* ext/tk/lib/tk/event.rb: fix error on require process
* ext/tk/lib/font.rb: fix abnormal termination error on Windows
* ext/tk/lib/tk/virtevent.rb: TkVirtualEvent::PreDefVirtEvent.new()
accepts event-sequence arguments
* ext/tk/lib/text.rb: fail to dump embedded images
* ext/tk/lib/text.rb: tag_nextrange and tag_prevrange returns wrong
types of values
* ext/tk/lib/texttag.rb: nextrange and prevrange returns wrong types of values
* ext/tk/lib/text.rb: add TkText::IndexModMethods module and
TkText::IndexString class to treat text index modifiers
* ext/tk/lib/texttag.rb: use TkText::IndexModMethods module
* ext/tk/lib/textmark.rb: ditto
* ext/tk/lib/textimage.rb: ditto
* ext/tk/lib/textwindow.rb: ditto
* ext/tk/lib/textimage.rb: wrong gravity of text mark for embedded image
* ext/tk/lib/textwindow.rb: wrong gravity of text mark for embedded window
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7588 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 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
