Deja vue ActiveX bug with DBI-tech ctTree control

[rmcgaffic]

Last year, we confirmed that Alpha Five had a bug with the double click event for Codejock’s Xtreme CalendarPro control. Alpha fixed this problem in V10. I had hoped problems of this sort were behind us.

Now I’ve encountered what looks like a similar bug, this time with DBI-Tech’s ctTree ActiveX control, version 9.0, the latest and greatest.

The problem is that Alpha Five is again doing nothing when an event is triggered.

Screenprint 1 shows an unexpanded tree

Scrrenprint 2 shows an expanded tree after clicking on the Expand all button with the following code behind it. The tree now appears as successfully expanded.

ctTree1.NodeExpanded[0] = .T.
ctTree1.NodeExpanded[1] = .T.
ctTree1.NodeExpanded[2] = .T.
ctTree1.NodeExpanded[3] = .T.
ctTree1.NodeExpanded[4] = .T.	
ctTree1.NodeExpanded[5] = .T.

When the exact same code is placed behind the ClickClip event and the node picture, shown with the magenta background, is clicked --Nothing!

function clickclip as v (nIndex as N)
  ctTree1.NodeExpanded[0] = .T.
  ctTree1.NodeExpanded[1] = .T.
  ctTree1.NodeExpanded[2] = .T.
  ctTree1.NodeExpanded[3] = .T.
  ctTree1.NodeExpanded[4] = .T.	
  ctTree1.NodeExpanded[5] = .T.
end function

This function was created by right clicking on the control, and inserting the cut and paste code into an empty function that Alpha Five had already created.

The documentation provides the following description for this event:

Description
Occurs when a node picture is clicked.
Syntax
Visual Basic 
Public Event ClickClip( _
   ByVal nIndex As Long _
)
Parameters
nIndex 
The 0-based index value of the node being clicked. 
Remarks
This event will only fire when a node picture is clicked on.  
Node pictures can be defined through the NodePicture property
or the AddPictureNode and AddPictureFontNode methods.

Because I want a bullet to be shown for all lines, I am trying to get the ClickClip event to work, rather than relying on the typical +/- picture which displays only for nodes which have children.

I’ve attached a zipped database (A5V10) and would be grateful if anyone else could confirm this problem before filing a bug report.

A free 30 day evaluation of Studio Controls for COM 9.0 is available from www.dbi-tech.com.

Bob McGaffic
Pittsburgh, PA

[rmcgaffic]

Re: Deja vue ActiveX bug with DBI-tech ctTree control

Mystery solved.

When I replicated the problem above with MS Access in addition to Alpha Five, I filed a support incident with dbi-tech.

A node can have Plus/Minus pictures, Open/Close pictures -- which is what my screen print shows. But in addition, each node can have yet another picture and that is the only one which works with the ClickClip event.

In short, what I was trying to do, can not be done. I'm now going to explore ActiveX control TList and see if I can make this work.

As explained in their explanation below:

 The ClickClip event will only fire when a node picture is clicked 
on.  A node picture is defined as a picture either assigned to a node 
using the NodePicture property, or a picture assigned to a node as
it was added, using the AddPictureNode or AddPictureFontNode methods.

The event is not designed to fire when clicking on the Open or Close 
pictures, as they are not node pictures.

for any additional information on this event, please see the ctTree 
help file.

Take care and have a nice day!

[Tom Cone Jr]

Re: Deja vue ActiveX bug with DBI-tech ctTree control

Robert, thanks for giving us the solution to the mystery, and for letting us know that Alpha Five was not responsible for the limitations you were trying to overcome.