set zoneWindow .zoning_window

set HorizMerge 70

set VertMerge  70

set region_list [list]

set ordered_region_list [list]

set prev_reg_id 0

set region_data(0,x_final) 0

set region_data(0,y_final) 0

set region_data(0,x_init) -40

set region_data(0,y_init) -20

set cur_xoffset 0

set cur_yoffset 0

proc multiZone_open { filename } {

    global HorizMerge VertMerge cur_xoffset curyoffset

    set cur_xoffset 0

    set cur_yoffset 0

# 1 means success

    global IMAGE_DISPLAY_WIN ZONING_SCALE_FACTOR DISPLAY_IMAGE XV xvprocess \

	    multiZone_display_open zoneWindow

    set open 1

    if { $multiZone_display_open == $open } {

	focus .zoning_window

    } else {

	toplevel .zoning_window

	init_zoning_display 

    }

#   puts stdout "Opening $filename"

    zoned_page_open $filename

# Scale image to display    

    init_ZONING_SCALE_FACTOR

#   puts stdout "Done putting into page structure"

    if { 1 }  {

	set display_height [expr $ZONING_SCALE_FACTOR * [get_page_height]]

	set display_width [expr $ZONING_SCALE_FACTOR * [get_page_width]]

	wm geometry .zoning_window [expr int($display_width) +20]x[expr int($display_height) + 150]+300+100

	if { $DISPLAY_IMAGE == $XV } {

	    set xvprocess [exec xv $filename &]

	    puts stdout "xvprocess $xvprocess"

	} else {

# use the canvas...

	DESKEW

	zone_message  "Displaying Image"

	DISPLAY_INTERVALS .zoning_window.work_space $ZONING_SCALE_FACTOR

	zone_message  "Determining Line boundaries"

	FIND_LINES

	zone_message  " "

	}

    } else {

	popup_image_failure_win

    }

}

proc init_ZONING_SCALE_FACTOR { } {

    global ZONING_SCALE_FACTOR

    set ZONING_SCALE_FACTOR [expr 800.0/[get_page_height]]

    set temp [expr 800.0/[get_page_width]]

    puts $ZONING_SCALE_FACTOR

    puts $temp

    if {[expr $temp] < [expr $ZONING_SCALE_FACTOR] } {

	set ZONING_SCALE_FACTOR $temp

    }

    if { $ZONING_SCALE_FACTOR > 1} {

	set ZONING_SCALE_FACTOR 1

    }

}    

proc init_zoning_display { } {

    global ZONING_SCALE_FACTOR BACKGROUND FOREGROUND scroll_inc zoneWindow

    global menu_bar_height button_bar_height SMALLFONT FONT

    wm geometry $zoneWindow 600x900+300+100

    wm title $zoneWindow "CalZoning"

    wm positionfrom $zoneWindow user

    wm minsize $zoneWindow 500 300

    $zoneWindow configure -background $BACKGROUND

    set canvas_width 1000

    set canvas_height 1000

   canvas $zoneWindow.work_space -bg white -xscrollcommand \

	  "$zoneWindow.xscroller set" -yscrollcommand \

	  "$zoneWindow.yscroller set" -xscrollincrement \

	   $scroll_inc -cursor {crosshair black gray}  \

	   -width $canvas_width -height $canvas_height 

# two scrollbars

    scrollbar $zoneWindow.xscroller -command "$zoneWindow.work_space xview" -orient horizontal -background $BACKGROUND

    scrollbar $zoneWindow.yscroller -command "$zoneWindow.work_space yview" -background $BACKGROUND

    frame $zoneWindow.menu_bar -height $menu_bar_height -relief raised -bd 2 -background $BACKGROUND

    init_zoning_menu_bar

    frame $zoneWindow.message_bar -height $button_bar_height \

	    -background $BACKGROUND -relief raised -bd 2

    message $zoneWindow.message_bar.m  -background \

	    $BACKGROUND -foreground $FOREGROUND -font $SMALLFONT \

	    -justify center 

    pack $zoneWindow.menu_bar -side top -fill x

    pack $zoneWindow.message_bar -side top -fill x

    pack $zoneWindow.message_bar.m  -fill x -fill y

    pack $zoneWindow.xscroller -side bottom -fill x

    pack  $zoneWindow.yscroller -side right -fill y 

    pack $zoneWindow.work_space -side top -fill x -fill y

    $zoneWindow.work_space configure -scrollregion { 0 0 5000 5000 }

    bind $zoneWindow.work_space <Double-3> { 

	set curx [.main_window.display.work_space canvasx %x] 

	set cury [.main_window.display.work_space canvasy %y] 

	set_active_zone $curx $cury

    }

    initialize_region_grab 

}

proc max { a b } {

    if { [expr $a] > [expr $b] } {

	return $a

    } else {

	return $b

    }

}

proc init_zoning_menu_bar { } {

# this command initializes the zoning menu bar

    global BACKGROUND FOREGROUND FONT zoneWindow

    #Zoning

    menubutton $zoneWindow.menu_bar.zoning -text "Zoning"\

	    -menu $zoneWindow.menu_bar.zoning.menu -borderwidth\

	    2 -background $BACKGROUND -foreground $FOREGROUND -font $FONT

    menu $zoneWindow.menu_bar.zoning.menu -background $BACKGROUND \

	    -foreground $FOREGROUND -font $FONT

    $zoneWindow.menu_bar.zoning.menu add command -label "AutoZone..." \

	    -command popup_autozone_menu 

    $zoneWindow.menu_bar.zoning.menu add command -label "Destroy Zones" \

	    -command destroy_all_regions

    button $zoneWindow.menu_bar.scale -text "Scale Factor" \

	     -borderwidth 2 -background $BACKGROUND -foreground $FOREGROUND \

	     -relief flat \

	     -font $FONT -command popup_scale_menu

#    button $zoneWindow.menu_bar.recognize -text "Recognize All" \

#	     -borderwidth 2 -background $BACKGROUND -foreground $FOREGROUND \

#	     -relief flat \

#	     -font $FONT -command {puts "Recognize All"}

    button  $zoneWindow.menu_bar.help -text "Help"  -borderwidth 2 -background $BACKGROUND -foreground $FOREGROUND -font $FONT -relief flat \

	    -command { init_zoning_help .main_window.menu_bar.help }

   button $zoneWindow.menu_bar.close -text "Close" \

	     -borderwidth 2 -background $BACKGROUND -foreground $FOREGROUND \

	     -relief flat \

	     -font $FONT -command close_zoned_document

    pack $zoneWindow.menu_bar.zoning $zoneWindow.menu_bar.scale  \

	    $zoneWindow.menu_bar.close -side left -padx 1m -pady 1m 

    pack $zoneWindow.menu_bar.help -side right -padx 1m -pady 1m 

 }

proc popup_scale_menu { } {

# a little box for the user to change the horizontal and vertial merging

# parameters and initiate automatic zoning 

    global BACKGROUND FOREGROUND SMALLFONT FONT ZONING_SCALE_FACTOR SELECT

    if { [winfo exists .scale] } {

	focus .scale

	return

    }

    toplevel .scale -background $BACKGROUND

    wm geometry .scale 200x100+350+150

    message .scale.m -text "Scale Factor\n"  -background \

	    $BACKGROUND -foreground $FOREGROUND -font $SMALLFONT \

	    -justify center -width 200

        set gm .scale

        set var ZONING_SCALE_FACTOR

    	set varWindow  [string tolower $var]

	frame $gm.$varWindow 

	label $gm.$varWindow.l -text "Scale Factor" -width 13 -fg $FOREGROUND -background $BACKGROUND -font $FONT -justify left

	entry $gm.$varWindow.set -width 4 -relief sunken -textvariable $var -fg $FOREGROUND -background $BACKGROUND -font $FONT -selectbackground $SELECT

        $gm.$varWindow.set icursor 0

        $gm.$varWindow.set select range 0 10

        bind $gm.$varWindow.set  <Return> scale_zoned_page

	pack $gm.$varWindow.l -side left 

 	pack $gm.$varWindow.set -side right 

	pack $gm.$varWindow  -side top

    frame .scale.buttons

    button .scale.buttons.ok -text OK -command scale_zoned_page -fg $FOREGROUND -background $BACKGROUND -font $SMALLFONT -width 5

    button .scale.buttons.cancel -text Cancel -command {destroy .scale}\

	    -fg $FOREGROUND -background $BACKGROUND -font $SMALLFONT -width 5

    pack .scale.buttons.ok .scale.buttons.cancel -side left -expand 1 \

	    -fill x 	

    pack  .scale.buttons\

	   -side top -fill x

    focus $gm.$varWindow.set

}

proc popup_autozone_menu { } {

# a little box for the user to change the horizontal and vertial merging

# parameters and initiate automatic zoning 

    global BACKGROUND FOREGROUND SMALLFONT FONT HorizMerge VertMerge

    if { [winfo exists .autozone] } {

	focus .autozone

	return

    }

    toplevel .autozone -background $BACKGROUND

    wm geometry .autozone 250x225+300+150

    message .autozone.m -text "Merging Parameters\n"  -background \

	    $BACKGROUND -foreground $FOREGROUND -font $SMALLFONT \

	    -justify center -width 250

    scale .autozone.hmerge -from 0 -to 255 -variable HorizMerge \

	    -orient horizontal -label "Horizontal Merge" \

	    -background $BACKGROUND -foreground $FOREGROUND -font $SMALLFONT

    scale .autozone.vmerge -from 0 -to 255 -variable VertMerge \

	    -orient horizontal -label "Vertical Merge" -background \

	    $BACKGROUND -foreground $FOREGROUND -font $SMALLFONT

    frame .autozone.buttons

    button .autozone.buttons.ok -text OK -command autozone -fg $FOREGROUND -background $BACKGROUND -font $SMALLFONT -width 5

    button .autozone.buttons.cancel -text Cancel -command {destroy .autozone}\

	    -fg $FOREGROUND -background $BACKGROUND -font $SMALLFONT -width 5

    pack .autozone.buttons.ok .autozone.buttons.cancel -side left -expand 1 \

	    -fill x 	

   pack .autozone.m .autozone.hmerge .autozone.vmerge .autozone.buttons \

	   -side top -fill x

}

proc autozone { } {

    global HorizMerge VertMerge zoneWindow

    zone_message "Zoning Document"

    destroy_all_regions

    AUTO_ZONE $HorizMerge $VertMerge

    destroy .autozone

}

proc zone_message { msg } {

    global zoneWindow

    $zoneWindow.message_bar.m configure -text $msg \

	 -width 500 -justify center

}

set x_init 0

set y_init 0

set x_final 0

set y_final 0

set prev_region_id 0

set started_region 0

set region_count 0

proc initialize_region_grab { } {

global window

#

#

# facilitates the grabbing of a rectangle of the window

# using mouse button 1

# canvas subwindow must be called $zoneWindow.work_space

    global x_init y_init x_final y_final started_region region_data region_list region_id arrow_in_progress current_arrow zoneWindow

    bind $zoneWindow.work_space <ButtonPress-1> {

	if [expr ! $started_region] {

	    puts stdout "window: $zoneWindow \n" 

	    grab set $zoneWindow

	    set x_init [$zoneWindow.work_space canvasx %x]

	    set y_init [$zoneWindow.work_space canvasy %y]

	    start_region $x_init $y_init

	}

    }

    bind $zoneWindow.work_space <ButtonRelease-1> {

	set x_final [$zoneWindow.work_space canvasx %x]

	set y_final [$zoneWindow.work_space canvasy %y]

	end_region $x_final $y_final

	ADD_ZONE $x_init $y_init $x_final $y_final

    }

    bind $zoneWindow.work_space <B2-Motion> {

	if $arrow_in_progress {

	    set curx [$zoneWindow.work_space canvasx %x] 

	    set cury [$zoneWindow.work_space canvasy %y]

	    $zoneWindow.work_space coords $current_arrow 0 0 $curx $cury

	}

    }

    bind $zoneWindow.work_space <B1-Motion> {

	if $started_region {

	    set curx [$zoneWindow.work_space canvasx %x] 

	    set cury [$zoneWindow.work_space canvasy %y]

	    $zoneWindow.work_space coords region$region_id $x_init $y_init $curx $cury

	} 

    }

    bind $zoneWindow <Enter> {

		    SWITCH_TO_ZONED_PAGE

    }

    bind $zoneWindow <Leave> {

	# on leaving the display, release control of the mouse etc.

	# maybe make it scroll instead?

	if $started_region {

	    grab release $zoneWindow

	    set started_region 0

	    $zoneWindow.work_space coords region$region_id 0 0 0 0  

	}

    }

}

set arrow_in_progress 0

proc make_region_buttons { reg_id } {

    global region_data kill_button_data next_button_data arrow_in_progress current_arrow zoneWindow

    set x_init $region_data($reg_id,x_init)

    set y_init $region_data($reg_id,y_init)

    set next_num [$zoneWindow.work_space create rectangle $x_init $y_init [expr $x_init + 40] [expr $y_init + 20]  -fill blue -tags "region$reg_id next_button$reg_id"]

    set next_button_data($next_num,reg_id) $reg_id

    $zoneWindow.work_space bind next_button$reg_id <Double-2> {

	set reg_id $next_button_data([$zoneWindow.work_space find withtag current],reg_id)

	if { $arrow_in_progress } {

	    set canvas_x [$zoneWindow.work_space canvasx %x] 

	    set canvas_y [$zoneWindow.work_space canvasy %y]

	    finish_arrow $reg_id $canvas_x $canvas_y

	} else {

	    set canvas_x [$zoneWindow.work_space canvasx %x] 

	    set canvas_y [$zoneWindow.work_space canvasy %y]

	    start_arrow  $reg_id $canvas_x $canvas_y

	    puts stdout "Starting an arrow at $canvas_x $canvas_y"

	}

    }

    set kill_num [$zoneWindow.work_space create rectangle [expr $x_init] $y_init [expr $x_init + 20] [expr $y_init + 20] -fill red  -tags "region$reg_id kill_button$reg_id"]

    set kill_button_data($kill_num,reg_id) $reg_id

    $zoneWindow.work_space bind kill_button$reg_id <Double-2> {

	set reg_id $kill_button_data([$zoneWindow.work_space find withtag current],reg_id)

	destroy_region $reg_id $zoneWindow.work_space

    }

}

proc start_region { x y} {

    global x_init y_init x_final y_final started_region region_data region_list region_id arrow_in_progress current_arrow zoneWindow region_list

    set x_init $x

    set y_init $y

    set region_id [$zoneWindow.work_space create rectangle $x_init $y_init $x_init $y_init -outline black -width 3 ]

    $zoneWindow.work_space itemconfigure $region_id -tags region$region_id

    lappend region_list $region_id

    set started_region 1

}

proc end_region { x y } {

    global x_init y_init x_final y_final started_region region_data region_list region_id arrow_in_progress current_arrow zoneWindow

        set x_final $x

        set y_final $y

	$zoneWindow.work_space coords region$region_id $x_init $y_init $x $y

	# if finishing a rectangle, initialize its stuff in the array

	if {$x_init <= $x_final} {

	    set region_data($region_id,x_init) $x_init

	    set region_data($region_id,x_final) $x_final

	} else {

	    set region_data($region_id,x_final) $x_init

	    set region_data($region_id,x_init) $x_final

	}

	if {$y_init <= $y_final} {

	    set region_data($region_id,y_init) $y_init

	    set region_data($region_id,y_final) $y_final

	} else {

	    set region_data($region_id,y_init) $y_final

	    set region_data($region_id,y_final) $y_init

	}

	set region_data($region_id,next_region_id) 0

	lappend region_list $region_id

	make_region_buttons  $region_id	    

	set started_region 0

	grab release $zoneWindow

    }

proc start_arrow { reg_id x_start y_start } {

    global arrow_in_progress next_button_data region_data current_arrow \

	    zoneWindow prev_reg_id ordered_region_list

    set path_name $zoneWindow.work_space

# start an arrow in the middle of the little red button

    set arrow [$zoneWindow.work_space create line \

	    [expr $region_data($prev_reg_id,x_init) + 40] \

	    [expr $region_data($prev_reg_id,y_init) + 20]\

	    \

	    $x_start $y_start -width 3 -arrow last \

	    -arrowshape {6.0m 8.0m 1.5m} -fill blue -tags arrow$reg_id]

#	    [expr $region_data($prev_reg_id,x_init) + 40] \

#	    [expr $region_data($prev_reg_id,y_final)]\

    set region_data($reg_id,arrow) $arrow

    #set arrow_in_progress 1

    set current_arrow $arrow

    set prev_reg_id $reg_id

    lappend ordered_region_list $reg_id

}

proc finish_arrow { reg_id x_end y_end} {

    global arrow_in_progress next_button_data region_data current_arrow \

	    zoneWindow

    set path_name $zoneWindow.work_space

# end an arrow in the middle of the little blue button

    set arrow [$zoneWindow.work_space create line $last_arrow_x $last_arrow_y $x_end $y_end  -width 3 -arrow last -arrowshape {6.0m 8.0m 1.5m} -fill blue -tags arrow$reg_id]

    set region_data($reg_id,arrow) $arrow

    set arrow_in_progress 0

    set current_arrow $arrow

}

proc destroy_region { reg_id path_name } {

    global region_list ordered_region_list region_data prev_reg_id

    set curx [expr [expr $region_data($reg_id,x_init) \

	    + $region_data($reg_id,x_final)] /2]

    set cury [expr [expr $region_data($reg_id,y_init) \

	    + $region_data($reg_id,y_final)] /2]

    REMOVE_ZONE $curx $cury

    $path_name delete region$reg_id

    set region_list [ldelete $region_list $reg_id]

    # Now we have to delete all of the ordering

    foreach reg $ordered_region_list {

    $path_name delete arrow$reg

    set ordered_region_list [ldelete $ordered_region_list $reg]

    }

    set prev_reg_id 0

}

proc destroy_all_regions { } {

    global region_data region_list zoneWindow prev_reg_id

#    puts [array get region_list]

    foreach reg $region_list {

	destroy_region $reg $zoneWindow.work_space

    }

}