Prevent a treeview node to collapse on double-click

Hi,

Does somebody knows how to prevent a treeview parent node from collapsing on double-click.

I would like to launch something on double click of my nodes but make it impossible to collapse/expand nodes except from the plus/minus sign box.

I know I can probably do it by using subclassing. What I am looking for is the message I have to intercept.

Thanks in advance!

Tipi

Try this

Code:

---

Private Sub Form_Load()
    TreeView1.Nodes.Add TreeView1.Nodes.Add(, , , "A"), 4, , "b"
End Sub

Private Sub TreeView1_Collapse(ByVal Node As MSComctlLib.Node)
    Node.Child.EnsureVisible
End Sub

---

Not exactly the solution I was looking for since I want to be able to expand/collapse using plus/minus sign...

Thanks,

Tipi

[Edited by Tipi on 05-30-2000 at 11:11 AM]

Code:

---

'This code goes in form
Private Sub Form_Load()
  Hook TreeView1.hWnd
End Sub

Private Sub Form_Unload()
  Unhook TreeView1.hWnd
End Sub


'This code goes in module
Option Explicit

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


Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public Const WM_LBUTTONDBLCLICK = &H203


Function WindowProcedure(ByVal hw As Long, ByVal uMsg As _
    Long, ByVal wParam As Long, ByVal lParam As Long) As _
    Long

If uMsg = &H203 Then
  Call DoWhatYouWant
  Exit Function
End If

WindowProcedure = CallWindowProc(lpPrevWndProc, hw, _
uMsg, wParam, lParam)
End Function

Public Sub Hook(hWnd As Long)
    lpPrevWndProc = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProcedure)
End Sub

Public Sub Unhook(hWnd As Long)
    Dim temp As Long
    temp = SetWindowLong(hWnd, GWL_WNDPROC, lpPrevWndProc)
End Sub

---

Sorry i didn't test that code, this shoud work:
[/code]
Private stage%
Private Sub Form_Load()
TreeView1.Nodes.Add TreeView1.Nodes.Add(, , , "A"), 4, , "b"
End Sub

Private Sub TreeView1_Collapse(ByVal Node As MSComctlLib.Node)
If stage = 1 Then stage = 2: Node.expanded = True: TreeView1.Tag = ""
End Sub

Private Sub TreeView1_Expand(ByVal Node As MSComctlLib.Node)
If stage = 1 Then stage = 2: Node.Expanded = False: TreeView1.Tag = ""
End Sub

Private Sub TreeView1_NodeClick(ByVal Node As MSComctlLib.Node)
stage = 1
End Sub
[/code]

try this:

Code:

---

Option Explicit
Private Sub Form_Load()
tv1.Nodes.Add , , "main", "Hey"
tv1.Nodes.Add "main", tvwChild, "child", "Hey1"
End Sub

Private Sub tv1_Click()
tv1.SelectedItem.Expanded = True

End Sub

Private Sub tv1_Collapse(ByVal Node As MSComctlLib.Node)
Node.Image = "closed"
End Sub
Private Sub tv1_DblClick()
tv1.SelectedItem.Expanded = False
End Sub

Private Sub tv1_Expand(ByVal Node As MSComctlLib.Node)
Node.Image = "open"
End Sub

---

whats "Private stage%" do ??

edit: thanks 2 whoever wrote the sol. its in good use :)

Quote:

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Originally posted by SkiNLaB
whats "Private stage%" do ??

edit: thanks 2 whoever wrote the sol. its in good use :)

---

Nice sig :D :D

VB Mods...might want to fix that...or encrypt the data :-)

Quote:

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Originally posted by jhermiz
Nice sig :D :D

VB Mods...might want to fix that...or encrypt the data :-)

---

they already pulled me up about it, and told me to add "Ignoring arc" so that the user was aware what the link was doing...

Quote:

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Originally posted by SkiNLaB
they already pulled me up about it, and told me to add "Ignoring arc" so that the user was aware what the link was doing...

---

whose arc ?

Quote:

---

Originally posted by jhermiz
whose arc ?

---

an [edited by moderator] right wing [edited by moderator] who thinks that every american should live like a king and [edited by moderator] the rest of the world. :rolleyes:

thats if my memory serves me correctly.

Listening.