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mathieumg
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O.P. TreeView
What I understand from my search is that the only way there is to interact with a TreeView control at the moment is to use the Win32 API? Is that correct? How would I go about say, adding a few options to a TreeView and detecting when there is a click done on one item (along with its ID/index)? (Those are the only things I would need to do with the control)
Is there a script in the DB that already does that? I could take a look at it since I'm self-taught.
Thanks for the help.
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| 07-19-2009 11:19 PM |
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matty
Scripting Guru
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RE: TreeView
You need to subclass the window and fill the TVITEM structure normally from NMHDR. I have some code at home I can post if no one posts anything in the next while.
The attachment is taken from the Log Manager script by Matti.
 Attachment: _treeView.zip (2.32 KB)
This file has been downloaded 146 time(s).
This post was edited on 07-20-2009 at 12:40 PM by matty.
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| 07-20-2009 12:38 PM |
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mathieumg
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O.P. RE: TreeView
Thanks, I'll take a look into that Official MessengerPlus! Live French Translator
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| 07-20-2009 05:21 PM |
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mathieumg
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O.P. RE: TreeView
I got it to work
However, I still need help with some API functions 
In my code I am at the point where I know when TVN_SELCHANGED has happened.
I want to go further and get its NMTREEVIEW structure and from it, get the the TVITEM both from itemOld and itemNew. Then, I want to get the handle of both these TVITEM structures and I should have everything I need to do what I intend to do.
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| 07-21-2009 02:52 AM |
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mathieumg
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O.P. RE: TreeView
Do you know where I could find help for STRUCTS in JScript? It's kind of hard to ask help about this on other forums when it has to use the Plus! Interop and Databloc objects.
Thanks
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| 07-26-2009 01:48 PM |
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matty
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RE: TreeView
There aren't any documented structures unless they are used in scripts (in which you need to then search the code).
Really your only option is to calculate the size itself.
Data types : Size
- Byte : 1
- Integer : 2
- Long : 4
- String : 4
- Variant : 8
If you have Visual Basic 6 installed you can cheat and declare a variable as a specific structure then do MsgBox Len  and it will tell you the size of the structure. |
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| 07-26-2009 02:36 PM |
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mathieumg
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O.P. RE: TreeView
I would need some help to get started with the NMTREEVIEW I talked about in my post above, here is what I have:
JScript code:
function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
switch (Message) {
case WM_NOTIFY:
var NMHDR = Interop.Allocate(12);
Interop.Call('kernel32', 'RtlMoveMemory', NMHDR.DataPtr, lParam, 12);
if (NMHDR.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
switch(NMHDR.ReadDWORD(8)) {
case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
//TreeView selection changed
Debug.Trace("TreeView selection changed:");
//Now I want to get the NMTREEVIEW structure and from it, get the the TVITEM both from itemOld and itemNew. Then, I want to get the handle of both these TVITEM structures
break;
}
}
NMHDR.Size = 0;
break;
}
}
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| 07-26-2009 03:50 PM |
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matty
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RE: TreeView
Javascript code:
function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
switch (Message) {
case WM_NOTIFY:
var NMHDR = Interop.Allocate(12);
Interop.Call('kernel32', 'RtlMoveMemory', NMHDR.DataPtr, lParam, 12);
if (NMHDR.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
switch(NMHDR.ReadDWORD(8)) {
case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
var NMTREEVIEW = Interop.Allocate(104);
Interop.Call('kernel32', 'RtlMoveMemory', NMTREEVIEW.DataPtr, lParam, 104);
/*
NMTREEVIEW
NMHDR : 0-12
Action : 12-16
TVITEM (itemOld) : 16-56
TVITEM (itemNew) : 56-96
POINT : 96-104
*/
break;
}
}
NMHDR.Size = 0;
break;
}
}
However in theory you could just do this:
Javascript code:
function OnWndSettingsEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
switch (Message) {
case WM_NOTIFY:
var NMTREEVIEW = Interop.Allocate(104);
Interop.Call('kernel32', 'RtlMoveMemory', NMTREEVIEW.DataPtr, lParam, 104);
if (NMTREEVIEW.ReadDWORD(0) == PlusWnd.GetControlHandle("TrvSettingGroups")) {
switch(NMTREEVIEW.ReadDWORD(8)) {
case TVN_SELCHANGEDW: case TVN_SELCHANGEDA:
/*
NMTREEVIEW
NMHDR : 0-12
Action : 12-16
TVITEM (itemOld) : 16-56
TVITEM (itemNew) : 56-96
POINT : 96-104
*/
break;
}
}
NMTREEVIEW.Size = 0;
break;
}
}
This post was edited on 07-27-2009 at 12:32 PM by matty.
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| 07-26-2009 04:25 PM |
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mathieumg
Full Member
Posts: 181
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Joined: May 2004
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O.P. RE: TreeView
After that, do I do
JScript code:
var itemOld = NMTREEVIEW.ReadDWORD(16);
var itemNew = NMTREEVIEW.ReadDWORD(56);
And then some code to read the handle for both structures? (I tried itemOld.ReadDWORD(4) to no avail)
I presume that is not exactly the right way to do, that is why I need help with this 
Thank you again for helping me, I will certainly learn a lot out of this
Edit:
I wasn't that far after all I got it and I also started to understand some code in the treeview class
Thanks a lot for the help matty!
Here is my code:
JScript code:
var hOldItem = NMTREEVIEW.ReadDWORD(20);
var hNewItem = NMTREEVIEW.ReadDWORD(60);
This post was edited on 07-26-2009 at 10:31 PM by mathieumg.
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| 07-26-2009 09:27 PM |
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matty
Scripting Guru
Posts: 8336
Reputation: 109
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Joined: Dec 2002
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RE: TreeView
No problem!
Glad you got it working!
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| 07-27-2009 12:31 PM |
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