149 lines
3.2 KiB
Ruby
149 lines
3.2 KiB
Ruby
#
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# Tk::RbWidget::Editable_Listbox class
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#
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# When "DoubleClick-1" on a listbox item, the entry box is opend on the
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# item. And when hit "Return" key on the entry box after modifying the
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# text, the entry box is closed and the item is changed. Or when hit
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# "Escape" key, the entry box is closed without modification.
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#
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# by Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
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#
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require 'tk'
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module Tk
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module RbWidget
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class Editable_Listbox < TkListbox
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end
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end
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end
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class Tk::RbWidget::Editable_Listbox < TkListbox
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#------------------------------------
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BindTag = TkBindTag.new_by_name(self.to_s.gsub(/::/, '#'))
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BindTag.bind('FocusIn', :widget){|w|
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w.instance_eval{
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if idx = @ebox.pos
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see(idx) if bbox(idx).empty?
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@ebox.focus(true)
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end
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}
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}
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BindTag.bind('Double-1', :widget, :y){|w, y|
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w.instance_eval{ _ebox_placer(nearest(y)) }
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}
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BindTag.bind('Return', :widget){|w|
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w.instance_eval{
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if idx = index(:active)
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_ebox_placer(idx)
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end
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}
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}
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#------------------------------------
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def configure(*args)
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ret = super
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case cget(:state)
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when 'normal'
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# do nothing
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when 'disabled'
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_ebox_erase
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else # unknown
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# do nothing
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end
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ret
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end
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def _ebox_move(idx)
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return nil if cget(:state) == 'disabled'
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x, y, w, h = bbox(idx)
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return nil unless y && h
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@ebox.place(:x => 0, :relwidth => 1.0,
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:y => y - selectborderwidth,
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:height => h + 2 * selectborderwidth)
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@ebox.pos = idx
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@ebox.focus
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end
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def _ebox_placer(idx)
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return nil unless _ebox_move(idx)
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@ebox.value = listvariable.list[idx]
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@ebox.xview_moveto(self.xview[0])
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end
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def _ebox_erase
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@ebox.place_forget
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@ebox.pos = nil
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end
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private :_ebox_move, :_ebox_placer, :_ebox_erase
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def _setup_ebox_bindings
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# bindings for entry
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@ebox.bind('Return'){
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list = listvariable.list
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list[@ebox.pos] = @ebox.value if @ebox.pos
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listvariable.value = list
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_ebox_erase
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focus
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}
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@ebox.bind('Escape'){ _ebox_erase }
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end
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def _setup_listbox_bindings
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# bindings for listbox
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tags = bindtags
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bindtags(tags.insert(tags.index(self) + 1, self.class::BindTag))
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end
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private :_setup_ebox_bindings, :_setup_listbox_bindings
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def yview(*args)
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if !@ebox.pos || bbox(@ebox.pos).empty?
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@ebox.place_forget
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else
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_ebox_move(@ebox.pos)
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end
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super
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end
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def create_self(keys)
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super(keys)
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unless self.listvariable
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self.listvariable = TkVariable.new(self.get(0, :end))
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end
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@ebox = TkEntry.new(self){
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@pos = nil
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def self.pos; @pos; end
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def self.pos=(idx); @pos = idx; end
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}
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_setup_ebox_bindings
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_setup_listbox_bindings
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end
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end
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if $0 == __FILE__
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#lbox0 = TkListbox.new.pack(:side=>:left)
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#lbox0.insert(:end, 0,1,2,3,4,5,6,7,8,9,0,1,2,3)
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scr = TkScrollbar.new.pack(:side=>:right, :fill=>:y)
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lbox1 = Tk::RbWidget::Editable_Listbox.new.pack(:side=>:left)
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lbox2 = Tk::RbWidget::Editable_Listbox.new.pack(:side=>:left)
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scr.assign(lbox1, lbox2)
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lbox1.insert(:end, *%w(a b c d e f g h i j k l m n))
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lbox2.insert(:end, 0,1,2,3,4,5,6,7,8,9,0,1,2,3)
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Tk.mainloop
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end
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