From: matz@... (Yukihiro Matsumoto)
Date: 1997-01-20T10:36:32+09:00
Subject: [ruby-list:1775] Re: variable and value (TkRadioButton)

まつもと ゆきひろです

In message "[ruby-list:1770] variable and value (TkRadioButton)"
    on 97/01/19, Noritugu Nakamura <nnakamur@tamaru.kuee.kyoto-u.ac.jp> writes:

|中村です。
|
|↓と同じのを ruby/Tk で書いたつもりなのですが、
|同じ動作をしません。どうしてでしょうか？

例によってバグです．以下のパッチで直っているようです．
# rubyのソースがあるディレクトリで patch -pしてください

--- lib/tk.rb~	Sat Jan 18 01:06:00 1997
+++ lib/tk.rb	Mon Jan 20 10:33:50 1997
@@ -358,6 +358,32 @@
   def bind(context, cmd=Proc.new, args=nil)
     _bind path, context, cmd, args
   end
+
+
+  def tk_trace_variable(v)
+    v = v.id2name unless v.kind_of? String
+    if v !~ /^\$/
+      fail ArgumentError, "variable must be global(%s)", v
+    end
+    vn = 'tk_trace_v_' + v
+    vset = format("global {%s}; set {%s} %%s", vn, vn)
+    tk_write vset, eval(v).inspect
+    trace_var v, proc{|val|
+      tk_write vset, val.inspect
+    }
+    tk_call 'trace vdelete', vn, 'w', @var_id if @var_id
+    @var_id = install_cmd(proc{|name1,|
+      val = tk_call(format('global %s; set', name1), name1)
+      eval(format("%s = '%s'", v.id2name, val))
+    })
+    tk_call 'trace', 'variable', vn, 'w', @var_id
+    vn
+  end
+  private :tk_trace_variable
+
+  def destroy
+    tk_call 'trace vdelete', vn, 'w', @var_id if @var_id
+  end
 end
 
 class TkWindow<TkObject
@@ -473,6 +499,7 @@
       end
     end
     $tk_window_list[path] = nil
+    super
   end
 end
 
@@ -516,14 +543,7 @@
     tk_call 'label', @path
   end
   def textvariable(v)
-    v = v.id2name unless v.kind_of? String
-    vn = @path + v
-    vset = format("global {%s}; set {%s} %%s", vn, vn)
-    tk_write vset, eval(v).inspect
-    trace_var v, proc{|val|
-      tk_write vset, val.inspect
-    }
-    configure 'textvariable', vn
+    configure 'textvariable', tk_trace_variable(v)
   end
 end
 
@@ -550,24 +570,7 @@
     tk_send 'select'
   end
   def variable(v)
-    v = v.id2name unless v.kind_of? String
-    if v !~ /^\$/
-      fail ArgumentError, "variable must be global(%s)", v
-    end
-    vn = 'btns_selected_' + v
-    trace_var v, proc{|val|
-      tk_write 'global %s; set %s %s', vn, val
-    }
-    @var_id = install_cmd(proc{|name1,|
-      val = tk_call(format('global %s; set', name1), name1)
-      eval(format("%s = '%s'", v.id2name, val))
-    })
-    tk_call 'trace', 'variable', vn, 'w', @var_id
-    configure 'variable', vn
-  end
-  def destroy
-    tk_call 'trace vdelete', vn, 'w', @var_id
-    super
+    configure 'variable', tk_trace_variable(v)
   end
 end