Using a mouse with strn and xterm.

	When strn is run from inside an xterm window, it can use the
mouse to select entries in the thread selector or scan modes.  To use
the mouse, move the mouse pointer to an entry and press a mouse
button.  Strn will (usually) respond when the mouse button is released.

Default mouse setup:
Button 1 (Left):
    In group or help scan modes:
	Use the current entry immediately.
	(Read a newsgroup, enter a menu, or read a help file.)
    In the thread selector, virtual scan mode, or article scan mode:
	Mark the current entry for later reading.
	(In the thread selector, type TAB to read marked entries now.
	 In the scan modes, type the SPACE bar to read all marked entries.)

Button 2 (Middle):
    Move the strn pointer to the entry that the mouse is pointing to.

Button 3 (Right):
    Move to the next or previous page.
    If the mouse pointer is in the top half of the screen, move to the
    previous page.  If it is in the bottom half, move to the next page.

How to tell strn to use the mouse:
	Strn will normally use the mouse if the first 5 letters of the
"TERM" variable are "xterm".  The strn configuration editor (type 'e'
in either group scan mode or the old newsgroup selector) can be used
to change this behavior.  The mouse-tracking option is in the
"Miscellaneous" menu.

Future plans:
	Sometime (soon?) I hope to extend the strn mouse routines to add
many more functions.  These functions will be selectable using the
online configuration editor.  If anyone has any ideas for more
features, send them to me.  (You might want to read the technical
section below first.)

Technical stuff:
[This is mostly useful for people who might want to implement simple
 mouse tracking in other programs.]
	The strn mouse-handling code uses an obscure xterm feature
called "mouse tracking", documented in "ctlseqs.ms" in the xterm
distribution.  In short, after enabling mouse tracking with a control
sequence, the xterm will send a control sequence whenever a mouse
button is pressed or released.  This sequence includes:
    o Which button was pressed (0,1,2 or 3 for button release)
    o The X and Y coordinates of the mouse, measured in characters within
      the window.
[Expand on this later?]
	For more information on the mouse tracking codes, contact
caadams@access.digex.net.
