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#
# Editable_TkListbox class
#
# When "DoubleClick-1" on a listbox item, the entry box is opend on the
# item. And when hit "Return" key on the entry box after modifying the
# text, the entry box is closed and the item is changed. Or when hit
# "Escape" key, the entry box is closed without modification.
#
# by Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
#
require 'tk'
class Editable_TkListbox < TkListbox
def _ebox_placer(coord_y)
idx = self.nearest(coord_y)
x, y, w, h = self.bbox(idx)
@ebox.place(:x => 0, :relwidth => 1.0,
:y => y - self.selectborderwidth,
:height => h + 2 * self.selectborderwidth)
@ebox.pos = idx
@ebox.value = self.listvariable.list[idx]
@ebox.focus
end
private :_ebox_placer
def create_self(keys)
super(keys)
unless self.listvariable
self.listvariable = TkVariable.new(self.get(0, :end))
end
@ebox = TkEntry.new(self){
@pos = -1
def self.pos; @pos; end
def self.pos=(idx); @pos = idx; end
}
@ebox.bind('Return'){
list = self.listvariable.list
list[@ebox.pos] = @ebox.value
self.listvariable.value = list
@ebox.place_forget
@ebox.pos = -1
}
@ebox.bind('Escape'){
@ebox.place_forget
@ebox.pos = -1
}
self.bind('Double-1', '%y'){|y| _ebox_placer(y) }
end
end
if $0 == __FILE__
scr = TkScrollbar.new.pack(:side=>:right, :fill=>:y)
lbox1 = Editable_TkListbox.new.pack(:side=>:left)
lbox2 = Editable_TkListbox.new.pack(:side=>:left)
scr.assign(lbox1, lbox2)
lbox1.insert(:end, *%w(a b c d e f g h i j k l m n))
lbox2.insert(:end, 0,1,2,3,4,5,6,7,8,9,0,1,2,3)
Tk.mainloop
end
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