* 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/basic.rb

@@ -0,0 +1,60 @@
+#!/usr/bin/env ruby
+##
+## basic.rb
+##
+## This demo shows the basic use of the table widget
+## 
+## ( based on 'basic.tcl' included source archive of tktable extension )
+##
+require 'tk'
+require 'tkextlib/tktable'
+
+ary  = TkVariable.new_hash
+rows = 8
+cols = 8
+
+# fill table variable
+((-(rows))..rows).each{|x|
+  ((-(cols))..cols).each{|y|
+    ary[x,y] = "r#{x},c#{y}"
+  }
+}
+
+lbl = TkLabel.new(:text=>"TkTable v1 Example")
+
+table = Tk::TkTable.new(:rows=>rows, :cols=>cols, :variable=>ary, 
+			:width=>6, :height=>6, 
+			:titlerows=>1, :titlecols=>2, 
+			:roworigin=>-1, :colorigin=>-2, 
+			:rowstretchmode=>:last, :colstretchmode=>:last,
+			:rowtagcommand=>proc{|row|
+			  row = Integer(row)
+			  return 'OddRow' if row>0 && row%2 == 1
+			}, 
+			:coltagcommand=>proc{|col|
+			  col = Integer(col)
+			  return 'OddCol' if col>0 && col%2 == 1
+			}, 
+			:selectmode=>:extended, :sparsearray=>false)
+
+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('OddRow', :bg=>'orange', :fg=>'purple')
+table.tag_configure('OddCol', :bg=>'brown', :fg=>'pink')
+
+table.set_width([-2, 7], [-1, 7], [1, 5], [2, 8], [4, 14])
+
+puts "Table is #{table.path} with array #{(table['variable'])}"
+
+Tk.mainloop