498 lines
13 KiB
Ruby
498 lines
13 KiB
Ruby
#
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# tkcombobox.rb : auto scrollbox & combobox
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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 AutoScrollListbox < TkListbox
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end
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class Combobox < TkEntry
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end
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end
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end
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class Tk::RbWidget::AutoScrollListbox
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include TkComposite
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@@up_bmp = TkBitmapImage.new(:data=><<EOD)
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#define up_arrow_width 9
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#define up_arrow_height 9
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static unsigned char up_arrow_bits[] = {
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0x00, 0x00, 0x10, 0x00, 0x10, 0x00, 0x38, 0x00, 0x38, 0x00, 0x7c, 0x00,
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0x7c, 0x00, 0xfe, 0x00, 0x00, 0x00};
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EOD
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@@down_bmp = TkBitmapImage.new(:data=><<EOD)
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#define up_arrow_width 9
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#define up_arrow_height 9
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static unsigned char down_arrow_bits[] = {
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0x00, 0x00, 0xfe, 0x00, 0x7c, 0x00, 0x7c, 0x00, 0x38, 0x00, 0x38, 0x00,
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0x10, 0x00, 0x10, 0x00, 0x00, 0x00};
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EOD
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############################
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private
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############################
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def initialize_composite(keys={})
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keys = _symbolkey2str(keys)
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@initwait = keys.delete('startwait'){300}
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@interval = keys.delete('interval'){150}
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@initwait -= @interval
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@initwait = 0 if @initwait < 0
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@lbox = TkListbox.new(@frame, :borderwidth=>0)
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@path = @lbox.path
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TkPack.propagate(@lbox, false)
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@scr = TkScrollbar.new(@frame, :width=>10)
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@lbox.yscrollcommand(proc{|*args| @scr.set(*args); _config_proc})
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@scr.command(proc{|*args| @lbox.yview(*args); _config_proc})
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@up_arrow = TkLabel.new(@lbox, :image=>@@up_bmp,
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:relief=>:raised, :borderwidth=>1)
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@down_arrow = TkLabel.new(@lbox, :image=>@@down_bmp,
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:relief=>:raised, :borderwidth=>1)
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_init_binding
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@lbox.pack(:side=>:left, :fill=>:both, :expand=>:true)
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delegate('DEFAULT', @lbox)
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delegate('background', @frame, @scr)
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delegate('activebackground', @scr)
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delegate('troughcolor', @scr)
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delegate('repeatdelay', @scr)
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delegate('repeatinterval', @scr)
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delegate('relief', @frame)
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delegate('borderwidth', @frame)
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delegate_alias('arrowrelief', 'relief', @up_arrow, @down_arrow)
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delegate_alias('arrowborderwidth', 'borderwidth', @up_arrow, @down_arrow)
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scrollbar(keys.delete('scrollbar')){false}
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configure keys unless keys.empty?
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end
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def _show_up_arrow
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unless @up_arrow.winfo_mapped?
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@up_arrow.pack(:side=>:top, :fill=>:x)
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end
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end
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def _show_down_arrow
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unless @down_arrow.winfo_mapped?
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@down_arrow.pack(:side=>:bottom, :fill=>:x)
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end
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end
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def _set_sel(idx)
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@lbox.activate(idx)
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@lbox.selection_clear(0, 'end')
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@lbox.selection_set(idx)
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end
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def _check_sel(cidx, tidx = nil, bidx = nil)
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_set_sel(cidx)
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unless tidx
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tidx = @lbox.nearest(0)
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tidx += 1 if tidx > 0
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end
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unless bidx
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bidx = @lbox.nearest(10000)
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bidx -= 1 if bidx < @lbox.index('end') - 1
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end
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if cidx > bidx
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_set_sel(bidx)
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end
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if cidx < tidx
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_set_sel(tidx)
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end
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end
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def _up_proc
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cidx = @lbox.curselection[0]
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idx = @lbox.nearest(0)
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if idx >= 0
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@lbox.see(idx - 1)
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_set_sel(idx)
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@up_arrow.pack_forget if idx == 1
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@up_timer.stop if idx == 0
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_show_down_arrow if @lbox.bbox('end') == []
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end
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if cidx && cidx > 0 && (idx == 0 || cidx == @lbox.nearest(10000))
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_set_sel(cidx - 1)
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end
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end
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def _down_proc
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cidx = @lbox.curselection[0]
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eidx = @lbox.index('end') - 1
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idx = @lbox.nearest(10000)
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if idx <= eidx
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@lbox.see(idx + 1)
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_set_sel(cidx + 1) if cidx < eidx
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@down_arrow.pack_forget if idx + 1 == eidx
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@down_timer.stop if idx == eidx
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_show_up_arrow if @lbox.bbox(0) == []
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end
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if cidx && cidx < eidx && (eidx == idx || cidx == @lbox.nearest(0))
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_set_sel(cidx + 1)
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end
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end
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def _key_UP_proc
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cidx = @lbox.curselection[0]
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_set_sel(cidx = @lbox.index('activate')) unless cidx
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cidx -= 1
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if cidx == 0
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@up_arrow.pack_forget
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elsif cidx == @lbox.nearest(0)
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@lbox.see(cidx - 1)
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end
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end
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def _key_DOWN_proc
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cidx = @lbox.curselection[0]
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_set_sel(cidx = @lbox.index('activate')) unless cidx
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cidx += 1
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if cidx == @lbox.index('end') - 1
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@down_arrow.pack_forget
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elsif cidx == @lbox.nearest(10000)
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@lbox.see(cidx + 1)
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end
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end
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def _config_proc
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if @lbox.size == 0
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@up_arrow.pack_forget
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@down_arrow.pack_forget
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return
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end
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tidx = @lbox.nearest(0)
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bidx = @lbox.nearest(10000)
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if tidx > 0
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_show_up_arrow
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tidx += 1
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else
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@up_arrow.pack_forget unless @up_timer.running?
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end
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if bidx < @lbox.index('end') - 1
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_show_down_arrow
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bidx -= 1
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else
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@down_arrow.pack_forget unless @down_timer.running?
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end
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cidx = @lbox.curselection[0]
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_check_sel(cidx, tidx, bidx) if cidx
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end
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def _init_binding
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@up_timer = TkAfter.new(@interval, -1, proc{_up_proc})
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@down_timer = TkAfter.new(@interval, -1, proc{_down_proc})
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@up_timer.set_start_proc(@initwait, proc{})
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@down_timer.set_start_proc(@initwait, proc{})
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@up_arrow.bind('Enter', proc{@up_timer.start})
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@up_arrow.bind('Leave', proc{@up_timer.stop if @up_arrow.winfo_mapped?})
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@down_arrow.bind('Enter', proc{@down_timer.start})
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@down_arrow.bind('Leave', proc{@down_timer.stop if @down_arrow.winfo_mapped?})
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@lbox.bind('Configure', proc{_config_proc})
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@lbox.bind('Enter', proc{|y| _set_sel(@lbox.nearest(y))}, '%y')
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@lbox.bind('Motion', proc{|y|
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@up_timer.stop if @up_timer.running?
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@down_timer.stop if @down_timer.running?
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_check_sel(@lbox.nearest(y))
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}, '%y')
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@lbox.bind('Up', proc{_key_UP_proc})
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@lbox.bind('Down', proc{_key_DOWN_proc})
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end
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############################
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public
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############################
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def scrollbar(mode)
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if mode
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@scr.pack(:side=>:right, :fill=>:y)
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else
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@scr.pack_forget
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end
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end
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end
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################################################
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class Tk::RbWidget::Combobox < TkEntry
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include TkComposite
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@@down_btn_bmp = TkBitmapImage.new(:data=><<EOD)
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#define down_arrow_width 11
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#define down_arrow_height 11
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static unsigned char down_arrow_bits[] = {
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0x00, 0x00, 0xfe, 0x03, 0xfc, 0x01, 0xfc, 0x01, 0xf8, 0x00, 0xf8, 0x00,
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0x70, 0x00, 0x70, 0x00, 0x20, 0x00, 0x20, 0x00, 0x00, 0x00};
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EOD
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@@up_btn_bmp = TkBitmapImage.new(:data=><<EOD)
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#define up_arrow_width 11
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#define up_arrow_height 11
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static unsigned char up_arrow_bits[] = {
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0x00, 0x00, 0x20, 0x00, 0x20, 0x00, 0x70, 0x00, 0x70, 0x00, 0xf8, 0x00,
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0xf8, 0x00, 0xfc, 0x01, 0xfc, 0x01, 0xfe, 0x03, 0x00, 0x00};
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EOD
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def _button_proc(dir = true)
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return if @ent.state == 'disabled'
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@btn.relief(:sunken)
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x = @frame.winfo_rootx
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y = @frame.winfo_rooty
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if dir
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@top.geometry("+#{x}+#{y + @frame.winfo_height}")
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else
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@btn.image(@@up_btn_bmp)
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@top.geometry("+#{x}+#{y - @top.winfo_reqheight}")
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end
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@top.deiconify
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@lst.focus
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if (idx = values.index(@ent.value))
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@lst.see(idx - 1)
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@lst.activate(idx)
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@lst.selection_set(idx)
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elsif @lst.size > 0
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@lst.see(0)
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@lst.activate(0)
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@lst.selection_set(0)
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end
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@top.grab
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begin
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@wait_var.tkwait
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if (idx = @wait_var.to_i) >= 0
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# @ent.value = @lst.get(idx)
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_set_entry_value(@lst.get(idx))
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end
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@top.withdraw
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@btn.relief(:raised)
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@btn.image(@@down_btn_bmp)
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rescue
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ensure
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begin
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@top.grab(:release)
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@ent.focus
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rescue
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end
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end
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end
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private :_button_proc
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def _init_bindings
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@btn.bind('1', proc{_button_proc(true)})
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@btn.bind('3', proc{_button_proc(false)})
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@lst.bind('1', proc{|y| @wait_var.value = @lst.nearest(y)}, '%y')
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@lst.bind('Return', proc{@wait_var.value = @lst.curselection[0]})
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cancel = TkVirtualEvent.new('2', '3', 'Escape')
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@lst.bind(cancel, proc{@wait_var.value = -1})
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end
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private :_init_bindings
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def _set_entry_value(val)
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@ent.textvariable.value = val
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end
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private :_set_entry_value
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#----------------------------------------------------
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def _state_control(value = None)
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if value == None
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# get
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@ent.state
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else
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# set
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@ent.state(value.to_s)
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case value = @ent.state # regulate 'state' string
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when 'normal', 'readonly'
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@btn.state 'normal'
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when 'disabled'
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@btn.state 'disabled'
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else
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# unknown : do nothing
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end
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end
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end
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private :_state_control
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def __methodcall_optkeys # { key=>method, ... }
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{'state' => :_state_control}
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end
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private :__methodcall_optkeys
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#----------------------------------------------------
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def _textvariable_control(var = None)
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if var == None
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# get
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((var = @ent.textvariable) === @default_var)? nil: var
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else
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# set
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@var = var
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tk_send('configure', '-textvariable', (@var)? var: @default_var)
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end
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end
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private :_textvariable_control
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#----------------------------------------------------
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def initialize_composite(keys={})
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keys = _symbolkey2str(keys)
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@btn = TkLabel.new(@frame, :relief=>:raised, :borderwidth=>2,
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:image=>@@down_btn_bmp).pack(:side=>:right,
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:ipadx=>2, :fill=>:y)
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@ent = TkEntry.new(@frame).pack(:side=>:left)
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@path = @ent.path
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@top = TkToplevel.new(@btn, :borderwidth=>1, :relief=>:raised) {
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withdraw
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transient
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overrideredirect(true)
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}
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startwait = keys.delete('startwait'){300}
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interval = keys.delete('interval'){150}
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@lst = Tk::RbWidget::AutoScrollListbox.new(@top, :scrollbar=>true,
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:startwait=>startwait,
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:interval=>interval)
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@lst.pack(:fill=>:both, :expand=>true)
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@ent_list = []
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@wait_var = TkVariable.new
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@var = @default_var = TkVariable.new
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@ent.textvariable @default_var
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_init_bindings
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option_methods('textvariable' => :_textvariable_control)
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delegate('DEFAULT', @ent)
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delegate('height', @lst)
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delegate('relief', @frame)
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delegate('borderwidth', @frame)
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delegate('arrowrelief', @lst)
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delegate('arrowborderwidth', @lst)
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delegate('state', false)
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if mode = keys.delete('scrollbar')
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scrollbar(mode)
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end
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configure keys unless keys.empty?
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end
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private :initialize_composite
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def scrollbar(mode)
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@lst.scrollbar(mode)
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end
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def _reset_width
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len = @ent.width
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@lst.get(0, 'end').each{|l| len = l.length if l.length > len}
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@lst.width(len + 1)
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end
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private :_reset_width
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def add(ent)
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ent = ent.to_s
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unless @ent_list.index(ent)
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@ent_list << ent
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@lst.insert('end', ent)
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end
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_reset_width
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self
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end
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def remove(ent)
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ent = ent.to_s
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@ent_list.delete(ent)
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if idx = @lst.get(0, 'end').index(ent)
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@lst.delete(idx)
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end
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_reset_width
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self
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end
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def values(ary = nil)
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if ary
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@lst.delete(0, 'end')
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@ent_list.clear
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ary.each{|ent| add(ent)}
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_reset_width
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self
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else
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@lst.get(0, 'end')
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end
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end
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def see(idx)
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@lst.see(@lst.index(idx) - 1)
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end
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def list_index(idx)
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@lst.index(idx)
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end
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end
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################################################
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# test
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################################################
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if __FILE__ == $0
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# e0 = Tk::RbWidget::Combobox.new.pack
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# e0.values(%w(aa bb cc dd ee ff gg hh ii jj kk ll mm nn oo pp qq rr ss tt uu))
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v = TkVariable.new
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e = Tk::RbWidget::Combobox.new(:height=>7, :scrollbar=>true,
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:textvariable=>v,
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:arrowrelief=>:flat, :arrowborderwidth=>0,
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:startwait=>400, :interval=>200).pack
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e.values(%w(aa bb cc dd ee ff gg hh ii jj kk ll mm nn oo pp qq rr ss tt uu))
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#e.see(e.list_index('end') - 2)
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e.value = 'cc'
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TkFrame.new{|f|
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fnt = TkFont.new('Helvetica 10')
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TkLabel.new(f, :font=>fnt, :text=>'TkCombobox value :').pack(:side=>:left)
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TkLabel.new(f, :font=>fnt, :textvariable=>v).pack(:side=>:left)
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}.pack
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TkFrame.new(:relief=>:raised, :borderwidth=>2,
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:height=>3).pack(:fill=>:x, :expand=>true, :padx=>5, :pady=>3)
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l = Tk::RbWidget::AutoScrollListbox.new(nil, :relief=>:groove,
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:borderwidth=>4,:height=>7,
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:width=>20).pack(:fill=>:both,
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:expand=>true)
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(0..20).each{|i| l.insert('end', "line #{i}")}
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TkFrame.new(:relief=>:ridge, :borderwidth=>3){
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TkButton.new(self, :text=>'ON',
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:command=>proc{l.scrollbar(true)}).pack(:side=>:left)
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TkButton.new(self, :text=>'OFF',
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:command=>proc{l.scrollbar(false)}).pack(:side=>:right)
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pack(:fill=>:x)
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}
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Tk.mainloop
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end
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