd($control) Then Return $control
    Return GUICtrlGetHandle($control)
EndFunc   ;==>_GUICtrl_GetHandle


Func createGUI()
    Local $flags, $flagsEX, $w, $h, $str

    $w = 250
    $h = 200
    $flags = BitOR($WS_CAPTION, $WS_VISIBLE)

    $hMainWin = GUICreate("ToolTip test", 250, 200, -1, -1, $flags)

    $flags = $WS_VISIBLE
    $flagsEX = BitOR($LVS_EX_FULLROWSELECT, $LVS_EX_INFOTIP)

    $iID_ListView = GUICtrlCreateListView("Column 0|Column 1|Column 2", 10, 10, $w - 15, $h - 25, $flags, $flagsEX)

    For $i = 0 To 5
        $str = StringFormat("Item %s|abc%s|def%s", $i, $i, $i)
        GUICtrlCreateListViewItem($str, $iID_ListView)
    Next

    $iID_ListView_hHeader = _GUICtrlListView_GetHeader($iID_ListView)
    $hToolTip = _GUIToolTip_Create($hMainWin)

    _GUIToolTip_AddToolMod($hToolTip, $hMainWin, $LPSTR_TEXTCALLBACK, _
            $iID_ListView_hHeader, 0, 0, 0, 0, BitOR(1, 8), $iID_ListView_hHeader)

EndFunc   ;==>createGUI

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AndyS19,

You were really close:

$tInfo = DllStructCreate($tagNMLISTVIEW, $ilParam)
$gText = _GUICtrlListView_GetItemText($hwndFrom, DllStructGetData($tInfo, "Item"), DllStructGetData($tInfo, "SubItem"))
ToolTip($gText)

You just needed the correct names for the struct elements.

M23


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