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proc ::toxy::kb {path target remote noctaves size} {
set lft [expr {round(5 * $size)}]
set top [expr {round(5 * $size)}]
set bot [expr {round(100 * $size)}]
set dx [expr {round(17 * $size)}]
set wid [expr {round($dx - $size * .5)}]
set blbot [expr {round($bot * .65)}]
$path config -height [expr {$bot + $top}] \
-width [expr {$dx * ($noctaves * 7 + 1) + $lft * 2 - 1}]
for {set octave 0} {$octave <= $noctaves} {incr octave} {
set prevkey 0
foreach key {0 2 4 5 7 9 11} {
set ndx [expr $octave * 12 + $key]
set id [$path create rect $lft $top \
[expr {$lft + $wid}] $bot -fill white -tags $path.$ndx]
$path bind $id <1> [concat ::toxy::kbset \
$path $target $remote $ndx]
if {$key - $prevkey > 1} {
incr ndx -1
set x [expr {$lft - $wid * .22}]
set id [$path create rect $x $top [expr {$x + $wid * .44}] \
$blbot -fill black -tags $path.$ndx]
$path bind $id <1> [concat ::toxy::kbset \
$path $target $remote $ndx]
}
set prevkey $key
incr lft $dx
if {$octave == $noctaves && $key == 0} break
}
}
set ::toxy::kbval($target) 0
set ::toxy::kbcol($target) white
$path itemconfig $path.0 -fill grey
}
proc ::toxy::kbout {path target remote} {
pd [concat $target _cb $::toxy::kbval($target) \;]
if {$remote != "."} {
pd [concat $remote $::toxy::kbval($target) \;]
}
}
proc ::toxy::kbset {path target remote value} {
$path itemconfig $path.$::toxy::kbval($target) \
-fill $::toxy::kbcol($target)
set ::toxy::kbval($target) $value
set ::toxy::kbcol($target) [lindex [$path itemconfig $path.$value -fill] 4]
$path itemconfig $path.$value -fill grey
::toxy::kbout $path $target $remote
}
#> kb canvas
#. -bg yellow -cursor hand1
#. #oct 4 #size .75
#. @bang ::toxy::kbout .- .| .
#. @float ::toxy::kbset .- .| . .#1
::toxy::kb .- .| . .#oct .#size
# undo the "bind Canvas <1> {+focus %W}" in the setup part above
bind .- <FocusIn> {focus .^.c}
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