functor
import Tk
export 'class' : DtreeFrame
define
DB = o(
bg : ivory
word : o(font : o(family:helvetica
weight:bold
size :12)
color: black)
label: o(font : o(family:fixed
weight:normal
size :12)
color: black)
vstep: 15
hstep: 5
margin : o(top:20 left:20)
vline: o(color:orange width:2)
sline: o(color:slateblue width:2)
)
class Font from Tk.font
attr ascent descent
meth tkInit(...) = M
Tk.font,M
ascent <- {Tk.returnInt font(metrics self ascent:unit)}
descent<- {Tk.returnInt font(metrics self descent:unit)}
end
meth measure(Text $)
{Tk.returnInt font(measure self Text)}
end
meth getAscent($) @ascent end
meth getDescent($) @descent end
end
WordFont = {New Font tkInit(family:DB.word.font.family
weight:DB.word.font.weight
size :DB.word.font.size)}
LabelFont= {New Font tkInit(family:DB.label.font.family
weight:DB.label.font.weight
size :DB.label.font.size)}
class DtreeFrame from Tk.frame
attr canvas tag
meth tkInit(...)=M
Tk.frame,M
canvas <- {New Tk.canvas tkInit(parent:self bg:DB.bg)}
tag <- {New Tk.canvasTag tkInit(parent:@canvas)}
H = {New Tk.scrollbar tkInit(parent:self orient:horizontal)}
V = {New Tk.scrollbar tkInit(parent:self orient:vertical)}
in
{@canvas tk(configure scrollregion:q(0 0 0 0))}
{Tk.addXScrollbar @canvas H}
{Tk.addYScrollbar @canvas V}
{Tk.batch [grid(rowconfigure self 0 weight:1)
grid(columnconfigure self 0 weight:1)
grid(@canvas row:0 column:0 sticky:nswe)
grid(H row:1 column:0 sticky:we)
grid(V row:0 column:1 sticky:ns)]}
end
meth clear {@canvas tk(delete @tag)} end
meth show(L)
{self clear}
Nodes = {Map L
fun {$ X}
o(string:X.string label:X.label
index:X.index parent:{CondSelect X parent unit}
height:_ left:_
width:{Max
{WordFont measure(X.string $)}
{LabelFont measure(X.label $)}})
end}
NodesR = {List.toRecord o {Map Nodes fun {$ N} N.index#N end}}
fun {Height N}
if {IsDet N.height} then N.height
elseif N.parent==unit then N.height=1
else N.height=(1+{Height NodesR.(N.parent)}) end
end
MaxHeight =
{FoldL Nodes fun {$ Accu N} {Max Accu {Height N}} end 0}
Top = MaxHeight*DB.vstep+DB.margin.top
ScrollWidth =
{FoldL Nodes
fun {$ Left N} N.left=Left Left+N.width+DB.hstep end
DB.margin.left}-DB.hstep+DB.margin.left
ScrollHeight =
Top+DB.margin.top+{WordFont getDescent($)}+{WordFont getAscent($)}
{@canvas tk(configure scrollregion:q(0 0 ScrollWidth ScrollHeight))}
{ForAll Nodes
proc {$ N}
if N.parent\=unit then
P = NodesR.(N.parent)
X1 = N.left+(N.width div 2)
Y1 = N.height*DB.vstep
X2 = P.left+(P.width div 2)
Y2 = P.height*DB.vstep
in
{@canvas tk(create line X1 Y1 X2 Y2 fill:DB.sline.color
width:DB.vline.width tags:@tag)}
end
end}
{ForAll Nodes
proc {$ N}
X = N.left+(N.width div 2)
Y = N.height*DB.vstep
in
{@canvas tk(create line X Top X Y fill:DB.vline.color
width:DB.vline.width tags:@tag)}
{@canvas tk(create text X Top fill:DB.word.color
font:WordFont anchor:n text:N.string tags:@tag)}
{@canvas tk(create text X Y fill:DB.label.color
font:LabelFont anchor:s text:N.label tags:@tag)}
end}
in skip end
end
end