Expand All Nodes in Treeview

[Colin]

By pressing the * key when the root node is selected in a treeview, all
sub-nodes will be expanded.

How do I do this programmatically? Preferably in vb, but ny help
appreciated.

[David Lowndes]

Colin,

The only easy way I've seen of doing this is to fake the '*' key being
pressed. The hard way is to write a recursive routine to expand each
child node.

Dave
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[Colin]

Yes I've done the recursive routine and it takes far too long - presumably
because the treeview redraws for every expansion

Any more ideas?

"David Lowndes" <dav...@mvps.org> wrote in message
news:k6h3ss86lb27vm33c...@4ax.com...

[David Lowndes]

>Yes I've done the recursive routine and it takes far too long - presumably
>because the treeview redraws for every expansion

If you don't want the re-draw, have you tried using WM_SETREDRAW
around your code?

[webguy]

I don't know that much about vb(i use c++ and mfc) but i do know you use
functions and use event handlers so check in the keydown or keyup handler to
see if the "*" is being hit if so use a function to recursive expand or look
in vb doc on MSDN for a function that does this in vb(mfc with c++ has a
function call ExpandAl() and it is very quick). Well sorry you have to do
the search but that all the time I have because I still have mfc trouble...

David Lowndes <dav...@mvps.org> wrote in message

news:lhu3ss8odo0rrcenv...@4ax.com...

>
> >Yes I've done the recursive routine and it takes far too long -
presumably
> >because the treeview redraws for every expansion
>
> If you don't want the re-draw, have you tried using WM_SETREDRAW
> around your code?
>

[Jens Schacherl]

You can send the TVM_EXPAND message to the control:
SendMessage(hWndTreeCtrl, TVM_EXPAND, (WPARAM)nCode, (LPARAM)hTreeItem);

The possible values for nCode are described in MSDN for
CTreeCtrl::Expand function.

HTH, Jens

Colin schrieb:

[bli...@my-deja.com]

to simulate this in code, do:

m_treeCtrl.SendMessage(WM_KEYDOWN, (WPARAM)VK_MULTIPLY, (LPARAM)0);

It simulates the '*' action...only make sure you select the root node
first.

-Jeff

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