The online timer has been modified for testing whether the online connection is
still valid. If the connection is broken, the timer tests the connection every
second until it has reconnected.  When the connection is finally remade, any
online histograms will again be refreshed as before.  This is now being done
with just the original timer, as 2 timers seem to conflict with each other.

Fixed segmentation fault problems that occurred when connected online, then
having the connection broken, then re-establishing the connection, and then
clicking on an online item in the main window.  The problem is in TGListTree in
the ROOT code, and is fixed here by including 2 routines into MTGListTree.

Roody can now reset online histograms via context menu or main menu.  This
requires a small change in mana.c  Also, fixed a problem with segmentation
faults when trying to connect to an invalid server port.

The group context menu options are changed to "Draw group", "Reset group" and
"Delete group", where "Reset group" means reset any online members of the group
and will only appear if there are online members in that group.  Multiple
selections (left click while holding down the control key) now have a context
menu (right click to open) but the context menu for multiple selections will
only display "New canvas", "Add to group" and, if there are online members,
"Reset", since the options "Current pad", "Overlay on pad" and "Next pad" are
not relevant to multiple selections.  Online folders now have a context menu
with "New canvas", "Add to group" and "Reset" options.

> Roody can now reset online histograms via context menu or main menu.  This
> requires a small change in mana.c  Also, fixed a problem with segmentation
> faults when trying to connect to an invalid server port.

I saw that you implemented a "Reset" function in root_server_thread. This is not
necessary. You have the more general "Command" function which was meant for that.
You specify the object name, type, method to execute and optional arguments. Right
now, only the "Reset" command is implemented, but that's what you need. Can you
check if roody works with that? If so, can you remove the "Reset" function again ? 

Thanks,

  Stefan

The reset option has been modified to use the new "Command" option in mana.c
instead of the "Reset" option in mana.c, which has been removed.

A memory leak was fixed in Roody.cxx, which occurred when updating a histogram
from a NetFolder object.

1) Memory leak fixed:
 when the plotting destination set to replace, cloned objects with the canvas
 about to be closed are now being deleted first.
2) Group restore fixed:
 when restoring a saved session, and objects from file subdirectories were
 added to a group, they were not being included in that group.  Now the
 data file is searched recursively for subdirectories.
3) Group draw fixed:
 TH2 and TH3 objects in a group were not being drawn.

Fixed refreshing of overlayed online histograms.
Fixed refresh now.
main.cxx:  class Roody now created on the stack instead of the heap.
TNetFolder.cpp:  fixed memory leak relating to TMessage pointer
                 returned by TSocket::Recv( TMessage * )
                 ?? is this related to the memory leak in the analyzer ??

Error messages from Roody will now appear as TGMsgBox forms which require the
user to click the "Dismiss" button to acknowledge the error message.  If the
user chooses the x-axis scales for an online histogram using the mouse to select
a range on the axis, that range will be used for re-displaying the histogram
when it is refreshed. However, if the user chooses "XaxisLimits" from the
context menu, that x-axis scaling will be used for all pads on that canvas, and
a range as described above will be overridden by this scaling.

Problems with deciding which graphics pad to choose for drawing have been fixed.
 Now the group pads (created by choosing draw group from the group context menu)
and the zoom pad (created by choosing zoom option from the pad context menu) are
treated distinctly from the canvases titled "canvasN" for N=0,1,2,...  Also, a
user supplied zone setting will be displayed in the zones menu, and can be
chosen again later.  Problems with the cvs file locks have been repaired (by
P.Amaudruz).