[R-gui] Editor in R and Windows focus problems

[James Wettenhall]

Not sure if my previous post about Tk/Windows focus problems as 
applied to Editors got through. Reiterated at the bottom of 
this email.

Søren, 

Great start with the Tcl/Tk editor for R.  A bit more
work to do to compete with some of the sophisticated editors at
http://www.sciviews.org/_rgui/projects/Editors.html

but I think it's worth doing!

You may want to try the command:
tksearch(txt,"foo","0.0","end")
to search for "foo" between line 0, column 0 of the text widget
and the end.  A result like "4.5" means "foo" was found on line
4, column 5.  This could be useful for parenthesis matching.

tkindex(txt,"insert") should give you the current cursor 
position.

WINDOWS FOCUSING PROBLEMS

While I think a Tcl/Tk IDE/script editor for R is a great idea,
Windows users may be concerned about the problem of Tk windows
repeatedly hiding behind the RGui window (or RGui/GraphApp 
stealing the focus).  This is particularly a problem if I have 
my Windows taskbar on autohide.  When I move my mouse from the 
taskbar to the (maximized) RGui window, the taskbar disappears 
but so do any Tk windows run from R.  

I'm trying to look into the GraphApp code to see if I can find 
any clues.  Maybe one ugly way would be :

tktoplevel(use=GraphAppRConsoleWindowID)

where that window ID would have to be made 
available from the C code in R-devel/src/gnuwin32/  ???

>From the Tk toplevel help...

Command-Line Name: -use 
Database Name: use 
Database Class: Use 
This option is used for embedding. If the value isn't an empty 
string, it must be the the window identifier of a container 
window, specified as a hexadecimal string like the ones returned 
by the winfo id command. The toplevel widget will be created as 
a child of the given container instead of the root window for 
the screen. If the container window is in a Tk application, it 
must be a frame or toplevel widget for which the -container 
option was specified. This option may not be changed with the 
configure widget command. 


Regards,
James