1 files changed, 66 insertions, 0 deletions
diff --git a/ext/tk/lib/tkvirtevent.rb b/ext/tk/lib/tkvirtevent.rb
new file mode 100644
index 0000000000..0d100c2186
--- /dev/null
+++ b/ext/tk/lib/tkvirtevent.rb
@@ -0,0 +1,66 @@
+#
+#   tkvirtevent.rb : treats virtual events
+#                     1998/07/16 by Hidetoshi Nagai <nagai@ai.kyutech.ac.jp>
+#
+require 'tk'
+
+class TkVirtualEvent<TkObject
+  extend Tk
+
+  TkVirturlEventID = [0]
+  TkVirturlEventTBL = {}
+
+  def TkVirtualEvent.getobj(event)
+    obj = TkVirturlEventTBL[event]
+    obj ? obj : event
+  end
+
+  def TkVirtualEvent.info
+    tk_call('event', 'info').split(/\s+/).filter{|seq|
+      TkVirtualEvent.getobj(seq[1..-2])
+    }
+  end
+
+  def initialize(*sequences)
+    @path = @id = format("<VirtEvent%.4d>", TkVirturlEventID[0])
+    TkVirturlEventID[0] += 1
+    add(*sequences)
+  end
+
+  def add(*sequences)
+    if sequences != []
+      tk_call('event', 'add', "<#{@id}>", 
+	      *(sequences.collect{|seq| "<#{tk_event_sequence(seq)}>"}) )
+      TkVirturlEventTBL[@id] = self
+    end
+    self
+  end
+
+  def delete(*sequences)
+    if sequences == []
+      tk_call('event', 'delete', "<#{@id}>")
+      TkVirturlEventTBL[@id] = nil
+    else
+      tk_call('event', 'delete', "<#{@id}>", 
+	      *(sequences.collect{|seq| "<#{tk_event_sequence(seq)}>"}) )
+      TkVirturlEventTBL[@id] = nil if info == []
+    end
+    self
+  end
+
+  def info
+    tk_call('event', 'info', "<#{@id}>").split(/\s+/).filter{|seq|
+      l = seq.scan(/<*[^<>]+>*/).filter{|subseq|
+	case (subseq)
+	when /^<<[^<>]+>>$/
+	  TkVirtualEvent.getobj(subseq[1..-2])
+	when /^<[^<>]+>$/
+	  subseq[1..-2]
+	else
+	  subseq.split('')
+	end
+      }.flatten
+      (l.size == 1) ? l[0] : l
+    }
+  end
+end