From 9ea4e9fc1b4775a0e6b1c387a2a0965686c1c20e Mon Sep 17 00:00:00 2001
From: mescalinum <mescalinum@users.sourceforge.net>
Date: Fri, 14 Oct 2011 21:32:49 +0000
Subject: reorder tcl land into namespaces and streamline and standardize
 syntax

svn path=/trunk/externals/loaders/tclpd/; revision=15600
---
 examples/binbuf-test.tcl     |  21 +-
 examples/bitmap.tcl          | 546 +++++++++++++++++++++----------------------
 examples/dynreceive.tcl      |  84 +++----
 examples/dynroute.tcl        |  74 +++---
 examples/list_change-help.pd |  42 ++--
 examples/list_change.tcl     |  47 ++--
 examples/slider2.tcl         | 366 ++++++++++++++---------------
 7 files changed, 589 insertions(+), 591 deletions(-)

(limited to 'examples')

diff --git a/examples/binbuf-test.tcl b/examples/binbuf-test.tcl
index 9c9117f..62fc8c1 100644
--- a/examples/binbuf-test.tcl
+++ b/examples/binbuf-test.tcl
@@ -1,15 +1,12 @@
-package require Tclpd 0.2.2
-package require TclpdLib 0.18
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
-pd::class binbuf-test {
-    constructor {
-        pd::add_outlet $self list
-    }
-
-    destructor {
-    }
+proc binbuf-test::constructor {self args} {
+    pd::add_outlet $self list
+}
 
-    0_bang {
-        pd::outlet $self 0 list [pd::get_binbuf $self]
-    }
+proc binbuf-test::0_bang {self} {
+    pd::outlet $self 0 list [pd::get_binbuf $self]
 }
+
+pd::class binbuf-test
diff --git a/examples/bitmap.tcl b/examples/bitmap.tcl
index 43241d2..97b9491 100644
--- a/examples/bitmap.tcl
+++ b/examples/bitmap.tcl
@@ -1,5 +1,5 @@
-package require Tclpd 0.2.2
-package require TclpdLib 0.17
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
 set ::script_path [file dirname [info script]]
 
@@ -27,320 +27,320 @@ pd::guiproc bitmap_draw_new {self c x y config data} {
         -outline $fgcolor -tags [list $self border$self]
 }
 
-pd::guiclass bitmap {
-    constructor {
-        set s [file join $::script_path properties.tcl]
-        sys_gui "source {$s}\n"
+proc+ bitmap::constructor {self args} {
+    set s [file join $::script_path properties.tcl]
+    sys_gui "source {$s}\n"
 
-        pd::add_outlet $self float
+    pd::add_outlet $self float
 
-        # set defaults:
-        set @config [list]
-        lappend @config -uwidth 8
-        lappend @config -uheight 8
-        lappend @config -cellsize 16
-        lappend @config -label ""
-        lappend @config -labelpos "top"
-        lappend @config -sendsymbol ""
-        lappend @config -receivesymbol ""
-        lappend @config -fgcolor "#000000"
-        lappend @config -bgcolor "#ffffff"
-        lappend @config -lblcolor "#000000"
-        set @data {
-            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-        }
-        # expanded ($n) send/recv symbols:
-        set @send {}
-        set @recv {}
+    # set defaults:
+    set @config [list]
+    lappend @config -uwidth 8
+    lappend @config -uheight 8
+    lappend @config -cellsize 16
+    lappend @config -label ""
+    lappend @config -labelpos "top"
+    lappend @config -sendsymbol ""
+    lappend @config -receivesymbol ""
+    lappend @config -fgcolor "#000000"
+    lappend @config -bgcolor "#ffffff"
+    lappend @config -lblcolor "#000000"
+    set @data {
+        0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+        0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+        0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+        0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+    }
+    # expanded ($n) send/recv symbols:
+    set @send {}
+    set @recv {}
 
-        ::$self 0 config {*}$args
+    0_config $self {*}$args
 
-        set @rcvLoadData {#bitmap}
-        pd_bind [tclpd_get_instance_pd $self] [gensym $@rcvLoadData]
-    }
+    set @rcvLoadData {#bitmap}
+    pd_bind [tclpd_get_instance_pd $self] [gensym $@rcvLoadData]
+}
 
-    destructor {
-        set pdself [tclpd_get_instance_pd $self]
-        if {$@rcvLoadData != {}} {
-            #should not happen!
-            pd_unbind $pdself [gensym $@rcvLoadData]
-        }
-        if {[dict get $@config -receivesymbol] != {}} {
-            pd_unbind $pdself $@recv
-        }
+proc+ bitmap::destructor {self} {
+    set pdself [tclpd_get_instance_pd $self]
+    if {$@rcvLoadData != {}} {
+        #should not happen!
+        pd_unbind $pdself [gensym $@rcvLoadData]
+    }
+    if {[dict get $@config -receivesymbol] != {}} {
+        pd_unbind $pdself $@recv
     }
+}
 
-    0_config {
-        if {$args == {}} {
-            return $@config
-        } else {
-            set newconf [list]
-            set optlist [pd::strip_selectors $args]
-            set optlist [pd::strip_empty $optlist]
-            for {set i 0} {$i < [llength $optlist]} {} {
-                set k [lindex $optlist $i]
-                if {![dict exists $@config $k]} {
-                    return -code error "unknown option '$k'"
-                }
-                incr i
-                set v [lindex $optlist $i]
-                if {[lsearch -exact {-uwidth -uheight -cellsize} $k] != -1} {
-                    set v [expr {int($v)}]
-                }
-                dict set newconf $k $v
-                incr i
+proc+ bitmap::0_config {self args} {
+    if {$args == {}} {
+        return $@config
+    } else {
+        set newconf [list]
+        set optlist [pd::strip_selectors $args]
+        set optlist [pd::strip_empty $optlist]
+        for {set i 0} {$i < [llength $optlist]} {} {
+            set k [lindex $optlist $i]
+            if {![dict exists $@config $k]} {
+                return -code error "unknown option '$k'"
             }
-            if {[dict get $@config -uwidth] != [dict get $newconf -uwidth] ||
-                [dict get $@config -uheight] != [dict get $newconf -uheight]} {
-                $self 0 resize {*}[pd::add_selectors [list \
-                    [dict get $newconf -uwidth] \
-                    [dict get $newconf -uheight] \
-                    ]]
+            incr i
+            set v [lindex $optlist $i]
+            if {[lsearch -exact {-uwidth -uheight -cellsize} $k] != -1} {
+                set v [expr {int($v)}]
             }
-            set ui 0
-            foreach opt {label labelpos cellsize fgcolor bgcolor lblcolor} {
-                set old [dict get $@config -$opt]
-                if {[dict exists $newconf -$opt]} {
-                    set new [dict get $newconf -$opt]
-                    if {$old != $new} {
-                        dict set @config -$opt $new
-                        set ui 1
-                    }
+            dict set newconf $k $v
+            incr i
+        }
+        if {[dict get $@config -uwidth] != [dict get $newconf -uwidth] ||
+            [dict get $@config -uheight] != [dict get $newconf -uheight]} {
+            0_resize $self {*}[pd::add_selectors [list \
+                [dict get $newconf -uwidth] \
+                [dict get $newconf -uheight] \
+                ]]
+        }
+        set ui 0
+        foreach opt {label labelpos cellsize fgcolor bgcolor lblcolor} {
+            set old [dict get $@config -$opt]
+            if {[dict exists $newconf -$opt]} {
+                set new [dict get $newconf -$opt]
+                if {$old != $new} {
+                    dict set @config -$opt $new
+                    set ui 1
                 }
             }
-            foreach opt {sendsymbol receivesymbol} {
-                set old [dict get $@config -$opt]
-                if {[dict exists $newconf -$opt]} {
-                    set new [dict get $newconf -$opt]
-                    if {$old != $new} {
-                        if {$opt == "receivesymbol"} {
-                            set selfpd [tclpd_get_instance_pd $self]
-                            if {$old != {}} {
-                                pd_unbind $selfpd $@recv
-                            }
-                            if {$new != {}} {
-                                set @recv [canvas_realizedollar \
-                                    [tclpd_get_glist $self] [gensym $new]]
-                                pd_bind $selfpd $@recv
-                            } else {
-                                set @recv {}
-                            }
+        }
+        foreach opt {sendsymbol receivesymbol} {
+            set old [dict get $@config -$opt]
+            if {[dict exists $newconf -$opt]} {
+                set new [dict get $newconf -$opt]
+                if {$old != $new} {
+                    if {$opt == "receivesymbol"} {
+                        set selfpd [tclpd_get_instance_pd $self]
+                        if {$old != {}} {
+                            pd_unbind $selfpd $@recv
+                        }
+                        if {$new != {}} {
+                            set @recv [canvas_realizedollar \
+                                [tclpd_get_glist $self] [gensym $new]]
+                            pd_bind $selfpd $@recv
+                        } else {
+                            set @recv {}
                         }
-                        dict set @config -$opt $new
                     }
+                    dict set @config -$opt $new
                 }
             }
-            if {$ui && [info exists @c]} {
-                sys_gui [list $@c delete $self]\n
-                sys_gui [list bitmap_draw_new $self \
-                    $@c $@x $@y $@config $@data]\n
-            }
         }
-    }
-    
-    0_resize {
-        set w [pd::arg 0 int]
-        set h [pd::arg 1 int]
-        set oldw [dict get $@config -uwidth]
-        set oldh [dict get $@config -uheight]
-        set newd {}
-        for {set y 0} {$y < $h} {incr y} {
-            for {set x 0} {$x < $w} {incr x} {
-                if {$x < $oldw && $y < $oldh} {
-                    lappend newd [lindex $@data [expr {$y*$oldw+$x}]]
-                } else {
-                    lappend newd 0
-                }
-            }
+        if {$ui && [info exists @c]} {
+            sys_gui [list $@c delete $self]\n
+            sys_gui [list bitmap_draw_new $self \
+                $@c $@x $@y $@config $@data]\n
         }
-        dict set @config -uwidth $w
-        dict set @config -uheight $h
-        set @data $newd
     }
+}
 
-    0_getrow {
-        set r [list]
-        set n [pd::arg 0 int]
-        set w [dict get $@config -uwidth]
-        for {set i [expr {$n*$w}]} {$i < [expr {($n+1)*$w}]} {incr i} {
-            lappend r [list float [lindex $@data $i]]
+proc+ bitmap::0_resize {self args} {
+    set w [pd::arg 0 int]
+    set h [pd::arg 1 int]
+    set oldw [dict get $@config -uwidth]
+    set oldh [dict get $@config -uheight]
+    set newd {}
+    for {set y 0} {$y < $h} {incr y} {
+        for {set x 0} {$x < $w} {incr x} {
+            if {$x < $oldw && $y < $oldh} {
+                lappend newd [lindex $@data [expr {$y*$oldw+$x}]]
+            } else {
+                lappend newd 0
+            }
         }
-        pd::outlet $self 0 list $r
     }
+    dict set @config -uwidth $w
+    dict set @config -uheight $h
+    set @data $newd
+}
 
-    0_getcol {
-        set r [list]
-        set n [pd::arg 0 int]
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        for {set i [expr {$n}]} {$i < [expr {$w*$h}]} {incr i $w} {
-            lappend r [list float [lindex $@data $i]]
-        }
-        pd::outlet $self 0 list $r
+proc+ bitmap::0_getrow {self args} {
+    set r [list]
+    set n [pd::arg 0 int]
+    set w [dict get $@config -uwidth]
+    for {set i [expr {$n*$w}]} {$i < [expr {($n+1)*$w}]} {incr i} {
+        lappend r [list float [lindex $@data $i]]
     }
+    pd::outlet $self 0 list $r
+}
 
-    0_getcell {
-        set r [pd::arg 0 int]
-        set c [pd::arg 1 int]
-        set w [dict get $@config -uwidth]
-        pd::outlet $self 0 float [lindex $@data [expr {$r*$w+$c}]]
+proc+ bitmap::0_getcol {self args} {
+    set r [list]
+    set n [pd::arg 0 int]
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    for {set i [expr {$n}]} {$i < [expr {$w*$h}]} {incr i $w} {
+        lappend r [list float [lindex $@data $i]]
     }
+    pd::outlet $self 0 list $r
+}
 
-    0_setrow {
-        set row [pd::arg 0 int]
-        set z 1
-        set col 0
-        set w [dict get $@config -uwidth]
-        set fgcolor [dict get $@config -fgcolor]
-        set bgcolor [dict get $@config -bgcolor]
-        set colors [list $bgcolor $fgcolor]
-        for {set idx [expr {$row*$w}]} {$idx < [expr {($row+1)*$w}]} {incr idx} {
-            set d [expr {0!=[pd::arg $z int]}]
-            lset @data $idx $d
-            sys_gui [list $@c itemconfigure cell_${col}_${row}_$self \
-                -fill [lindex $colors $d]]\n
-            incr z
-            incr col
-        }
-    }
+proc+ bitmap::0_getcell {self args} {
+    set r [pd::arg 0 int]
+    set c [pd::arg 1 int]
+    set w [dict get $@config -uwidth]
+    pd::outlet $self 0 float [lindex $@data [expr {$r*$w+$c}]]
+}
 
-    0_setcol {
-        set col [pd::arg 0 int]
-        set z 1
-        set row 0
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        set fgcolor [dict get $@config -fgcolor]
-        set bgcolor [dict get $@config -bgcolor]
-        set colors [list $bgcolor $fgcolor]
-        for {set idx [expr {$col}]} {$idx < [expr {$w*$h}]} {incr idx $w} {
-            set d [expr {0!=[pd::arg $z int]}]
-            lset @data $idx $d
-            sys_gui [list $@c itemconfigure cell_${col}_${row}_$self \
-                -fill [lindex $colors $d]]\n
-            incr z
-            incr row
-        }
+proc+ bitmap::0_setrow {self args} {
+    set row [pd::arg 0 int]
+    set z 1
+    set col 0
+    set w [dict get $@config -uwidth]
+    set fgcolor [dict get $@config -fgcolor]
+    set bgcolor [dict get $@config -bgcolor]
+    set colors [list $bgcolor $fgcolor]
+    for {set idx [expr {$row*$w}]} {$idx < [expr {($row+1)*$w}]} {incr idx} {
+        set d [expr {0!=[pd::arg $z int]}]
+        lset @data $idx $d
+        sys_gui [list $@c itemconfigure cell_${col}_${row}_$self \
+            -fill [lindex $colors $d]]\n
+        incr z
+        incr col
     }
+}
 
-    0_setcell {
-        set r [pd::arg 0 int]
-        set c [pd::arg 1 int]
-        set d [expr {0!=[pd::arg 2 int]}]
-        set w [dict get $@config -uwidth]
-        set fgcolor [dict get $@config -fgcolor]
-        set bgcolor [dict get $@config -bgcolor]
-        set colors [list $bgcolor $fgcolor]
-        set idx [expr {$r*$w+$c}]
+proc+ bitmap::0_setcol {self args} {
+    set col [pd::arg 0 int]
+    set z 1
+    set row 0
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    set fgcolor [dict get $@config -fgcolor]
+    set bgcolor [dict get $@config -bgcolor]
+    set colors [list $bgcolor $fgcolor]
+    for {set idx [expr {$col}]} {$idx < [expr {$w*$h}]} {incr idx $w} {
+        set d [expr {0!=[pd::arg $z int]}]
         lset @data $idx $d
-        sys_gui [list $@c itemconfigure cell_${r}_${c}_$self \
+        sys_gui [list $@c itemconfigure cell_${col}_${row}_$self \
             -fill [lindex $colors $d]]\n
+        incr z
+        incr row
     }
+}
 
-    0_setdata {
-        set d [pd::strip_selectors $args]
-        set l [llength $d]
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        if {$l != $w*$h} {
-            return -code error "bad data size"
-        }
-        set @data [list]
-        foreach i $d {lappend @data [expr {int($i)}]}
-        if {$@rcvLoadData != {}} {
-            pd_unbind [tclpd_get_instance_pd $self] [gensym $@rcvLoadData]
-            set @rcvLoadData {}
-        }
-    }
+proc+ bitmap::0_setcell {self args} {
+    set r [pd::arg 0 int]
+    set c [pd::arg 1 int]
+    set d [expr {0!=[pd::arg 2 int]}]
+    set w [dict get $@config -uwidth]
+    set fgcolor [dict get $@config -fgcolor]
+    set bgcolor [dict get $@config -bgcolor]
+    set colors [list $bgcolor $fgcolor]
+    set idx [expr {$r*$w+$c}]
+    lset @data $idx $d
+    sys_gui [list $@c itemconfigure cell_${r}_${c}_$self \
+        -fill [lindex $colors $d]]\n
+}
 
-    object_save {
-        return [list #X obj $@x $@y bitmap {*}[pd::add_empty $@config] \; \
-            \#bitmap setdata {*}$@data \; ]
+proc+ bitmap::0_setdata {self args} {
+    set d [pd::strip_selectors $args]
+    set l [llength $d]
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    if {$l != $w*$h} {
+        return -code error "bad data size"
     }
-
-    object_properties {
-        set title "\[bitmap\] properties"
-        set x_xobj_obpd [tclpd_get_object_pd $self]
-        set x [tclpd_get_instance $self]
-        set buf [list propertieswindow %s $@config $title]\n
-        gfxstub_new $x_xobj_obpd $x $buf
+    set @data [list]
+    foreach i $d {lappend @data [expr {int($i)}]}
+    if {$@rcvLoadData != {}} {
+        pd_unbind [tclpd_get_instance_pd $self] [gensym $@rcvLoadData]
+        set @rcvLoadData {}
     }
+}
 
-    widgetbehavior_getrect {
-        lassign $args x1 y1
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        set sz [dict get $@config -cellsize]
-        set x2 [expr {1+$x1+$w*$sz}]
-        set y2 [expr {1+$y1+$h*$sz}]
-        return [list $x1 $y1 $x2 $y2]
-    }
+proc+ bitmap::save {self args} {
+    return [list #X obj $@x $@y bitmap {*}[pd::add_empty $@config] \; \
+        \#bitmap setdata {*}$@data \; ]
+}
 
-    widgetbehavior_displace {
-        set dx [lindex $args 0]
-        set dy [lindex $args 1]
-        if {$dx != 0 || $dy != 0} {
-            incr @x $dx
-            incr @y $dy
-            sys_gui [list $@c move $self $dx $dy]\n
-        }
-        return [list $@x $@y]
-    }
+proc+ bitmap::properties {self args} {
+    set title "\[bitmap\] properties"
+    set x_xobj_obpd [tclpd_get_object_pd $self]
+    set x [tclpd_get_instance $self]
+    set buf [list propertieswindow %s $@config $title]\n
+    gfxstub_new $x_xobj_obpd $x $buf
+}
 
-    widgetbehavior_select {
-        set sel [lindex $args 0]
-        set fgcolor [dict get $@config -fgcolor]
-        set bgcolor [dict get $@config -bgcolor]
-        set selcolor "blue"
-        set colors [list $selcolor $fgcolor]
-        sys_gui [list $@c itemconfigure $self \
-            -outline [lindex $colors $sel]]\n
-    }
+proc+ bitmap::widgetbehavior_getrect {self args} {
+    lassign $args x1 y1
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    set sz [dict get $@config -cellsize]
+    set x2 [expr {1+$x1+$w*$sz}]
+    set y2 [expr {1+$y1+$h*$sz}]
+    return [list $x1 $y1 $x2 $y2]
+}
 
-    widgetbehavior_activate {
+proc+ bitmap::widgetbehavior_displace {self args} {
+    set dx [lindex $args 0]
+    set dy [lindex $args 1]
+    if {$dx != 0 || $dy != 0} {
+        incr @x $dx
+        incr @y $dy
+        sys_gui [list $@c move $self $dx $dy]\n
     }
+    return [list $@x $@y]
+}
 
-    widgetbehavior_vis {
-        set @c [lindex $args 0]
-        set @x [lindex $args 1]
-        set @y [lindex $args 2]
-        set vis [lindex $args 3]
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        set sz [dict get $@config -cellsize]
-        if {$vis} {
-            sys_gui [list bitmap_draw_new $self $@c $@x $@y $@config $@data]\n
-        } else {
-            sys_gui [list $@c delete $self]\n
-        }
+proc+ bitmap::widgetbehavior_select {self args} {
+    set sel [lindex $args 0]
+    set fgcolor [dict get $@config -fgcolor]
+    set bgcolor [dict get $@config -bgcolor]
+    set selcolor "blue"
+    set colors [list $selcolor $fgcolor]
+    sys_gui [list $@c itemconfigure $self \
+        -outline [lindex $colors $sel]]\n
+}
+
+proc+ bitmap::widgetbehavior_activate {self args} {
+}
+
+proc+ bitmap::widgetbehavior_vis {self args} {
+    set @c [lindex $args 0]
+    set @x [lindex $args 1]
+    set @y [lindex $args 2]
+    set vis [lindex $args 3]
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    set sz [dict get $@config -cellsize]
+    if {$vis} {
+        sys_gui [list bitmap_draw_new $self $@c $@x $@y $@config $@data]\n
+    } else {
+        sys_gui [list $@c delete $self]\n
     }
+}
 
-    widgetbehavior_click {
-        set w [dict get $@config -uwidth]
-        set h [dict get $@config -uheight]
-        set sz [dict get $@config -cellsize]
-        set fgcolor [dict get $@config -fgcolor]
-        set bgcolor [dict get $@config -bgcolor]
-        set colors [list $bgcolor $fgcolor]
-        set xpix [expr {[lindex $args 0]-$@x-1}]
-        set ypix [expr {[lindex $args 1]-$@y-1}]
-        if {$xpix < 0 || $xpix >= $w*$sz} {return}
-        if {$ypix < 0 || $ypix >= $h*$sz} {return}
-        set shift [lindex $args 2]
-        set alt [lindex $args 3]
-        set dbl [lindex $args 4]
-        set doit [lindex $args 5]
-        if {$doit} {
-            set j [expr {$xpix/$sz}]
-            set i [expr {$ypix/$sz}]
-            set idx [expr {$w*${i}+${j}}]
-            set d [expr {[lindex $@data $idx]==0}]
-            lset @data $idx $d
-            sys_gui [list $@c itemconfigure cell_${j}_${i}_$self \
-                -fill [lindex $colors $d]]\n
-        }
+proc+ bitmap::widgetbehavior_click {self args} {
+    set w [dict get $@config -uwidth]
+    set h [dict get $@config -uheight]
+    set sz [dict get $@config -cellsize]
+    set fgcolor [dict get $@config -fgcolor]
+    set bgcolor [dict get $@config -bgcolor]
+    set colors [list $bgcolor $fgcolor]
+    set xpix [expr {[lindex $args 0]-$@x-1}]
+    set ypix [expr {[lindex $args 1]-$@y-1}]
+    if {$xpix < 0 || $xpix >= $w*$sz} {return}
+    if {$ypix < 0 || $ypix >= $h*$sz} {return}
+    set shift [lindex $args 2]
+    set alt [lindex $args 3]
+    set dbl [lindex $args 4]
+    set doit [lindex $args 5]
+    if {$doit} {
+        set j [expr {$xpix/$sz}]
+        set i [expr {$ypix/$sz}]
+        set idx [expr {$w*${i}+${j}}]
+        set d [expr {[lindex $@data $idx]==0}]
+        lset @data $idx $d
+        sys_gui [list $@c itemconfigure cell_${j}_${i}_$self \
+            -fill [lindex $colors $d]]\n
     }
 }
+
+pd::guiclass bitmap
diff --git a/examples/dynreceive.tcl b/examples/dynreceive.tcl
index 8a269f7..6903da9 100644
--- a/examples/dynreceive.tcl
+++ b/examples/dynreceive.tcl
@@ -1,53 +1,53 @@
-package require Tclpd 0.2.1
-package require TclpdLib 0.17
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
-pd::class dynreceive {
-    constructor {
-        set @sym {}
-        if {[pd::args] > 0} {
-            set @sym [pd::arg 0 symbol]
-            pd_bind [tclpd_get_instance_pd $self] [gensym $@sym]
-        }
-        pd::add_outlet $self
+proc+ dynreceive::constructor {self args} {
+    set @sym {}
+    if {[pd::args] > 0} {
+        set @sym [pd::arg 0 symbol]
+        pd_bind [tclpd_get_instance_pd $self] [gensym $@sym]
     }
+    pd::add_outlet $self
+}
 
-    destructor {
-        # don't forget to call pd_unbind, or sending things to a symbol
-        # bound to dead object will crash pd!
-        if {$@sym != {}} {
-            pd_unbind [tclpd_get_instance_pd $self] [gensym $@sym]
-        }
+proc+ dynreceive::destructor {self} {
+    # don't forget to call pd_unbind, or sending things to a symbol
+    # bound to dead object will crash pd!
+    if {$@sym != {}} {
+        pd_unbind [tclpd_get_instance_pd $self] [gensym $@sym]
     }
+}
 
-    0_set {
-        # send [set empty( to clear the receive symbol
-        set s [pd::arg 0 symbol]
-        if {$@sym != {}} {
-            pd_unbind [tclpd_get_instance_pd $self] [gensym $@sym]
-        }
-        if {$s == {empty}} {
-            set @sym {}
-        } else {
-            set @sym $s
-            pd_bind [tclpd_get_instance_pd $self] [gensym $@sym]
-        }
+proc+ dynreceive::0_set {self args} {
+    # send [set empty( to clear the receive symbol
+    set s [pd::arg 0 symbol]
+    if {$@sym != {}} {
+        pd_unbind [tclpd_get_instance_pd $self] [gensym $@sym]
     }
-
-    0_bang {
-        pd::outlet $self 0 bang
+    if {$s == {empty}} {
+        set @sym {}
+    } else {
+        set @sym $s
+        pd_bind [tclpd_get_instance_pd $self] [gensym $@sym]
     }
+}
 
-    0_float {
-        pd::outlet $self 0 float [pd::arg 0 float]
-    }
+proc+ dynreceive::0_bang {self} {
+    pd::outlet $self 0 bang
+}
 
-    0_symbol {
-        pd::outlet $self 0 symbol [gensym [pd::arg 0 symbol]]
-    }
+proc+ dynreceive::0_float {self args} {
+    pd::outlet $self 0 float [pd::arg 0 float]
+}
 
-    0_anything {
-        set sel [pd::arg 0 symbol]
-        set argz [lrange $args 1 end]
-        pd::outlet $self 0 $sel $argz
-    }
+proc+ dynreceive::0_symbol {self args} {
+    pd::outlet $self 0 symbol [gensym [pd::arg 0 symbol]]
 }
+
+proc+ dynreceive::0_anything {self args} {
+    set sel [pd::arg 0 symbol]
+    set argz [lrange $args 1 end]
+    pd::outlet $self 0 $sel $argz
+}
+
+pd::class dynreceive
diff --git a/examples/dynroute.tcl b/examples/dynroute.tcl
index 2309ac7..04cb3c9 100644
--- a/examples/dynroute.tcl
+++ b/examples/dynroute.tcl
@@ -1,5 +1,5 @@
-package require Tclpd 0.2.1
-package require TclpdLib 0.17
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
 # dynroute: dynamically route messages based on first element
 # non-matching arguments are sent to last inlet
@@ -10,48 +10,48 @@ package require TclpdLib 0.17
 # remove <atom> <float>  remove previously created routing
 # clear
 
-pd::class dynroute {
-    constructor {
-        pd::add_inlet $self list
+proc+ dynroute::constructor {self args} {
+    pd::add_inlet $self list
 
-        set @num_outlets [pd::arg 0 int]
-        if {$@num_outlets < 0} {set @num_outlets 2}
+    set @num_outlets [pd::arg 0 int]
+    if {$@num_outlets < 0} {set @num_outlets 2}
 
-        for {set i 0} {$i < $@num_outlets} {incr i} {
-            pd::add_outlet $self list
-        }
-
-        set @routing {}
+    for {set i 0} {$i < $@num_outlets} {incr i} {
+        pd::add_outlet $self list
     }
 
-    0_list {
-        set sel [pd::arg 0 any]
-        set out [expr {$@num_outlets-1}]
-        catch {set out [dict get $@routing $sel]}
-        pd::outlet $self $out list $args
-    }
+    set @routing {}
+}
 
-    1_add {
-        set sel [pd::arg 0 any]
-        set out [pd::arg 1 int]
-        if {$out < 0 || $out >= $@num_outlets} {
-            pd::post "error: add: outlet number out of range"
-            return
-        }
-        dict set @routing $sel $out
-    }
+proc+ dynroute::0_list {self args} {
+    set sel [pd::arg 0 any]
+    set out [expr {$@num_outlets-1}]
+    catch {set out [dict get $@routing $sel]}
+    pd::outlet $self $out list $args
+}
 
-    1_remove {
-        set sel [pd::arg 0 any]
-        set out [pd::arg 1 int]
-        if {$out < 0 || $out >= $@num_outlets} {
-            pd::post "error: add: outlet number out of range"
-            return
-        }
-        catch {dict unset @routing $sel $out}
+proc+ dynroute::1_add {self args} {
+    set sel [pd::arg 0 any]
+    set out [pd::arg 1 int]
+    if {$out < 0 || $out >= $@num_outlets} {
+        pd::post "error: add: outlet number out of range"
+        return
     }
+    dict set @routing $sel $out
+}
 
-    1_clear {
-        set @routing {}
+proc+ dynroute::1_remove {self args} {
+    set sel [pd::arg 0 any]
+    set out [pd::arg 1 int]
+    if {$out < 0 || $out >= $@num_outlets} {
+        pd::post "error: add: outlet number out of range"
+        return
     }
+    catch {dict unset @routing $sel $out}
+}
+
+proc+ dynroute::1_clear {self} {
+    set @routing {}
 }
+
+pd::class dynroute
diff --git a/examples/list_change-help.pd b/examples/list_change-help.pd
index 430b23d..3b3a8ba 100644
--- a/examples/list_change-help.pd
+++ b/examples/list_change-help.pd
@@ -1,21 +1,21 @@
-#N canvas 617 384 635 406 10;
-#X obj 54 240 list_change;
-#X text 144 236 right inlet sets internal value without output anything
-;
-#X obj 71 271 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1
--1;
-#X obj 54 309 print;
-#X text 33 21 Outputs its input (a list) only when it changes. You
-can set the current value using the right inlet \, or bang to force
-output;
-#X msg 117 201 list foo bar;
-#X msg 69 140 list foo bar;
-#X msg 77 163 list bar baz;
-#X msg 54 104 bang;
-#X text 98 103 output current value;
-#X connect 0 0 2 0;
-#X connect 0 0 3 0;
-#X connect 5 0 0 1;
-#X connect 6 0 0 0;
-#X connect 7 0 0 0;
-#X connect 8 0 0 0;
+#N canvas 294 76 635 406 10;
+#X obj 54 240 list_change;
+#X text 144 236 right inlet sets internal value without output anything
+;
+#X obj 71 271 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1
+-1;
+#X obj 54 309 print;
+#X text 33 21 Outputs its input (a list) only when it changes. You
+can set the current value using the right inlet \, or bang to force
+output;
+#X msg 117 201 list foo bar;
+#X msg 69 140 list foo bar;
+#X msg 77 163 list bar baz;
+#X msg 54 104 bang;
+#X text 98 103 output current value;
+#X connect 0 0 2 0;
+#X connect 0 0 3 0;
+#X connect 5 0 0 1;
+#X connect 6 0 0 0;
+#X connect 7 0 0 0;
+#X connect 8 0 0 0;
diff --git a/examples/list_change.tcl b/examples/list_change.tcl
index 2c70937..26190e4 100644
--- a/examples/list_change.tcl
+++ b/examples/list_change.tcl
@@ -1,31 +1,32 @@
-package require Tclpd 0.2.1
-package require TclpdLib 0.17
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
-pd::class list_change {
-    constructor {
-        # add second inlet (first created by default)
-        pd::add_inlet $self list
+proc+ list_change::constructor {self args} {
+    # add second inlet (first created by default)
+    pd::add_inlet $self list
 
-        # add outlet
-        pd::add_outlet $self list
+    # add outlet
+    pd::add_outlet $self list
 
-        set @curlist {}
-    }
-
-    0_list {
-        # HOT inlet
-        if {$args != $@curlist} {
-            set @curlist $args
-            pd::outlet $self 0 list $@curlist
-        }
-    }
+    set @curlist {}
+}
 
-    0_bang {
+proc+ list_change::0_list {self args} {
+    # HOT inlet
+    if {$args != $@curlist} {
+        set @curlist $args
         pd::outlet $self 0 list $@curlist
     }
+}
 
-    1_list {
-        # COLD inlet
-        set @curlist $args
-    }
+proc+ list_change::0_bang {self} {
+    if {$@curlist == {}} return
+    pd::outlet $self 0 list $@curlist
 }
+
+proc+ list_change::1_list {self args} {
+    # COLD inlet
+    set @curlist $args
+}
+
+pd::class list_change
diff --git a/examples/slider2.tcl b/examples/slider2.tcl
index 23a2141..adc2e35 100644
--- a/examples/slider2.tcl
+++ b/examples/slider2.tcl
@@ -1,5 +1,5 @@
-package require Tclpd 0.2.2
-package require TclpdLib 0.17
+package require Tclpd 0.2.3
+package require TclpdLib 0.19
 
 set ::script_path [file dirname [info script]]
 
@@ -59,215 +59,215 @@ pd::guiproc slider2_update {self c x y config state} {
     }
 }
 
-pd::guiclass slider2 {
-    constructor {
-        pd::add_outlet $self float
-        sys_gui "source {[file join $::script_path properties.tcl]}\n"
-        # set defaults:
-        set @config {
-            -width 15 -height 130 -headsz 3 -rangebottom 0 -rangetop 127
-            -init 0 -initvalue 0 -jumponclick 0 -label "" -labelpos "top"
-            -orient "vertical" -sendsymbol "" -receivesymbol ""
-            -fgcolor "#000000" -bgcolor "#ffffff" -lblcolor "#000000"
-        }
-        set @state {_min 0 _max 127 _rev 0}
-        # expanded ($n) send/recv symbols:
-        set @send {}
-        set @recv {}
-        ::$self 0 config {*}$args
+proc+ slider2::constructor {self args} {
+    pd::add_outlet $self float
+    sys_gui "source {[file join $::script_path properties.tcl]}\n"
+    # set defaults:
+    set @config {
+        -width 15 -height 130 -headsz 3 -rangebottom 0 -rangetop 127
+        -init 0 -initvalue 0 -jumponclick 0 -label "" -labelpos "top"
+        -orient "vertical" -sendsymbol "" -receivesymbol ""
+        -fgcolor "#000000" -bgcolor "#ffffff" -lblcolor "#000000"
     }
+    set @state {_min 0 _max 127 _rev 0}
+    # expanded ($n) send/recv symbols:
+    set @send {}
+    set @recv {}
+    0_config $self {*}$args
+}
 
-    destructor {
-        if {[dict get $@config -receivesymbol] != {}} {
-            pd_unbind [tclpd_get_instance_pd $self] $@recv
-        }
+proc+ slider2::destructor {self} {
+    if {[dict get $@config -receivesymbol] != {}} {
+        pd_unbind [tclpd_get_instance_pd $self] $@recv
     }
+}
 
-    0_loadbang {
-        if {[dict get $@config -init]} {$self 0 bang}
-    }
+proc+ slider2::0_loadbang {self} {
+    if {[dict get $@config -init]} {0_bang $self}
+}
 
-    0_config {
-        set newconf [list]
-        set optlist [pd::strip_selectors $args]
-        set optlist [pd::strip_empty $optlist]
-        set int_opts {-width -height -cellsize}
-        set bool_opts {-init -jumponclick}
-        set ui_opts {-fgcolor -bgcolor -lblcolor -orient -width -height}
-        set upd_opts {-rangebottom -rangetop -label -labelpos}
-        set conn_opts {-sendsymbol -receivesymbol}
-        set ui 0
-        set upd 0
-        foreach {k v} $optlist {
-            if {![dict exists $@config $k]} {
-                return -code error "unknown option '$k'"
-            }
-            if {[dict get $@config $k] == $v} {continue}
-            if {[lsearch -exact $int_opts $k] != -1} {set v [expr {int($v)}]}
-            if {[lsearch -exact $bool_opts $k] != -1} {set v [expr {int($v)!=0}]}
-            if {[lsearch -exact $ui_opts $k] != -1} {set ui 1}
-            if {[lsearch -exact $upd_opts $k] != -1} {set upd 1}
-            dict set newconf $k $v
-        }
-        # process -{send,receive}symbol
-        if {[dict exists $newconf -receivesymbol]} {
-            set new_recv [dict get $newconf -receivesymbol]
-            set selfpd [tclpd_get_instance_pd $self]
-            if {[dict get $@config -receivesymbol] != {}} {
-                pd_unbind $selfpd $@recv
-            }
-            if {$new_recv != {}} {
-                set @recv [canvas_realizedollar \
-                    [tclpd_get_glist $self] [gensym $new_recv]]
-                pd_bind $selfpd $@recv
-            } else {set @recv {}}
-        }
-        if {[dict exists $newconf -sendsymbol]} {
-            set new_send [dict get $newconf -sendsymbol]
-            if {$new_send != {}} {
-                set @send [canvas_realizedollar \
-                    [tclpd_get_glist $self] [gensym $new_send]]
-            } else {set @send {}}
-        }
-        # changing orient -> swap sizes
-        if {[dict exists $newconf -orient] && ![dict exists $newconf -width]
-            && ![dict exists $newconf -height]} {
-            dict set newconf -width [dict get $@config -height]
-            dict set newconf -height [dict get $@config -width]
-        }
-        # no errors up to this point. we can safely merge options
-        set @config [dict merge $@config $newconf]
-        # adjust reverse range
-        set a [dict get $@config -rangebottom]
-        set b [dict get $@config -rangetop]
-        dict set @state _min [expr {$a>$b?$b:$a}]
-        dict set @state _max [expr {$a>$b?$a:$b}]
-        dict set @state _rev [expr {$a>$b}]
-        set orient [dict get $@config -orient]
-        switch $orient {
-            horizontal {set dim [dict get $@config -width];  set mul  1}
-            vertical   {set dim [dict get $@config -height]; set mul -1}
-            default {return -code error "invalid value '$orient' for -orient"}
-        }
-        # recompute pix2units conversion
-        set @pix2units [expr {(2.0 * [dict get $@state _rev] - 1.0) *
-            ( [dict get $@state _max] - [dict get $@state _min] ) *
-            $mul / ( $dim - [dict get $@config -headsz])}]
-        # if ui changed, update it
-        if {$ui && [info exists @c]} {
-            sys_gui [list $@c delete $self]\n
-            sys_gui [list slider2_draw_new $self $@c $@x $@y $@config $@state]\n
-        } elseif {$upd && [info exists @c]} {
-            sys_gui [list slider2_update $self $@c $@x $@y $@config $@state]\n
-        }
-        if {[dict exists $newconf -width] || [dict exists $newconf -height]} {
-            canvas_fixlinesfor \
-                [tclpd_get_glist $self] [tclpd_get_instance_text $self]
+proc+ slider2::0_config {self args} {
+    set newconf [list]
+    set optlist [pd::strip_selectors $args]
+    set optlist [pd::strip_empty $optlist]
+    set int_opts {-width -height -cellsize}
+    set bool_opts {-init -jumponclick}
+    set ui_opts {-fgcolor -bgcolor -lblcolor -orient -width -height}
+    set upd_opts {-rangebottom -rangetop -label -labelpos}
+    set conn_opts {-sendsymbol -receivesymbol}
+    set ui 0
+    set upd 0
+    foreach {k v} $optlist {
+        if {![dict exists $@config $k]} {
+            return -code error "unknown option '$k'"
         }
+        if {[dict get $@config $k] == $v} {continue}
+        if {[lsearch -exact $int_opts $k] != -1} {set v [expr {int($v)}]}
+        if {[lsearch -exact $bool_opts $k] != -1} {set v [expr {int($v)!=0}]}
+        if {[lsearch -exact $ui_opts $k] != -1} {set ui 1}
+        if {[lsearch -exact $upd_opts $k] != -1} {set upd 1}
+        dict set newconf $k $v
     }
-    
-    0_set {
-        foreach v {min max} {set $v [dict get $@state _$v]}
-        set f [pd::arg 0 float]
-        if {$f < $min} {set f $min}
-        if {$f > $max} {set f $max}
-        dict set @config -initvalue $f
-        if {[info exists @c]} {
-            # update ui:
-            sys_gui [list slider2_update $self $@c $@x $@y $@config $@state]\n
+    # process -{send,receive}symbol
+    if {[dict exists $newconf -receivesymbol]} {
+        set new_recv [dict get $newconf -receivesymbol]
+        set selfpd [tclpd_get_instance_pd $self]
+        if {[dict get $@config -receivesymbol] != {}} {
+            pd_unbind $selfpd $@recv
         }
+        if {$new_recv != {}} {
+            set @recv [canvas_realizedollar \
+                [tclpd_get_glist $self] [gensym $new_recv]]
+            pd_bind $selfpd $@recv
+        } else {set @recv {}}
     }
-
-    0_bang {
-        foreach v {initvalue} {set $v [dict get $@config -$v]}
-        pd::outlet $self 0 float $initvalue
-        if {$@send != {}} {
-            set s_thing [$@send cget -s_thing]
-            if {$s_thing != {NULL}} {pd_float $s_thing $initvalue}
-        }
+    if {[dict exists $newconf -sendsymbol]} {
+        set new_send [dict get $newconf -sendsymbol]
+        if {$new_send != {}} {
+            set @send [canvas_realizedollar \
+                [tclpd_get_glist $self] [gensym $new_send]]
+        } else {set @send {}}
     }
-
-    0_float {
-        $self 0 set {*}$args
-        $self 0 bang
+    # changing orient -> swap sizes
+    if {[dict exists $newconf -orient] && ![dict exists $newconf -width]
+        && ![dict exists $newconf -height]} {
+        dict set newconf -width [dict get $@config -height]
+        dict set newconf -height [dict get $@config -width]
     }
-
-    object_save {
-        return [list #X obj $@x $@y slider2 {*}[pd::add_empty $@config] \;]
+    # no errors up to this point. we can safely merge options
+    set @config [dict merge $@config $newconf]
+    # adjust reverse range
+    set a [dict get $@config -rangebottom]
+    set b [dict get $@config -rangetop]
+    dict set @state _min [expr {$a>$b?$b:$a}]
+    dict set @state _max [expr {$a>$b?$a:$b}]
+    dict set @state _rev [expr {$a>$b}]
+    set orient [dict get $@config -orient]
+    switch $orient {
+        horizontal {set dim [dict get $@config -width];  set mul  1}
+        vertical   {set dim [dict get $@config -height]; set mul -1}
+        default {return -code error "invalid value '$orient' for -orient"}
     }
-
-    object_properties {
-        set c [string map {$ \\$} $@config]
-        gfxstub_new [tclpd_get_object_pd $self] [tclpd_get_instance $self] \
-            [list propertieswindow %s $c "\[slider2\] properties"]\n
+    # recompute pix2units conversion
+    set @pix2units [expr {(2.0 * [dict get $@state _rev] - 1.0) *
+        ( [dict get $@state _max] - [dict get $@state _min] ) *
+        $mul / ( $dim - [dict get $@config -headsz])}]
+    # if ui changed, update it
+    if {$ui && [info exists @c]} {
+        sys_gui [list $@c delete $self]\n
+        sys_gui [list slider2_draw_new $self $@c $@x $@y $@config $@state]\n
+    } elseif {$upd && [info exists @c]} {
+        sys_gui [list slider2_update $self $@c $@x $@y $@config $@state]\n
     }
-
-    widgetbehavior_getrect {
-        lassign $args x1 y1
-        set x2 [expr {1+$x1+[dict get $@config -width]}]
-        set y2 [expr {1+$y1+[dict get $@config -height]}]
-        return [list $x1 $y1 $x2 $y2]
+    if {[dict exists $newconf -width] || [dict exists $newconf -height]} {
+        canvas_fixlinesfor \
+            [tclpd_get_glist $self] [tclpd_get_instance_text $self]
     }
+}
 
-    widgetbehavior_displace {
-        lassign $args dx dy
-        if {$dx != 0 || $dy != 0} {
-            incr @x $dx; incr @y $dy
-            sys_gui [list $@c move $self $dx $dy]\n
-        }
-        return [list $@x $@y]
+proc+ slider2::0_set {self args} {
+    foreach v {min max} {set $v [dict get $@state _$v]}
+    set f [pd::arg 0 float]
+    if {$f < $min} {set f $min}
+    if {$f > $max} {set f $max}
+    dict set @config -initvalue $f
+    if {[info exists @c]} {
+        # update ui:
+        sys_gui [list slider2_update $self $@c $@x $@y $@config $@state]\n
     }
+}
 
-    widgetbehavior_select {
-        lassign $args sel
-        sys_gui [list $@c itemconfigure $self&&!label$self -outline [lindex \
-            [list [dict get $@config -fgcolor] {blue}] $sel]]\n
+proc+ slider2::0_bang {self} {
+    foreach v {initvalue} {set $v [dict get $@config -$v]}
+    pd::outlet $self 0 float $initvalue
+    if {$@send != {}} {
+        set s_thing [$@send cget -s_thing]
+        if {$s_thing != {NULL}} {pd_float $s_thing $initvalue}
     }
+}
 
-    widgetbehavior_vis {
-        lassign $args @c @x @y vis
-        if {$vis} {
-            sys_gui [list slider2_draw_new $self $@c $@x $@y $@config $@state]\n
-        } else {
-            sys_gui [list $@c delete $self]\n
-        }
+proc+ slider2::0_float {self args} {
+    0_set $self {*}$args
+    0_bang $self
+}
+
+proc+ slider2::save {self} {
+    return [list #X obj $@x $@y slider2 {*}[pd::add_empty $@config] \;]
+}
+
+proc+ slider2::properties {self} {
+    set c [string map {$ \\$} $@config]
+    gfxstub_new [tclpd_get_object_pd $self] [tclpd_get_instance $self] \
+        [list propertieswindow %s $c "\[slider2\] properties"]\n
+}
+
+proc+ slider2::widgetbehavior_getrect {self args} {
+    lassign $args x1 y1
+    set x2 [expr {1+$x1+[dict get $@config -width]}]
+    set y2 [expr {1+$y1+[dict get $@config -height]}]
+    return [list $x1 $y1 $x2 $y2]
+}
+
+proc+ slider2::widgetbehavior_displace {self args} {
+    lassign $args dx dy
+    if {$dx != 0 || $dy != 0} {
+        incr @x $dx; incr @y $dy
+        sys_gui [list $@c move $self $dx $dy]\n
     }
+    return [list $@x $@y]
+}
 
-    widgetbehavior_click {
-        lassign $args x y shift alt dbl doit
-        set h [dict get $@config -height]
-        set ypix [expr {[lindex $args 1]-$@y-1}]
-        if {$ypix < 0 || $ypix >= $h} {return}
-        if {$doit} {
-            switch [dict get $@config -orient] {
-                horizontal {
-                    set @motion_start_x $x
-                    set @motion_curr_x $x
-                }
-                vertical {
-                    set @motion_start_y $y
-                    set @motion_curr_y $y
-                }
-            }
-            set @motion_start_v [dict get $@config -initvalue]
-            tclpd_guiclass_grab [tclpd_get_instance $self] \
-                [tclpd_get_glist $self] $x $y
-        }
+proc+ slider2::widgetbehavior_select {self args} {
+    lassign $args sel
+    sys_gui [list $@c itemconfigure $self&&!label$self -outline [lindex \
+        [list [dict get $@config -fgcolor] {blue}] $sel]]\n
+}
+
+proc+ slider2::widgetbehavior_vis {self args} {
+    lassign $args @c @x @y vis
+    if {$vis} {
+        sys_gui [list slider2_draw_new $self $@c $@x $@y $@config $@state]\n
+    } else {
+        sys_gui [list $@c delete $self]\n
     }
+}
 
-    widgetbehavior_motion {
-        lassign $args dx dy
+proc+ slider2::widgetbehavior_click {self args} {
+    lassign $args x y shift alt dbl doit
+    set h [dict get $@config -height]
+    set ypix [expr {[lindex $args 1]-$@y-1}]
+    if {$ypix < 0 || $ypix >= $h} {return}
+    if {$doit} {
         switch [dict get $@config -orient] {
             horizontal {
-                set @motion_curr_x [expr {$dx+$@motion_curr_x}]
-                set pixdelta [expr {-1*($@motion_curr_x-$@motion_start_x)}]
+                set @motion_start_x $x
+                set @motion_curr_x $x
             }
             vertical {
-                set @motion_curr_y [expr {$dy+$@motion_curr_y}]
-                set pixdelta [expr {-1*($@motion_curr_y-$@motion_start_y)}]
+                set @motion_start_y $y
+                set @motion_curr_y $y
             }
         }
-        set f [expr {$@motion_start_v+$pixdelta*$@pix2units}]
-        $self 0 float {*}[pd::add_selectors [list $f]]
+        set @motion_start_v [dict get $@config -initvalue]
+        tclpd_guiclass_grab [tclpd_get_instance $self] \
+            [tclpd_get_glist $self] $x $y
+    }
+}
+
+proc+ slider2::widgetbehavior_motion {self args} {
+    lassign $args dx dy
+    switch [dict get $@config -orient] {
+        horizontal {
+            set @motion_curr_x [expr {$dx+$@motion_curr_x}]
+            set pixdelta [expr {-1*($@motion_curr_x-$@motion_start_x)}]
+        }
+        vertical {
+            set @motion_curr_y [expr {$dy+$@motion_curr_y}]
+            set pixdelta [expr {-1*($@motion_curr_y-$@motion_start_y)}]
+        }
     }
+    set f [expr {$@motion_start_v+$pixdelta*$@pix2units}]
+    0_float $self {*}[pd::add_selectors [list $f]]
 }
+
+pd::guiclass slider2
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