foreach package {snack tkdnd tkpath} {package require $package}
namespace eval ::ix {
    proc rc {} {return [format "\#%06x" [expr "int(floor(rand() * 16777216))"]]}
    proc rgb {} {return [list [expr "int(floor(rand() * 256))"]  [expr "int(floor(rand() * 256))"]  [expr "int(floor(rand() * 256))"]]}
    proc lighten {rgb r} {set l {}; foreach c $rgb {lappend l [expr {(256 - $c) * $r + $c}]}; return $l}
    proc darken {rgb r} {set l {}; foreach c $rgb {lappend l [expr {$c - ($c * $r)}]}; return $l}
    proc color {rgb} {return [format "\#%02x%02x%02x" [expr int([lindex $rgb 0])] [expr int([lindex $rgb 1])] [expr int([lindex $rgb 2])]]}
    proc random_txt {n} {
        set i 0
        set text ""
        while {$i < $n} {
            set int [expr "int(floor(rand()*62))"]
            if {$int < 10} {incr int 48} elseif {$int < 36} {incr int 55} else {incr int 61}
            set text "$text[format %c $int]"
            incr i
        }
        return $text
    }

    proc mat_sel {p t a x y} {
	variable _
	set _($t:sc) [rc]
	switch $a {
	    first {
		foreach xy {x y}  {set _($t:c$xy) [set $xy];set _($t:f$xy) [set $xy]}
		$p.m create path [::tkpath::coords rect $_($t:cx) $_($t:cy) 0 0 -rx 12 -ry 12] \
		    -tags sel -stroke $_($t:sc) -strokewidth 12 -strokeopacity 0.3}
	    release {$p.m delete sel}
	    motion {
		mat_updatesel $p $t [mat_cleansel $p $t [$p.m find overlapping $_($t:fx) $_($t:fy) $x $y]]
		if {$x >= $_($t:cx)} {set xa $_($t:fx);set xb $x} else {set xa $x;set xb $_($t:fx)}
		if {$y >= $_($t:cy)} {set ya $_($t:fy);set yb $y} else {set ya $y;set yb $_($t:fy)}
		set w [expr {abs($xb - $xa)}]
		set h [expr {abs($yb - $ya)}]
		$p.m coords sel [::tkpath::coords rect $xa $ya $w $h -rx 12 -ry 12]
		$p.m itemconfigure sel -stroke $_($t:sc)}}}

    proc mat_item_new {p t id d} {
	variable _
	if {$id eq "-"} {
	    if {[dict keys $_($t)] eq ""} {set id 0} else {
		set id -1
		while true {if {[lsearch -integer [dict keys $_($t)] [incr id]] == -1} {break}}
	    }
	}
	set _($t:ci) $id
	mat_item_ua $p $t $id abs {x 0 xx 0 y 0 yy 0 g 0 v 1} 0
	mat_item_ua $p $t $id abs $d 0
	mat_item_draw $p $t $id
    }

    proc mat_item_draw {p t is} {
	variable _
	if {$is eq "all"} {set is [dict keys $_($t)]}
	foreach id $is {
	    set tags [list item i$id $id]
	    set color [dict get $_($t:g) $_($t:cg) color]
	    switch [dict get $_($t) $id type] {
		note {
		    $p.m create path [::tkpath::coords rect 0 0 0 0 -rx 3 -ry 3] -tags [concat $tags r] -stroke [color [lighten $color 0.4]] -strokeopacity 1.0 -fill [color $color] -fillopacity 0.08
		    $p.m create path [::tkpath::coords rect 0 0 0 0 -rx 3 -ry 3] -tags [concat $tags q] -fill [color $color] -strokewidth 0 -fillopacity 0.8
		}
		sound {
		    snack:::sound s$id
		    set filename [dict get $_($t) $id filename]
		    s$id read $filename
		    $p.m create path [::tkpath::coords rect 0 0 0 0 -rx 3 -ry 3] -tags [concat $tags r] -strokewidth 0 -fill [color $color] -fillopacity 0.08
		    $p.m create waveform 0 0 -tags [concat $tags w] -sound s$id -fill white
		    set length [expr [s$id length] / ($_($t:samplerate) + 0.0) * 1000]
		    mat_item_ua $p $t $id abs [dict create xx [expr [dict get $_($t) $id x] + $length]] 0
		    $p.m create text 0 0 -tags [concat $tags tl] -font {{bitstream vera sans} 8} -fill HotPink -anchor nw -justify left -text "[string range $length 0 10] s"
		    $p.m create rectangle 0 0 0 0 -tags [concat $tags tlr] -fill LightGreen -width 0
		    $p.m raise [$p.m find withtag "i$id && tl"]
		    $p.m create text 0 0 -tags [concat $tags tf] -font {{bitstream vera sans} 8} -fill NavyBlue -anchor ne -justify right -text $filename
		    $p.m create rectangle 0 0 0 0 -tags [concat $tags tfr] -fill gray90 -width 0
		    $p.m raise [$p.m find withtag "i$id && tf"]
		}
	    }
	    mat_redraw $p $t $id
	}
    }

    proc mat_item_delete {p t} {
	variable _
	foreach item $_($t:sel) {
	    foreach i [$p.m find withtag i$item] {
		$p.m delete $i
	    }
	    dict unset _($t) $item
	    set _($t:sel) {}
	    mat_item_info $p $t ""
	    pd [concat $t.rp _cb delete $item \;]
	}
    }

    proc mat_quant {p t y v} {
	variable _
	if {$y eq "xx"} {set y x}; if {$y eq "yy"} {set y y}
	if {$y eq "x" || $y eq "y"} {
	    set v [expr {int( ($v + $_($t:q$y) / 2.0 ) / ($_($t:q$y) + 0.0))*$_($t:q$y)}]
	}
	return $v
    }
    
    proc mat_item_pos {p t item r x y xx yy} {
	mat_item_ua $p $t $item $r [dict create x $x y $y xx $xx yy $yy] 1}

    proc mat_item_ua {p t item r u redraw} {
	variable _
	foreach a [dict keys $u] {
	    switch $r {abs {dict set _($t) $item $a [dict get $u $a]}
		rel {dict set _($t) $item $a [expr {[dict get $_($t) $item $a] + [dict get $u $a]}]}}
	    pd [concat $t.rp _cb update $item $a [pdtk_enquote [dict get $_($t) $item $a]] \;]
	}
	if {$redraw == 1} {mat_redraw $p $t $item}
    }

    proc mat_draw {p t a x y} {
	variable _
	switch $a {
	    motion {
		if {$_($t:af) == 1} {
		    mat_item_pos $p $t $_($t:ci) abs [mat_tr $p $t y i $y] [mat_tr $p $t x i $x] [mat_tr $p $t y i $_($t:fy)] [mat_tr $p $t x i $x]
		} else {
		mat_item_pos $p $t $_($t:ci) abs [mat_tr $p $t x i $x] [mat_tr $p $t y i $y] [mat_tr $p $t x i $_($t:fx)] [mat_tr $p $t y i $y]
		}
	    }
	    first {mat_item_new $p $t - [dict create type note g $_($t:cg) x 0 y 0 xx 0 yy 0 v 1]}}}

    proc mat_resize_canvas {p t a x y} {mat_viewpoint $p $t [dict create action resize x $x y $y]}

    proc mat_redraw {p t items} {
	variable _
	if {$_($t:af) == 1} {
	    array set a {x y y x xx yy yy xx}
	} else {
	    array set a {x x y y xx xx yy yy}
	}
	switch $items {
	    all {set items [dict keys $_($t)]}
	    default {}}
	foreach id $items {
	    set x [mat_tr $p $t x t [dict get $_($t) $id $a(x)]]
	    set y [mat_tr $p $t y t [dict get $_($t) $id $a(y)]]
	    set qx [mat_tr $p $t x t [mat_quant $p $t x [dict get $_($t) $id $a(x)]]]
	    set qy [mat_tr $p $t y t [mat_quant $p $t y [dict get $_($t) $id $a(y)]]]
	    set wx [expr {[dict get $_($t) $id $a(xx)] - [dict get $_($t) $id $a(x)]}]
	    if {$wx == 0} {set wx 1}
	    set sx [expr abs([mat_tr $p $t x id $wx])]
	    set qsx [expr int(abs([mat_tr $p $t x id [expr {[mat_quant $p $t x [dict get $_($t) $id $a(xx)]] - [mat_quant $p $t x [dict get $_($t) $id $a(x)]]}]]))]
	    set wy [expr {[dict get $_($t) $id $a(yy)] - [dict get $_($t) $id $a(y)]}]
	    if {$wy == 0} {set wy 1}
	    set sy [expr abs([mat_tr $p $t y id $wy])]
	    set qsy [expr int(abs([mat_tr $p $t y id [expr {[mat_quant $p $t y [dict get $_($t) $id $a(yy)]] - [mat_quant $p $t y [dict get $_($t) $id $a(y)]]}]]))]
	    set ro [expr {int( [set s$a(y)] / 2.0 )}]
	    if {[lsearch -integer $_($t:sel) $id] >= 0} {
		set color $_($t:sc)
	    } else {
		set color [color [dict get $_($t:g) [dict get $_($t) $id g] color]]
	    }
	    switch [dict get $_($t) $id type] {
		note {
		    set r [$p.m find withtag "i$id && r"]
		    set q [$p.m find withtag "i$id && q"]
		    $p.m coords $r [::tkpath::coords rect $x $y $sx $sy -rx $ro -ry $ro]
		    $p.m coords $q [::tkpath::coords rect $qx $qy $qsx $qsy  -rx $ro -ry $ro]
		    $p.m itemconfigure $q -fillopacity [dict get $_($t) $id v] -fill $color
		}
		sound {
		    set waveform [$p.m find withtag "i$id && w"]
		    set r [$p.m find withtag "i$id && r"]
#		    set ro [expr int($ro / 2.)]
		    set ro 6
		    $p.m coords $r [::tkpath::coords rect $x $y $sx $sy -rx $ro -ry $ro]
		    $p.m itemconfigure $r -fillopacity [dict get $_($t) $id v] -fill $color
		    $p.m coords $waveform $x $y
		    $p.m itemconfigure $waveform -width $sx -height [expr int($sy)]
#		    $p.m itemconfigure $waveform -width $sx
		    $p.m coords [$p.m find withtag "i$id && tl"] [expr $x + 4] [expr $y + 4]
		    $p.m coords [$p.m find withtag "i$id && tlr"] [$p.m bbox [$p.m find withtag "i$id && tl"] ]
		    $p.m coords [$p.m find withtag "i$id && tf"] [expr $x + $sx] [expr $y + 4]
		    $p.m coords [$p.m find withtag "i$id && tfr"] [$p.m bbox [$p.m find withtag "i$id && tf"] ]
		}
	    }    
	}
    }

    proc mat_item_v {p t a x y} {
	variable _
	foreach item $_($t:sel) {
	    mat_item_ua $p $t $item rel [dict create v [expr {($x - $_($t:cx)) / 100.0}]] 1
	}
	mat_item_info $p $t $_($t:sel)
    }

    proc mat_move_canvas {p t a x y} {mat_viewpoint $p $t [dict create action move x $x y $y]}

    proc mat_move_object {p t a x y} {
	variable _
	set mx [mat_tr $p $t x d [expr {$x - $_($t:cx)}]]
	set my [mat_tr $p $t y d [expr {$y - $_($t:cy)}]]
	if {$_($t:af) == 1} {
	    foreach item $_($t:sel) {mat_item_pos $p $t $item rel $my $mx $my $mx}
	} else {
	    foreach item $_($t:sel) {mat_item_pos $p $t $item rel $mx $my $mx $my}
	}
	mat_item_info $p $t $_($t:sel)
    }

    proc mat_resize_left {p t a x y} {mat_resize_object $p $t x $x $y}
    proc mat_resize_right {p t a x y} {mat_resize_object $p $t xx $x $y}    
    proc mat_resize_top {p t a x y} {mat_resize_object $p $t y $x $y}
    proc mat_resize_bottom {p t a x y} {mat_resize_object $p $t yy $x $y}  
    proc mat_resize_tl {p t a x y} {mat_resize_object $p $t x $x $y; mat_resize_object $p $t y $x $y}
    proc mat_resize_tr {p t a x y} {mat_resize_object $p $t x $x $y; mat_resize_object $p $t yy $x $y}
    proc mat_resize_bl {p t a x y} {mat_resize_object $p $t xx $x $y; mat_resize_object $p $t y $x $y}
    proc mat_resize_br {p t a x y} {mat_resize_object $p $t xx $x $y; mat_resize_object $p $t yy $x $y}

    proc mat_resize_object {p t e x y} {
	variable _
	if {$_($t:af) == 1} {
	    array set ax {x y xx y y x yy x}
	} else {
	    array set ax {x x xx x y y yy y}
	}
	set m [mat_tr $p $t $ax($e) d [expr $$ax($e) - $_($t:c$ax($e))]]
	foreach item $_($t:sel) {mat_item_ua $p $t $item rel [dict create $e $m] 1}
	mat_item_info $p $t $_($t:sel)
    }

    proc mat_cleansel {p t sel} {
	set clean {}
	foreach item $sel {if {[lindex [$p.m itemcget $item -tags] 0] eq "item"} {lappend clean [lindex [$p.m itemcget $item -tags] 2]}}
	set clean [lsort -integer -unique $clean]
	return $clean
    }

    proc mat_loc {p t si x y} {
	variable _
	if {$si == 1} {
	    set sy $y
	    set sx $x
	    set x [mat_tr $p $t x i $x] 
	    set y [mat_tr $p $t y i $y]
	} else {
	    set sy [mat_tr $p $t y t $y]
	    set sx [mat_tr $p $t x t $x]
	}
	$p.m coords lY [concat M 0 $sy L [winfo width $p.m] $sy]
	$p.m coords lX [concat M $sx 0 L $sx [winfo height $p.m]]
	$p.m itemconfigure loc -text [list $x $y]
    }

    proc mat_hover {p t x y} {
	variable _
#	mat_loc $p $t 1 $x $y
	if {[$p.m find withtag sel] ne ""} {
	    mat_sel $p $t motion $x $y
	} else {
	    set clicked [mat_cleansel $p $t [$p.m find overlapping [expr $x - 2]  [expr $y - 2] [expr $x + 2] [expr $y + 2]]]
	    if {$clicked ne ""} {
		mat_resize_modes $p $t $x $y [lindex $clicked end]
		if {[llength $_($t:sel)] <= 1} {mat_updatesel $p $t [lindex $clicked end]}
	    } else {
		mat_mode $p $t move_canvas
	    }
	}
    }
    
    proc mat_resize_modes {p t x y id} {
	variable _
	set d 3
	set dx [expr {abs([mat_tr $p $t x t [dict get $_($t) $id x]] - $x)}]
	set dxx [expr {abs([mat_tr $p $t x t [dict get $_($t) $id xx]] - $x)}]
	set dy [expr {abs([mat_tr $p $t y t [dict get $_($t) $id y]] - $y)}]
	set dyy [expr {abs([mat_tr $p $t y t [dict get $_($t) $id yy]] - $y)}]
	if {$dx < $d && $dy < $d} {
	    mat_mode $p $t resize_tl
	} elseif {$dxx < $d && $dy < $d} {
	    mat_mode $p $t resize_tr
	} elseif {$dx < $d && $dyy < $d} {
	    mat_mode $p $t resize_bl
	} elseif {$dxx < $d && $dyy < $d} {
	    mat_mode $p $t resize_br
	} elseif {$dx < 5} {
	    mat_mode $p $t resize_left
	} elseif {$dxx < 5} {
	    mat_mode $p $t resize_right
	} elseif {$dy < 1} {
	    mat_mode $p $t resize_top
	} elseif {$dyy < 1} {
	    mat_mode $p $t resize_bottom
	} else {
	    mat_mode $p $t move_object
	}
    }

    proc mat_item_info {p t clicked} {
	variable _
	set n 0;$p.m delete hover
	foreach item $clicked {
	    set info ""
	    set data  [dict get $_($t) $item] 
	    foreach d $data {lappend info [string range $d 0 7]}
	    $p.m create text [list [expr [winfo width $p.m] - 8.0] [expr [winfo height $p.m] - 8.0 - 11 * $n.0]] -fill $_($t:sc) -justify right -anchor se -font {{bitstream vera sans mono} 10} -tags hover -text $info
	    incr n		
	}}

    proc mat_togglesel {p t d} {
	variable _
	if {[lsearch -integer $_($t:sel) $d] < 0} {
	    set _($t:sel) [concat $_($t:sel) $d]
	} else {
	    set _($t:sel) [lsearch -inline -not -all -integer $_($t:sel) $d]
	}
	mat_redraw $p $t $d
    }

    proc mat_updatesel {p t ns} {
	variable _
	set os $_($t:sel)
	set _($t:sel) $ns
	mat_redraw $p $t  [lsort -unique -integer [concat $os $ns]]
	mat_item_info $p $t $ns
    }

    proc mat_click {m button action p t x y X Y} {
	variable _
	set clicked [mat_cleansel $p $t [$p.m find overlapping $x $y $x $y]]
	set a [$p.m itemcget mode -text]
	switch $action {
	    first {
		foreach xy {x y}  {set _($t:f$xy) [set $xy]}
		switch $button {
		    1 {if {$m eq "control"} {
			mat_mode $p $t draw; mat_draw $p $t $action $x $y
		    } elseif {$m eq "double" || $m eq "shift"} {
			if {[llength $clicked] > 0} {
			    mat_togglesel $p $t $clicked 
			} else {
			    mat_sel $p $t first $x $y
			    mat_mode $p $t sel
			}
		    } elseif {[$p.m find withtag sel] ne ""} {
			mat_sel $p $t release $x $y
		    } elseif {[llength $_($t:sel)] > 1 && [llength $clicked] > 0 && [lsearch $_($t:sel) $clicked] == -1} {
			mat_updatesel $p $t $clicked}}
		    2 {mat_mode $p $t resize_canvas}
		    3 {if {$clicked ne ""} {
			mat_mode $p $t item_v } else {mat_rmenu $p $t $X $Y}}}}
	    motion {eval mat_$a $p $t $action $x $y}
	    release {
		switch $button {
		    1 {if {$a eq "draw" || ($a eq "sel" && [expr {abs($_($t:fx) - $x)}] >13)} {eval mat_$a $p $t $action $x $y}}
		    2 {mat_mode $p $t move_canvas}
		    3 {mat_mode $p $t move_canvas}
		}
	    }
	}
	foreach xy {x y}  {set _($t:c$xy) [set $xy]}
    }
    
    proc mat_rmenu {p t x y} {
	variable _
	if {[winfo exists $p.rmenu] != 1} {
	    set m [menu $p.rmenu -tearoff no]
	    $m add command -label "zoom to fit" -command "::ix::mat_viewpoint $p $t {action fit}"
	    $m add command -label "reset zoom" -command "::ix::mat_viewpoint $p $t {action reset}"
	    $m add command -label "add group" -command "::ix::mat_group_new $p $t -"
	    $m add cascade -label "sel to group" -menu [menu $p.rmenu.seltogroup -tearoff no]
	    $m add command -label "flip axes" -command "::ix::mat_flipaxe $p $t"
	} else {
	    #	    $p.rmenu entryconfigure 0 -label $x
	}
	$p.rmenu.seltogroup delete 0 end
	foreach group [dict keys $_($t:g)] {
	    $p.rmenu.seltogroup add command -label [dict get $_($t:g) $group name] -command "::ix::mat_group_assign $p $t $group"
	}
	tk_popup $p.rmenu $x $y
    }

    proc mat_tr {p t d inv v} {
	variable _
	array set dm {x width y height}
	switch $inv {
	    t {return [expr {($v - $_($t:${d}a)) / ($_($t:${d}b) - $_($t:${d}a) + 0.0) * [winfo $dm($d) $p.m]}]}
	    i {return [expr {($_($t:${d}b) - $_($t:${d}a)) * $v /([winfo $dm($d) $p.m] + 0.0) + $_($t:${d}a)}]}
	    d {return [expr {($_($t:${d}b) - $_($t:${d}a)) * $v /([winfo $dm($d) $p.m] + 0.0)}]}
	    id {return [expr {$v / ($_($t:${d}b) - $_($t:${d}a) + 0.0) * [winfo $dm($d) $p.m]}]}}}

    proc mat_viewpoint {p t opts} {
	variable _
	switch [dict get $opts action] {
	    fit {
		set i 0
		dict for {s xy} $_($t) {
		    dict with xy {
		        if {$i == 0} {
			    set xa $x
			    set xb $x
			    set ya $y
			    set yb $y
			}
			if {$x > $xb} {set xb $x}
			if {$x < $xa} {set xa $x}
			if {$y > $yb} {set yb $y}
			if {$y < $ya} {set ya $y}
			if {$xx > $xb} {set xb $xx}
			if {$xx < $xa} {set xa $xx}
			if {$yy > $yb} {set yb $yy}
			if {$yy < $ya} {set ya $yy}
			incr i
		    }
		}
		set _($t:xa) $xa
		set _($t:xb) $xb
		set _($t:ya) $ya
		set _($t:yb) $yb
	    }
	    reset {
		set _($t:ya) $_($t:yao);set _($t:yb) $_($t:ybo);set _($t:xa) $_($t:xao);set _($t:xb) $_($t:xbo)
	    }
	    move {
		foreach xy {x y} {
		    set mvt [mat_tr $p $t $xy d [expr {[dict get $opts $xy] - $_($t:c$xy)}]]
		    foreach ab {a b} {set _($t:${xy}$ab) [expr {$_($t:${xy}$ab) - $mvt}]}}
	    }
	    zoom {
		array set dir {in 0.5 out 1.5}
		foreach xy [dict get $opts axe] {
		    set radius  [expr {($_($t:${xy}b) - $_($t:${xy}a)) / 2. * $dir([dict get $opts dir])}]
		    set center [mat_tr $p $t $xy i [dict get $opts $xy]]
		    set _($t:${xy}a) [expr {$center - $radius}]
		    set _($t:${xy}b) [expr {$center + $radius}]
		}
	    }
	    resize {
		foreach xy {x y} {
		    set mvt [mat_tr $p $t $xy d [expr {[dict get $opts $xy] - $_($t:c$xy)}]]
		    set _($t:${xy}a) [expr {$_($t:${xy}a) - $mvt}]
		    set _($t:${xy}b) [expr {$_($t:${xy}b) + $mvt}]}
	    }
	    scroll {
		set xy [dict get $opts axis]
		set mv [expr {($_($t:${xy}b) - $_($t:${xy}a)) / 4.0}]
		foreach ab {a b} {set _($t:${xy}$ab) [expr {[dict get $opts units] > 0 ? $_($t:${xy}$ab) + $mv : $_($t:${xy}$ab) - $mv }]}
	    }
	}
	mat_redraw $p $t all
	mat_gridlines $p $t
    }
    proc mat_flipaxe {p t} {
	variable _
	set _($t:af) [expr $_($t:af) == 1 ? 0 : 1]
	
	set ya $_($t:ya)
	set xa $_($t:xa)
	set xb $_($t:xb)
	set yb $_($t:yb)
	set qx $_($t:qx)
	set qy $_($t:qy)
	set mx $_($t:mx)
	set my $_($t:my)

	set _($t:ya) $xa
	set _($t:xa) $ya
	set _($t:yb) $xb
	set _($t:xb) $yb
	set _($t:qx) $qy
	set _($t:qy) $qx
	set _($t:mx) $my
	set _($t:my) $mx

	mat_gridlines $p $t
	mat_redraw $p $t all
    }
    proc mat_clip {p t action} {
	variable _
	switch $action {
	    selecta {
		mat_updatesel $p $t [dict keys $_($t)]
	    }
	    cut {
		set _($t:c) [dict create]
		set i 0
		foreach item $_($t:sel) {
		    dict set _($t:c) $i [dict get $_($t) $item]
		    incr i
		}
		mat_item_delete $p $t
	    }
	    copy {
		set _($t:c) [dict create]
		set i 0
		foreach item $_($t:sel) {
		    dict set _($t:c) $i [dict get $_($t) $item]
		    incr i
		}
	    }
	    paste {
		set pasted {}
		foreach item [dict keys $_($t:c)] {
		    mat_item_new $p $t - [dict get $_($t:c) $item]
		}
	    }
	}
    }
    
    proc mat_mode {p t m} {
	array set cursor {draw pencil move_canvas fleur move_object dotbox item_v box_spiral resize_canvas bogosity sel cross_reverse resize_left left_side resize_right right_side resize_top top_side resize_bottom bottom_side resize_tl top_left_corner resize_tr top_right_corner resize_bl bottom_left_corner resize_br bottom_right_corner}
	$p.m itemconfigure mode -text $m
	$p.m configure -cursor $cursor($m)
     }

    proc mat_group_assign {p t group} {
	variable _
	foreach item $_($t:sel) {
	    mat_item_ua $p $t $item abs [dict create g $group] 0
	}	
    }

    proc mat_group_new {p t grp} {
	variable _
	set exists 0
	dict for {key val} $_($t:g) {if {[dict get $val name] eq $grp} {set exists 1}}
	if {$exists == 0} {
	    if {$grp eq "-"} {set grp [random_txt [expr "int(floor(rand() * 10 + 2))"]]}
	    set n -1
	    while true { if {[lsearch -integer [dict keys $_($t:g)] [incr n]] == -1} {break}}
	    dict set _($t:g) $n name $grp
	    dict set _($t:g) $n color [rgb]
	    set _($t:cg) $n
	    mat_groups_view $p $t
	    mat_group_active $p $t $n
	}
    }

    proc mat_groups_view {p t} {
	variable _
	$p.m delete [$p.m find withtag group]
	foreach i [dict keys $_($t:g)] {
	    set id [$p.m create text [concat 68.0 [expr {38.0 + 11 * $i}]] -fill [color [dict get $_($t:g) $i color]] -justify right -anchor e -font {{bitstream vera sans mono} 10} -tags [concat group $i lb] -text [dict get $_($t:g) $i name]]
	    $p.m bind $id <Enter> "::ix::mat_group_active $p $t $i"
	    $p.m bind $id <1> "::ix::mat_group_assign $p $t $i"
	    set bx [$p.m bbox $id]
	    $p.m lower [$p.m create path [::tkpath::coords rect [lindex $bx 0] [lindex $bx 1] [expr [lindex $bx 2] - [lindex $bx 0]] [expr [lindex $bx 3] - [lindex $bx 1]] -rx 6 -ry 6] -tags [concat group $i bg] -strokewidth 1 -stroke white -fill white -fillopacity 0.5]
	}
    }

    proc mat_group_active {p t g} {
	variable _
	set _($t:cg) $g
	foreach n [dict keys $_($t:g)] {
	    if {$g == $n} {set cb black; set cl white; set tl 1} {set cb white; set cl [color [dict get $_($t:g) $n color]]; set tl 0.5}
	    set idb [$p.m find withtag "group && $n  && bg"]
	    $p.m itemconfigure $idb -fill $cb -fillopacity $tl -stroke $cl
	    set idl [$p.m find withtag "group && $n  && lb"]
	    $p.m itemconfigure $idl -fill $cl; 
	    if {$g == $n} {$p.m raise $idb;$p.m raise $idl;}
	}
    }

    proc mat_key {p t k b} {
	puts $k
	switch $b {
	    1 {
		switch $k {
		    22 {mat_item_delete $p $t}
		    38 {mat_clip $p $t selecta}
		    53 {mat_clip $p $t cut}
		    54 {mat_clip $p $t copy}
		    55 {mat_clip $p $t paste}
		    97 {mat_viewpoint $p $t {action reset}}
		    98 {mat_viewpoint $p $t {action scroll units -1 axis y}}
		    100 {mat_viewpoint $p $t {action scroll units -1 axis x}}
		    102 {mat_viewpoint $p $t {action scroll units 1 axis x}}
		    104 {mat_viewpoint $p $t {action scroll units 1 axis y}}
		    107 {mat_item_delete $p $t}
		}
	    }
# 	    0 {
# 		switch $k {
# 		}
# 	    }
	}
    }
    
    proc mat_drop {p t dropped x y} {
#	foreach d $dropped {
	    foreach d [split $dropped "\n"] {
	    set x [mat_tr $p $t x i $x] 
	    set y [mat_tr $p $t y i $y] 
	    mat_item_new $p $t - [dict create type sound g 1 v 1 x $x y $y xx $x yy $y filename [regsub -- {^file:[/]+} $d "/"]]
	}
    }

    proc mat_new {p t w h bg ln xa xb ya yb qx qy mx my samplerate} {
	variable _
	set sc orange
	foreach xy {x y} {foreach ab {a b} {set ${xy}${ab}o [set ${xy}${ab}]}}
	foreach a {sc ln xa xb ya yb xao xbo yao ybo qx qy mx my samplerate} {set _($t:$a) [set $a]}
	if {[winfo exists $p.m] != 1} {
	    canvas $p.m -bg $bg -width $w -height $h
	    pack $p.m -side left
	    bind $p.m <Key> "::ix::mat_key $p $t %k 1"
	    bind $p.m <KeyRelease> "::ix::mat_key $p $t %k 0"
#	    dnd bindtarget $p.m text/uri-list <Drop> "::ix::mat_drop $p $t %D %x %y"
	    dnd bindtarget $p.m text/plain <Drop> "::ix::mat_drop $p $t %D %x %y"
	    bind $p.m <Motion> "::ix::mat_hover $p $t %x %y"
	    bind $p.m <4> "::ix::mat_viewpoint $p $t {action scroll units 1 axis x}"
	    bind $p.m <5> "::ix::mat_viewpoint $p $t {action scroll units -1 axis x}"
	    bind $p.m <Control-4> "::ix::mat_viewpoint $p $t {action zoom dir in axe x x %x y %y}"
	    bind $p.m <Control-5> "::ix::mat_viewpoint $p $t {action zoom dir out axe x x %x y %y}"
	    bind $p.m <Alt-4> "::ix::mat_viewpoint $p $t {action zoom dir in axe {x y} x %x y %y}"
	    bind $p.m <Alt-5> "::ix::mat_viewpoint $p $t {action zoom dir out axe {x  y} x %x y %y}"
	    bind $p.m <Control-Shift-4> "::ix::mat_viewpoint $p $t {action zoom dir in axe y x %x y %y}"
	    bind $p.m <Control-Shift-5> "::ix::mat_viewpoint $p $t {action zoom dir out axe y x %x y %y}"
	    bind $p.m <Shift-4> "::ix::mat_viewpoint $p $t {action scroll units -1 axis y}"
	    bind $p.m <Shift-5> "::ix::mat_viewpoint $p $t {action scroll units 1 axis y}"
	    foreach m {"Control-" "" "Shift-" "Double-"} {
		foreach bn {1 2 3} {
		    set b [list [concat $bn first] [concat B${bn}-Motion motion] [concat ButtonRelease-$bn release]]
		    foreach ba {0 1 2} {
			bind $p.m <$m[lindex [lindex $b $ba] 0]> "::ix::mat_click [list [string tolower [string trimright $m -1]]] $bn [lindex [lindex $b $ba] 1] $p $t %x %y %X %Y"}}}
	    set bd [expr {[$p cget -bd] * 2}]
#	    update
            $p configure -bg gray -width [expr {[winfo width $p.m] + $bd}] -height [expr {[winfo height $p.m] + $bd}]
	    $p.m create text {20 20} -fill blue -justify left -anchor w -font {{bitstream vera sans} 18} -tags mode -text move_canvas
	    $p.m create text [list [expr {$w / 2.}] 5] -fill red -justify center -anchor n -font {{bitstream vera sans} 14} -tags q -text q
	    $p.m create path "M 0 0" -tags lX -stroke black -strokeopacity 0.5
	    $p.m create path "M 0 0" -tags lY -stroke black -strokeopacity 0.5
	    $p.m create text "10 $h" -fill red -justify left -anchor sw -font {{bitstream vera sans} 12 bold} -fill purple -tags loc -text ""
	    if {[info exists _($t)] != 1} {
		set _($t) {}
		set _($t:g) {}
		set af 0; set i -1; set sel {}
		foreach a {af i sel} {set _($t:$a) [set $a]}
		mat_group_new $p $t default
		mat_group_new $p $t wavs
	    } 
	}
	mat_gridlines $p $t
	mat_item_draw $p $t all
	mat_groups_view $p $t
    }
    
    proc mat_gridlines {p t} {
	variable _
	set w $p.m
	$w delete gridlines
	set gh [winfo height $w]
	set gw [winfo width $w]
	foreach item [$w find withtag gridline] {$w delete $item}
	foreach xy {x y} {
	    array set ta {x n y w}
	    array set tj {x center y left}
	    array set igx {y width x height}
	    set range [expr {abs($_($t:${xy}b) - $_($t:${xy}a))}]
	    set numshits [expr {$range / $_($t:q$xy)}]
	    if {$numshits > $_($t:m${xy})} {set factor [expr {int($numshits / ($_($t:m${xy}) + 0.0) + 1)}]} else {
		set factor [expr {1. / (int(1./($numshits / ($_($t:m${xy}) + 0.0) + 0.0)) + 0.0)}]
	    }
	    set increment [expr {$_($t:q${xy}) * $factor}]
	    for {set x [expr {int($_($t:${xy}a) / ($increment + 0.0) + 1)*($increment + 0.0)}]} {[expr {$_($t:${xy}a) > $_($t:${xy}b) ? $x >=  $_($t:${xy}b) : $x <=  $_($t:${xy}b)}]} {set x [expr {$_($t:${xy}a) > $_($t:${xy}b) ? $x - $increment : $x + $increment}]} {
		set og [mat_tr $p $t $xy t $x]
		set invgeo [winfo $igx($xy) $w]
		switch $xy {
		    y {set coords [concat M [expr {int(rand()*23)}] $og L $invgeo $og]}
		    x {set coords [concat M $og  [expr {int(rand()*16)}] L $og $invgeo]}}
#		    y {set coords [concat M 0 $og L $invgeo $og]}
#		    x {set coords [concat M $og 0 L $og $invgeo]}}
		$w lower [$w create text [lrange $coords 1 2] -font {{Bitstream Vera Sans} 8} -fill [rc] -anchor $ta($xy) -text [string range $x 0 7] -justify $tj($xy) -tags gridline]
		$w lower [$w create path $coords -stroke $_($t:ln) -strokedasharray [expr {int(rand()*42 + 1)}] -tags gridline -strokewidth 1]
	    }}}}

#> mat frame
#. -bd 3 #w 384 #h 144 #bg gray86 #ln white
#. #samplerate 44100
#. #Xa 123 #Xb 2000 #Ya 127 #Yb 0 #qx 50 #qy 1 #mx 12 #my 64
#. @add ::ix::mat_item_new .- .| .#1 {type .#2}
#. @update  ::ix::mat_item_ua .- .| .#1 abs {.#2 .#3} 1
#. @updaterel  ::ix::mat_item_ua .- .| .#1 rel {.#2 .#3} 1
#. @up  ::ix::mat_item_ua .- .| .#1 abs {.#2 .#3} 0
#. @uprel  ::ix::mat_item_ua .- .| .#1 rel {.#2 .#3} 0
puts "mat .- .|"
::ix::mat_new .- .| .#w .#h .#bg .#ln .#Xa .#Xb .#Ya .#Yb .#qx .#qy .#mx .#my .#samplerate
#bind .-.m <Enter> {focus .-.m}
bind .-.m <Leave> {focus .^.c}