# LATER transfer the `standard' toxy setup definitions into a tcl package
# LATER think about using a slave interpreter, and a toxy-specific connection

# 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 $varname]}] == 0} {
	if {$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] }
}

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]} {
	catch {eval $path config $::toxy::itemoptions}
	unset ::toxy::itemoptions
    }

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

    if {[info exists ::toxy::masterinits]} {
	catch {eval $::toxy::masterinits}
	unset ::toxy::masterinits
    }
    if {[info exists ::toxy::typeinits]} {
	catch {eval $::toxy::typeinits}
	unset ::toxy::typeinits
    }
    if {[info exists ::toxy::iteminits]} {
	catch {eval $::toxy::iteminits}
	unset ::toxy::iteminits
    }

    ::toxy::itemgetconfig $path $target

    return
}

proc ::toxy::itemvis {tkclass path target name varname cvpath px py} {
    if {[winfo exists $path]} {
#	puts [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}
	pd $target.rp _failure $::toxy::itemerrmess \;
    }
}

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\;
}

# 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 \;]
    pd [concat $remote $i \;]
}

proc ::toxy::popup {path target remote entries args} {
    eval {menu $path.pop} $args
    set i 1
    foreach e $entries {
	$path.pop add command -label [lindex $e 0] \
	    -command [concat ::toxy::popupcommand $path $target $remote $i \
		[lindex $e [expr {[llength $e] > 1}]]]
	incr i
    }
}

# the default initializer
#> default

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

# pdtk_canvas_mouseup is a hack, which we must call anyway
bind .- <ButtonRelease> {
    eval .<|_inout 3.>
    pdtk_canvas_mouseup .^.c \
	[expr %X - [winfo rootx .^.c]] [expr %Y - [winfo rooty .^.c]] %b
}

bind .- <1> {::toxy::itemclick .| .^.c %X %Y %b 0}
bind .- <Shift-1> {::toxy::itemclick .| .^.c %X %Y %b 1}
bind .- <Control-1> {::toxy::itemclick .| .^.c %X %Y %b 2}
bind .- <Control-Shift-1> {::toxy::itemclick .| .^.c %X %Y %b 3}
bind .- <Alt-1> {::toxy::itemclick .| .^.c %X %Y %b 4}
bind .- <Alt-Shift-1> {::toxy::itemclick .| .^.c %X %Y %b 5}
bind .- <Alt-Control-1> {::toxy::itemclick .| .^.c %X %Y %b 6}
bind .- <Alt-Control-Shift-1> {::toxy::itemclick .| .^.c %X %Y %b 7}
bind .- <3> {::toxy::itemclick .| .^.c %X %Y %b 8}

bind .- <Motion> .<|_motion \
    [.^.c canvasx [expr %X - [winfo rootx .^.c]]] \
    [.^.c canvasy [expr %Y - [winfo rooty .^.c]]] 0.>
bind .- <Enter> .<|_inout 1.>
bind .- <Leave> .<|_inout 0.>

# 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}