* ext/tk/, ext/tcltklib/: bug fix

* ext/tk/lib/tk.rb: better operation for SIGINT when processing callbacks.
* ext/tk/lib/tk/msgcat.rb: ditto.
* ext/tk/lib/tk/variable.rb: ditto.
* ext/tk/lib/tk/timer.rb: ditto.
* ext/tk/lib/tk/validation.rb: add Tk::ValidateConfigure.__def_validcmd()
  to define validatecommand methods easier
* ext/tk/lib/tk.rb (_genobj_for_tkwidget): support autoload Tk ext classes
* ext/tk/lib/tk/canvas.rb and so on: remove the parent widget type check
  for items (e.g. canvas items; depends on the class) to avoid some troubles
  on Tk extension widget class definition.
* ext/tk/lib/tkextlib/: add Iwidget and TkTable extension support
* ext/tk/sample/tkextlib/: add samples of Iwidget and TkTable


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6630 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/sample/tkextlib/tktable/debug.rb

@@ -0,0 +1,101 @@
+#!/usr/bin/env ruby
+##
+## debug.rb
+##
+## This demo uses most features of the table widget
+##
+## ( based on 'debug.tcl' included source archive of tktable extension )
+##
+require 'tk'
+require 'tkextlib/tktable'
+
+# create the table
+ary  = TkVariable.new_hash
+rows = 25
+cols = 20
+
+# fill table variable
+((-(rows))..rows).each{|x|
+  ((-(cols))..cols).each{|y|
+    ary[x,y] = "r#{x},c#{y}"
+  }
+}
+
+lbl = TkLabel.new(:text=>"TkTable v2 Example")
+
+table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :variable=>ary, 
+			:width=>6, :height=>6, 
+			:titlerows=>1, :titlecols=>2, 
+			:roworigin=>-5, :colorigin=>-2, 
+			:coltagcommand=>proc{|col|
+			  col = Integer(col)
+			  return 'OddCol' if col>0 && col%2 == 1
+			}, 
+			:selectmode=>:extended, :flashmode=>true, 
+			:rowstretch=>:unset, :colstretch=>:unset,
+			:selecttitles=>false, :drawmode=>:single)
+
+sx = table.xscrollbar(TkScrollbar.new)
+sy = table.yscrollbar(TkScrollbar.new)
+
+btn = TkButton.new(:text=>'Exit', :command=>proc{exit})
+
+Tk.grid(lbl, '-', :sticky=>:ew)
+Tk.grid(table, sy, :sticky=>:news)
+Tk.grid(sx, :sticky=>:ew)
+Tk.grid(btn, :sticky=>:ew, :columnspan=>2)
+
+Tk.root.grid_columnconfig(0, :weight=>1)
+Tk.root.grid_rowconfig(1, :weight=>1)
+
+table.tag_configure('OddCol', :bg=>'brown', :fg=>'pink')
+table.tag_configure('title',  :bg=>'red',   :fg=>'green', :relief=>:sunken)
+table.tag_configure('dis',    :state=>:disabled)
+
+first = table[:colorigin]
+%w(n s e w nw ne sw se c).each_with_index{|anchor, idx|
+  table.tag_configure(anchor, :anchor=>anchor)
+  table.tag_row(anchor, idx)
+  table.set([idx,first], anchor)
+}
+courier = TkFont.new(:family=>'Courier', :size=>10)
+table.tag_configure('s', :font=>courier, :justify=>:center)
+
+logo = TkPhotoImage.new(:file=>File.join(File.dirname(File.expand_path(__FILE__)), 'tcllogo.gif'))
+table.tag_configure('logo', :image=>logo, :showtext=>true)
+table.tag_cell('logo', [1,2], [2,3], [4,1])
+table.tag_cell('dis', [2,1], [1,-1], [3,0])
+table.set_width([-2,8], [-1,9], [0, 12], [4, 14])
+
+table.set([1,1], "multi-line\ntext\nmight be\ninteresting", 
+	  [3,2], "more\nmulti-line\nplaying\n", 
+	  [2,2], "null\0byte")
+
+# This is in the row span
+l = TkLabel.new(table, :text=>'Window s', :bg=>'yellow')
+table.window_configure([6,0], :sticky=>:s, :window=>l)
+
+# This is in the row titles
+l = TkLabel.new(table, :text=>'Window ne', :bg=>'yellow')
+table.window_configure([4,-1], :sticky=>:ne, :window=>l)
+
+# This will get swallowed by a span
+l = TkLabel.new(table, :text=>'Window ew', :bg=>'yellow')
+table.window_configure([5,3], :sticky=>:ew, :window=>l)
+
+# This is in the col titles
+l = TkLabel.new(table, :text=>'Window news', :bg=>'yellow')
+table.window_configure([-5,1], :sticky=>:news, :window=>l)
+
+l = TkLabel.new(table.winfo_parent, :text=>'Sibling l', :bg=>'orange')
+table.window_configure([5,1], :sticky=>:news, :window=>l)
+
+if table.span_list.empty?
+  table.set_spans([-1,-2], [0,3], [1,2], [0,5], [3,2], [2,2], [6,0], [4,0])
+end
+
+puts "Table is #{table.path} with array #{(table['variable'])}"
+
+# table.postscript(:file=>'out.ps', :first=>:origin, :last=>[2,2])
+
+Tk.mainloop