# LATER transfer the `standard' toxy setup definitions into a tcl package
# LATER think about using a slave interpreter, and a toxy-specific connection
# LATER gather aqua incompatibilities, and decide, if there is no other
# way than branching (different meaning of -bg, -borderwidth trouble,
# right click, etc.)

# LATER ask for adding something of the sort to pd.tk:
bind Canvas <1> {+focus %W}

# In order to keep the state after our canvas has been destroyed
# (i.e. our subpatch closed) -- use 'store' and 'restore' handlers,
# if defined, otherwise try setting -variable and -textvariable traces.

proc ::toxy::itemdotrace {target varname ndxname op} {
    if {[catch {set v [set $varname]} res] == 0} {
	if {$v != [set $varname.last]} {
# FIXME activate this on demand (for explicit traces)
#	    pd $target.rp _value $v \;
	    set $varname.last $v
	}
    } else { puts stderr [concat failed ::toxy::itemdotrace: $res] }
}

proc ::toxy::itembindtrace {varname mastername ndxname op} {
    set $varname [set $mastername]
}

proc ::toxy::itemsettrace {op path target varname} {
    if {[catch {$path cget $op} res] == 0} {
	if {$res == ""} {
	    if {[catch {$path config $op $varname} err]} {
		error $err
	    }
	} else {
	    if {[info tclversion] < 8.4} {
		trace variable $res w "::toxy::itembindtrace $varname"
	    } else {
		trace add variable $res write "::toxy::itembindtrace $varname"
	    }
	}
	if {![info exists $varname.last]} { set $varname.last "" }
	if {[info tclversion] < 8.4} {
	    trace variable $varname w "::toxy::itemdotrace $target"
	} else {
	    trace add variable $varname write "::toxy::itemdotrace $target"
	}
	return
    } else { return 0 }
}

# LATER revisit -- seems clumsy and fragile
proc ::toxy::itemremovetrace {op path varname} {
    if {[catch {$path cget $op} res] == 0} {
	if {$res == $varname} {
	    if {[catch {$path config $op ""} err]} {
		error $err
	    }
	} elseif {$res != ""} {
	    if {[info tclversion] < 8.4} {
		catch { trace vdelete $res w "::toxy::itembindtrace $varname" }
	    } else {
		catch { trace remove variable \
		    $res write "::toxy::itembindtrace $varname" }
	    }
	}
    }
}

proc ::toxy::itemdestroy {path varname} {
    ::toxy::itemremovetrace -variable $path $varname.var
    ::toxy::itemremovetrace -textvariable $path $varname.txt
    if {[info tclversion] < 8.4} {
	catch { unset $varname.last $varname.var $varname.txt $varname }
    } else {
	unset -nocomplain $varname.last $varname.var $varname.txt $varname
    }
    catch {destroy $path}
}

proc ::toxy::itemgetconfig {path target} {
    pd $target.rp _config $target.rp [$path cget -bg] \
	[winfo reqwidth $path] [winfo reqheight $path] \
	[catch {$path config -state normal}]\;
}

proc ::toxy::itemvisconfig {path target name varname cvpath px py} {
    if {[info exists ::toxy::itemoptions]} {
	set failed [catch {eval $path config $::toxy::itemoptions} res]
	unset ::toxy::itemoptions
	if {$failed} { error [concat in $path config: $res] }
    }

    $cvpath create window $px $py \
	-anchor nw -window $path -tags [concat toxy$name $target]

# FIXME
    if {[info exists ::toxy::storethispath]} {
# FIXME explicit traces
	set needtraces 0
    } else {
	set needtraces 1
    }

    if {$needtraces != 0} {
	if {[catch {::toxy::itemsettrace -variable \
		$path $target $varname.var} res1]} {
	    error [concat in ::toxy::itemsettrace: $res1]
	}
	if {[catch {::toxy::itemsettrace -textvariable \
		$path $target $varname.txt} res2]} {
	    error [concat in ::toxy::itemsettrace: $res2]
	}
#	puts stderr [concat traces: ($res1) ($res2)]
	if {$res1 == 0 && $res2 == 0} {
#	    puts stderr [concat toxy warning: $path untraceable]
	}
    }

    if {[info exists ::toxy::masterinits]} {
	set failed [catch {eval $::toxy::masterinits} res]
	unset ::toxy::masterinits
	if {$failed} { error [concat in ::toxy::masterinits: $res] }
    }
    if {[info exists ::toxy::typeinits]} {
	set failed [catch {eval $::toxy::typeinits} res]
	unset ::toxy::typeinits
	if {$failed} { error [concat in ::toxy::typeinits: $res] }
    }
    if {[info exists ::toxy::iteminits]} {
	set failed [catch {eval $::toxy::iteminits} res]
	unset ::toxy::iteminits
	if {$failed} { error [concat in ::toxy::iteminits: $res] }
    }

    ::toxy::itemgetconfig $path $target

    return
}

proc ::toxy::itemvis {tkclass path target name varname cvpath px py} {
    if {[winfo exists $path]} {
#	puts stderr [concat $path exists]
	set ::toxy::itemfailure 0
    } else {
	set ::toxy::itemfailure [catch {$tkclass $path} ::toxy::itemerrmess]
    }
    if {$::toxy::itemfailure == 0} {
	set ::toxy::itemfailure [catch {::toxy::itemvisconfig \
	    $path $target $name $varname $cvpath $px $py} \
	    ::toxy::itemerrmess]
    }
    if {$::toxy::itemfailure} {
	if {[winfo exists $path]} {destroy $path}
	puts stderr [concat tcl error: $::toxy::itemerrmess]
	pd $target.rp _failure \;
    }
}

# FIXME
proc ::toxy::scalecommand {target sel v} {
    pd [concat $target $sel $v \;]
}

proc ::toxy::popupcommand {path target remote i text} {
    set [$path cget -textvariable] $text
    pd [concat $target _cb $i \;]
    if {$remote != "."} {
	pd [concat $remote $i \;]
    }
}

proc ::toxy::popup {path target remote entries args} {
    if {[winfo exists $path.pop]} {
#	puts stderr [concat $path.pop exists]
    } elseif {[catch {eval {menu $path.pop} $args} err] == 0} {
	set i 0
	foreach e $entries {
	    if {$e == "."} {
		$path.pop add separator
	    } else {
		incr i
		$path.pop add command -label [lindex $e 0] \
		    -command [concat ::toxy::popupcommand \
			$path $target $remote $i \
			    [lindex $e [expr {[llength $e] > 1}]]]
	    }
	}
    } else { error [concat in ::toxy::popup: $err] }
}

# empirically, binding event coords as %X - [winfo rootx $cvpath] works
# better, than %x + [winfo x %W], or %x + t->te_xpix, LATER investigate

proc ::toxy::itemclick {target cvpath x y b f} {
    pd $target.rp _click \
	[$cvpath canvasx [expr {$x - [winfo rootx $cvpath]}]] \
	[$cvpath canvasy [expr {$y - [winfo rooty $cvpath]}]] $b $f\;
}

proc ::toxy::iteminout {target v} {
    pd [concat $target.rp _inout $v \;]
}

proc ::toxy::masterrelease {target cvpath x y b} {
    ::toxy::iteminout $target 3
# pdtk_canvas_mouseup is a hack, which we must call anyway
    pdtk_canvas_mouseup $cvpath \
	[expr {$x - [winfo rootx $cvpath]}] \
	[expr {$y - [winfo rooty $cvpath]}] $b
}

proc ::toxy::mastermotion {target cvpath x y} {
    pd $target.rp _motion \
	[$cvpath canvasx [expr {$x - [winfo rootx $cvpath]}]] \
	[$cvpath canvasy [expr {$y - [winfo rooty $cvpath]}]] 0 \;
}

proc ::toxy::masterinit {path target cvpath} {
    set topitem [expr {[string index $cvpath end-1] == "."}]
# FIXME subitem handling
    if {$topitem} {
	bind $path <ButtonRelease> \
	    "::toxy::masterrelease $target $cvpath %X %Y %b"
    }
    bind $path <1> "::toxy::itemclick $target $cvpath %X %Y %b 0"
    bind $path <Shift-1> "::toxy::itemclick $target $cvpath %X %Y %b 1"
    bind $path <Control-1> "::toxy::itemclick $target $cvpath %X %Y %b 2"
    bind $path <Control-Shift-1> "::toxy::itemclick $target $cvpath %X %Y %b 3"
    bind $path <Alt-1> "::toxy::itemclick $target $cvpath %X %Y %b 4"
    bind $path <Alt-Shift-1> "::toxy::itemclick $target $cvpath %X %Y %b 5"
    bind $path <Alt-Control-1> "::toxy::itemclick $target $cvpath %X %Y %b 6"
    bind $path <Alt-Control-Shift-1> \
	"::toxy::itemclick $target $cvpath %X %Y %b 7"
    bind $path <3> "::toxy::itemclick $target $cvpath %X %Y %b 8"

    bind $path <Motion> "::toxy::mastermotion $target $cvpath %X %Y"
    bind $path <Enter> "::toxy::iteminout $target 1"
    bind $path <Leave> "::toxy::iteminout $target 0"
}

# master initializer
#> master

::toxy::masterinit .- .| .^.c

# standard widget types

#> bang button
#. -image ::toxy::img::empty -command .<.>
#. -bg pink -activebackground red -width 50 -height 50
#. @bang .- flash .: .- invoke

#> float scale
#. -command [concat ::toxy::scalecommand .| _cb]
#. -bg pink -activebackground red -length 200
#. @float .- set .#1

#> symbol entry
#. -bg pink -font .(helvetica 24.) -width 16
#. @symbol .- delete 0 end .: .- insert 0 .#1

bind .- <Return> {eval .<[.- get].>; focus .^.c}

#> popup menubutton
#. -menu .-.pop
#. -bg purple -fg white -activebackground magenta -text popup
#. -width 8 -relief raised -borderwidth 3
#. @float if .(.#1 >= 1.) .(.-.pop invoke .#1.)
#. #items test
#. #iprops "-bg" purple "-fg" white "-activebackground" magenta "-borderwidth" 3

::toxy::popup .- .| . [concat .#items] .#iprops