#!/usr/bin/wish4.2
#  graphcolpos - Graph expenses by category
#
#  Written by Arlindo L. Oliveira (aml@inesc.pt)
#
#  Copyright (C) 1996  Arlindo L. Oliveira (aml@inesc.pt)
#
# $Id: graphcolpos,v 1.1.1.1 1999/12/18 02:06:55 curt Exp $


proc skip {cnt} {
   global use
        
   set use($cnt) 0
}


if { [file exists "$env(HOME)/.cbbrc.tcl"] } {
    source "$env(HOME)/.cbbrc.tcl"            
}


set data(0,1) " "
set cnt 1
frame .check
set iter 1

set skipped 0

frame .check.list_$iter
button .check.ok -text Ok -command {destroy .check}
button .check.clear -text "Clear all" -command \
        {for {set ii 1} {$ii < $cnt} {incr ii} {set use($ii) 0}}
button .check.set -text "Set all" -command \
        {for {set ii 1} {$ii < $cnt} {incr ii} {set use($ii) 1}}
pack .check.ok -side top -fill x
pack .check.clear -side top -fill x
pack .check.set -side top -fill x
pack .check.list_$iter -side left -anchor n
while {[gets stdin line] >= 1} {
    set data($cnt,0) [lindex $line 0]
    set data($cnt,1) [lindex $line 1]
     
    set use($cnt) 1
    # This line here is different for the ones that take both pos and neg
    if {$data($cnt,1) > 0  || \
	    [string range $data($cnt,0) 0 0] == "\["} { skip $cnt }

    checkbutton .check.list_$iter.but_$cnt -variable use($cnt) \
	    -font $cbb(msg_text_font) \
	    -text $data($cnt,0)
    pack .check.list_$iter.but_$cnt -anchor w
    if {$cnt % 20 == 0} {
	incr iter
	frame .check.list_$iter
	pack .check.list_$iter -side left -anchor n
    }
    incr cnt   
}

pack .check
tkwait window .check
for {set i 1} {$i < $cnt} {incr i} {
   if {$use($i) == 0} {
       incr skipped
   } else {
       set data([expr $i-$skipped],0) $data($i,0)
       set data([expr $i-$skipped],1) $data($i,1)
   }
}

set cnt [expr $cnt-$skipped]


proc graphData {graph row col} {
    global data 


    return $data($row,$col)
}

proc graphCols {canvas} {
    return 1
}

proc graphRows {canvas} {
    global cnt
    return [expr $cnt-1]
}

#
# createColumnGraph
# rows : number of data rows 1 ... rows
# cols : number of data cols 1 ... cols
# data(0,i) contains data labels
# data(i,0) contains abcissa labels
#

set barColors(1) "blue"
set barColors(2) "green"
set barColors(3) "red"
set barColors(4) "yellow"
set barColors(5) "brown"

proc graphColor {i} {
    global barColors

    return $barColors($i)
}

proc defGraphMargin {} {
    return 90
}

proc defGraphHeight {} {
    return 480
}

proc defGraphWidth {} {
    return 640
}

proc defGraphWinHeight {} {
    return [expr [defGraphHeight]+2*[defGraphMargin]]
}

proc defGraphWinWidth {} {
    return [expr [defGraphWidth]+[defGraphMargin]+[defGraphMargin]]
}

proc createColumnGraph {graphName {canv 0}} {
    global graphCnt canvas cbb

    set cols [graphCols $graphName]
    set rows [graphRows $graphName]

    wm withdraw .
    if {$canv == 0} {
        toplevel .graph$graphCnt
        set canvas [canvas .graph$graphCnt.graph -width [defGraphWinWidth] \
                -height [defGraphWinHeight] -bg white]
        button .graph$graphCnt.dismiss -text dismiss \
                -command {destroy .}
        button .graph$graphCnt.print -text Print \
                -command {
                        toplevel .m
                        message .m.msg -font 12x24 -text "Printing to file colpos.ps"
                        pack .m.msg
                        wm geometry .m +300+300
                        after 2000 {destroy .m}
                        $canvas postscript -file colpos.ps -pagewidth 19c
                }


    }

    pack $canvas 
    pack .graph$graphCnt.dismiss -fill x
    pack .graph$graphCnt.print -fill x

    
    #
    # Width of each bar
    #
    
    set gw [defGraphWidth]
    set gh [defGraphHeight]
    set gm [defGraphMargin]

    if {$cols == 1} {
        set cw [expr $gw/$rows]
        set rs $cw
    } else {
        set cw [expr [defGraphWidth]/($rows)/($cols+1)]
        set rs [expr [defGraphWidth]/$rows]
    }
    
    #
    # Find scale factor
    #
    
    set max 0
    for {set j 1} {$j <= $cols} {incr j} {
        for {set i 1} {$i <= $rows} {incr i} {
            set x [graphData graphName $i $j]
            if {$x < 0} {set x [expr -$x]}
            if {$max < $x} {set max $x} 
        }
    }
    for {set i 1} {$i < 10000000} {set i [expr 10*$i]} {
        if {$i < $max} {set divider $i}
    }
    set max [expr ($max/$divider+1)*$divider]
    set yscale [expr $gh/1.0/$max]
    set zero [expr $gh+$gm]
    set nlevels [expr $rows/8]
    if {$nlevels == 0} {set nlevels 1}


    #
    # Draw axes
    # 

    $canvas create rect $gm $zero [expr $gm+$gw] [expr $zero-$gh] \
            -fill gray80 -outline gray80
    $canvas create line $gm $zero [expr $gm+$gw] $zero
    $canvas create line $gm $zero $gm [expr $zero-$gh-12]  -arrow last
    
    for {set i 0} {$i <= 10} {incr i} {
        set label [expr $i/10.0*$max]
        $canvas create text [expr $gm-6] [expr $gm+$gh-$label/$max*$gh] \
                -anchor e -text $label
        $canvas create line \
                [expr $gm-4] [expr $gm+$gh-$label/$max*$gh] \
                [expr $gm] [expr $gm+$gh-$label/$max*$gh]
    }
    
    #
    # Draw legends
    #
    
    for {set i 1} {$i <= $cols} {incr i} {
#        $canvas create rect \
#                [expr $gm+$gw+$gm/2] [expr $gm+40*$i] \
#                [expr $gm+$gw+$gm+$gm/2] [expr $gm+40*$i+15] \
#                -fill [graphColor $i]
        $canvas create text \
                [expr $gm+$gw+$gm/2+10] [expr $gm+40*$i+18] \
                -anchor n -text [graphData $graphName 0 $i]
        
    }
    
    #
    # Draw rectangles
    #
    
    for {set j 1} {$j <= $cols} {incr j} {
        for {set i 1} {$i <= $rows} {incr i} {
            set x [expr -[graphData $graphName $i $j]]
            if {$x < 0} {
                set x [expr -$x]
                set color red
            } else {
                set color blue
            }
            set x1 [expr ($i-1)*$rs+($j-1)*$cw+$gm]
            set y1 $zero
            set x2 [expr ($i-1)*$rs+$cw*$j+$gm]
            set y2 [expr $zero-$yscale*$x]

            
            #
            # Draw labels
            #
            
            if {$j == 1} {
                
                set tx [expr $cols*$cw/2+($i-1)*$rs+$gm]
                set tt [graphData $graphName $i 0] 
                set tt [string range $tt 0 7]
                $canvas create text $tx \
                        [expr $zero+6+(($i-1) % $nlevels)*13] -anchor n  \
                        -font $cbb(msg_text_font) \
                        -text $tt
            }

            $canvas create rect $x1 $y1 $x2 $y2 -fill $color
        }
    }
}
set graphCnt 0
createColumnGraph lixo 0