tkx11vnc

#!/bin/sh
# the next line restarts using wish. \
exec wish "$0" "$@"
catch {rename send {}}
#
# Copyright (c) 2004-2005 Karl J. Runge <runge@karlrunge.com>
# All rights reserved.
#
#  This is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This software is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this software; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
#  USA.

#
# tkx11vnc v0.1
# This is a simple frontend to x11vnc.  It uses the remote control
# and query features (-remote/-query aka -R/-Q) to interact with it. 
# It is just a quick-n-dirty hack (it parses -help output, etc), but
# it could be of use playing with or learning about the (way too) many
# parameters x11vnc has.
# 
# It can be used to interact with a running x11vnc (see the x11vnc
# -gui option), or to set the parameters and then start up x11vnc.  
# 

#
# Below is a simple picture of how the gui should be laid out and how
# the menus should be organized.  Most menu items correspond to remote
# control commands. A trailing ":" after the item name means it is a string
# to be set rather than a boolean that can be toggled (e.g. the entry
# box must be used).
#
# Some tweak options may be set in the prefix "=" string.
#	A means it is an "Action" (not a true variable)
#	R means it is an action only valid in remote mode.
#	S means it is an action only valid in startup mode.
#	Q means it is an action worth querying after running.
#	P means the string can be +/- appended/deleted (string may not
#         be the same after the remote command)
#	G means gui internal item
#	F means can be set via file browse
#	D means for simple gui
#	-C:val1,... means it will be a checkbox (radio button)
#	   the "-" means no other options follow
#	0 means to skip the item.
#	-- means add a separator
#
proc set_template {} {
	global template
	set template "
Row: Actions   Clients   Permissions  Keyboard    Pointer  Help
Row: Displays  Screen    Tuning       Debugging   Misc

Actions
	=SA start
	=RA stop
	=DGA attach
	=DRA detach
	--
	=RA ping
	=RA update-all
	=GA clear-all
	-- D
	=DRA stop+quit 
	=DGA Quit 

Help
	=DGA gui
	=GA all

Clients
	=DRQA current:
	=DF   connect:
	=DRQA disconnect:
	--
	accept:
	gone:
	vncconnect
	-- D
	=D http
	httpdir:
	httpport:
	enablehttpproxy

Displays
	=D display:
	=F auth:
	=D desktop:
	=D rfbport:
	=0 gui:

Screen
	=DRA refresh
	=RA reset
	=DRA blacken
	-- D
	id:
	sid:
	=D scale:
	scale_cursor:
	--
	overlay
	overlay_nocursor
	--
	=D solid
	solid_color:
	visual:
	flashcmap
	shiftcmap:
	notruecolor
	--
	=P blackout:
	xinerama
	clip:
	rawfb:
	--
	= xrandr
	=-C:resize,newfbsize,exit xrandr_mode:
	padgeom:

Keyboard
	=D norepeat
	=D add_keysyms
	skip_keycodes:
	modtweak
	xkb
	--
	=FP remap:
	--
	clear_mods
	clear_keys

Pointer
	=D-C:none,arrow,X,some,most cursor:
	=-C:1,2,3,4,5,6 arrow:
	--
	cursorpos
	=D nocursorshape
	--
	noxfixes
	noalphablend
	alphacut:
	alphafrac:
	alpharemove
	--
	buttonmap:
	--
	xwarppointer

Misc
	=GD simple-gui
	-- D
	=F rc:
	norc
	--
	nofb
	--
	=D nobell
	=D nosel
	noprimary
	nolookup
	--
	xtrap
	--
	bg
	=-C:ignore,exit sigpipe:
	=0 inetd
	rfbwait:
	--
	=RA remote-cmd:
	=GA all-settings

Debugging
	debug_pointer
	debug_keyboard
	=F logfile:
	=GA show-logfile
	=GA tail-logfile
	quiet
	--
	=GA show-start-cmd
	=DG debug_gui

Permissions
	=DRQA lock
	=DRQA unlock
	=SQA deny_all
	--
	=DFP allow:
	=D localhost
	=RA allowonce:
	listen:
	-- D
	=RA noremote
	--
	=D viewonly
	=D shared
	=D forever
	timeout:
	--
	input:
	--
	=S alwaysshared
	=S nevershared
	=S dontdisconnect
	--
	viewpasswd:
	=F passwdfile:
	=0 storepasswd
	=F rfbauth:
	passwd:
	--
	safer
	unsafe

Tuning
	=D-C:0,1,2,3,4 pointer_mode:
	input_skip:
	=D nodragging
	--
	noshm
	flipbyteorder
	onetile
	-- D
	speeds:
	=D wait:
	defer:
	=D nap
	screen_blank:
	--
	fs:
	gaps:
	grow:
	fuzz:
	snapfb
	--
	xdamage
	xd_area:
	xd_mem:
	--
	threads
	--
	progressive:
"
}

proc set_internal_help {} {
	global helptext helpall

	# set some internal item help here:
	set helptext(start) "
Launch x11vnc with the settings you have prescribed in the gui.
The x11vnc process is started in an xterm window so you can see the
output, kill it, etc.
"

	set helptext(show-start-cmd) "
Displays in the text area what the x11vnc start command (i.e. the command
run by \"Actions -> start\") looks like for the current values of the
settings.  This can be done even in the attached state.  Intended for
debugging the gui.  The help item for \"Actions -> start\" gives the
same info.
"

	set helptext(debug_gui) "
Set debug_gui to get more output printed in the text area.
"

	set helptext(detach) "
No longer be associated with the x11vnc server.  Switch to non-connected
state.
"

	set helptext(attach) "
Attach to the x11vnc server, if possible.  Switches to connected state
if successful.  To change or set the X display use \"Displays -> display\"
"

	set helptext(ping) "
Check if x11vnc still responds to \"ping\" remote command.
"

	set helptext(update-all) "
Query the x11vnc server for the current values of all variables.
Populate the values into the gui's database.

Normally the gui will refresh this info every time it interacts
with the x11vnc server, so one doesn't need to use this action
very often (unless something else is changing the state of the
x11vnc server, or new clients have connected, etc).
"

	set helptext(clear-all) "
Forget any variable settings either entered in by you or retrieved
from a running x11vnc server.  Basically sets everything to 0 or
the string (unset).
"

	set helptext(all-settings) "
Displays the gui's database of all of the x11vnc server's current
settings.  Use \"Actions -> update-all\"  or \"Control+R\" to
refresh this list if it ever gets out of sync.
"

	set helptext(remote-cmd) "
Run a remote command (-R) or query (-Q) directly.  Only a few
remote commands are not on a menu, but for those few you can
run the command directly this way.  Just enter the command into
the Entry box when prompted.  Use the prefix \"Q:\" to indicate
a -Q query.  Examples: \"zero:20,20,100,100\", \"Q:ext_xfixes\"  
"

	set helptext(stop+quit) "
Send the stop command to the x11vnc server, then terminate the tkx11vnc gui.
"

	set helptext(show-logfile) "
View the current contents of the logfile (if it exists and is accessible
by the gui process).
"

	set helptext(tail-logfile) "
Run the tail(1) command with -f option on the logfile in an xterm.
"

	set helptext(Quit) "
Terminate the tkx11vnc gui.  Any x11vnc servers will be left running.
"

	set helptext(current) "
Shows a menu of currently connected VNC clients on the x11vnc server.

Allows you to find more information about them, change their input
permissions, or disconnect them.

You will be prompted to confirm any disconnections.
"

	set helptext(client) "
After selecting a VNC client from the \"Clients -> current\" menu,
you will be presented with a dialog that shows the information
about the VNC client.

You can chose to disconnect the client by clicking on the 
\"Disconnect\" checkbox and pressing \"OK\".  There will be a
confirmation dialog to doublecheck.

Alternatively, you can fine tune the VNC client's input permissions
by selecting any of the Keystrokes, Mouse Motion, or Button Clicks
checkboxes and pressing \"OK\".  This is like the \"-input\" option
but on a per-client basis.

To not change any aspects of the VNC client press \"Skip\".
"

	set helptext(solid_color) "
Set the -solid color value.
"

	set helptext(xrandr_mode) "
Set the -xrandr mode value.
"

	set helptext(simple-gui) "
Toggle between menu items corresponding the most basic ones
and all possible settings.  I.e. toggle between a simple gui
and one for power users.
"

	set helptext(all) $helpall

	set helptext(gui) "
tkx11vnc is a simple frontend to x11vnc.  Nothing fancy, it merely
provides an interface to each of the many x11vnc command line options and
remote control commands.  See \"Help -> all\" for much info about x11vnc.

All menu items have a (?) button one can click on to get more information
about the option or command.

There are two states tkx11vnc can be in:

	1) Available to control a running x11vnc process.
	2) Getting ready to start a x11vnc process.

In state 1) the Menu items available in the menus are those that
correspond to the x11vnc \"remote control\" commands.  See the -remote
entry under \"Help -> all\" for a complete list.  Also available is
the \"Actions -> stop\" item to shut down the running x11vnc server,
thereby changing to state 2).  One could also simply \"Actions -> detach\"
leaving the x11vnc server running.  \"Actions -> attach\" would
reestablish the connection.

In state 2) the Menu items available in the menus (Actions, Clients,
etc.) are those that correspond to command line options used in starting
an x11vnc process, and the \"Actions -> start\" item executes
x11vnc thereby changing to state 1).  To see what x11vnc startup command
you have built so far, look at the (?) help for  \"Actions -> start\"
and it will show you what the command looks like.

There is much overlap between the menu items available in state 1)
and state 2), but it is worth keeping in mind it is not 100%.
For example, you cannot set passwords or password files in state 1).


Also note that there may be *two* separate X displays involved, not just
one:  1) the X display x11vnc will be polling (and making available to
VNC viewers), and 2) the X display this GUI is intended to display on.
For example, one might use ssh to access the remote machine where the
GUI would display on :11 and x11vnc would poll display :0.  By default
the gui will display on the value in the DISPLAY env. variable followed
by the value from the -display option.  To override this, use something
like: \"-gui otherhost:0\", etc.


GUI components: 
--- ----------

1) At the top of the gui is a info text label where information will
be posted, e.g. when traversing menu items text indicating how to get
help on the item and its current value will be displayed.

2) Below the info label is the area where the menu buttons, Actions,
Clients, etc., are presented.  If a menu item has a checkbox,
it corresponds to a boolean on/off variable.  Otherwise it is
either a string variable, or an action not associated with a
variable (for the most part).

3) Below the menu button area is a text label indicating the current x11vnc
X display being polled and the corresponding VNC display name.  Both
will be \"(*none*)\" when there is no connection established.

4) Below the x11 and vnc displays text label is a text area there scrolling
information about actions being taken and commands being run is displayed.
To scroll click in the area and use PageUp/PageDown or the arrow keys.

5) At the bottom is an entry area.  When one selects a menu item that
requires supplying a string value, the label will be set to the
parameter name and one types in the new value.  Then one presses the
\"OK\" button or presses \"Enter\" to set the value.  Or you can press
\"Skip\" or \"Escape\" to avoid changing the variable.  Some variables
are boolean toggles (for example, \"Permissions -> viewonly\") or Radio
button selections.  Selecting these menu items will not activate the
entry area but rather toggle the variable directly.


Cascades Bug: There is a bug not yet worked around for the cascade menus
where the (?) help button gets in the way.  To get the mouse over to
the cascade menu click and release mouse to activate the cascade, then
you can click on its items.  Dragging with a mouse button held down will
not work (sorry!).


Key Bindings:

	In the Text Area: Control-/ selects all of the text.
	Anywhere: Control-d invokes \"Actions -> detach\"
	Anywhere: Control-a invokes \"Actions -> attach\"
	Anywhere: Control-p invokes \"Actions -> ping\"
	Anywhere: Control-u and Control-r invoke \"Actions -> update-all\"


Misc:

Since x11vnc has so many settings and to avoid further confusion,
the libvncserver options:

	-alwaysshared
	-nevershared
	-dontdisconnect

are not available for changing in a running x11vnc (even though it
is feasible).  These options overlap with the x11vnc options -shared
and -forever which are hopefully enough for most usage.  They may be
specified for x11vnc startup if desired.

"

global beginner_mode
if {$beginner_mode} {
	set helptext(gui) "
tkx11vnc is a simple frontend to x11vnc.  It is currently running in
\"ez\" or \"simple\" mode.  For many more options run it in normal
mode by toggling \"Misc -> simple_gui\".

All menu items have a (?) button one can click on to get more information
about the option or command.

GUI components: 
--- ----------

1) At the top of the gui is a info text label where information will
be posted, e.g. when traversing menu items text indicating how to get
help on the item and its current value will be displayed.

2) Below the info label is the area where the menu buttons, Actions,
Clients, etc., are presented.  If a menu item has a checkbox,
it corresponds to a boolean on/off variable.  Otherwise it is
either a string variable, or an action not associated with a
variable (for the most part).

3) Below the menu button area is a text label indicating the current x11vnc
X display being polled and the corresponding VNC display name.  Both
will be \"(*none*)\" when there is no connection established.

4) Below the x11 and vnc displays text label is a text area there scrolling
information about actions being taken and commands being run is displayed.
To scroll click in the area and use PageUp/PageDown or the arrow keys.

5) At the bottom is an entry area.  When one selects a menu item that
requires supplying a string value, the label will be set to the
parameter name and one types in the new value.  Then one presses the
\"OK\" button or presses \"Enter\" to set the value.  Or you can press
\"Skip\" or \"Escape\" to avoid changing the variable.  Some variables
are boolean toggles (for example, \"Permissions -> viewonly\") or Radio
button selections.  Selecting these menu items will not activate the
entry area but rather toggle the variable directly.


Cascades Bug: There is a bug not yet worked around for the cascade menus
where the (?) help button gets in the way.  To get the mouse over to
the cascade menu click and release mouse to activate the cascade, then
you can click on its items.  Dragging with a mouse button held down will
not work (sorry!).

"
}

}

proc center_win {w} {
	wm withdraw $w
	set x [expr [winfo screenwidth  $w]/2 - [winfo reqwidth  $w]/2];
	set y [expr [winfo screenheight $w]/2 - [winfo reqheight $w]/2];
	wm geom $w +$x+$y
	wm deiconify $w
	update
}

proc textwidth {text} {
	set min 0;
	foreach line [split $text "\n"] {
		set n [string length $line]
		if {$n > $min} {
			set min $n
		}
	}
	return $min
}

proc textheight {text} {
	set count 0;
	foreach line [split $text "\n"] {
		incr count
	}
	return $count
}

proc set_name {name} {
	wm title    . "$name"
	wm iconname . "$name"
}

proc make_toplevel {w {title ""}} {
	catch {destroy $w}
	toplevel  $w;
	bind $w <Escape> "destroy $w"
	if {$title != ""} {
		wm title    $w $title
		wm iconname $w $title
	}
}

proc textwin {name title text} {
	global max_text_height max_text_width
	global bfont ffont

	set width  [textwidth $text]
	incr width
	if {$width > $max_text_width} {
		set width $max_text_width
	}
	set height [textheight $text]
	if {$height > $max_text_height} {
		set height $max_text_height
	}

	set w ".text_$name"
	make_toplevel $w $title

	frame     $w.f -bd 0;
	pack      $w.f -fill both -expand 1
	text      $w.f.t -width $width -height $height -setgrid 1 -bd 2 \
			-yscrollcommand "$w.f.y set" -relief ridge \
			-font $ffont;
	scrollbar $w.f.y -orient v -relief sunken -command "$w.f.t yview";
	button    $w.f.b -text "Dismiss" -command "destroy $w" -font $bfont \
			-pady 2

	$w.f.t insert 1.0 $text;

	bind $w <Enter> "focus $w.f.t"

	wm withdraw $w
	pack $w.f.b -side bottom -fill x 
	pack $w.f.y -side right -fill y;
	pack $w.f.t -side top -fill both -expand 1;
	update

	center_win $w
}

proc active_when_connected {item} {
	global helpremote helptext

	if {[opt_match G $item]} {
		return 1
	} elseif {[opt_match R $item]} {
		return 1
	} elseif {[opt_match S $item]} {
		return 0
	} elseif {[is_action $item]} {
		if {[opt_match R $item]} {
			return 1
		} else {
			return 0
		}
	} elseif {[info exists helpremote($item)]} {
		return 1
	} else {
		return 0
	}
}

proc active_when_starting {item} {
	global helpremote helptext beginner_mode

	if {$beginner_mode} {
		if {[opt_match G $item]} {
			return 1
		}
		if {$item == "display"} {
			return 1
		}
		if {$item == "debug_gui"} {
			return 1
		}
		return 0
	}

	if {[opt_match G $item]} {
		return 1
	} elseif {[opt_match S $item]} {
		return 1
	} elseif {[opt_match R $item]} {
		return 0
	} elseif {[is_action $item]} {
		if {[opt_match S $item]} {
			return 1
		} else {
			return 0
		}
	} elseif {[info exists helptext($item)]} {
		return 1
	} else {
		return 0
	}
}

proc help_win {item} {
	global helptext helpremote menu_var
	global query_ans query_aro
	global beginner_mode

	set ok 0
	set text "Help on $item:\n\n"

	if {[is_gui_internal $item]} {
		if {$item != "gui" && $item != "all"} {
			append text "    + Is a gui internal Action (cannot be set).\n";
		}
	} elseif {[is_action $item]} {
		append text "    + Is a remote control Action (cannot be set).\n";
	} elseif {[active_when_connected $item]} {
		append text "    + Can be changed in a running x11vnc.\n";
	} else {
		append text "    - Cannot be changed in a running x11vnc.\n";
	}
	if {[is_gui_internal $item]} {
		;
	} elseif {[active_when_starting $item]} {
		append text "    + Can be set at x11vnc startup.\n";
	} else {
		if {! $beginner_mode} {
			append text "    - Cannot be set at x11vnc startup.\n";
		}
	}
	append text "\n"

	if {[info exists helptext($item)]} {
		append text "\n"
		if {[is_gui_internal $item]} {
			append text "==== x11vnc help: ====\n";
		} else {
			append text "==== x11vnc startup option help: ====\n";
		}
		append text "\n"
		append text $helptext($item)
		append text "\n"
		set ok 1
	}

	if {[info exists helpremote($item)]} {
		append text "\n"
		append text "==== x11vnc remote control help: ====\n";
		append text "\n"
		append text $helpremote($item)
		set ok 1
	}

	if {![is_action $item] && [info exists menu_var($item)]} {
		global unset_str
		append text "\n\n"
		append text "==== current $item value: ====\n";
		append text "\n"
		if {$menu_var($item) == ""} {
			append text "$unset_str\n"
		} else {
			append text "$menu_var($item)\n"
		}
		if {$item == "http" || $item == "httpdir" || $item == "httpport"} {
			global vnc_url;
			append text "\nURL: $vnc_url\n"
		}
	}

	if {$item == "start"} {
		set str [get_start_x11vnc_txt]
		append text $str
		append_text "$str\n"
		append text "\nPossible \$HOME/.x11vncrc settings for this command:\n\n"
		set rctxt [get_start_x11vnc_cmd 1]
		append text "$rctxt\n"
	}

	regsub -all { } $item " " name

	if {$ok} {
		textwin $name "x11vnc help: $item" "$text";
	}
	return $ok
}

proc parse_help {} {
	global env x11vnc_prog;
	global helpall helptext;

	set helppipe [open "| $x11vnc_prog -help" "r"];
	if {$helppipe == ""} {
		puts stderr "failed to run $x11vnc_prog -help";
		exit 1;
	}

	set sawopts 0;
	set curropt "";
	while {[gets $helppipe line] > -1} {
		append helpall "$line\n"	

		# XXX
		if {[regexp {^Options:} $line]} {
			set sawopts 1;
			continue;
		}
		# XXX
		if {[regexp {^These options} $line]} {
			continue;
		}

		if {! $sawopts} {
			continue;
		}
		if {[regexp {^-([A-z_][A-z_]*)} $line match name]} {
			set allnames($name) 1;
			if {"$curropt" != "no$name" && "no$curropt" != "$name"} {
				set curropt $name;
				set helptext($curropt) "$line\n";
			} else {
				append helptext($curropt) "$line\n";
			}
		} elseif {$curropt != ""} {
			append helptext($curropt) "$line\n";
		}
	}
	foreach name [array names allnames] {
		if {[regexp {^no} $name]} {
			regsub {^no} $name "" pair
		} else {
			set pair "no$name"
		}
		if {[info exists helptext($name)]} {
			if ![info exists helptext($pair)] {
				set helptext($pair) $helptext($name);
			}
		} elseif {[info exists helptext($pair)]} {
			if ![info exists helptext($name)] {
				set helptext($name) $helptext($pair);
			}
		}
	}

	set_internal_help
}

proc tweak_both {new old} {
	tweak_help $new $old
	tweak_remote_help $new $old
}

proc tweak_remote_help {new old} {
	global helpremote
	if ![info exists helpremote($new)] {
		if {[info exists helpremote($old)]} {
			set helpremote($new) $helpremote($old)
		}
	}
}

proc tweak_help {new old} {
	global helptext
	if ![info exists helptext($new)] {
		if {[info exists helptext($old)]} {
			set helptext($new) $helptext($old)
		}
	}
}

proc parse_remote_help {} {
	global helpremote helptext help_indent remote_name;

	set sawopts 0;
	set curropt "";
	set possopts "";
	set offset [expr $help_indent - 1];
	foreach line [split $helptext(remote) "\n"] {
		
		set line [string range $line $offset end];

		# XXX
		if {[regexp {^The following -remote/-R commands} $line]} {
			set sawopts 1;
			continue;
		}
		# XXX
		if {[regexp {^The vncconnect.*command} $line]} {
			set sawopts 0;
		}

		if {! $sawopts} {
			continue;
		}
		if {[regexp {^([A-z_][A-z_:]*)} $line match name]} {
			regsub {:.*$} $name "" popt
			lappend possopts $popt
			if {"$curropt" != "no$name" && "no$curropt" != "$name"} {
				set curropt $name;
				regsub {:.*$} $curropt "" curropt
				set remote_name($curropt) $name
				set helpremote($curropt) "$line\n";
			} else {
				append helpremote($curropt) "$line\n";
			}
		} elseif {$curropt != ""} {
			append helpremote($curropt) "$line\n";
		}
	}

	foreach popt $possopts {
		if {[info exists helpremote($popt)]} {
			continue
		}
		if {[regexp {^no} $popt]} {
			regsub {^no} $popt "" try
		} else {
			set try "no$popt"
		}
		if {[info exists helpremote($try)]} {
			set helpremote($popt) $helpremote($try)
		}
	}
}

proc parse_query_help {} {
	global query_ans query_aro query_ans_list query_aro_list helptext;

	set sawans 0;
	set sawaro 0;
	set ans_str ""
	set aro_str ""

	foreach line [split $helptext(query) "\n"] {

		if {! $sawans && [regexp {^ *ans=} $line]} {
			set sawans 1
		}
		if {! $sawans} {
			continue
		}

		if {[regexp {^ *aro=} $line]} {
			set sawaro 1
		}
		if {$sawaro && [regexp {^[ 	]*$} $line]} {
			set sawans 0
			break
		}

		regsub {ans=} $line "" line
		regsub {aro=} $line "" line
		set line [string trim $line]

		if {$sawaro} {
			set aro_str "$aro_str $line"
		} else {
			set ans_str "$ans_str $line"
		}
	}

	regsub -all {  *} $ans_str " " ans_str
	regsub -all {  *} $aro_str " " aro_str

	set ans_str [string trim $ans_str]
	set aro_str [string trim $aro_str]
	set query_ans_list [split $ans_str]
	set query_aro_list [split $aro_str]

	foreach item $query_ans_list {
		if {[regexp {^[ 	]*$} $item]} {
			continue
		}
		set query_ans($item) 1
	}
	foreach item $query_aro_list {
		if {[regexp {^[ 	]*$} $item]} {
			continue
		}
		set query_aro($item) 1
	}
}

proc in_debug_mode {} {
	global menu_var
	if {![info exists menu_var(debug_gui)]} {
		return 0
	}
	return $menu_var(debug_gui)
}

# Menubar utilities:
proc menus_state {state} {
	global menu_b

	foreach case [array names menu_b] {
		set menu_button $menu_b($case)
		$menu_button configure -state $state
	}
}

proc menus_enable {} {
	global menus_disabled

	menus_state "normal"
	set menus_disabled 0
}

proc menus_disable {} {
	global menus_disabled

	set menus_disabled 1
	menus_state "disabled"
}

# Entry box utilities:
proc entry_state {x state} {
	global entry_box entry_label entry_ok entry_help entry_skip entry_browse
	global old_labels
	if {$x == "all"} {
		if {!$old_labels} {
			$entry_label configure -state $state
		}
		$entry_box    configure -state $state
		$entry_ok     configure -state $state
		$entry_skip   configure -state $state
		$entry_help   configure -state $state
		$entry_browse configure -state $state
	} elseif {$x == "label"} {
		if {!$old_labels} {
			$entry_label configure -state $state
		}
	} elseif {$x == "box"} {
		$entry_box    configure -state $state
	} elseif {$x == "ok"} {
		$entry_ok     configure -state $state
	} elseif {$x == "skip"} {
		$entry_skip   configure -state $state
	} elseif {$x == "help"} {
		$entry_help   configure -state $state
	} elseif {$x == "browse"} {
		$entry_browse configure -state $state
	}
}

proc entry_enable {{x "all"}} {
	entry_state $x normal
}

proc entry_disable {{x "all"}} {
	entry_state $x disabled
}

proc entry_browse_button {{show 1}} {
	global entry_browse
	if {$show} {
		pack $entry_browse -side left
	}  else {
		pack forget $entry_browse
	}
}
proc entry_focus {} {
	global entry_box
	focus $entry_box
}
proc entry_select {} {
	global entry_box
	$entry_box selection range 0 end
}
proc entry_get {} {
	global entry_box
	return [$entry_box get]
}
proc entry_insert {str} {
	global entry_box
	entry_delete
	$entry_box insert end $str
	$entry_box icursor end
}
proc entry_delete {} {
	global entry_box
	$entry_box delete 0 end
}


# Utilities for remote control and updating vars.

proc push_new_value {item name new {query 1}} {
	global menu_var always_update remote_output query_output
	global delay_sleep extra_sleep extra_sleep_split
	global query_result_list

	set debug [in_debug_mode]

	set getout 0
	set print_getout 0;

	set do_query_all 0

	set newnew ""
	if {$item == "disconnect"} {
		set newnew "N/A"
		set do_query_all 1
	} elseif {$always_update} {
		set do_query_all 1
	}

	if {$item == "remote-cmd"} {
		# kludge for arbitrary remote command:
		if {[regexp {^Q:} $new]} {
			# extra kludge for Q:var to mean -Q var
			regsub {^Q:} $new "" new
			set qonly 1
		} else {
			set qonly 0
		}
		# need to extract item from new:
		set qtmp $new
		regsub {:.*$} $qtmp "" qtmp
		if {$qonly} {
			set rargs [list "-Q" "$qtmp"]
			set print_getout 1
			set qargs ""
		} else {
			set rargs [list "-R" "$new"]
			set qargs ""
		}
		set getout 1

	} elseif {[value_is_string $item]} {
		# string var:
		set rargs [list "-R" "$name:$new"]
		set qargs [list "-Q" "$name"]
	} else {
		# boolean var:
		set rargs [list "-R" "$name"]
		set qargs [list "-Q" "$name"]
	}

	if {! $query && ! $always_update} {
		set getout 1
	} elseif {$item == "noremote"} {
		set getout 1
	} elseif {[is_action $item] && ![opt_match Q $item] && $rargs != ""} {
		set getout 1
	} elseif {[regexp {^(sid|id)$} $item] && ![regexp {^0x} $new]} {
		set getout 1
	}

	set remote_output ""
	set query_output ""

	if {!$debug} {
		append_text "x11vnc $rargs ..."
	}

	if {$getout} {
		set remote_output [run_remote_cmd $rargs]
		if {$print_getout} {
			append_text "\t$remote_output"
		}
		append_text "\n"
		return
	}

	if {$do_query_all} {
		set all [all_query_vars]
		set qargs [list "-Q" $all]
	}

	set rqargs [concat $rargs $qargs]

	set query [run_remote_cmd $rqargs]
	set query_output $query

	set query_result_list ""

	if {$newnew != ""} {
		set new $newnew
	}

	if {![see_if_ok $query $item "$name:$new"]} {
		# failed
		if  {[regexp {^a..=} $query]} {
			# but some result came back
			# synchronize everything with a 2nd call.
			set query_output [query_all 1]
		} else {
			# server may be dead
			if {$item != "ping" && $item != "attach"} {
				try_connect
			}
		}
	} else {
		# succeeded
		# synchronize this variable (or variables)
		# for a speedup used the list parsed by see_if_ok.
		update_menu_vars "USE_LIST"

		if {$do_query_all} {
			global all_settings
			set all_settings $query
		}
	}
}

proc set_kmb_str {} {
	global vl_bk vl_bm vl_bb vr_bk vr_bm vr_bb 

	set str ""
	if {$vl_bk} {
		append str "K"
	}
	if {$vl_bm} {
		append str "M"
	}
	if {$vl_bb} {
		append str "B"
	}
	if {$vr_bk || $vr_bm || $vr_bb} {
		append str ","
	}
	if {$vr_bk} {
		append str "K"
	}
	if {$vr_bm} {
		append str "M"
	}
	if {$vr_bb} {
		append str "B"
	}
	entry_insert $str
}

proc insert_input_window {} {
	global text_area cleanup_window
	global ffont menu_var
	global vl_bk vl_bm vl_bb vr_bk vr_bm vr_bb 

	append_text "\nUse these checkboxes to set the input permissions, "
	append_text "or type in the \"KMB...\"\n"
	append_text "-input string manually.  Then press \"OK\" or \"Skip\".\n"
	append_text "(note: an empty setting means use the default behavior, "
	append_text "see viewonly)\n\n"
	set w "$text_area.wk_f"
	catch {destroy $w}
	frame $w -bd 1 -relief ridge -cursor {top_left_arrow}
	set fl $w.fl
	frame $fl
	set fr $w.fr
	frame $fr
	label $fl.l -font $ffont -text "Normal clients:   "
	checkbutton $fl.bk -pady 1 -font $ffont -anchor w -variable vl_bk \
		-pady 1 -command set_kmb_str -text "Keystrokes" 
	checkbutton $fl.bm -font $ffont -anchor w -variable vl_bm \
		-pady 1 -command set_kmb_str -text "Mouse Motion" 
	checkbutton $fl.bb -font $ffont -anchor w -variable vl_bb \
		-pady 1 -command set_kmb_str -text "Button Clicks"
	label $fr.l -pady 1 -font $ffont -text "View-Only clients:"
	checkbutton $fr.bk -font $ffont -anchor w -variable vr_bk \
		-pady 1 -command set_kmb_str -text "Keystrokes" 
	checkbutton $fr.bm -font $ffont -anchor w -variable vr_bm \
		-pady 1 -command set_kmb_str -text "Mouse Motion" 
	checkbutton $fr.bb -font $ffont -anchor w -variable vr_bb \
		-pady 1 -command set_kmb_str -text "Button Clicks"

	if {[info exists menu_var(input)]} {
		set input_str $menu_var(input)
	} else {
		set input_str ""
	}

	if {[regexp {(.*),(.*)} $input_str match normal viewonly]} {
		;
	} else {
		set normal $input_str
		set viewonly ""
	}
	set vl_bk 0
	set vl_bm 0
	set vl_bb 0
	set vr_bk 0
	set vr_bm 0
	set vr_bb 0

	if {[regexp -nocase {K} $normal]} {
		set vl_bk 1
	}
	if {[regexp -nocase {M} $normal]} {
		set vl_bm 1
	}
	if {[regexp -nocase {B} $normal]} {
		set vl_bb 1
	}
	if {[regexp -nocase {K} $viewonly]} {
		set vr_bk 1
	}
	if {[regexp -nocase {M} $viewonly]} {
		set vr_bm 1
	}
	if {[regexp -nocase {B} $viewonly]} {
		set vr_bb 1
	}

	pack $fl.l $fl.bk $fl.bm $fl.bb -side top -fill x
	pack $fr.l $fr.bk $fr.bm $fr.bb -side top -fill x
	pack $fl $fr -side left
	update
	update idletasks
	$text_area window create end -window $w
	$text_area see end
	$text_area insert end "\n"
#	$text_area insert end "\n\n\n\n\n\n\n\n\n"

	set cleanup_window $w
}

proc set_ca_str {w} {
	global ca_bk ca_bm ca_bb ca_bk ca_di

	if {$ca_di} {
		entry_insert "disconnect"
		$w.bk configure -state disabled
		$w.bm configure -state disabled
		$w.bb configure -state disabled
		return
	}

	$w.bk configure -state normal
	$w.bm configure -state normal
	$w.bb configure -state normal

	set str ""
	if {$ca_bk} {
		append str "K"
	}
	if {$ca_bm} {
		append str "M"
	}
	if {$ca_bb} {
		append str "B"
	}
	entry_insert $str
}

proc insert_client_action_window {input} {
	global text_area cleanup_window
	global ffont menu_var
	global ca_bk ca_bm ca_bb ca_bk ca_di

	append_text "\nUse these checkboxes to set the input permissions "
	append_text "for this client\n-or- whether to disconnect it instead.  "
	append_text "Then press \"OK\" or \"Skip\".\n\n"
	set w "$text_area.ca_f"
	catch {destroy $w}
	frame $w -bd 1 -relief ridge -cursor {top_left_arrow}
	checkbutton $w.di -pady 1 -font $ffont -anchor w -variable ca_di \
		-pady 1 -command "set_ca_str $w" -text "Disconnect    " 
	checkbutton $w.bk -font $ffont -anchor w -variable ca_bk \
		-pady 1 -command "set_ca_str $w" -text "Keystrokes" 
	checkbutton $w.bm -font $ffont -anchor w -variable ca_bm \
		-pady 1 -command "set_ca_str $w" -text "Mouse Motion" 
	checkbutton $w.bb -font $ffont -anchor w -variable ca_bb \
		-pady 1 -command "set_ca_str $w" -text "Button Clicks"

	set ca_di 0
	set ca_bk 0
	set ca_bm 0
	set ca_bb 0

	if {[regexp -nocase {K} $input]} {
		set ca_bk 1
	}
	if {[regexp -nocase {M} $input]} {
		set ca_bm 1
	}
	if {[regexp -nocase {B} $input]} {
		set ca_bb 1
	}

	pack $w.di $w.bk $w.bm $w.bb -side left
	update
	update idletasks
	$text_area window create end -window $w
	$text_area see end
	$text_area insert end "\n"

	set cleanup_window $w
}

proc cleanup_text_window {} {
	global cleanup_window
	if {[info exists cleanup_window]} {
		catch {destroy $cleanup_window}
	}
}

# For updating a string variable.   Also used for simple OK/Skip dialogs
# with entry = 0.
proc entry_dialog {item {entry 1}} {
	global menu_var entry_str entry_set entry_dialog_item
	global unset_str connected_to_x11vnc

	set entry_str "Set $item"
	set entry_set 0
	set entry_dialog_item $item

	entry_enable
	menus_disable

	if {$entry} {
		entry_insert ""
		if {[info exists menu_var($item)] &&
		    $menu_var($item) != $unset_str} {
			entry_insert $menu_var($item)
			entry_select
		}

		if {[is_browse $item]} {
			entry_browse_button
		}
		set_info "Set parameter in entry box, "
		entry_focus
	} else {
		entry_disable box
	}

	set clean_text_window 0;

	if {$item == "input"} {
		insert_input_window
		set clean_text_window 1
	}

	update

	# wait for user reply:
	vwait entry_set

	set rc $entry_set
	set entry_set 0

	set value [entry_get]
	update

	entry_browse_button 0
	set entry_str "Set... :"

	entry_delete
	entry_disable
	menus_enable

	if {$clean_text_window} {
		cleanup_text_window;
	}

	update

	if {! $entry} {
		;
	} elseif {$rc} {
		set menu_var($item) $value
	} else {
		if {[in_debug_mode]} {
			append_text "skipped setting $item\n"
		}
	}
	return $rc
}

proc warning_dialog {msg {item "gui"} } {
	append_text $msg
	# just reuse the entry widgets for a yes/no dialog
	return [entry_dialog $item 0]
}

# For updating a boolean toggle:
proc check_var {item} {
	global menu_var

	set inval $menu_var($item);

	if {$item == "debug_gui"} {
		return "";
	}

	set rname $item
	if {! $inval} {
		if {[regexp {^no} $item]} {
			regsub {^no} $rname "" rname
		} else {
			set rname "no$rname"
		}
	}
	return $rname
}

proc see_if_ok {query item expected} {
	global query_result_list

	set ok 0
	set found ""

	set query_result_list [split_query $query]

	foreach q $query_result_list {
		# XXX following will crash if $item is not a good regexp
		# need to protect it \Q$item\E style...
#		if {[regexp "^$item:" $q]} {
#			set found $q
#		}
		if {[string first "$item:" $q] == 0} {
			set found $q
		}
		if {$q == $expected} {
			set ok 1
			if {$found != ""} {
				break;
			}
		}
	}
	if {$found == ""} {
		set msg $query
		regsub {^a..=} $msg {} msg
		if {[string length $msg] > 60} {
			set msg [string range $msg 0 60]
		}
	} else {
		set msg $found
	}
	if {!$ok && $found != ""} {
		# check for floating point match:
		set v1 ""
		set v2 ""
		regexp {:([0-9.][0-9.]*)$} $found m0 v1
		regexp {:([0-9.][0-9.]*)$} $expected m0 v2
		if {$v1 != "" && $v2 != ""} {
			set diff ""
			catch {set diff [expr "$v1 - $v2"]}
			if {$diff != ""} {
				if {$diff < 0} {
					set diff [expr "0.0 - $diff"]
				}
				if {$diff < 0.00001} {
					set ok 1
				}
			}
		}
	}
	if {$ok} {
		append_text "\tSet OK  ($msg)\n"
		return 1

	} elseif {[opt_match P $item] && [regexp {:(-|\+)} $expected]} {
		# e.g. blackout:+30x30+20+20
		append_text "\t($msg)\n"
		return 1
	} elseif {[regexp {:[0-9]\.[0-9]} $expected]} {
		append_text "\t($msg)\n"
		return 1
	} elseif {$item == "connect" || $item == "disconnect"
	    || $item == "client" || $item == "client_input"} {
		append_text "\t($msg)\n"
		return 1
	} else {
		append_text "\t*FAILED* $msg\n"
		return 0
	}
}

proc update_menu_vars {{query ""}} {
	global all_settings menu_var query_result_list

	set debug [in_debug_mode]

	if {$query == "USE_LIST"} {
		;
	} elseif {$query == ""} {
		set query_result_list [split_query $all_settings]
	} else {
		set query_result_list [split_query $query]
	}

	foreach piece $query_result_list {
		if {[regexp {^([^:][^:]*):(.*)$} $piece m0 item val]} {
			if {[info exists menu_var($item)]} {
				set old $menu_var($item)
				if {$val == "N/A"} {
					continue
				}
				set menu_var($item) $val
			}
			if {$item == "clients"} {
				update_clients_menu $val
			} elseif {$item == "display"} {
				set_x11_display $val
			} elseif {$item == "vncdisplay"} {
				set_vnc_display $val
			} elseif {$item == "http_url"} {
				set_vnc_url $val
			}
		}
	}
}

proc clear_all {} {
	global menu_var unset_str

	set debug [in_debug_mode]
	
	foreach item [array names menu_var] {
		if {$item == "debug_gui"} {
			continue
		}
		if {[info exists menu_var($item)]} {
			if {[is_action $item]} {
				set menu_var($item) ""
			} elseif {[value_is_bool $item]} {
				set menu_var($item) 0
			} elseif {[value_is_string $item]} {
				set menu_var($item) $unset_str
			}
		}
	}
	append_text "Cleared all settings.\n"
}

proc all_query_vars {} {
	global query_ans_list query_aro_list all_settings
	global cache_all_query_vars
	
	if {$cache_all_query_vars != ""} {
		return $cache_all_query_vars
	}

	set qry ""
	foreach item $query_ans_list {
		if {$qry == ""} {
			set qry $item
		} else {
			append qry ",$item"
		}
	}
	foreach item $query_aro_list {
		if {$qry == ""} {
			set qry $item
		} else {
			append qry ",$item"
		}
	}
	set cache_all_query_vars $qry

	return $qry
}

proc query_all {{quiet 0}} {
	global query_ans_list query_aro_list all_settings

	set qry [all_query_vars]

	set qargs [list "-Q" $qry]
	set all [run_remote_cmd $qargs]

	if {[regexp {ans=} $all]} {
		if {! $quiet} {
			append_text "Retrieved all settings.\n"
		}
		set all_settings $all
		update_menu_vars $all
	} else {
		if {! $quiet} {
			append_text "Failed to retrieve settings.\n"
		}
	}
	return $all
}

proc set_info {str} {
	global info_str info_label
#set w1 [$info_label cget -width]
#set w2 [winfo width $info_label]
#puts "set_info: w=$w1  winfo=$w2"
#append_text "$str\n"
	set info_str "$str"
	update
}

proc append_text {str} {
	global text_area
	$text_area insert end $str
	$text_area see end
}

proc show_all_settings {} {
	global all_settings
	set txt "\nRead-Write setting:\n\n"
	foreach item [split_query $all_settings]  {
		regsub {:} $item {: } item
		append txt "  $item\n"
		if {[regexp {noremote} $item]} {
			append txt "\nRead-Only setting:\n\n"
		}
	}
	textwin "Settings" "All Current Settings" $txt
}

proc show_logfile {} {
	global menu_var unset_str
	set logfile $menu_var(logfile)
	
	if {$logfile == "" || $logfile == $unset_str} {
		set txt "\nNo logfile has been specified.\n\n"	
	} elseif {![file exists $logfile]} {
		set txt "\nLogfile \"$logfile\" does not exist.\n\n"
	} else {
		set fh "-3"
		set err ""
		catch {set fh [open $logfile "r"]} err
		if {$fh == "-3"} {
			set txt "\nError opening \"$logfile\" $err.\n\n"
		} else {
			set txt "\nLogfile \"$logfile\" current contents:\n"
			while {[gets $fh line] > -1} {
				append txt "$line\n"
			}
			close $fh
		}
	}
	textwin "Logfile" "Logfile" $txt
}

proc tail_logfile {} {
	global menu_var unset_str ffont
	set logfile $menu_var(logfile)
	
	set txt ""
	if {$logfile == "" || $logfile == $unset_str} {
		set txt "\nNo logfile has been specified.\n\n"	
	} elseif {![file exists $logfile]} {
		set txt "\nLogfile \"$logfile\" does not exist.\n\n"
	} else {
		set cmd ""
		set xterm_cmd "xterm -sb -fn $ffont -geometry 80x45 -title x11vnc-logfile -e"
		set cmd [split $xterm_cmd]
		lappend cmd "tail"
		lappend cmd "-3000f"
		lappend cmd $logfile
		lappend cmd "&"
		catch {[eval exec $cmd]}
	}
	if {$txt != ""} {
		textwin "Logfile" "Logfile" $txt
	}
}

proc set_connected {yesno} {
	global connected_to_x11vnc
	set orig $connected_to_x11vnc
	
	if {$yesno == "yes"} {
		set connected_to_x11vnc 1
	} else {
		set connected_to_x11vnc 0
		no_x11_display
		no_vnc_display
	}
	if {$orig != $connected_to_x11vnc} {
		set_widgets
	}
}

proc detach_from_display {} {
	global connected_to_x11vnc reply_xdisplay x11vnc_xdisplay
	set str "Detaching from X display."
	if {$reply_xdisplay != ""} {
		set str "Detaching from $reply_xdisplay."
	} elseif {$x11vnc_xdisplay != ""} {
		set str "Detaching from $x11vnc_xdisplay."
	}
	if {$connected_to_x11vnc} {
		append_text "$str\n"
	}
	set_connected no
}

# Menu item is an action:
proc do_action {item} {
	global menu_var connected_to_x11vnc beginner_mode

	if {[in_debug_mode]} {
		append_text "action: \"$item\"\n"
	}

	if {$item == "ping"} {
		if {$beginner_mode} {
			try_connect_and_query_all
		} else {
			try_connect
		}
		return
	} elseif {$item == "start"} {
		start_x11vnc
		return
	} elseif {$item == "detach"} {
		detach_from_display
		return
	} elseif {$item == "attach"} {
		try_connect_and_query_all
		return
	} elseif {$item == "update-all"} {
		query_all
		return
	} elseif {$item == "clear-all"} {
		clear_all
		return
	} elseif {$item == "show-start-cmd"} {
		show_start_cmd
		return
	} elseif {$item == "all-settings"} {
		show_all_settings
		return
	} elseif {$item == "show-logfile"} {
		show_logfile
		return
	} elseif {$item == "tail-logfile"} {
		tail_logfile
		return
	} elseif {$item == "stop+quit"} {
		push_new_value "stop" "stop" 1 0
		set_connected no
		update
		after 500
		destroy .
	}

	if {[value_is_string $item]} {
		if {! [entry_dialog $item]} {
			return
		}
		set new $menu_var($item)
		set name $item
	} else {
		set new 1
		set name $item
	}

	if {! $connected_to_x11vnc} {
		;
	} elseif {[regexp {^(stop|quit|exit|shutdown)$} $item]} {
		# just do -R
		append_text "stopping remote x11vnc server...\n"
		push_new_value $item $name $new 0
		set_connected no
		
	} elseif {[opt_match Q $item]} {
		push_new_value $item $name $new 1
	} else {
		push_new_value $item $name $new 0
	}
}

proc ptime {time} {
	set usec [lindex [split $time] 0]
	set sec [format "%.3f" [expr "$usec / 1000000.0"]]
	puts "time: $sec secs."
}

proc do_var {item} {
	global connected_to_x11vnc item_cascade menu_var

	set debug [in_debug_mode]

	set string 0
	if {[is_action $item]} {
		# Menu item is action:
		if {$debug} {
			ptime [time {do_action $item}]
		} else {
			do_action $item
		}
		return
	}

	if {[value_is_string $item]} {
		# Menu item is a string:
		if {$item_cascade($item) != ""} {
			# Cascade sets variable automatically
		} else {
			# Otherwise Entry box
			if {![entry_dialog $item]} {
				return
			}
		}
		set new $menu_var($item)
		set name $item
	} else {
		# Menu item is a boolean:
		set name [check_var $item]
		if {$name == ""} {
			return
		}
		set new 1
	}
	if {$connected_to_x11vnc} {
		if {$debug} {
			ptime [time {push_new_value $item $name $new 1}]
		} else {
			push_new_value $item $name $new 1
		}

		if {$item == "http"} {
			global vnc_url
			append_text "  URL: $vnc_url\n"
		}
	}
}

proc menu_help {item} {
	if ![help_win $item] {
		textwin "nohelp" "No help available" \
			"Sorry, no help avaiable for \"$item\""
	}
}

proc opt_match {c item} {
	global item_opts
	if {[info exists item_opts($item)]} {
		if {[regexp "^\[A-z\]*$c" $item_opts($item)]} {
			return 1
		}
	}
	return 0
}

proc is_action {item} {
	return [opt_match A $item]
}

proc is_gui_internal {item} {
	return [opt_match G $item]
}

proc is_browse {item} {
	return [opt_match F $item]
}

proc value_is_string {item} {
	global item_bool
	if {! $item_bool($item)} {
		return 1
	} else {
		return 0
	}
}

proc value_is_bool {item} {
	global item_bool
	if {$item_bool($item)} {
		return 1
	} else {
		return 0
	}
}

proc split_query0 {query} {
	# original slower way with regexp/regsub
	regsub -all {aro=} $query {ans=} query
	set items {}
	while {1} {
		if {! [regexp {^ans=(.*)$} $query m0 m1]} {
			break
		}
		set item $m1
		set m2 ""
		regexp {,ans=.*$} $item m2
		regsub {,ans=.*$} $item "" item
		if {$item != ""} {
			lappend items $item
		}
		set query $m2
		regsub {^,} $query "" query
	}
	return $items
}

proc split_query {query} {
	regsub -all {aro=} $query {ans=} query
	set items {}
	while {1} {
		set n [string first "ans=" $query]
		if {$n < 0} {
			break
		}
		set from [expr $n+4]

		set m [string first ",ans=" $query]
		if {$m < 0} {
			set more 0
			set item [string range $query $from end]
		} else {
			set more 1
			set to   [expr $m-1]
			set item [string range $query $from $to]
		}
		if {$item != ""} {
			lappend items $item
		}
		if {$more} {
			incr m
			set query [string range $query $m end]
		} else {
			set query ""
		}
	}
	return $items
}

proc set_x11_display {name} {
	global x11_display
	set x11_display "x11vnc X display: $name"
	set_name "tkx11vnc - $name"
}
proc set_vnc_display {name} {
	global vnc_display
	set vnc_display "VNC display: $name"
}
proc set_vnc_url {name} {
	global vnc_url
	set vnc_url $name
}
proc no_x11_display {} {
	set_x11_display "(*none*)"
	set_name "tkx11vnc"
}
proc no_vnc_display {} {
	set_vnc_display "(*none*)"
}
proc no_vnc_url {} {
	set_vnc_url "(*none*)"
}

proc fetch_displays {} {

	set qargs [list "-Q" "display,vncdisplay"]
	set result [run_remote_cmd $qargs]

	set got_x11 0
	set got_vnc 0
	set got_url 0

	foreach item [split_query $result] {
		if {[regexp {^display:(.*)$} $item m0 m1]} {
			set_x11_display $m1
			set got_x11 1
		} elseif {[regexp {^vncdisplay:(.*)$} $item m0 m1]} {
			set_vnc_display $m1
			set got_vnc 1
		} elseif {[regexp {^http_url:(.*)$} $item m0 m1]} {
			set_vnc_url $m1
			set got_url 1
		}
	}
	if {! $got_x11} {
		no_x11_display
	}
	if {! $got_vnc} {
		no_vnc_display
	}
	if {! $got_url} {
		no_vnc_url
	}
}

proc client_dialog {client} {
	set cid ""
	set host ""
	set ip ""
	global menu_var text_area cleanup_window item_bool

	append_text "\nClient info string:  $client\n\n"
	if {[regexp {^(.*):(.*):(.*):(.*):(.*):(.*):(.*)$} \
	    $client m0 m1 m2 m3 m4 m5 m6 m7]} {
		# id:ip:port:user:hostname:input:loginvo
		set cid $m1
		set ip $m2
		set port $m3
		set user $m4
		set host $m5
		regsub {\..*$} $host "" host
		set input $m6
		set logvo $m7
		append_text "Host: $host, Port: $port, User: $user, IP: $ip, Id: $cid\n"
		append_text "    - originally logged in as:  "
		if {$logvo == "1" } {
			append_text "View-Only Client\n"
		} else {
			append_text "Normal Client\n"
		}
		append_text "    - currently allowed input:  "
		set sk 0
		set sm 0
		set sb 0
		if {[regexp -nocase {K} $input]} {
			append_text "Keystrokes"
			set sk 1
		}
		if {[regexp -nocase {M} $input]} {
			if {$sk} {
				append_text ", "
			}
			append_text "Mouse-Motion"
			set sm 1
		}
		if {[regexp -nocase {B} $input]} {
			if {$sk || $sm} {
				append_text ", "
			}
			append_text "Button-Clicks"
			set sb 1
		}
		if {! $sk && ! $sm && ! $sb} {
			append_text "None"
		}
		append_text "\n"
	}
	if {$cid == ""} {
		append_text "Invalid client info string: $client\n"
		return
	}

	regsub -all {_} $input "" input
	set menu_var(client) "$input"
	set item_bool(client) 0

	insert_client_action_window $input
	set rc [entry_dialog client 1]

	cleanup_text_window

	set val $menu_var(client)
	#puts "rc: $rc  val: $val"

	if {! $rc} {
		return;
	} elseif {[regexp -nocase {(disconnect|close)} $val]} {
		disconnect_dialog $client
	} else {
		regsub -all -nocase {[^KMB]} $val "" val
		set item_bool(client_input) 0
		push_new_value "client_input" "client_input" "$cid:$val" 0
	}
}

proc disconnect_dialog {client} {
	set cid ""
	set host ""
	set msg "\n"
	append msg "*** Client info string: $client\n"
	if {[regexp {^(.*):(.*):(.*):(.*):(.*):(.*)$} $client m0 m1 m2 m3 m4 m5 m6]} {
		set cid $m1
		set ip $m2
		set port $m3
		set host $m4
		regsub {\..*$} $host "" host
		set input $m5
		set logvo $m6
		append_text "Host: $host, Port: $port, IP: $ip, Id: $cid\n"
	}
	if {$cid == ""} {
		append_text "Invalid client info string: $client\n"
		return
	}
	append msg "*** To *DISCONNECT* this client press \"OK\", otherwise press \"Skip\"\n"
	bell
	if {[warning_dialog $msg "current"]} {
		push_new_value "disconnect" "disconnect" $cid 1
	} else {
		append_text "disconnect cancelled.\n"
	}
}

proc update_clients_and_repost {} {
	global item_cascade menu_m menu_b

	append_text "Refreshing connected clients list... "
	query_all 1
	update

	set saw 0
	set casc $item_cascade(current)
	set last [$casc index end]
	for {set i 0} {$i <= $last} {incr i} {
		if {[$casc type $i] == "separator"} {
			continue
		}
		set name [$casc entrycget $i -label]
		if {[regexp {^num-clients} $name]} {
			continue
		}
		if {[regexp {^refresh-list} $name]} {
			continue
		}
		if {! $saw} {
			append_text "\n"
		}
		set saw 1
		append_text "client: $name\n"
	}
	if {! $saw} {
		append_text "done.\n"
	}
}

proc update_clients_menu {list} {
	global item_cascade ffont
	set subm $item_cascade(current);
	catch {destroy $subm}
	menu $subm -tearoff 0 -font $ffont
	$subm add command
	$subm add command -label "refresh-list" -command "update_clients_and_repost"
	$subm add separator
	set count 0
	foreach client [split $list ","] {
		if {[regexp {^(.*):(.*):(.*):(.*):(.*):(.*):(.*)$} \
		    $client m0 m1 m2 m3 m4 m5 m6 m7]} {
			# id:ip:port:user:hostname:input:loginvo
			set host $m5
			regsub {\..*$} $host "" host
			set clabel "$host $m1"
		} else {
			regsub {:.*$} $client "" clabel
		}
		$subm add command -label "$clabel" \
			-command "client_dialog $client"
		incr count
	}
	$subm entryconfigure 0 -label "num-clients: $count"
}

proc set_widgets {} {
	global connected_to_x11vnc item_case item_entry menu_m

	foreach item [array names item_case] {
		set case $item_case($item)
		set menu $menu_m($case)
		set entry $item_entry($item)
		if {$entry < 0} {
			# skip case under beginner_mode 
			continue
		}
		set type [$menu type $entry]
		if {$type == "separator" || $type == "tearoff"} {
			continue
		}
		if {$connected_to_x11vnc} {
			if {[active_when_connected $item]} {
				$menu entryconfigure $entry -state normal
#puts "n-1 $case / $item / $entry"
			} else {
				$menu entryconfigure $entry -state disabled
#puts "I-1 $case / $item / $entry"
			}
		} else {
			if {[active_when_starting $item]} {
				$menu entryconfigure $entry -state normal
#puts "n-2 $case / $item / $entry"
			} else {
				$menu entryconfigure $entry -state disabled
#puts "I-2 $case / $item / $entry"
			}
		}
	}
}

proc toggle_simple_gui {} {
	global beginner_mode simple_gui_created
	global connected_to_x11vnc

	if {$beginner_mode} {
		append_text "\nSwitching to simple-gui mode.\n"
	} else {
		append_text "\nSwitching to power-user gui mode.\n"
	}

	set simple_gui_created 1
	make_menu_items
	set_widgets
	set_internal_help
	if {$connected_to_x11vnc} {
		query_all
	}
	append_text "\n"
}

proc make_menu_items {} {
	global template 
	global menu_b menu_m menu_count
	global item_opts item_bool item_case item_entry menu_var unset_str
	global item_cascade
	global bfont ffont beginner_mode simple_gui_created
	global helptext helpremote helplabel

	# Extract the menu items:
	set case "";
	foreach line [split $template "\n"] {
		if {[regexp {^Row:} $line]} {
			continue
		}
		if {[regexp {^[A-z]} $line]} {
			set case [string trim $line]

			if {$simple_gui_created} {
				set i0 0
				if {$case == "Misc"} {
					# kludge for simple_gui
					set i0 1
				}
				catch {$menu_m($case) delete $i0 end}
			}
			set menu_count($case) 0
			continue;
		}

		set item [string trim $line]
		regsub -all {  *} $item " " item
		if {$item == ""} {
			continue;
		}
		set opts ""
		if {[regexp {^=} $item]} {
			set opts [lindex [split $item] 0]
			regsub {^=} $opts "" opts
			set item [lindex [split $item] 1]
		}
		if {[regexp {^0} $opts]} {
			continue;
		}
		if {[regexp {:$} $item]} {
			set bool 0
		} else {
			set bool 1
		}
		regsub {:$} $item {} item

		if {$item == "-- D"} {
			set beginner_sep 1
			set item "--"
		} else {
			set beginner_sep 0
		}

		set item_opts($item) $opts
		set item_case($item) $case
		set item_bool($item) $bool
		set item_cascade($item) ""
		set item_entry($item) $menu_count($case)

		set mvar 0 
		set m $menu_m($case)

		if {$beginner_mode && ! $beginner_sep && ![opt_match D $item]} {
			set item_entry($item) "-1"
			continue;
		}

		if {0} { puts "ITEM: $item\t- $opts\t- $case\t- $bool\t- $menu_count($case)" }

		# Create the menu items, its variables, etc., etc.

		if {$item == "--"} {
			$m add separator

		} elseif {$item == "Quit"} {
			# Quit item must shut us down:
			$m add command -label "$item" -underline 0 \
				-font $ffont \
				-command {destroy .; exit 0}

		} elseif {$case == "Help"} {
			# Help is simple help:
			$m add command -label "$item" \
				-font $ffont \
				-command "menu_help $item"

		} elseif {$item == "current"} {
			# Current clients cascade
			set subm $m.current_cascade
			catch {destroy $subm}
			set item_cascade($item) $subm
			update_clients_menu ""
			$m add cascade -label "$item" \
				-font $ffont \
				-menu $subm

		} elseif {[is_action $item]} {
			# Action
			$m add command -label "$item" \
				-font $ffont \
				-command "do_var $item"
			set menu_var($item) "";	# for convenience

		} elseif {! $item_bool($item)} {
			# String
			if {[regexp -- {-C:(.*)} $item_opts($item) m0 m1]} {
				# Radiobutton select
				set subm $m.radio_cascade$menu_count($case)
				catch {destroy $subm}
				menu $subm -tearoff 0 -font $ffont
				foreach val [split $m1 ","] {
					$subm add radiobutton -label "$val" \
						-command "do_var $item" \
						-value "$val" \
						-font $ffont \
						-variable menu_var($item)
				}
				$m add cascade -label "$item" \
					-font $ffont \
					-menu $subm
				set item_cascade($item) $subm
			} else {
				# Arbitrary_string
				$m add command -label "$item" \
					-font $ffont \
					-command "do_var $item"
			}
			set mvar 1

		} elseif {$item == "simple-gui"} {
			if {! $simple_gui_created} {
				$m add checkbutton -label "$item" \
					-command "toggle_simple_gui" \
					-font $ffont \
					-variable beginner_mode
			}
		} else {
			# Boolean
			$m add checkbutton -label "$item" \
				-command "do_var $item" \
				-font $ffont \
				-variable menu_var($item)
			set menu_var($item) 0
		}

		incr menu_count($case)

		if {$mvar} {
			set menu_var($item) $unset_str
		}
	}

	# Now make the little "(?)" help buttons
	foreach case [array names menu_m] {
		if {$case == "Help"} {
			continue;
		}
		set m $menu_m($case);
		set n [$m index end]

		for {set i 0} {$i <= $n} {incr i} {
			set type [$m type $i]
			if {$type == "separator"} {
				$m add separator
			} elseif {$type == "tearoff"} {
				continue;
			} else {
				set label [$m entrycget $i -label]
				set str ""
				if {[info exists helpremote($label)]} {
					set str "(?)"
				} elseif {[info exists helptext($label)]} {
					set str "(?)"
				}
				$m add command -label $str \
					-font $ffont \
					-command "menu_help $label";

				if {$str == ""} {
					$m entryconfigure end -state disabled
				}
				set arg "$m,$i"
				set helplabel($arg) $label
				set j [$m index end]
				set arg "$m,$j"
				set helplabel($arg) $label
			}
			if {$i == 0} {
				$m entryconfigure end -columnbreak 1
			}
		}
	}
}

proc make_widgets {} {
	global template 
	global menu_b menu_m menu_count
	global item_opts item_bool item_case item_entry menu_var unset_str
	global item_cascade
	global info_label info_str x11_display vnc_display
	global text_area
	global entry_box entry_str entry_set entry_label entry_ok entry_browse
	global entry_help entry_skip
	global bfont ffont beginner_mode
	global helptext helpremote helplabel

	# Make the top label
	set label_width 80
	set info_label .info
	label $info_label -textvariable info_str -bd 2 -relief groove \
		-anchor w -width $label_width -font $ffont
	pack $info_label -side top -fill x -expand 0

	# Extract the Rows:
	set row 0;
	set colmax 0;
	foreach line [split $template "\n"] {
		if {[regexp {^Row: (.*)} $line rest]} {
			set col 0
			foreach case [split $rest] {
				if {$case == "" || $case == "Row:"} {
					continue
				}
				set menu_row($case) $row
				set menu_col($case) $col

				lappend cases($col) $case;
				set len [string length $case]
				if {[info exists max_len($col)]} {
					if {$len > $max_len($col)} {
						set max_len($col) $len
					}
				} else {
					set max_len($col) $len
				}
				incr col
				if {$col > $colmax} {
					set colmax $col
				}
			}
			incr row;
		}
	}

	# Make frames for the rows and make the menu buttons.
	set f ".menuframe"
	frame $f
	for {set c 0} {$c < $colmax} {incr c} {
		set colf "$f.menuframe$c"
		frame $colf
		pack $colf -side left -fill y
		set fbg [$colf cget -background]
		foreach case $cases($c) {
			set menub "$colf.menu$case";
			set menu "$colf.menu$case.menu";
			set menu_b($case) $menub
			set menu_m($case) $menu
			set ul 0
			foreach char [split $case ""] {
				set char [string tolower $char]
				if {![info exists underlined($char)]} {
					set underlined($char) 1
					break
				}
				incr ul
			}
			menubutton $menub -text "$case" -underline $ul \
				-anchor w -menu $menu -background $fbg \
				-font $bfont
			pack $menub -side top -fill x
			menu $menu -tearoff 0
		}
	}
	pack $f -side top -fill x

	make_menu_items

	# Make the x11 and vnc display label bar:
	set df .displayframe
	frame $df -bd 1 -relief groove

	set df_x11 "$df.xdisplay"
	no_x11_display

	set lw [expr {$label_width / 2}]
	label $df_x11 -textvariable x11_display -width $lw -anchor w \
		-font $ffont

	set df_vnc "$df.vdisplay"
	no_vnc_display
	label $df_vnc -textvariable vnc_display -width $lw -anchor w \
		-font $ffont

	pack $df_x11 $df_vnc -side left 
	pack $df -side top -fill x

	# text area
	text .text -height 12 -relief ridge -font $ffont
	set text_area .text
	pack .text -side top -fill both -expand 1


	set str "Click Help -> gui for overview."
	append_text "\n$str\n\n"

	# Make entry box stuff
	set ef .entryframe
	frame $ef -bd 1 -relief groove

	# Entry Label
	set ef_label "$ef.label"
	label $ef_label -textvariable entry_str -anchor w -font $bfont

	set entry_str "Set... : "
	set ef_entry "$ef.entry"
	entry $ef_entry -relief sunken -font $ffont
	bind $ef_entry <KeyPress-Return> {set entry_set 1}
	bind $ef_entry <KeyPress-Escape> {set entry_set 0}

	# Entry OK button
	set bpx "1m"
	set bpy "1"
	set hlt "0"
	set ef_ok "$ef.ok"
	button $ef_ok -text OK -pady $bpy -padx $bpx -command {set entry_set 1} \
		-highlightthickness $hlt \
		-font $bfont

	# Entry Skip button
	set ef_skip "$ef.skip"
	button $ef_skip -text Skip -pady $bpy -padx $bpx -command {set entry_set 0} \
		-highlightthickness $hlt \
		-font $bfont

	# Entry Help button
	set ef_help "$ef.help"
	button $ef_help -text Help -pady $bpy -padx $bpx -command \
		{menu_help $entry_dialog_item} -font $bfont \
		-highlightthickness $hlt

	# Entry Browse button
	set ef_browse "$ef.browse"
	button $ef_browse -text "Browse..." -pady $bpy -padx $bpx -font $bfont \
		-highlightthickness $hlt \
		-command {entry_insert [tk_getOpenFile]} 

	pack $ef_label -side left
	pack $ef_entry -side left -fill x -expand 1
	pack $ef_ok   -side right
	pack $ef_skip -side right
	pack $ef_help -side right
	pack $ef -side bottom -fill x

	set entry_ok $ef_ok
	set entry_skip $ef_skip
	set entry_help $ef_help
	set entry_box $ef_entry
	set entry_browse $ef_browse
	set entry_label $ef_label
	entry_disable

	update
	wm minsize . [winfo width .] [winfo height .]

	#set w [winfo width .info]
	#puts "w1: $w"
	#set w [winfo reqwidth .info]
	#puts "w2: $w"
}

proc menu_bindings {} {
	bind Menu <<MenuSelect>> {
#syntax hilite bug \
MenuSelect>>
		set n [%W index active]
		set label "    "
		if {$n != "none"} {
			set str %W,$n
			set which ""
			if {[info exists helplabel($str)]} {
				set vname [format %%-16s $helplabel($str)]
				set label "Click (?) for help on: $vname"
				set which $helplabel($str)
			}
			if {$which == ""} {
				;
			} elseif {[is_action $which]} {
				if {[info exists menu_var($which)] 
				    && $menu_var($which) != ""} {
					set label "$label value: $menu_var($which)"
				} else {
					set label "$label (is action)"
				}
			} elseif {[info exists menu_var($which)]} {
				set label "$label value: $menu_var($which)"
				if {$which == "http"} {
					global vnc_url
					set label "$label  URL: $vnc_url"
				}
			}
		}
		set_info $label
	}
}

proc key_bindings {} {
	global env menus_disabled
	if {[info exists env(USER)] && $env(USER) == "runge"} {
		# quick restart
		bind . <Control-KeyPress-c> {exec $argv0 $argv &; destroy .}
	}
	bind . <Control-KeyPress-p> { \
		global menus_disabled; \
		if {!$menus_disabled} {try_connect_and_query_all} \
	}
	bind . <Control-KeyPress-u> { \
		global menus_disabled; \
		if {!$menus_disabled} {query_all 0} \
	}
	bind . <Control-KeyPress-r> { \
		global menus_disabled; \
		if {!$menus_disabled} {query_all 0} \
	}
	bind . <Control-KeyPress-d> { \
		global menus_disabled; \
		if {!$menus_disabled} {detach_from_display} \
	}
	bind . <Control-KeyPress-a> { \
		global menus_disabled; \
		if {!$menus_disabled} {try_connect_and_query_all} \
	}
}

proc stop_watch {onoff} {
	global orig_cursor text_area entry_box

	set widgets [list . $text_area $entry_box] 

	if {$onoff == "on"} {
		foreach item $widgets {
			$item config -cursor {watch}
		}
	} else {
		foreach item $widgets {
			$item config -cursor {}
		}
	}
	update
}

proc double_check_noremote {} {
	set msg "\n\n"
	append msg "*** WARNING: setting \"noremote\" will disable ALL remote control commands (i.e.\n"
	append msg "*** WARNING: *this* gui will be locked out). Do you really want to do this?\n"
	append msg "*** WARNING: If so, press \"OK\", otherwise press \"Skip\"\n"
	append msg "\n"
	bell
	return [warning_dialog $msg "noremote"]
}

proc double_check_start_x11vnc {} {
	global hostname
	set msg [get_start_x11vnc_txt]
	append msg "\n"
	append msg "*** To run the above command on machine \"$hostname\" to\n"
	append msg "*** start x11vnc press \"OK\" otherwise press \"Skip\".\n"
	return [warning_dialog $msg "start"]
}

proc get_start_x11vnc_txt {} {
	set cmd [get_start_x11vnc_cmd]
	set str [join $cmd]
	set msg ""
	append msg "\n"
	append msg "==== The command built so far is: ====\n";
	append msg "\n"
	append msg "$str\n"
	return $msg
}

proc show_start_cmd {} {
	set msg [get_start_x11vnc_txt]
	append_text "$msg\n"
}

proc get_start_x11vnc_cmd {{show_rc 0}} {
	global menu_var unset_str x11vnc_prog

	set xterm_cmd "xterm -iconic -geometry 80x35 -title x11vnc-console -e"

	set cmd [split $xterm_cmd]

	lappend cmd $x11vnc_prog

	set rc_txt ""

	set saw_id 0

	foreach item [lsort [array names menu_var]] {
		if {![active_when_starting $item]} {
			continue
		}
		if {[is_action $item]} {
			continue
		}
		if {$item == "debug_gui"} {
			continue
		}
		if {$item == "id" || $item == "sid"} {
			set val $menu_var($item);
			if {$val == "0x0" || $val == "root"} {
				continue
			}
		}
		if {$item == "sid" && $saw_id} {
			continue
		}
		if {$item == "id"} {
			set saw_id 1
		}
		if {$item == "httpport" && $menu_var($item) == "0"} {
			continue
		}
		if {$item == "progressive" && $menu_var($item) == "0"} {
			continue
		}
		if {$item == "dontdisconnect" && $menu_var($item) == "-1"} {
			continue
		}
		if {$item == "alwaysshared" && $menu_var($item) == "-1"} {
			continue
		}

		if {[value_is_bool $item]} {
			if {[info exists menu_var($item)]} {
				if {$menu_var($item)} {
					lappend cmd "-$item"
					append rc_txt "-$item\n"
				}
			}
		} elseif {[value_is_string $item]} {
			if {[info exists menu_var($item)]} {
				if {$menu_var($item) != ""
				    && $menu_var($item) != $unset_str} {
					set nitem $item
					if {$nitem == "screen_blank"} {
						set nitem "sb"
					} elseif {$nitem == "xrandr_mode"} {
						set nitem "xrandr"
					} elseif {$nitem == "solid_color"} {
						set nitem "solid"
					}
					lappend cmd "-$nitem"
					lappend cmd $menu_var($item)
					append rc_txt "-$nitem $menu_var($item)\n"
				}
			}
		}
	}
	lappend cmd "2>"
	lappend cmd "/dev/null"
	lappend cmd "&"
	
	if {$show_rc} {
		return $rc_txt
	} else {
		return $cmd
	}
}

proc start_x11vnc {} {
	global menu_var unset_str
	global x11vnc_prog x11vnc_xdisplay
	global connected_to_x11vnc

	if {$connected_to_x11vnc} {
		append_text "\n"
		append_text "WARNING: Still connected to an x11vnc server.\n"
		append_text "WARNING: Use \"stop\" or \"detach\" first.\n"
		return 0
	}

	if {![double_check_start_x11vnc]} {
		return
	}

	set x11vnc_xdisplay ""
	if {[info exists menu_var(display)]} {
		if {$menu_var(display) != "" && $menu_var(display) != $unset_str} {
			set x11vnc_xdisplay $menu_var(display)
		}
	}

	set cmd [get_start_x11vnc_cmd]

	set str [join $cmd]
	regsub { -e} $str " -e \\\n   " str

	if {0} {
		puts "running: $str"
		foreach word $cmd {
			puts "   word: $word"
		}
	}

	append_text "Starting x11vnc in an iconified xterm with command:\n"
	append_text "  $str\n\n"
	catch {[eval exec $cmd]}
	after 500
	try_connect_and_query_all 3
}

proc run_remote_cmd {opts} {
	global menu_var x11vnc_prog x11vnc_cmdline x11vnc_xdisplay
	global x11vnc_auth_file x11vnc_connect_file

	set debug [in_debug_mode]

	if {[lindex $opts 0] == "-R" && [lindex $opts 1] == "noremote"} {
		set str [join $opts]
		if ![double_check_noremote] {
			append_text "skipping: x11vnc $str"
			return ""
		} else {
			append_text "running: x11vnc $str (please do \"Actions -> detach\" to clean things up)\n"
			append_text "subsequent -R/-Q commands should fail..."
		}
	}

	set cmd ""

	lappend cmd $x11vnc_prog;

	if {$x11vnc_connect_file != ""} {
		lappend cmd "-connect"
		lappend cmd $x11vnc_connect_file
	} else {
		if {$x11vnc_xdisplay != ""} {
			lappend cmd "-display"
			lappend cmd $x11vnc_xdisplay
		}
		if {$x11vnc_auth_file != ""} {
			lappend cmd "-auth"
			lappend cmd $x11vnc_auth_file
		}
	}
	lappend cmd "-sync"
	foreach word $opts {
		lappend cmd $word
	}
	lappend cmd "2>"
	lappend cmd "/dev/null"

	if {0} {
		set str [join $cmd]
		puts "running: $str"
		foreach word $cmd {
			puts "   word: $word"
		}
	}

	set output ""
	menus_disable
	stop_watch on
	catch {set output [eval exec $cmd]}
	stop_watch off
	menus_enable
	if {$debug} {
		if {[string length $output] > 100} {
			set str [string range $output 0 100]
			append_text "output: $str ...\n"
		} else {
			append_text "output: $output\n"
		}
	}
	return $output
}

proc try_connect_and_query_all {{n 2}} {
	for {set i 0} {$i < $n} {incr i} {
		if {$i > 0} {
			after 500
			append_text "trying again ...\n"
		}
		if {[try_connect]} {
			query_all
			break
		}
	}
}

proc try_connect {} {
	global x11vnc_xdisplay connected_to_x11vnc reply_xdisplay
	global menu_var unset_str

	if {! $connected_to_x11vnc} {
		if {[info exists menu_var(display)]} {
			set d $menu_var(display)
			if {$d != "" && $d != $unset_str && $d != $x11vnc_xdisplay} {
				set x11vnc_xdisplay $menu_var(display)
				append_text "Setting X display to: $x11vnc_xdisplay\n"
			}
		}
	}

	set_info "Pinging $x11vnc_xdisplay ..."
	set rargs [list "-Q" "ping"]
	set result [run_remote_cmd $rargs]

	if {[regexp {^ans=ping:} $result]} {
		regsub {^ans=ping:} $result {} reply_xdisplay
		set msg "Connected to $reply_xdisplay"
		set_info $msg
		append_text "$msg\n"
		set_connected yes
		fetch_displays
		return 1
	} else {
		set str "x11vnc server."
		if {$x11vnc_xdisplay != ""} {
			set str $x11vnc_xdisplay
		}
		set msg "No reply from $str"
		set_info $msg
		append_text "$msg\n"
		set_connected no
		return 0
	}
}

############################################################################
# main:

global env x11vnc_prog x11vnc_cmdline x11vnc_xdisplay x11vnc_connect;
global x11vnc_auth_file x11vnc_connect_file beginner_mode simple_gui_created
global helpall helptext helpremote helplabel hostname;
global all_settings reply_xdisplay always_update
global max_text_height max_text_width
global menu_var unset_str menus_disabled
global bfont ffont old_labels
global connected_to_x11vnc
global delay_sleep extra_sleep extra_sleep_split
global cache_all_query_vars

set unset_str "(unset)"
set connected_to_x11vnc 0
set menus_disabled 0
set max_text_height 40
set max_text_width 90
set bfont "-adobe-helvetica-bold-r-*-*-*-120-*-*-*-*-*-*"
set ffont "fixed"
set help_indent 24;
set reply_xdisplay ""
set all_settings "None so far."
set always_update 1
set cache_all_query_vars ""

# these are no longer used under x11vnc -sync:
set delay_sleep 350
set extra_sleep 1000
set extra_sleep_split 4

if {[regexp {^[34]} $tk_version] || $tk_version == "8.0"} {
	set old_labels 1
} else {
	set old_labels 0
}

if {"$argv" == "-spit"} {
	set fh [open $argv0 r]
	puts "/*"
	puts " * tkx11vnc.h: generated by 'tkx11vnc -spit'"
	puts " * Abandon all hope, ye who enter here..."
	puts " * ...edit tkx11vnc instead."
	puts " */"
	puts "	char gui_code\[\] ="
	while {[gets $fh line] > -1} {
		regsub -all {\\} $line {\\\\} line
		regsub -all {"} $line {\\"} line
		puts "\"$line\\n\""
	}
	close $fh
	puts ";"
	exit 0
}

# Read environment for clues:
if {[info exists env(X11VNC_PROG)]} {
	set x11vnc_prog $env(X11VNC_PROG);
} else {
	set x11vnc_prog "x11vnc";
}

if {[info exists env(X11VNC_CMDLINE)]} {
	set x11vnc_cmdline $env(X11VNC_CMDLINE);
} else {
	set x11vnc_cmdline "";
}

if {[info exists env(X11VNC_CONNECT)]} {
	set x11vnc_connect 1
} else {
	set x11vnc_connect 0;
}

if {[info exists env(X11VNC_CONNECT_FILE)]} {
	set x11vnc_connect_file $env(X11VNC_CONNECT_FILE);
} else {
	set x11vnc_connect_file "";
}

if {[info exists env(X11VNC_XDISPLAY)]} {
	set x11vnc_xdisplay $env(X11VNC_XDISPLAY);
	set x11vnc_connect 1

} elseif {$argv != "" && [regexp {:[0-9]} $argv]} {
	set x11vnc_xdisplay "$argv"
	set x11vnc_connect 1

} elseif {[info exists env(DISPLAY)]} {
	set x11vnc_xdisplay $env(DISPLAY);
} else {
	set x11vnc_xdisplay ":0";
}

if {[info exists env(X11VNC_AUTH_FILE)]} {
	set x11vnc_auth_file $env(X11VNC_AUTH_FILE)
} else {
	set x11vnc_auth_file ""
}

set simple_gui_created 0
if {[info exists env(X11VNC_SIMPLE_GUI)]} {
	set beginner_mode 1
} else {
	set beginner_mode 0
}


set hostname [exec uname -n]
#puts [exec env]
#puts "x11vnc_xdisplay: $x11vnc_xdisplay"

set env(X11VNC_STD_HELP) 1

# scrape the help output for the text and remote control vars:
parse_help;
parse_remote_help;
parse_query_help;

# tweaks to duplicate help text:
tweak_remote_help lock deny
tweak_remote_help unlock deny

tweak_both quiet q
tweak_help logfile o
tweak_both xwarppointer xwarp
tweak_both screen_blank sb

set_template

set_name "tkx11vnc"
make_widgets;

menu_bindings;
key_bindings;

if {$x11vnc_connect} {
	try_connect_and_query_all
}
set_widgets

# main loop.