如何编辑ListView的subitem（VB）

摘自 jjkk168(老加班的人) ( ) 信誉：112

文件一，Form1.frm

加入一个Listview，两个Imagelist，一个文本框

代码如下：
Option Explicit
'
' Copyright ?1997-1999 Brad Martinez, http://www.mvps.org
'
' Demonstrates how to in place do SubItem editing in the VB ListView.

Private m_hwndLV As Long   ' ListView1.hWnd
Private m_hwndTB As Long   ' TextBox1.hWnd
Private m_iItem As Long         ' ListItem.Index whose SubItem is being edited
Private m_iSubItem As Long   ' zero based index of ListView1.ListItems(m_iItem).SubItem being edited
'

Private Sub Form_Load()
  Dim i As Long
  Dim item As ListItem
 
'  Text1.Appearance = ccFlat   ' ComctlLib enum value
  Text1.Visible = False
  m_hwndTB = Text1.hWnd
 
  ' Initialize the ImageLists
  With ImageList1
    .ImageHeight = 32
    .ImageWidth = 32
    .ListImages.Add Picture:=Icon
  End With
 
  With ImageList2
    .ImageHeight = 16
    .ImageWidth = 16
    .ListImages.Add Picture:=Icon
  End With
 
  ' Initialize the ListView
  With ListView1
'    .LabelEdit = lvwManual
    .HideSelection = False
    .Icons = ImageList1
    .SmallIcons = ImageList2
    m_hwndLV = .hWnd
   
    For i = 1 To 4
      .ColumnHeaders.Add Text:="column" & i
    Next
   
    For i = 0 To &H3F
      Set item = .ListItems.Add(, , "item" & i, 1, 1)
      item.SubItems(1) = i * 10
      item.SubItems(2) = i * 100
      item.SubItems(3) = i * 1000
    Next
  End With
 
 
End Sub

Private Sub Form_Resize()
'  ListView1.Move 0, 0, ScaleWidth, ScaleHeight
End Sub

Private Sub ListView1_DblClick()
  Dim lvhti As LVHITTESTINFO
  Dim rc As RECT
  Dim li As ListItem
   
  ' If a left button double-click... (change to suit)
  If (GetKeyState(vbKeyLButton) And &H8000) Then
 
    ' If a ListView SubItem is double clicked...
    Call GetCursorPos(lvhti.pt)
    Call ScreenToClient(m_hwndLV, lvhti.pt)
    If (ListView_SubItemHitTest(m_hwndLV, lvhti) <> LVI_NOITEM) Then
      If lvhti.iSubItem Then
       
        ' Get the SubItem's label (and icon) rect.
        If ListView_GetSubItemRect(m_hwndLV, lvhti.iItem, lvhti.iSubItem, LVIR_LABEL, rc) Then
         
          ' Either set the ListView as the TextBox parent window in order to
          ' have the TextBox Move method use ListView client coords, or just
          ' map the ListView client coords to the TextBox's paent Form
  '        Call SetParent(m_hwndTB, m_hwndLV)
          Call MapWindowPoints(m_hwndLV, hWnd, rc, 2)
          Text1.Move (rc.Left + 4) * Screen.TwipsPerPixelX, _
                              rc.Top * Screen.TwipsPerPixelY, _
                              (rc.Right - rc.Left) * Screen.TwipsPerPixelX, _
                              (rc.Bottom - rc.Top) * Screen.TwipsPerPixelY
         
          ' Save the one-based index of the ListItem and the zero-based index
          ' of the SubItem(if the ListView is sorted via the  API, then ListItem.Index
          ' will be different than lvhti.iItem +1...)
          m_iItem = lvhti.iItem + 1
          m_iSubItem = lvhti.iSubItem
         
          ' Put the SubItem's text in the TextBox, save the SubItem's text,
          ' and clear the SubItem's text.
          Text1 = ListView1.ListItems(m_iItem).SubItems(m_iSubItem)
          Text1.Tag = Text1
          ListView1.ListItems(m_iItem).SubItems(m_iSubItem) = ""
         
          ' Make the TextBox the topmost Form control, make the it visible, select
          ' its text, give it the focus, and subclass it.
          Text1.ZOrder 0
          Text1.Visible = True
          Text1.SelStart = 0
          Text1.SelLength = Len(Text1)
          Text1.SetFocus
          Call SubClass(m_hwndTB, AddressOf WndProc)
         
        End If   ' ListView_GetSubItemRect
      End If   ' lvhti.iSubItem
    End If   ' ListView_SubItemHitTest
  End If   ' GetKeyState(vbKeyLButton)
 
End Sub

' Selects the ListItem whose SubItem is being edited...

Private Sub Text1_GotFocus()
  ListView1.ListItems(m_iItem).Selected = True
End Sub

' If the TextBox is shown, size its width so that it's always a little
' longer than the length of its Text.

Private Sub Text1_Change()
  If m_iItem Then Text1.Width = TextWidth(Text1) + 180
End Sub

' Update the SubItem text on the Enter key, cancel on the Escape Key.

Private Sub Text1_KeyPress(KeyAscii As Integer)
 
  If (KeyAscii = vbKeyReturn) Then
    Call HideTextBox(True)
    KeyAscii = 0
  ElseIf (KeyAscii = vbKeyEscape) Then
    Call HideTextBox(False)
    KeyAscii = 0
  End If

End Sub

Friend Sub HideTextBox(fApplyChanges As Boolean)
 
  If fApplyChanges Then
    ListView1.ListItems(m_iItem).SubItems(m_iSubItem) = Text1
  Else
    ListView1.ListItems(m_iItem).SubItems(m_iSubItem) = Text1.Tag
  End If
 
  Call UnSubClass(m_hwndTB)
  Text1.Visible = False
  Text1 = ""
'  Call SetParent(m_hwndTB, hWnd)
'  ListView1.SetFocus
  m_iItem = 0
 
End Sub

文件二：Module1.bas

Option Explicit
'
' Copyright ?1997-1999 Brad Martinez, http://www.mvps.org
'
Public Type POINTAPI   ' pt
  X As Long
  Y As Long
End Type

Public Type RECT   ' rct
  Left As Long
  Top As Long
  Right As Long
  Bottom As Long
End Type

Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Declare Function ScreenToClient Lib "user32" (ByVal hWnd As Long, lpPoint As POINTAPI) As Long
Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As KeyCodeConstants) As Integer

Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Declare Function MapWindowPoints Lib "user32" (ByVal hwndFrom As Long, ByVal hwndTo As Long, lppt As Any, ByVal cPoints As Long) As Long

Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
                            (ByVal hWnd As Long, _
                            ByVal wMsg As Long, _
                            ByVal wParam As Long, _
                            lParam As Any) As Long   ' <---

' ========================================================================
' listview defs

#Const WIN32_IE = &H300

' user-defined
Public Const LVI_NOITEM = -1

' messages
Public Const LVM_FIRST = &H1000
#If (WIN32_IE >= &H300) Then
Public Const LVM_GETSUBITEMRECT = (LVM_FIRST + 56)
Public Const LVM_SUBITEMHITTEST = (LVM_FIRST + 57)
#End If

' LVM_GETSUBITEMRECT rct.Left
Public Const LVIR_ICON = 1
Public Const LVIR_LABEL = 2

Public Type LVHITTESTINFO   ' was LV_HITTESTINFO
  pt As POINTAPI
  flags As Long
  iItem As Long
#If (WIN32_IE >= &H300) Then
  iSubItem As Long    ' this is was NOT in win95.  valid only for LVM_SUBITEMHITTEST
#End If
End Type

' LVHITTESTINFO flags
Public Const LVHT_ONITEMLABEL = &H4
'

#If (WIN32_IE >= &H300) Then

Public Function ListView_GetSubItemRect(hWnd As Long, iItem As Long, iSubItem As Long, _
                                                                    code As Long, prc As RECT) As Boolean
  prc.Top = iSubItem
  prc.Left = code
  ListView_GetSubItemRect = SendMessage(hWnd, LVM_GETSUBITEMRECT, ByVal iItem, prc)
End Function

Public Function ListView_SubItemHitTest(hWnd As Long, plvhti As LVHITTESTINFO) As Long
  ListView_SubItemHitTest = SendMessage(hWnd, LVM_SUBITEMHITTEST, 0, plvhti)
End Function

#End If  ' ' WIN32_IE >= &H300

文件三：mSubClass.bas

Option Explicit
'
' Copyright ?1997-1999 Brad Martinez, http://www.mvps.org
'
Private Const WM_DESTROY = &H2
Private Const WM_KILLFOCUS = &H8

Private Declare Function GetProp Lib "user32" Alias "GetPropA" (ByVal hWnd As Long, ByVal lpString As String) As Long
Private Declare Function SetProp Lib "user32" Alias "SetPropA" (ByVal hWnd As Long, ByVal lpString As String, ByVal hData As Long) As Long
Private Declare Function RemoveProp Lib "user32" Alias "RemovePropA" (ByVal hWnd As Long, ByVal lpString As String) As Long

Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Const GWL_WNDPROC = (-4)

Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Private Const OLDWNDPROC = "OldWndProc"
'

Public Function SubClass(hWnd As Long, lpfnNew As Long) As Boolean
  Dim lpfnOld As Long
  Dim fSuccess As Boolean
 
  If (GetProp(hWnd, OLDWNDPROC) = 0) Then
    lpfnOld = SetWindowLong(hWnd, GWL_WNDPROC, lpfnNew)
    If lpfnOld Then
      fSuccess = SetProp(hWnd, OLDWNDPROC, lpfnOld)
    End If
  End If
 
  If fSuccess Then
    SubClass = True
  Else
    If lpfnOld Then Call UnSubClass(hWnd)
    MsgBox "Unable to successfully subclass &H" & Hex(hWnd), vbCritical
  End If
 
End Function

Public Function UnSubClass(hWnd As Long) As Boolean
  Dim lpfnOld As Long
 
  lpfnOld = GetProp(hWnd, OLDWNDPROC)
  If lpfnOld Then
    If RemoveProp(hWnd, OLDWNDPROC) Then
      UnSubClass = SetWindowLong(hWnd, GWL_WNDPROC, lpfnOld)
    End If
  End If

End Function

Public Function WndProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
 
  Select Case uMsg

    ' ======================================================
    ' Hide the TextBox when it loses focus (its LostFocus event it not fired
    ' when losing focus to a window outside the app).
   
    Case WM_KILLFOCUS
      ' OLDWNDPROC will be gone after UnSubClass is called, HideTextBox
      ' calls UnSubClass.
      Call CallWindowProc(GetProp(hWnd, OLDWNDPROC), hWnd, uMsg, wParam, lParam)
      Call Form1.HideTextBox(True)
      Exit Function
   
    ' ======================================================
    ' Unsubclass the window when it's destroyed in case someone forgot...
   
    Case WM_DESTROY
      ' OLDWNDPROC will be gone after UnSubClass is called!
      Call CallWindowProc(GetProp(hWnd, OLDWNDPROC), hWnd, uMsg, wParam, lParam)
      Call UnSubClass(hWnd)
      Exit Function
     
  End Select
 
  WndProc = CallWindowProc(GetProp(hWnd, OLDWNDPROC), hWnd, uMsg, wParam, lParam)
 
End Function

我还没有测试过，等测试后再说：）

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